Analysis
- max time kernel
141s - max time network
152s - platform
windows10-2004_x64 - resource
win10v2004-20230703-en - resource tags
- submitted
28/07/2023, 16:58
General
- Target a716a71126549bf1d872da_JC.exe
- Size 112KB
- Sample230728-vgtmqaee32
- SHA256 a716a71126549bf1d872da1f82a28c965678e833aa0470121d3144e7c33f715f
Malware Config
Extracted
-
asyncrat
-
0.5.7B
-
Default
-
127.0.0.1:6606
-
127.0.0.1:7707
-
127.0.0.1:8808
-
127.0.0.1:5505
-
147.50.253.108:6606
-
147.50.253.108:7707
-
147.50.253.108:8808
-
147.50.253.108:5505
-
AsyncMutex_6SI8OkPnk
-
delay
3
-
install
true
-
install_file
botchatline.exe
-
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
- 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 3 IoCs
- Suspicious use of WriteProcessMemory 15 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\a716a71126549bf1d872da_JC.exe"C:\Users\Admin\AppData\Local\Temp\a716a71126549bf1d872da_JC.exe"1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "botchatline" /tr '"C:\Users\Admin\AppData\Roaming\botchatline.exe"' & exit2⤵
- Suspicious use of WriteProcessMemory
-
C:\Windows\SysWOW64\schtasks.exeschtasks /create /f /sc onlogon /rl highest /tn "botchatline" /tr '"C:\Users\Admin\AppData\Roaming\botchatline.exe"'3⤵
- Creates scheduled task(s)
-
-
-
C:\Windows\SysWOW64\cmd.exeC:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp98E4.tmp.bat""2⤵
- Suspicious use of WriteProcessMemory
-
C:\Windows\SysWOW64\timeout.exetimeout 33⤵
- Delays execution with timeout.exe
-
-
C:\Users\Admin\AppData\Roaming\botchatline.exe"C:\Users\Admin\AppData\Roaming\botchatline.exe"3⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
-
-
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
tmp98E4.tmp.bat
botchatline.exe
botchatline.exe
memory/1780-153-0x00000000065C0000-0x0000000006B64000-memory.dmp
memory/1780-150-0x0000000005300000-0x0000000005310000-memory.dmp
memory/1780-149-0x0000000075290000-0x0000000075A40000-memory.dmp
memory/1780-148-0x0000000005300000-0x0000000005310000-memory.dmp
memory/1780-147-0x0000000075290000-0x0000000075A40000-memory.dmp
memory/4028-136-0x0000000005970000-0x00000000059D6000-memory.dmp
memory/4028-143-0x0000000075330000-0x0000000075AE0000-memory.dmp
memory/4028-137-0x00000000060E0000-0x000000000617C000-memory.dmp
memory/4028-133-0x0000000000F80000-0x0000000000FA2000-memory.dmp
memory/4028-135-0x00000000059F0000-0x0000000005A00000-memory.dmp
memory/4028-134-0x0000000075330000-0x0000000075AE0000-memory.dmp