Analysis
- max time kernel
148s - max time network
150s - platform
windows10-2004_x64 - resource
win10v2004-20240508-en - resource tags
- submitted
26/05/2024, 00:24
General
- Target Infected.exe
- Size 63KB
- Sample240526-ap998agf44
- SHA256 2eb914fb9a98ac7253618469a7a84c2435412e14fba4807115ec41bb91212a3b
Malware Config
Extracted
-
asyncrat
-
Default
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127.0.0.1:3232
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ilovabby.ddns.net:3232
-
delay
2
-
install
true
-
install_file
windowsupdater.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
- 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 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\Infected.exe"C:\Users\Admin\AppData\Local\Temp\Infected.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 "windowsupdater" /tr '"C:\Users\Admin\AppData\Roaming\windowsupdater.exe"' & exit2⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\system32\schtasks.exeschtasks /create /f /sc onlogon /rl highest /tn "windowsupdater" /tr '"C:\Users\Admin\AppData\Roaming\windowsupdater.exe"'3⤵
- Creates scheduled task(s)
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-
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C:\Windows\system32\cmd.exeC:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp5285.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\windowsupdater.exe"C:\Users\Admin\AppData\Roaming\windowsupdater.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
tmp5285.tmp.bat
windowsupdater.exe
memory/3240-0-0x00000000009B0000-0x00000000009C6000-memory.dmp
memory/3240-1-0x00007FFA2B193000-0x00007FFA2B195000-memory.dmp
memory/3240-2-0x00007FFA2B190000-0x00007FFA2BC51000-memory.dmp
memory/3240-7-0x00007FFA2B190000-0x00007FFA2BC51000-memory.dmp