Analysis
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max time kernel
134s -
max time network
152s -
platform
windows10-2004_x64 -
resource
win10v2004-20230220-en -
resource tags
arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system -
submitted
28-05-2023 01:32
Behavioral task
behavioral1
Sample
d79a203caba18b6e1190b0022296d56f96253d4fb39b96aaaeaaa02241f28b16.exe
Resource
win7-20230220-en
Behavioral task
behavioral2
Sample
d79a203caba18b6e1190b0022296d56f96253d4fb39b96aaaeaaa02241f28b16.exe
Resource
win10v2004-20230220-en
General
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Target
d79a203caba18b6e1190b0022296d56f96253d4fb39b96aaaeaaa02241f28b16.exe
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Size
1.0MB
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MD5
7a98ca652a682ae96bc3f9ac6d554d82
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SHA1
dbb6b1d490b64e9b1260d0ad55cd2fe1d776586f
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SHA256
d79a203caba18b6e1190b0022296d56f96253d4fb39b96aaaeaaa02241f28b16
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SHA512
6fd10b572f7c39fc2b33d57957f1c36102da158a22a5b4d855736dd5ed92a3ba5d945662d11ad2b69f845f16c48a9875258fa2cdc80089cd5863c7980d21ce9f
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SSDEEP
24576:t+ynkc1ZzBvtrZHFjMKY2naU8elKA9eaZYZg+ryTh:4ynkc1ZzBvtrZHFjMKY2nb8elKAgaZXN
Malware Config
Extracted
quasar
2.7.0.0
Venom Client
markphoto.casacam.net:5000
JlYM51eW4iZoFyLa2X
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encryption_key
BL7lZzIkUckEp2RCh8Q6
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install_name
Venom.exe
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log_directory
Logs
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reconnect_delay
3000
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startup_key
Venom Client Startup
Signatures
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Quasar payload 1 IoCs
Processes:
resource yara_rule behavioral2/memory/4484-133-0x0000000000E30000-0x0000000000F40000-memory.dmp family_quasar -
Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
Processes:
d79a203caba18b6e1190b0022296d56f96253d4fb39b96aaaeaaa02241f28b16.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000\Control Panel\International\Geo\Nation d79a203caba18b6e1190b0022296d56f96253d4fb39b96aaaeaaa02241f28b16.exe -
Adds Run key to start application 2 TTPs 2 IoCs
Processes:
WScript.exedescription ioc process Key created \REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000\Software\Microsoft\Windows\CurrentVersion\RunOnce WScript.exe Set value (str) \REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce\Venom Client Startup = "C:\\Users\\Admin\\AppData\\Roaming\\Venom.exe" WScript.exe -
Looks up external IP address via web service 1 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
Processes:
flow ioc 17 ip-api.com -
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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Modifies registry class 1 IoCs
Processes:
explorer.exedescription ioc process Key created \REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000_Classes\Local Settings explorer.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
Processes:
d79a203caba18b6e1190b0022296d56f96253d4fb39b96aaaeaaa02241f28b16.exedescription pid process Token: SeDebugPrivilege 4484 d79a203caba18b6e1190b0022296d56f96253d4fb39b96aaaeaaa02241f28b16.exe -
Suspicious use of WriteProcessMemory 8 IoCs
Processes:
d79a203caba18b6e1190b0022296d56f96253d4fb39b96aaaeaaa02241f28b16.exeexplorer.exedescription pid process target process PID 4484 wrote to memory of 940 4484 d79a203caba18b6e1190b0022296d56f96253d4fb39b96aaaeaaa02241f28b16.exe schtasks.exe PID 4484 wrote to memory of 940 4484 d79a203caba18b6e1190b0022296d56f96253d4fb39b96aaaeaaa02241f28b16.exe schtasks.exe PID 4484 wrote to memory of 940 4484 d79a203caba18b6e1190b0022296d56f96253d4fb39b96aaaeaaa02241f28b16.exe schtasks.exe PID 4484 wrote to memory of 3088 4484 d79a203caba18b6e1190b0022296d56f96253d4fb39b96aaaeaaa02241f28b16.exe explorer.exe PID 4484 wrote to memory of 3088 4484 d79a203caba18b6e1190b0022296d56f96253d4fb39b96aaaeaaa02241f28b16.exe explorer.exe PID 4484 wrote to memory of 3088 4484 d79a203caba18b6e1190b0022296d56f96253d4fb39b96aaaeaaa02241f28b16.exe explorer.exe PID 116 wrote to memory of 3772 116 explorer.exe WScript.exe PID 116 wrote to memory of 3772 116 explorer.exe WScript.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\d79a203caba18b6e1190b0022296d56f96253d4fb39b96aaaeaaa02241f28b16.exe"C:\Users\Admin\AppData\Local\Temp\d79a203caba18b6e1190b0022296d56f96253d4fb39b96aaaeaaa02241f28b16.exe"1⤵
- Checks computer location settings
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\schtasks.exe"schtasks" /create /tn "Venom Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\Venom.exe" /rl HIGHEST /f2⤵
- Creates scheduled task(s)
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C:\Windows\SysWOW64\explorer.exe"C:\Windows\System32\explorer.exe" C:\Users\Admin\AppData\Local\Execution.vbs2⤵
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C:\Windows\explorer.exeC:\Windows\explorer.exe /factory,{75dff2b7-6936-4c06-a8bb-676a7b00b24b} -Embedding1⤵
- Modifies registry class
- Suspicious use of WriteProcessMemory
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C:\Windows\System32\WScript.exe"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Execution.vbs"2⤵
- Adds Run key to start application
Network
MITRE ATT&CK Matrix ATT&CK v6
Replay Monitor
Loading Replay Monitor...
Downloads
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C:\Users\Admin\AppData\Local\Execution.vbsFilesize
487B
MD50bd2a48a7ea7bb9c3c6052f8689224d5
SHA1f50e7e305926794d8b06b41037b824aacec8f19f
SHA256c0d72c6c63c1db6caec20189d79fc208bc3891bd0a9e54fb62c272826a78f257
SHA512a98c9eef6421002c14b3241173c9224db1826683b82fafcd4b0891d6b5dee4cfac0d2c47206d682c04bb83361d99da04eb6a6919d51f8142195bfc4030f4765e
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memory/4484-133-0x0000000000E30000-0x0000000000F40000-memory.dmpFilesize
1.1MB
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memory/4484-134-0x0000000005DD0000-0x0000000006374000-memory.dmpFilesize
5.6MB
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memory/4484-135-0x0000000005940000-0x00000000059D2000-memory.dmpFilesize
584KB
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memory/4484-136-0x0000000005890000-0x00000000058A0000-memory.dmpFilesize
64KB
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memory/4484-137-0x0000000005CE0000-0x0000000005D46000-memory.dmpFilesize
408KB
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memory/4484-138-0x0000000006920000-0x0000000006932000-memory.dmpFilesize
72KB
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memory/4484-139-0x0000000006D50000-0x0000000006D8C000-memory.dmpFilesize
240KB
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memory/4484-140-0x0000000006FA0000-0x000000000703C000-memory.dmpFilesize
624KB
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memory/4484-144-0x0000000005890000-0x00000000058A0000-memory.dmpFilesize
64KB
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memory/4484-145-0x0000000007250000-0x000000000725A000-memory.dmpFilesize
40KB