Analysis
- max time kernel
150s - max time network
155s - platform
windows10-2004_x64 - resource
win10v2004-20231127-en - resource tags
- submitted
10/12/2023, 02:55
General
- Target 6ee6d4838351d067fcef0272a0df3716.exe
- Size 45KB
- Sample231210-dek45adcb6
- SHA256 daede472075795596b6e1e46ad45c53e106d1ebb03c6394bc47eea22ca3beb31
Malware Config
Extracted
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asyncrat
-
0.5.8
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Default
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2.tcp.eu.ngrok.io:17442
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nxJazkJ78KXf
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delay
3
-
install
true
-
install_file
GUP.exe
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install_folder
%AppData%
Signatures
- AsyncRat
AsyncRAT is designed to remotely monitor and control other computers written in C#.
- Async RAT payload 3 IoCs
- Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
- Executes dropped EXE 1 IoCs
- Legitimate hosting services abused for malware hosting/C2 1 TTPs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
- Delays execution with timeout.exe 1 IoCs
- Suspicious behavior: EnumeratesProcesses 23 IoCs
- Suspicious use of AdjustPrivilegeToken 2 IoCs
- Suspicious use of WriteProcessMemory 15 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\6ee6d4838351d067fcef0272a0df3716.exe"C:\Users\Admin\AppData\Local\Temp\6ee6d4838351d067fcef0272a0df3716.exe"1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "GUP" /tr '"C:\Users\Admin\AppData\Roaming\GUP.exe"' & exit2⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\schtasks.exeschtasks /create /f /sc onlogon /rl highest /tn "GUP" /tr '"C:\Users\Admin\AppData\Roaming\GUP.exe"'3⤵
- Creates scheduled task(s)
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C:\Windows\SysWOW64\cmd.exeC:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp20E.tmp.bat""2⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\timeout.exetimeout 33⤵
- Delays execution with timeout.exe
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C:\Users\Admin\AppData\Roaming\GUP.exe"C:\Users\Admin\AppData\Roaming\GUP.exe"3⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
tmp20E.tmp.bat
GUP.exe
GUP.exe
memory/3336-13-0x0000000074710000-0x0000000074EC0000-memory.dmp
memory/3336-14-0x00000000050B0000-0x00000000050C0000-memory.dmp
memory/3336-15-0x0000000074710000-0x0000000074EC0000-memory.dmp
memory/3336-16-0x00000000050B0000-0x00000000050C0000-memory.dmp
memory/4552-0-0x00000000747B0000-0x0000000074F60000-memory.dmp
memory/4552-1-0x0000000000730000-0x0000000000742000-memory.dmp
memory/4552-2-0x0000000002AF0000-0x0000000002B00000-memory.dmp
memory/4552-3-0x0000000005210000-0x00000000052AC000-memory.dmp
memory/4552-9-0x00000000747B0000-0x0000000074F60000-memory.dmp