Resubmissions
11/02/2026, 21:42
260211-1kalxabs3c303/09/2024, 13:58
240903-q9w64azdke1002/09/2024, 15:07
240902-shlbmatfkg10Analysis
- max time kernel
149s - max time network
151s - platform
windows10-2004_x64 - resource
win10v2004-20240802-en - resource tags
- submitted
02/09/2024, 15:07
General
- Target OsussistInstaller.exe
- Size 1.6MB
- Sample240902-shlbmatfkg
- SHA256 a914feb849114b198f068f0309172defadabc8aa5042dadc41ef7b095771f7d5
Malware Config
Signatures
- AgentTesla
Agent Tesla is a remote access tool (RAT) written in visual basic.
- AgentTesla payload 1 IoCs
- Downloads MZ/PE file
- Drops file in Windows directory 2 IoCs
- System Location Discovery: System Language Discovery 1 TTPs 2 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
- Enumerates system info in registry 2 TTPs 3 IoCs
- Suspicious use of AdjustPrivilegeToken 1 IoCs
- Suspicious use of WriteProcessMemory 3 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\OsussistInstaller.exe"C:\Users\Admin\AppData\Local\Temp\OsussistInstaller.exe"1⤵
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Enumerates system info in registry
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Windows\SysWOW64\reg.exe"reg" add "HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Fonts" /v "comfortaa (TrueType)" /t REG_SZ /d "comfortaa.ttf" /f2⤵
- System Location Discovery: System Language Discovery
-
-
C:\Windows\System32\rundll32.exeC:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding1⤵
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
comfortaa.ttf
memory/2348-19-0x0000000007890000-0x0000000007942000-memory.dmp
memory/2348-22-0x0000000008D80000-0x00000000090D4000-memory.dmp
memory/2348-3-0x00000000052C0000-0x0000000005352000-memory.dmp
memory/2348-4-0x0000000075370000-0x0000000075B20000-memory.dmp
memory/2348-1-0x00000000006D0000-0x000000000086C000-memory.dmp
memory/2348-11-0x00000000064B0000-0x00000000064BA000-memory.dmp
memory/2348-2-0x0000000005870000-0x0000000005E14000-memory.dmp
memory/2348-20-0x0000000075370000-0x0000000075B20000-memory.dmp
memory/2348-12-0x00000000067A0000-0x00000000069B2000-memory.dmp
memory/2348-21-0x0000000008D50000-0x0000000008D72000-memory.dmp
memory/2348-0-0x000000007537E000-0x000000007537F000-memory.dmp
memory/2348-23-0x000000007537E000-0x000000007537F000-memory.dmp
memory/2348-24-0x0000000075370000-0x0000000075B20000-memory.dmp
memory/2348-25-0x0000000075370000-0x0000000075B20000-memory.dmp
memory/2348-31-0x0000000075370000-0x0000000075B20000-memory.dmp