General
- Target IRS_Form_8879.vbs
- Size 14.4MB
- Sample260810-vr4wfahe22
- SHA256 752cae85cdf4227ff78f69bb905dca965b673d3a37df6970096d447fa842010a
- MD5 8ecdd758682196bb21cb17dfd2aff0e5
- SHA1 ef3024dc12d493ad5da34e99176aa52d3a45c3a0
- SHA512 2788dffccb99b7dd23127032d4c9688c7ad4a1667285e67341829e7f3a90a32415220c011c3289e2cc6686a4be1119805ff65d1c944dae72c14bdd78c0d4367e
- SSDEEP 49152:J2L+4DT4y3ExlTRxY3UQnE261ZYybwKcj3DHUVgMkpz2yBxQd4Y6QrlYLVluHr+w:H
- TLSH T17FE6D7243DFF501DB3B3AE999FD8B8AF995EF673270A20B9206103468712D81DD91739
- MD5 SHA1 SHA512 SSDEEP TLSH
Static task
static1
Behavioral task
behavioral1
Sample
IRS_Form_8879.vbs
Resource
win10v2004-20260513-en
Behavioral task
behavioral2
Sample
IRS_Form_8879.vbs
Resource
win11ltsc2024-20260709-en
Malware Config
Targets
-
- Target IRS_Form_8879.vbs
- Size 14.4MB
- SHA256 752cae85cdf4227ff78f69bb905dca965b673d3a37df6970096d447fa842010a
- MD5 8ecdd758682196bb21cb17dfd2aff0e5
- SHA1 ef3024dc12d493ad5da34e99176aa52d3a45c3a0
- SHA512 2788dffccb99b7dd23127032d4c9688c7ad4a1667285e67341829e7f3a90a32415220c011c3289e2cc6686a4be1119805ff65d1c944dae72c14bdd78c0d4367e
- SSDEEP 49152:J2L+4DT4y3ExlTRxY3UQnE261ZYybwKcj3DHUVgMkpz2yBxQd4Y6QrlYLVluHr+w:H
- TLSH T17FE6D7243DFF501DB3B3AE999FD8B8AF995EF673270A20B9206103468712D81DD91739
- MD5 SHA1 SHA512 SSDEEP TLSH
-
Sets service image path in registry
This determines the executable launched when a service starts. It can be used to establish persistence.
-
Signed with revoked ConnectWise certificate
Binary is signed using a ConnectWise certificate revoked for key compromise.
-
Checks computer location settings
Looks up country code configured in the registry, likely geofence.
-
Event Triggered Execution: Component Object Model Hijacking
Adversaries may establish persistence by executing malicious content triggered by hijacked references to Component Object Model (COM) objects.
-
Executes dropped EXE
-
Loads dropped DLL
-
Enumerates connected drives
Attempts to read the root path of hard drives other than the default C: drive.
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Boot or Logon Autostart Execution: Authentication Package
Suspicious Windows Authentication Registry Modification.
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Drops file in System32 directory
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Executes a VBScript file via the Windows Script Host.
MITRE ATT&CK Enterprise v16
Persistence
Boot or Logon Autostart Execution
2Authentication Package
1Registry Run Keys / Startup Folder
1Create or Modify System Process
1Windows Service
1Event Triggered Execution
1Component Object Model Hijacking
1Privilege Escalation
Boot or Logon Autostart Execution
2Authentication Package
1Registry Run Keys / Startup Folder
1Create or Modify System Process
1Windows Service
1Event Triggered Execution
1Component Object Model Hijacking
1