Analysis
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max time kernel
148s -
max time network
123s -
platform
windows7_x64 -
resource
win7-20240705-en -
resource tags
arch:x64arch:x86image:win7-20240705-enlocale:en-usos:windows7-x64system -
submitted
04-08-2024 00:42
Behavioral task
behavioral1
Sample
Client-built.exe
Resource
win7-20240705-en
General
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Target
Client-built.exe
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Size
3.1MB
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MD5
94050f9434efcd579e1be0f1698dc4be
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SHA1
b1f9f9bb740805af70d91fd8dc16034fe6108b86
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SHA256
0fff45906cb1259652e8488ce8b7ce888a63c97332d9e3c7eb93b4c2aac1ea38
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SHA512
ed580833c456aafdd84871883f9bd2820e9c6a07e3402f69d5c632498491dba399c6e2464ef9379c944e7a4859ed634803d348d9ea24beb27d8dec47b64c09ad
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SSDEEP
49152:Pvkt62XlaSFNWPjljiFa2RoUYINdxNESEck/igLoGd065THHB72eh2NT:Pv462XlaSFNWPjljiFXRoUYI7x/+
Malware Config
Extracted
quasar
1.4.1
Office04
127.0.0.1:80
511efb52-a9ae-4985-832e-16d38c44402d
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encryption_key
049DD0CDFAFA72509A542346F4510116A4D0866B
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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
Quasar Client Startup
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subdirectory
SubDir
Signatures
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Quasar payload 3 IoCs
Processes:
resource yara_rule behavioral1/memory/3028-1-0x0000000001380000-0x00000000016A4000-memory.dmp family_quasar C:\Users\Admin\AppData\Roaming\SubDir\Client.exe family_quasar behavioral1/memory/316-9-0x0000000000D00000-0x0000000001024000-memory.dmp family_quasar -
Executes dropped EXE 1 IoCs
Processes:
Client.exepid process 316 Client.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
Processes:
Client-built.exeClient.exedescription pid process Token: SeDebugPrivilege 3028 Client-built.exe Token: SeDebugPrivilege 316 Client.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
Processes:
Client.exepid process 316 Client.exe -
Suspicious use of WriteProcessMemory 3 IoCs
Processes:
Client-built.exedescription pid process target process PID 3028 wrote to memory of 316 3028 Client-built.exe Client.exe PID 3028 wrote to memory of 316 3028 Client-built.exe Client.exe PID 3028 wrote to memory of 316 3028 Client-built.exe Client.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\Client-built.exe"C:\Users\Admin\AppData\Local\Temp\Client-built.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3028 -
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 SetWindowsHookEx
PID:316
Network
MITRE ATT&CK Matrix
Replay Monitor
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Downloads
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Filesize
3.1MB
MD594050f9434efcd579e1be0f1698dc4be
SHA1b1f9f9bb740805af70d91fd8dc16034fe6108b86
SHA2560fff45906cb1259652e8488ce8b7ce888a63c97332d9e3c7eb93b4c2aac1ea38
SHA512ed580833c456aafdd84871883f9bd2820e9c6a07e3402f69d5c632498491dba399c6e2464ef9379c944e7a4859ed634803d348d9ea24beb27d8dec47b64c09ad