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MalwareUsed by 1 actor

StrongPity

Also known asStrongPity2

StrongPity is a modular malware family/backdoor associated with the PROMETHIUM threat actor and used in activity tracked as C0033. The provided content describes both Windows and Android variants. On Windows, StrongPity has been distributed via compromised installation files for legitimate software, including compression tools, security software, browsers, file recovery applications, and other utilities. A cited Windows sample drops a legitimate installer into the Temp directory while creating a separate directory for malicious files. StrongPity can collect and exfiltrate documents over its command-and-control channel, encrypt C2 traffic with SSL/TLS, use multiple proxy layers to hide terminal infrastructure nodes, and add files or directories used by the malware to Windows Defender exclusions, including via PowerShell, to reduce detection. The malware has also been observed signed with self-signed certificates.

The content further states that StrongPity has expanded to Android, with researchers assessing that the actor is actively developing Android backdoors. Android samples were delivered through repackaged legitimate applications, fake apps, and compromised websites, including a trojanized Syria eGov application and a fake Samsung Security Service app. The Android tooling is described as modular and similar in structure and behavior to StrongPity’s Windows malware, including file collection and exfiltration. During C0033, PROMETHIUM used StrongPity on Android to communicate with C2 over HTTPS, exfiltrate data over HTTPS, collect SMS messages, call logs, device contact lists, and device information such as SIM serial number. The Android malware also targeted files with extensions including .7z, .asc, .dgs, .doc, .docx, .gpg, .pdf, .pgp, .ppt, .pptx, .rar, .rjv, .rms, .rtf, .sft, .tc, .txt, .xls, and .xlsx.

A newer Android version referred to in the content as StrongPity2 adds modular loading, SQLite-based local data storage, additional message types, split heartbeat/config handling, screen event persistence via a ScreenReceiver component, and the ability to execute the "su" command on rooted devices to silently grant permissions such as accessibility and notification access. The content states there was no evidence that the sample rooted devices itself. Version 2 reportedly downloads additional modules from C2 into <DIR>/.android/.li for possible execution and uses AES key "aaaanothingimpossiblebbb" with IV "aaaanothingimpos".

High-confidence infrastructure and sample details mentioned in the content include Android C2 domains upn-sec3-msd[.]com, networktopologymaps[.]com, hostoperationsystems[.]com, upeg-system-app[.]com, and Internetwideband[.]com; a service URL of https://www.upn-sec3-msd[.]com/ProxyServer/service/; Windows sample SHA256 12818a96211b7c47863b109be63e951075cf6a41652464a584dd2f26010f7535; Android sample SHA1 74582c3d920332117541a9bbc6b8995fbe7e1aff; and Android sample SHA256 values fd1aac87399ad22234c503d8adb2ae9f0d950b6edf4456b1515a30100b5656a7, 374d92f553c28e9dad1aa7f5d334a07dede1e5ad19c3766efde74290d0c49afb, a9378a5469319faffc48f3aa70f5b352d5acb7d361c5177a9aac90d9c58bb628, be9214a5804632004f7fd5b90fbac3e23f44bb7f0a252b8277dd7e9d8b8a52f3, 596257ef017b02ba6961869d78a2317500a45f00c76682a22bbdbd3391857b5d, and 75dc2829abb951ff970debfba9f66d4d7c6b7c48a823a911dd5874f74ac63d7b. The Android samples are detected in the cited reporting as AndroidOS_StrongPity.HRX.

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THREAT ACTORS

Groups observed using it

1 distinct threat actor attributed by public researchers. Open in Mallory to see the full evidence chain and overlapping campaigns.

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PROMETHIUM

If we examine another StrongPity sample ... the logic is similar — it drops a normal installer into the Temp directory and creates a directory for dropped malicious files... We believe that the StrongPity Threat actor is actively developing backdoors for Android.

via trendmicro comtrendmicro.com
MITRE ATT&CK

Techniques & procedures

25 distinct techniques documented for this family, organized by ATT&CK tactic.

Execution

3 techniques
T1059.001PowerShellEvidence2
TacticExecution

The content repeatedly describes threat actors and malware using PowerShell scripts/commands for execution, download, staging, reconnaissance, persistence, credential access, lateral movement, and defense evasion; e.g., "Sandworm Team used PowerShell scripts to run a credential harvesting tool in memory to evade defenses."

T1204User ExecutionEvidence1
TacticExecution

The content repeatedly describes victims being lured into opening malicious attachments, enabling macros, launching installers, clicking embedded files/links, or otherwise directly executing malicious content.

T1569.002Service ExecutionEvidence1
TacticExecution

"Anchor can create and execute services to load its payload"; "APT32's backdoor has used Windows services as a way to execute its malicious payload"; "Ragnar Locker has used sc.exe to execute a service that it creates"; "Shamoon creates a new service named 'ntssrv' to execute the payload"

Persistence

3 techniques
T1112Modify RegistryEvidence1

Across the content, malware repeatedly 'adds Registry Run keys', 'creates Registry entries', 'modifies the Windows Registry', or 'overwrites registry keys' to maintain persistence.

T1543.003Windows ServiceEvidence1

“Sandworm Team used an arbitrary system service to load at system boot for persistence for Industroyer… replaced the ImagePath registry value of a Windows service with a new backdoor binary… [multiple groups/malware] creating a service / installing as a service / modifying service configurations for persistence.”

T1547.001Registry Run Keys / Startup FolderEvidence3

The content repeatedly describes malware and threat actors establishing persistence by adding values under HKCU/HKLM\Software\Microsoft\Windows\CurrentVersion\Run or RunOnce, and by placing executables, scripts, .lnk files, or .bat files in the Windows Startup folder.

T1543.003Windows ServiceEvidence1

“Sandworm Team used an arbitrary system service to load at system boot for persistence for Industroyer… replaced the ImagePath registry value of a Windows service with a new backdoor binary… [multiple groups/malware] creating a service / installing as a service / modifying service configurations for persistence.”

T1547.001Registry Run Keys / Startup FolderEvidence3

The content repeatedly describes malware and threat actors establishing persistence by adding values under HKCU/HKLM\Software\Microsoft\Windows\CurrentVersion\Run or RunOnce, and by placing executables, scripts, .lnk files, or .bat files in the Windows Startup folder.

Stealth

5 techniques
T1027Obfuscated Files or InformationEvidence4
TacticStealth

The content repeatedly describes payloads, strings, configuration files, scripts, URLs, and binaries being obfuscated or encoded using Base64, XOR, RC4, AES, RSA, hex encoding, custom algorithms, and other methods across many malware families and threat actors.

T1036MasqueradingEvidence2
TacticStealth

During the 2016 Ukraine Electric Power Attack, DLLs and EXEs with filenames associated with common electric power sector protocols were used to masquerade files.

T1036.003Rename Legitimate UtilitiesEvidence1
TacticStealth

Bad Rabbit has masqueraded as a Flash Player installer through the executable file install_flash_player.exe.

T1070.004File DeletionEvidence6
TacticStealth

The content repeatedly describes adversaries and malware deleting files, directories, droppers, scripts, logs, archives, staged data, and other artifacts from compromised systems, e.g., 'APT29 has used SDelete to remove artifacts from victim networks' and 'Lazarus Group malware has deleted files in various ways, including "suicide scripts" to delete malware binaries from the victim.' | Several entries explicitly state files were deleted after exfiltration or upload, such as 'AppleSeed can delete files from a compromised host after they are exfiltrated,' 'Attor’s plugin deletes the collected files and log files after exfiltration,' and 'Ursnif has deleted data staged in tmp files after exfiltration.'

T1564.003Hidden WindowEvidence1
TacticStealth

Multiple actors and malware are described as concealing execution by spawning PowerShell/console windows with parameters like "-WindowStyle Hidden" / "-W Hidden" / "ProcessWindowStyle.Hidden" or via APIs such as ShowWindow, CreateNoWindow, and CREATE_NO_WINDOW.

Defense Impairment

2 techniques
T1112Modify RegistryEvidence1

Across the content, malware repeatedly 'adds Registry Run keys', 'creates Registry entries', 'modifies the Windows Registry', or 'overwrites registry keys' to maintain persistence.

T1553.002Code SigningEvidence1

The content repeatedly describes threat actors and malware using valid, stolen, forged, self-signed, or abused code-signing certificates to sign malware and appear legitimate, including examples such as AppleJeus using a valid digital signature from Sectigo, APT41 leveraging code-signing certificates, FIN7 signing Carbanak payloads, and SUNBURST being digitally signed by SolarWinds.

Discovery

4 techniques
T1016System Network Configuration DiscoveryEvidence3
TacticDiscovery

The content repeatedly describes actors and malware using commands and APIs such as ipconfig /all, ifconfig, arp -a, route print, netsh interface show, GetAdaptersInfo, and GetIpNetTable to gather IP addresses, MAC addresses, DNS, DHCP, gateways, routing tables, ARP cache, proxy settings, and network adapter/interface details.

T1057Process DiscoveryEvidence2
TacticDiscovery

The content repeatedly describes malware and threat actors obtaining lists of running processes, using utilities such as tasklist, ps, WMI, Get-Process, CreateToolhelp32Snapshot, EnumProcesses, and similar APIs/commands to enumerate active processes on victim systems.

T1082System Information DiscoveryEvidence2
TacticDiscovery

"admin@338 actors used the following commands after exploiting a machine with LOWBALL malware to obtain information about the OS: ver >> %temp%\download systeminfo >> %temp%\download"; "ADVSTORESHELL can run Systeminfo to gather information about the victim."; "Kimsuky has enumerated drives, OS type, OS version, and other information using a script or the 'systeminfo' command."

T1083File and Directory DiscoveryEvidence3
TacticDiscovery

"...has a command to retrieve metadata for files on disk as well as a command to list the current working directory." / "...can list files and directories." / "...used the following commands... to obtain information about files and directories: dir c:\ >> %temp%\download ..."

Collection

1 technique
T1005Data from Local SystemEvidence1

Confucius has used a file stealer to steal documents and images with the following extensions: txt, pdf, png, jpg, doc, xls, xlm, odp, ods, odt, rtf, ppt, xlsx, xlsm, docx, pptx, and jpeg.

T1071.001Web ProtocolsEvidence4

The content repeatedly describes threat actors, malware, and campaigns using HTTP and/or HTTPS for command and control, including examples such as BlackEnergy communicating with C2 over HTTP POST requests and many other families using HTTP/S for C2.

T1090.003Multi-hop ProxyEvidence2

During the 2025 Poland Wiper Attacks, the adversaries utilized Tor nodes for C2. APT28 has routed traffic over Tor and VPN servers to obfuscate their activities. A backdoor used by APT29 created a Tor hidden service to forward traffic from the Tor client to local ports 3389 (RDP), 139 (Netbios), and 445 (SMB) enabling full remote access from outside the network.

T1573Encrypted ChannelEvidence1

The content repeatedly describes malware and threat actors using SSL, TLS, HTTPS, RSA, AES, Blowfish, RC4, ECIES, Diffie-Hellman, OpenSSL, WolfSSL, and mutual TLS to protect command and control traffic.

Exfiltration

3 techniques
T1041Exfiltration Over C2 ChannelEvidence2

ADVSTORESHELL exfiltrates data over the same channel used for C2... Agrius exfiltrated staged data using tools such as Putty and WinSCP, communicating with command and control servers... numerous malware and groups sent victim data, files, credentials, or host information over existing C2 channels.

T1048.001Exfiltration Over Symmetric Encrypted Non-C2 ProtocolEvidence1

During C0033, PROMETHIUM used StrongPity to exfiltrate to the C2 server using HTTPS.

T1048.003Exfiltration Over Unencrypted Non-C2 ProtocolEvidence1

BRATA has exfiltrated data to the C2 server using HTTP requests.

Other

2 techniques
T1562Impair DefensesEvidence3

"Play has used Base64-encoded PowerShell scripts to disable Microsoft Defender," "StrongPity can use PowerShell to add files to the Windows Defender exclusions list," and "ZeroCleare can use a malicious PowerShell script to bypass Windows controls."

T1562.006Indicator BlockingEvidence1

BlackByte Ransomware 'adds .JS and .EXE extensions to the Microsoft Defender exclusion list'; PureCrypter 'executed Set-MpPreference -ExclusionPath'; QakBot 'modify the Registry to add its binaries to the Windows Defender exclusion list'; Raspberry Robin 'add an exception to Microsoft Defender that excludes the entire main drive'; StrongPity 'add directories used by the malware to the Windows Defender exclusions list'; XLoader 'can add the path of its executable to the Microsoft Defender exclusion list'; ZIPLINE 'can add itself to the exclusion list for the Ivanti Connect Secure Integrity Checker Tool.'

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Exploited vulnerabilities

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Detection signatures

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MITRE ATT&CK mapping25

Every documented technique, ranked by evidence weight.

Researcher chatter

Reddit, Mastodon, and CTI community discussion around this family.