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MalwareRansomwareUsed by 2 actorsExploits 3 CVEs

Abyss Worker

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Mallory pivots from this family to the IOCs, detections, and named campaigns that touch your stack, and pages you when something new lands.

EXPLOITED CVES

Vulnerabilities exploited

3 CVEs Mallory has correlated with this family across public research and vendor advisories. Each row links to the full Mallory page for that vulnerability.

3 CVES
CVE-2023-52271Arbitrary PPL Process Termination in Topaz Antifraud wsftprm.sysExploited in the wild

Additional drivers linked to CVE-2023-52271, CVE-2025-61155, and CVE-2025-1055 were also abused.

via cyber security newscybersecuritynews.com
CVE-2025-61155Arbitrary Process Termination via GameDriverX64.sys IOCTL Access Control FlawExploited in the wild

Additional drivers linked to CVE-2023-52271, CVE-2025-61155, and CVE-2025-1055 were also abused.

via cyber security newscybersecuritynews.com
CVE-2025-1055Improper Access Control in K7 Security K7RKScan.sys IOCTL HandlerExploited in the wild

Additional drivers linked to CVE-2023-52271, CVE-2025-61155, and CVE-2025-1055 were also abused.

via cyber security newscybersecuritynews.com
THREAT ACTORS

Groups observed using it

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

View more details
DragonForce

The attackers further deployed a custom malicious driver, Abyss Worker, disguised as a legitimate Palo Alto driver, to terminate security processes.

via cyber security newscybersecuritynews.com
Hackledorb

The attackers further deployed a custom malicious driver, Abyss Worker, disguised as a legitimate Palo Alto driver, to terminate security processes.

via cyber security newscybersecuritynews.com
MITRE ATT&CK

Techniques & procedures

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

Privilege Escalation

1 technique
T1548Abuse Elevation Control MechanismEvidence1

Notably, Symantec researchers observed a novel exploitation of the Huawei driver HWAuidoOs2Ec.sys, described as a “Havoc Process Terminator.” Additional drivers linked to CVE-2023-52271, CVE-2025-61155, and CVE-2025-1055 were also abused.

Other

1 technique
T1562Impair DefensesEvidence1

The attackers used a Bring Your Own Vulnerable Driver (BYOVD) technique to turn off security tools at the kernel level.

What this page doesn’t show

The version that knows your environment.

This page is what’s public. Mallory adds the parts that aren’t: which of your assets match these IOCs, which detections are missing, which campaigns to expect next, and what to do in the next 30 minutes.
IOC matching

Match every observed IP, domain, and hash against your live telemetry.

Threat actor attribution2

Named campaigns wielding this family, with evidence pinned to each claim.

Exploited vulnerabilities3

CVEs this family uses for access and lateral movement.

Detection signatures

YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.

MITRE ATT&CK mapping2

Every documented technique, ranked by evidence weight.

Researcher chatter

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