Analysis
- max time kernel
36s - max time network
163s - platform
windows10-2004_x64 - resource
win10v2004-20240226-en - resource tags
- submitted
17/04/2024, 01:34
General
- Target 61e869da1d5cefe780a706e06b904c276d8393e618de382c3b4abdbb4d817222.exe
- Size 46.7MB
- Sample240417-by33yabe4t
- SHA256 61e869da1d5cefe780a706e06b904c276d8393e618de382c3b4abdbb4d817222
Malware Config
Extracted
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asyncrat
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0.5.6A
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dgorijan20785.hopto.org:6606
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dgorijan20785.hopto.org:7707
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dgorijan20785.hopto.org:8808
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v5tvc4rc3ex788
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delay
10
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install
true
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install_file
audiodrv.exe
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install_folder
%AppData%
Signatures
- AsyncRat
AsyncRAT is designed to remotely monitor and control other computers written in C#.
- Detects file containing reversed ASEP Autorun registry keys 1 IoCs
- Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
- 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 24 IoCs
- Suspicious use of AdjustPrivilegeToken 1 IoCs
- Suspicious use of WriteProcessMemory 6 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\61e869da1d5cefe780a706e06b904c276d8393e618de382c3b4abdbb4d817222.exe"C:\Users\Admin\AppData\Local\Temp\61e869da1d5cefe780a706e06b904c276d8393e618de382c3b4abdbb4d817222.exe"1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\System32\schtasks.exe"C:\Windows\System32\schtasks.exe" /create /f /sc ONLOGON /RL HIGHEST /tn "'audiodrv"' /tr "'C:\Users\Admin\AppData\Roaming\audiodrv.exe"'2⤵
- Creates scheduled task(s)
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C:\Windows\system32\cmd.exeC:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp83C1.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\audiodrv.exe"C:\Users\Admin\AppData\Roaming\audiodrv.exe"3⤵
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C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=3924 --field-trial-handle=2692,i,8678872182442199182,12502579059484928042,262144 --variations-seed-version /prefetch:81⤵
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
tmp83C1.tmp.bat
audiodrv.exe
audiodrv.exe
memory/1552-13-0x00007FF8A2360000-0x00007FF8A2E21000-memory.dmp
memory/1552-14-0x0000000001480000-0x0000000001490000-memory.dmp
memory/1552-15-0x00007FF8A2360000-0x00007FF8A2E21000-memory.dmp
memory/1552-16-0x0000000001480000-0x0000000001490000-memory.dmp
memory/4964-0-0x0000000000640000-0x0000000000652000-memory.dmp
memory/4964-1-0x00007FF8A2360000-0x00007FF8A2E21000-memory.dmp
memory/4964-2-0x000000001B2C0000-0x000000001B2D0000-memory.dmp
memory/4964-3-0x00007FF8A2360000-0x00007FF8A2E21000-memory.dmp
memory/4964-9-0x00007FF8A2360000-0x00007FF8A2E21000-memory.dmp