Analysis
- max time kernel
145s - max time network
155s - platform
windows10-2004_x64 - resource
win10v2004-20240709-en - resource tags
- submitted
16/07/2024, 16:49
General
- Target 4f35ac873a97230c69a50bc06fd750a9_JaffaCakes118.exe
- Size 36KB
- Sample240716-vbr7psvbld
- SHA256 7f92427f427dcc9c8746f252d895e938107e94d6432028d7d4beae5523b56c8e
Malware Config
Extracted
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asyncrat
-
0.5.7B
-
Default
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justrandomhost.duckdns.org:1604
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AsyncMutex_6SI8OkPnk
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delay
3
-
install
true
-
install_file
svchost.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 1 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 3 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- Delays execution with timeout.exe 1 IoCs
- Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
- Suspicious behavior: EnumeratesProcesses 21 IoCs
- Suspicious use of AdjustPrivilegeToken 3 IoCs
- Suspicious use of WriteProcessMemory 15 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\4f35ac873a97230c69a50bc06fd750a9_JaffaCakes118.exe"C:\Users\Admin\AppData\Local\Temp\4f35ac873a97230c69a50bc06fd750a9_JaffaCakes118.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 "svchost" /tr '"C:\Users\Admin\AppData\Roaming\svchost.exe"' & exit2⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\schtasks.exeschtasks /create /f /sc onlogon /rl highest /tn "svchost" /tr '"C:\Users\Admin\AppData\Roaming\svchost.exe"'3⤵
- Scheduled Task/Job: Scheduled Task
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-
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C:\Windows\SysWOW64\cmd.exeC:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpCC97.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\svchost.exe"C:\Users\Admin\AppData\Roaming\svchost.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
tmpCC97.tmp.bat
svchost.exe
memory/5328-6-0x0000000074820000-0x0000000074FD0000-memory.dmp
memory/5328-3-0x0000000005810000-0x00000000058A2000-memory.dmp
memory/5328-4-0x00000000058B0000-0x000000000594C000-memory.dmp
memory/5328-5-0x00000000057D0000-0x00000000057DA000-memory.dmp
memory/5328-0-0x000000007482E000-0x000000007482F000-memory.dmp
memory/5328-7-0x0000000005C70000-0x0000000005C82000-memory.dmp
memory/5328-8-0x0000000006DC0000-0x0000000006E26000-memory.dmp
memory/5328-13-0x0000000074820000-0x0000000074FD0000-memory.dmp
memory/5328-2-0x0000000005DC0000-0x0000000006364000-memory.dmp
memory/5328-1-0x0000000000E20000-0x0000000000E30000-memory.dmp
memory/5732-18-0x0000000074820000-0x0000000074FD0000-memory.dmp
memory/5732-19-0x0000000074820000-0x0000000074FD0000-memory.dmp