Analysis
- max time kernel
147s - max time network
147s - platform
windows10-2004_x64 - resource
win10v2004-20230703-en - resource tags
- submitted
08/08/2023, 01:29
General
- Target 65c06c0404ce69f08491b0f868e0b635.exe
- Size 45KB
- Sample230808-bv85sabe9x
- SHA256 ea04850fa21b0c32d74e4f6dfd09540efb4674cb64e6836b4842d8a7e6ae587a
Malware Config
Extracted
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asyncrat
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0.5.7B
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Default
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127.0.0.1:6606
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127.0.0.1:7707
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127.0.0.1:8808
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AsyncMutex_6SI8OkPnk
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delay
3
-
install
true
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install_file
UpdateHost.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
- 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 2 IoCs
- Suspicious use of WriteProcessMemory 15 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\65c06c0404ce69f08491b0f868e0b635.exe"C:\Users\Admin\AppData\Local\Temp\65c06c0404ce69f08491b0f868e0b635.exe"1⤵
- 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 "UpdateHost" /tr '"C:\Users\Admin\AppData\Roaming\UpdateHost.exe"' & exit2⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\schtasks.exeschtasks /create /f /sc onlogon /rl highest /tn "UpdateHost" /tr '"C:\Users\Admin\AppData\Roaming\UpdateHost.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\tmp780E.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\UpdateHost.exe"C:\Users\Admin\AppData\Roaming\UpdateHost.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
tmp780E.tmp.bat
UpdateHost.exe
UpdateHost.exe
memory/3180-133-0x0000000000070000-0x0000000000082000-memory.dmp
memory/3180-134-0x0000000074C00000-0x00000000753B0000-memory.dmp
memory/3180-135-0x0000000004880000-0x0000000004890000-memory.dmp
memory/3180-136-0x0000000004A30000-0x0000000004ACC000-memory.dmp
memory/3180-142-0x0000000074C00000-0x00000000753B0000-memory.dmp
memory/3764-146-0x0000000074C00000-0x00000000753B0000-memory.dmp
memory/3764-147-0x00000000059F0000-0x0000000005A00000-memory.dmp
memory/3764-148-0x0000000074C00000-0x00000000753B0000-memory.dmp
memory/3764-149-0x00000000059F0000-0x0000000005A00000-memory.dmp