Analysis
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max time kernel
147s -
max time network
155s -
platform
windows10-2004_x64 -
resource
win10v2004-20240426-en -
resource tags
arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system -
submitted
25-05-2024 13:52
Behavioral task
behavioral1
Sample
start.exe
Resource
win7-20240220-en
Behavioral task
behavioral2
Sample
start.exe
Resource
win10v2004-20240426-en
General
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Target
start.exe
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Size
63KB
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MD5
c1ade258f05c512e98ebc4d9d1165f8a
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SHA1
acf20f6a7dc7841ae06f801b887289fdc99e0488
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SHA256
447eae52ab1979405497866c72df7ec0703085ad6946ab0127f612b1518f8759
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SHA512
5b652e0ef6293d7baeb7e9d8b79322ec65e98d748e1df492099fa6692d0bbc78f032df68e7028a28af06b5c27394456159351a6469fdaf777e6eb98609331076
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SSDEEP
1536:SaKFoNbEkySYKumUYFOy5biAPY0JG4aRjnl7RUr+TG5x:SawoNbEkAKumUYFD5biF0JejxSsCx
Malware Config
Extracted
asyncrat
| Edit 3LOSH RAT
Exodus_Market
leetboy.dynuddns.net:1339
AsyncMutex_6SI8OkPnk
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delay
3
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install
true
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install_file
svchos.exe
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install_folder
%AppData%
Signatures
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Async RAT payload 1 IoCs
Processes:
resource yara_rule C:\Users\Admin\AppData\Roaming\svchos.exe family_asyncrat -
Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
Processes:
start.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-540404634-651139247-2967210625-1000\Control Panel\International\Geo\Nation start.exe -
Executes dropped EXE 1 IoCs
Processes:
svchos.exepid process 3016 svchos.exe -
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
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Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
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Delays execution with timeout.exe 1 IoCs
Processes:
timeout.exepid process 2060 timeout.exe -
Suspicious behavior: EnumeratesProcesses 22 IoCs
Processes:
start.exesvchos.exepid process 4720 start.exe 4720 start.exe 4720 start.exe 4720 start.exe 4720 start.exe 4720 start.exe 4720 start.exe 4720 start.exe 4720 start.exe 4720 start.exe 4720 start.exe 4720 start.exe 4720 start.exe 4720 start.exe 4720 start.exe 4720 start.exe 4720 start.exe 4720 start.exe 4720 start.exe 4720 start.exe 4720 start.exe 3016 svchos.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
Processes:
start.exesvchos.exedescription pid process Token: SeDebugPrivilege 4720 start.exe Token: SeDebugPrivilege 3016 svchos.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
Processes:
svchos.exepid process 3016 svchos.exe -
Suspicious use of WriteProcessMemory 15 IoCs
Processes:
start.execmd.execmd.exedescription pid process target process PID 4720 wrote to memory of 1380 4720 start.exe cmd.exe PID 4720 wrote to memory of 1380 4720 start.exe cmd.exe PID 4720 wrote to memory of 1380 4720 start.exe cmd.exe PID 4720 wrote to memory of 4000 4720 start.exe cmd.exe PID 4720 wrote to memory of 4000 4720 start.exe cmd.exe PID 4720 wrote to memory of 4000 4720 start.exe cmd.exe PID 4000 wrote to memory of 2060 4000 cmd.exe timeout.exe PID 4000 wrote to memory of 2060 4000 cmd.exe timeout.exe PID 4000 wrote to memory of 2060 4000 cmd.exe timeout.exe PID 1380 wrote to memory of 1408 1380 cmd.exe schtasks.exe PID 1380 wrote to memory of 1408 1380 cmd.exe schtasks.exe PID 1380 wrote to memory of 1408 1380 cmd.exe schtasks.exe PID 4000 wrote to memory of 3016 4000 cmd.exe svchos.exe PID 4000 wrote to memory of 3016 4000 cmd.exe svchos.exe PID 4000 wrote to memory of 3016 4000 cmd.exe svchos.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\start.exe"C:\Users\Admin\AppData\Local\Temp\start.exe"1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4720 -
C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "svchos" /tr '"C:\Users\Admin\AppData\Roaming\svchos.exe"' & exit2⤵
- Suspicious use of WriteProcessMemory
PID:1380 -
C:\Windows\SysWOW64\schtasks.exeschtasks /create /f /sc onlogon /rl highest /tn "svchos" /tr '"C:\Users\Admin\AppData\Roaming\svchos.exe"'3⤵
- Creates scheduled task(s)
PID:1408 -
C:\Windows\SysWOW64\cmd.exeC:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp5CB6.tmp.bat""2⤵
- Suspicious use of WriteProcessMemory
PID:4000 -
C:\Windows\SysWOW64\timeout.exetimeout 33⤵
- Delays execution with timeout.exe
PID:2060 -
C:\Users\Admin\AppData\Roaming\svchos.exe"C:\Users\Admin\AppData\Roaming\svchos.exe"3⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
PID:3016
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
150B
MD5712a5eac516d3a1dcd94a3a7ef1a1ada
SHA1b1e43d3dba3e40896a7bfa61baf1b0f2890725fc
SHA256c7094e9abc0e0539be3bc5b3ba61a0e1d99b4a29f62b43128f79b1f63bb8b510
SHA512f007259420057b9f8db6a8e2b4383d656a691b41e7b6cd51f68b439c9adbadc92675f19a8e215431f4ccef93a8276ac8d09c6cb3740643345017e8235c1d7343
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Filesize
63KB
MD5c1ade258f05c512e98ebc4d9d1165f8a
SHA1acf20f6a7dc7841ae06f801b887289fdc99e0488
SHA256447eae52ab1979405497866c72df7ec0703085ad6946ab0127f612b1518f8759
SHA5125b652e0ef6293d7baeb7e9d8b79322ec65e98d748e1df492099fa6692d0bbc78f032df68e7028a28af06b5c27394456159351a6469fdaf777e6eb98609331076