Analysis
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max time kernel
788s -
max time network
805s -
platform
windows10-2004_x64 -
resource
win10v2004-20240802-en -
resource tags
arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system -
submitted
18/08/2024, 22:16
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
ad8250eea17d8d7db7c3c23aba289f5c
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SHA1
c63d1c6b6e8b7789a777b1ffe55f15bbbfc3cc59
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SHA256
f3de21ec995555ab187ce0a254d2b353c1ed3c06030678f898ec56efabbae51f
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SHA512
d34b9db43bd08dea4452925c7c1cf4014d03b024a663b5ee938a4f205b3c6c49eccd169cbc687145d54223d07aafcde75ee0807963e705c9c71e130c00086abd
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SSDEEP
49152:tei8dGFjxJFp/DGoye3Z4LVXcBzJQI2zoTHHB72eh2NTfbDW:teCFjxJTbGor3Z4LVSeDH
Malware Config
Extracted
quasar
1.4.1
SKIDS
147.185.221.22:10340
9b51d4f5-bfe4-4a06-ba47-dcfbf9fe8529
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encryption_key
AEAE9E349BB922A243A5FF22FF4A80613533B71B
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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 2 IoCs
resource yara_rule behavioral2/memory/3424-1-0x0000000000E70000-0x00000000011D0000-memory.dmp family_quasar behavioral2/files/0x0007000000023434-6.dat family_quasar -
Executes dropped EXE 1 IoCs
pid Process 2140 Windows Host Process.exe -
Drops file in System32 directory 5 IoCs
description ioc Process 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 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 -
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 4884 schtasks.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
description pid Process Token: SeDebugPrivilege 3424 Client-built.exe Token: SeDebugPrivilege 2140 Windows Host Process.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
pid Process 2140 Windows Host Process.exe -
Suspicious use of WriteProcessMemory 6 IoCs
description pid Process procid_target PID 3424 wrote to memory of 2812 3424 Client-built.exe 84 PID 3424 wrote to memory of 2812 3424 Client-built.exe 84 PID 3424 wrote to memory of 2140 3424 Client-built.exe 86 PID 3424 wrote to memory of 2140 3424 Client-built.exe 86 PID 2140 wrote to memory of 4884 2140 Windows Host Process.exe 91 PID 2140 wrote to memory of 4884 2140 Windows Host Process.exe 91 -
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:3424 -
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:2140 -
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:4884
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
3.4MB
MD5ad8250eea17d8d7db7c3c23aba289f5c
SHA1c63d1c6b6e8b7789a777b1ffe55f15bbbfc3cc59
SHA256f3de21ec995555ab187ce0a254d2b353c1ed3c06030678f898ec56efabbae51f
SHA512d34b9db43bd08dea4452925c7c1cf4014d03b024a663b5ee938a4f205b3c6c49eccd169cbc687145d54223d07aafcde75ee0807963e705c9c71e130c00086abd