General
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Target
macros.exp
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Size
11B
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Sample
240612-wyrp5avdjd
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MD5
4bc624dceaefa042d85d620a6899f789
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SHA1
80075d4ba26c76a151ae37110a47eacd30bc2c8e
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SHA256
799adf5563cca6365b1290711e311947ed6618e1854d91ae021aa51a5028e6d6
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SHA512
d732882835028d2827caff2f438a5309e032f029b208d03d32dacb2d896f11faba52ee38de3e3c6940f130425c87317f3896144a4f4aaa665285b2ccc30fe0a3
Static task
static1
Behavioral task
behavioral1
Sample
macros.exp
Resource
win10v2004-20240611-en
Malware Config
Extracted
umbral
https://discord.com/api/webhooks/1250512741236609158/IIWgzYIpwZxe9tgX-E05IVAB1SjwpJFSmVUMs2LwPacQi-aTjjeKp_fjFd4vlqkhBq-M
Targets
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Target
macros.exp
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Size
11B
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MD5
4bc624dceaefa042d85d620a6899f789
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SHA1
80075d4ba26c76a151ae37110a47eacd30bc2c8e
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SHA256
799adf5563cca6365b1290711e311947ed6618e1854d91ae021aa51a5028e6d6
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SHA512
d732882835028d2827caff2f438a5309e032f029b208d03d32dacb2d896f11faba52ee38de3e3c6940f130425c87317f3896144a4f4aaa665285b2ccc30fe0a3
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AgentTesla
Agent Tesla is a remote access tool (RAT) written in visual basic.
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Detect Umbral payload
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Modifies WinLogon for persistence
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AgentTesla payload
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Command and Scripting Interpreter: PowerShell
Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.
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Downloads MZ/PE file
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Drops file in Drivers directory
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Modifies AppInit DLL entries
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Checks computer location settings
Looks up country code configured in the registry, likely geofence.
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Executes dropped EXE
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Loads dropped DLL
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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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Legitimate hosting services abused for malware hosting/C2
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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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MITRE ATT&CK Enterprise v15
Persistence
Boot or Logon Autostart Execution
3Registry Run Keys / Startup Folder
2Winlogon Helper DLL
1Scheduled Task/Job
1Privilege Escalation
Boot or Logon Autostart Execution
3Registry Run Keys / Startup Folder
2Winlogon Helper DLL
1Scheduled Task/Job
1Defense Evasion
Hide Artifacts
1Hidden Files and Directories
1Modify Registry
4