Analysis
- max time kernel
149s - max time network
150s - platform
windows10-2004_x64 - resource
win10v2004-20240412-en - resource tags
- submitted
19/04/2024, 17:40
General
- Target 760d61c1b76f9a909e2e427ed60c7cc76ebb32246b8aec5459d882a04482b1ea.exe
- Size 47KB
- Sample240419-v855tsah94
- SHA256 760d61c1b76f9a909e2e427ed60c7cc76ebb32246b8aec5459d882a04482b1ea
Malware Config
Extracted
-
asyncrat
-
1.0.7
-
Default
-
127.0.0.1:8848
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127.0.0.1:16234
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6.tcp.eu.ngrok.io:8848
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6.tcp.eu.ngrok.io:16234
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DcRatMutex_qwqdanchun
-
delay
1
-
install
true
-
install_file
WindowsDefender.exe
-
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 4 IoCs
- 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 21 IoCs
- Suspicious use of AdjustPrivilegeToken 2 IoCs
- Suspicious use of WriteProcessMemory 10 IoCs
- Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
Processes
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C:\Users\Admin\AppData\Local\Temp\760d61c1b76f9a909e2e427ed60c7cc76ebb32246b8aec5459d882a04482b1ea.exe"C:\Users\Admin\AppData\Local\Temp\760d61c1b76f9a909e2e427ed60c7cc76ebb32246b8aec5459d882a04482b1ea.exe"1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "WindowsDefender" /tr '"C:\Users\Admin\AppData\Roaming\WindowsDefender.exe"' & exit2⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\system32\schtasks.exeschtasks /create /f /sc onlogon /rl highest /tn "WindowsDefender" /tr '"C:\Users\Admin\AppData\Roaming\WindowsDefender.exe"'3⤵
- Creates scheduled task(s)
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C:\Windows\system32\cmd.exeC:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp43CA.tmp.bat""2⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\system32\timeout.exetimeout 33⤵
- Delays execution with timeout.exe
-
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C:\Users\Admin\AppData\Roaming\WindowsDefender.exe"C:\Users\Admin\AppData\Roaming\WindowsDefender.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
tmp43CA.tmp.bat
WindowsDefender.exe
memory/540-12-0x00007FFC5FB90000-0x00007FFC60651000-memory.dmp
memory/540-13-0x000000001B580000-0x000000001B590000-memory.dmp
memory/540-14-0x00007FFC5FB90000-0x00007FFC60651000-memory.dmp
memory/540-15-0x000000001B580000-0x000000001B590000-memory.dmp
memory/1536-0-0x00000000007D0000-0x00000000007E2000-memory.dmp
memory/1536-1-0x00007FFC5FB90000-0x00007FFC60651000-memory.dmp
memory/1536-2-0x0000000002880000-0x0000000002890000-memory.dmp
memory/1536-7-0x00007FFC5FB90000-0x00007FFC60651000-memory.dmp