Analysis
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max time kernel
150s -
max time network
150s -
platform
windows7_x64 -
resource
win7-20240705-en -
resource tags
arch:x64arch:x86image:win7-20240705-enlocale:en-usos:windows7-x64system -
submitted
18/08/2024, 21:19
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
3.3MB
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MD5
449c9192baa7503151f8bb30aa32153b
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SHA1
3906a9de42cb337d89e49542660f38144138d7ba
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SHA256
2d43f484fc7f954ecd5da337017ab2eb58c26ef39ec07e9bf5d53af63c9c4db8
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SHA512
c1fe393d34f2af903c755c9d18faeb71193ef6ceb285d1900c2b6df1798346f927367ab32c5b2de5f39e47b781f8a94224642effe2400323f7a0153a0c7fa624
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SSDEEP
49152:N6LFXL5Z8hlPKxXavYPBdjSx7sx+5I2jEyTHHB72eh2NT1:N6p5Z8hlPKxXavIXc7sx0ux
Malware Config
Extracted
quasar
1.4.1
SKIDS
147.185.221.22:6712
9dcff5fc-a88b-409b-a00a-590c080de54a
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encryption_key
36CF4D30A4E867DAD17ECBDA8EC17D90EA239A59
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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/2676-1-0x0000000000F70000-0x00000000012C8000-memory.dmp family_quasar behavioral1/files/0x0007000000014b87-6.dat family_quasar behavioral1/memory/2152-9-0x0000000000AB0000-0x0000000000E08000-memory.dmp family_quasar -
Executes dropped EXE 1 IoCs
pid Process 2152 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 2252 schtasks.exe 796 schtasks.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
description pid Process Token: SeDebugPrivilege 2676 Client-built.exe Token: SeDebugPrivilege 2152 Windows Host Process.exe -
Suspicious use of FindShellTrayWindow 1 IoCs
pid Process 2152 Windows Host Process.exe -
Suspicious use of SendNotifyMessage 1 IoCs
pid Process 2152 Windows Host Process.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
pid Process 2152 Windows Host Process.exe -
Suspicious use of WriteProcessMemory 9 IoCs
description pid Process procid_target PID 2676 wrote to memory of 796 2676 Client-built.exe 30 PID 2676 wrote to memory of 796 2676 Client-built.exe 30 PID 2676 wrote to memory of 796 2676 Client-built.exe 30 PID 2676 wrote to memory of 2152 2676 Client-built.exe 32 PID 2676 wrote to memory of 2152 2676 Client-built.exe 32 PID 2676 wrote to memory of 2152 2676 Client-built.exe 32 PID 2152 wrote to memory of 2252 2152 Windows Host Process.exe 33 PID 2152 wrote to memory of 2252 2152 Windows Host Process.exe 33 PID 2152 wrote to memory of 2252 2152 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:2676 -
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:796
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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 FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2152 -
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:2252
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
3.3MB
MD5449c9192baa7503151f8bb30aa32153b
SHA13906a9de42cb337d89e49542660f38144138d7ba
SHA2562d43f484fc7f954ecd5da337017ab2eb58c26ef39ec07e9bf5d53af63c9c4db8
SHA512c1fe393d34f2af903c755c9d18faeb71193ef6ceb285d1900c2b6df1798346f927367ab32c5b2de5f39e47b781f8a94224642effe2400323f7a0153a0c7fa624