Analysis
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max time kernel
130s -
max time network
154s -
platform
windows7_x64 -
resource
win7-20240704-en -
resource tags
arch:x64arch:x86image:win7-20240704-enlocale:en-usos:windows7-x64system -
submitted
18/08/2024, 22:04
Behavioral task
behavioral1
Sample
Client-built.exe
Resource
win7-20240704-en
General
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Target
Client-built.exe
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Size
3.4MB
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MD5
bc04ef1699a3b490ff2703a0bb2dcca0
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SHA1
b3f70784fb7c7ef0a3cca81280ede2ffe2671e35
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SHA256
844f43264b78b25a6526ab5f9997cca8243f67d51400f2abd4fd3c777b5fb983
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SHA512
e3d11bd54f4409c3a846e6466063d5e29f8222b3c2a2291b19401632a7a3884ed6bde8327c664f2b43e6e67914fca1eae4805730adbfd37706ac4d7e0a28a2e1
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SSDEEP
49152:xei8dGFjxJFp/DGoye3Z4LVYcl9v6igI2VSG3THHB72eh2NTfXDW:xeCFjxJTbGor3Z4LVY9r+JT
Malware Config
Extracted
quasar
1.4.1
SKIDS
147.185.221.22:10340
9b51d4f5-bfe4-4a06-ba47-dcfbf9fe8529
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encryption_key
9E968F05BD874BA1BE086FD1774A027473823F49
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install_name
Windows Host Process.exe
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log_directory
Windows-Logs
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reconnect_delay
3000
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startup_key
Windows Host Process
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subdirectory
Windows
Signatures
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Quasar payload 3 IoCs
resource yara_rule behavioral1/memory/2484-1-0x0000000000010000-0x0000000000370000-memory.dmp family_quasar behavioral1/files/0x002f0000000173e4-6.dat family_quasar behavioral1/memory/2716-9-0x0000000000950000-0x0000000000CB0000-memory.dmp family_quasar -
Executes dropped EXE 1 IoCs
pid Process 2716 Windows Host Process.exe -
Drops file in System32 directory 5 IoCs
description ioc Process File created C:\Windows\system32\Windows\Windows Host Process.exe Client-built.exe File opened for modification C:\Windows\system32\Windows\Windows Host Process.exe Client-built.exe File opened for modification C:\Windows\system32\Windows Client-built.exe File opened for modification C:\Windows\system32\Windows\Windows Host Process.exe Windows Host Process.exe File opened for modification C:\Windows\system32\Windows Windows Host Process.exe -
Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
pid Process 2812 schtasks.exe 2828 schtasks.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
description pid Process Token: SeDebugPrivilege 2484 Client-built.exe Token: SeDebugPrivilege 2716 Windows Host Process.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
pid Process 2716 Windows Host Process.exe -
Suspicious use of WriteProcessMemory 9 IoCs
description pid Process procid_target PID 2484 wrote to memory of 2812 2484 Client-built.exe 30 PID 2484 wrote to memory of 2812 2484 Client-built.exe 30 PID 2484 wrote to memory of 2812 2484 Client-built.exe 30 PID 2484 wrote to memory of 2716 2484 Client-built.exe 32 PID 2484 wrote to memory of 2716 2484 Client-built.exe 32 PID 2484 wrote to memory of 2716 2484 Client-built.exe 32 PID 2716 wrote to memory of 2828 2716 Windows Host Process.exe 33 PID 2716 wrote to memory of 2828 2716 Windows Host Process.exe 33 PID 2716 wrote to memory of 2828 2716 Windows Host Process.exe 33 -
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\Client-built.exe"C:\Users\Admin\AppData\Local\Temp\Client-built.exe"1⤵
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2484 -
C:\Windows\system32\schtasks.exe"schtasks" /create /tn "Windows Host Process" /sc ONLOGON /tr "C:\Windows\system32\Windows\Windows Host Process.exe" /rl HIGHEST /f2⤵
- Scheduled Task/Job: Scheduled Task
PID:2812
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C:\Windows\system32\Windows\Windows Host Process.exe"C:\Windows\system32\Windows\Windows Host Process.exe"2⤵
- Executes dropped EXE
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2716 -
C:\Windows\system32\schtasks.exe"schtasks" /create /tn "Windows Host Process" /sc ONLOGON /tr "C:\Windows\system32\Windows\Windows Host Process.exe" /rl HIGHEST /f3⤵
- Scheduled Task/Job: Scheduled Task
PID:2828
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
3.4MB
MD5bc04ef1699a3b490ff2703a0bb2dcca0
SHA1b3f70784fb7c7ef0a3cca81280ede2ffe2671e35
SHA256844f43264b78b25a6526ab5f9997cca8243f67d51400f2abd4fd3c777b5fb983
SHA512e3d11bd54f4409c3a846e6466063d5e29f8222b3c2a2291b19401632a7a3884ed6bde8327c664f2b43e6e67914fca1eae4805730adbfd37706ac4d7e0a28a2e1