Analysis
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max time kernel
125s -
max time network
135s -
platform
windows7_x64 -
resource
win7-20240708-en -
resource tags
arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system -
submitted
03-08-2024 05:04
Behavioral task
behavioral1
Sample
Venom.exe
Resource
win7-20240708-en
General
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Target
Venom.exe
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Size
3.1MB
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MD5
1348632fc2ede08cab5db1cb174ff0d3
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SHA1
2a1966291aa0e7aee1b039a1a75fa4879489a2be
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SHA256
900cb76890979aa50347b7b929ef1babd7c677966f642aa4d74cf973136a48bf
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SHA512
52f68303d71f1293b02784539ef3250a95cf9ef4cb868e26e381a86667ab4f5cfc5a36d462ff746dc021bc0420cf8f0b31b050ec4142fb1be4b8f626fae39edb
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SSDEEP
49152:avht62XlaSFNWPjljiFa2RoUYItFW7Bxn+oGdzTHHB72eh2NT:avL62XlaSFNWPjljiFXRoUYIrW2
Malware Config
Extracted
quasar
1.4.1
Office04
192.168.0.246:4782
1e9de725-2f46-4350-b6c8-78b3b776a085
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encryption_key
ACF3D3BDCC7612495B863F26348AD4EE3B96458B
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install_name
Client.exe
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log_directory
Logs
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reconnect_delay
3000
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startup_key
venom
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subdirectory
SubDir
Signatures
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Quasar payload 3 IoCs
Processes:
resource yara_rule behavioral1/memory/2628-1-0x0000000000BC0000-0x0000000000EE4000-memory.dmp family_quasar C:\Users\Admin\AppData\Roaming\SubDir\Client.exe family_quasar behavioral1/memory/1808-9-0x00000000010A0000-0x00000000013C4000-memory.dmp family_quasar -
Executes dropped EXE 1 IoCs
Processes:
Client.exepid process 1808 Client.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
Processes:
schtasks.exeschtasks.exepid process 2108 schtasks.exe 2672 schtasks.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
Processes:
Venom.exeClient.exedescription pid process Token: SeDebugPrivilege 2628 Venom.exe Token: SeDebugPrivilege 1808 Client.exe -
Suspicious use of FindShellTrayWindow 1 IoCs
Processes:
Client.exepid process 1808 Client.exe -
Suspicious use of SendNotifyMessage 1 IoCs
Processes:
Client.exepid process 1808 Client.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
Processes:
Client.exepid process 1808 Client.exe -
Suspicious use of WriteProcessMemory 9 IoCs
Processes:
Venom.exeClient.exedescription pid process target process PID 2628 wrote to memory of 2108 2628 Venom.exe schtasks.exe PID 2628 wrote to memory of 2108 2628 Venom.exe schtasks.exe PID 2628 wrote to memory of 2108 2628 Venom.exe schtasks.exe PID 2628 wrote to memory of 1808 2628 Venom.exe Client.exe PID 2628 wrote to memory of 1808 2628 Venom.exe Client.exe PID 2628 wrote to memory of 1808 2628 Venom.exe Client.exe PID 1808 wrote to memory of 2672 1808 Client.exe schtasks.exe PID 1808 wrote to memory of 2672 1808 Client.exe schtasks.exe PID 1808 wrote to memory of 2672 1808 Client.exe schtasks.exe -
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\Venom.exe"C:\Users\Admin\AppData\Local\Temp\Venom.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2628 -
C:\Windows\system32\schtasks.exe"schtasks" /create /tn "venom" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f2⤵
- Scheduled Task/Job: Scheduled Task
PID:2108 -
C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"2⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1808 -
C:\Windows\system32\schtasks.exe"schtasks" /create /tn "venom" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f3⤵
- Scheduled Task/Job: Scheduled Task
PID:2672
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
3.1MB
MD51348632fc2ede08cab5db1cb174ff0d3
SHA12a1966291aa0e7aee1b039a1a75fa4879489a2be
SHA256900cb76890979aa50347b7b929ef1babd7c677966f642aa4d74cf973136a48bf
SHA51252f68303d71f1293b02784539ef3250a95cf9ef4cb868e26e381a86667ab4f5cfc5a36d462ff746dc021bc0420cf8f0b31b050ec4142fb1be4b8f626fae39edb