Analysis
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max time kernel
122s -
max time network
152s -
platform
windows7_x64 -
resource
win7-20240508-en -
resource tags
arch:x64arch:x86image:win7-20240508-enlocale:en-usos:windows7-x64system -
submitted
25-05-2024 13:52
Behavioral task
behavioral1
Sample
start.exe
Resource
win7-20240508-en
Behavioral task
behavioral2
Sample
start.exe
Resource
win10v2004-20240226-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 \Users\Admin\AppData\Roaming\svchos.exe family_asyncrat -
Executes dropped EXE 1 IoCs
Processes:
svchos.exepid process 2700 svchos.exe -
Loads dropped DLL 1 IoCs
Processes:
cmd.exepid process 1648 cmd.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 2172 timeout.exe -
Suspicious behavior: EnumeratesProcesses 3 IoCs
Processes:
start.exesvchos.exepid process 2420 start.exe 2420 start.exe 2700 svchos.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
Processes:
start.exesvchos.exedescription pid process Token: SeDebugPrivilege 2420 start.exe Token: SeDebugPrivilege 2700 svchos.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
Processes:
svchos.exepid process 2700 svchos.exe -
Suspicious use of WriteProcessMemory 20 IoCs
Processes:
start.execmd.execmd.exedescription pid process target process PID 2420 wrote to memory of 2376 2420 start.exe cmd.exe PID 2420 wrote to memory of 2376 2420 start.exe cmd.exe PID 2420 wrote to memory of 2376 2420 start.exe cmd.exe PID 2420 wrote to memory of 2376 2420 start.exe cmd.exe PID 2420 wrote to memory of 1648 2420 start.exe cmd.exe PID 2420 wrote to memory of 1648 2420 start.exe cmd.exe PID 2420 wrote to memory of 1648 2420 start.exe cmd.exe PID 2420 wrote to memory of 1648 2420 start.exe cmd.exe PID 2376 wrote to memory of 3036 2376 cmd.exe schtasks.exe PID 2376 wrote to memory of 3036 2376 cmd.exe schtasks.exe PID 2376 wrote to memory of 3036 2376 cmd.exe schtasks.exe PID 2376 wrote to memory of 3036 2376 cmd.exe schtasks.exe PID 1648 wrote to memory of 2172 1648 cmd.exe timeout.exe PID 1648 wrote to memory of 2172 1648 cmd.exe timeout.exe PID 1648 wrote to memory of 2172 1648 cmd.exe timeout.exe PID 1648 wrote to memory of 2172 1648 cmd.exe timeout.exe PID 1648 wrote to memory of 2700 1648 cmd.exe svchos.exe PID 1648 wrote to memory of 2700 1648 cmd.exe svchos.exe PID 1648 wrote to memory of 2700 1648 cmd.exe svchos.exe PID 1648 wrote to memory of 2700 1648 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⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2420 -
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:2376 -
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:3036 -
C:\Windows\SysWOW64\cmd.execmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp2D76.tmp.bat""2⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1648 -
C:\Windows\SysWOW64\timeout.exetimeout 33⤵
- Delays execution with timeout.exe
PID:2172 -
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:2700
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
68KB
MD529f65ba8e88c063813cc50a4ea544e93
SHA105a7040d5c127e68c25d81cc51271ffb8bef3568
SHA2561ed81fa8dfb6999a9fedc6e779138ffd99568992e22d300acd181a6d2c8de184
SHA512e29b2e92c496245bed3372578074407e8ef8882906ce10c35b3c8deebfefe01b5fd7f3030acaa693e175f4b7aca6cd7d8d10ae1c731b09c5fa19035e005de3aa
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Filesize
150B
MD5f3a56aa3ab458f16495e6d045226f417
SHA1e215b3d4bbc7cd9a384483566573a76a18af2058
SHA256062ed979eb77ebdb373a7ff1640b6fa91e5a68460a53359c755dc18724e950a0
SHA512bdba89d13cb56033e8817df81d6c99b69b6783e3a13841db0ba8806bde70b5ad6377f48f2f2d6ec500abbc77204205389dfdeecb2af11c25143b7a91b145ae27
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Filesize
63KB
MD5c1ade258f05c512e98ebc4d9d1165f8a
SHA1acf20f6a7dc7841ae06f801b887289fdc99e0488
SHA256447eae52ab1979405497866c72df7ec0703085ad6946ab0127f612b1518f8759
SHA5125b652e0ef6293d7baeb7e9d8b79322ec65e98d748e1df492099fa6692d0bbc78f032df68e7028a28af06b5c27394456159351a6469fdaf777e6eb98609331076