General
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Target
SubZero_Tweaking.exe
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Size
856KB
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Sample
231007-sfwpksdd8t
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MD5
fc637380cbf974be1adb44a6a5bd1376
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SHA1
fa0a8695c49497824a203a1bc0aadbb09acdec01
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SHA256
3e032a34d67f6f9f46be4359ce624d3a4d9af64aab2b17d872e8b56bee2edacf
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SHA512
3b7b394c7e2a2389bf59e1e3d3adaa408fd3ca19bc903a35036d7fece719ebc1ddeaaeef28c1c18027ca9607f2570637a59e5e97ece0df2c5da48b29c12b2493
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SSDEEP
12288:LOm2t4WwFJM6cLeXAdv/x66v/wY1K8Zsnq2uZ0hQkP2ypcCHrHL3UJlqWWRuK9ow:64fcL//I6v4Y1Zu52y9/EGWWv9ohS
Static task
static1
Behavioral task
behavioral1
Sample
SubZero_Tweaking.exe
Resource
win10v2004-20230915-en
Malware Config
Targets
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Target
SubZero_Tweaking.exe
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Size
856KB
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MD5
fc637380cbf974be1adb44a6a5bd1376
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SHA1
fa0a8695c49497824a203a1bc0aadbb09acdec01
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SHA256
3e032a34d67f6f9f46be4359ce624d3a4d9af64aab2b17d872e8b56bee2edacf
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SHA512
3b7b394c7e2a2389bf59e1e3d3adaa408fd3ca19bc903a35036d7fece719ebc1ddeaaeef28c1c18027ca9607f2570637a59e5e97ece0df2c5da48b29c12b2493
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SSDEEP
12288:LOm2t4WwFJM6cLeXAdv/x66v/wY1K8Zsnq2uZ0hQkP2ypcCHrHL3UJlqWWRuK9ow:64fcL//I6v4Y1Zu52y9/EGWWv9ohS
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Contains code to disable Windows Defender
A .NET executable tasked with disabling Windows Defender capabilities such as realtime monitoring, blocking at first seen, etc.
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Modifies Installed Components in the registry
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Modifies Windows Firewall
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Sets DLL path for service in the registry
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ACProtect 1.3x - 1.4x DLL software
Detects file using ACProtect software.
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Allows Network login with blank passwords
Allows local user accounts with blank passwords to access device from the network.
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Checks computer location settings
Looks up country code configured in the registry, likely geofence.
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Drops startup file
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Executes dropped EXE
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Loads dropped DLL
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Uses the VBS compiler for execution
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Accesses Microsoft Outlook accounts
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Adds Run key to start application
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Drops desktop.ini file(s)
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Enumerates connected drives
Attempts to read the root path of hard drives other than the default C: drive.
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Looks up external IP address via web service
Uses a legitimate IP lookup service to find the infected system's external IP.
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Modifies WinLogon
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Drops file in System32 directory
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Sets desktop wallpaper using registry
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Suspicious use of SetThreadContext
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MITRE ATT&CK Enterprise v15
Persistence
Boot or Logon Autostart Execution
4Registry Run Keys / Startup Folder
3Winlogon Helper DLL
1Create or Modify System Process
2Windows Service
2Scheduled Task/Job
1Privilege Escalation
Abuse Elevation Control Mechanism
1Bypass User Account Control
1Boot or Logon Autostart Execution
4Registry Run Keys / Startup Folder
3Winlogon Helper DLL
1Create or Modify System Process
2Windows Service
2Scheduled Task/Job
1Defense Evasion
Abuse Elevation Control Mechanism
1Bypass User Account Control
1Impair Defenses
2Disable or Modify Tools
2Modify Registry
11Scripting
1Subvert Trust Controls
1Install Root Certificate
1