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Analysis
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max time kernel
149s -
max time network
150s -
platform
windows10-2004_x64 -
resource
win10v2004-20241007-en -
resource tags
arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system -
submitted
22/01/2025, 02:38
Behavioral task
behavioral1
Sample
6600b4938a679ecd93d6149fb3f8fe74c8b347106de55a4853a76ae7a204950e.exe
Resource
win7-20240903-en
General
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Target
6600b4938a679ecd93d6149fb3f8fe74c8b347106de55a4853a76ae7a204950e.exe
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Size
502KB
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MD5
71685fb1a3701f1e27e48ba3e3ce9530
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SHA1
f460a9ecc7e35b4691532bc6c647dbe3973a51ca
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SHA256
6600b4938a679ecd93d6149fb3f8fe74c8b347106de55a4853a76ae7a204950e
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SHA512
3a7505c3faacf6f3e113570545767757d2db5aa342023a4eea27e49e4d632a0064a957c6b07f950e727dd71b8262b768626521cf1d1fbb195fd36d7db7bf5c5a
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SSDEEP
12288:9TEgdfY2xUJkhPPck43yw7VpDZx68Vcde:eUwtOoyw7VpDZdcde
Malware Config
Extracted
quasar
1.4.0
Office04
137.184.144.245:4782
6cfe4a65-c41d-4b02-9ae9-e727a748ae84
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encryption_key
B702BA239316FCF317B584A351F2EC1696EBE772
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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
java updater
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subdirectory
SubDir
Signatures
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Quasar family
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Quasar payload 2 IoCs
resource yara_rule behavioral2/memory/728-1-0x0000000000D40000-0x0000000000DC4000-memory.dmp family_quasar behavioral2/files/0x0007000000023c86-5.dat family_quasar -
Executes dropped EXE 1 IoCs
pid Process 3632 Client.exe -
Drops file in System32 directory 2 IoCs
description ioc Process File created C:\Windows\system32\SubDir\Client.exe 6600b4938a679ecd93d6149fb3f8fe74c8b347106de55a4853a76ae7a204950e.exe File opened for modification C:\Windows\system32\SubDir\Client.exe 6600b4938a679ecd93d6149fb3f8fe74c8b347106de55a4853a76ae7a204950e.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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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 2344 schtasks.exe 4196 schtasks.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
description pid Process Token: SeDebugPrivilege 728 6600b4938a679ecd93d6149fb3f8fe74c8b347106de55a4853a76ae7a204950e.exe Token: SeDebugPrivilege 3632 Client.exe -
Suspicious use of FindShellTrayWindow 1 IoCs
pid Process 3632 Client.exe -
Suspicious use of SendNotifyMessage 1 IoCs
pid Process 3632 Client.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
pid Process 3632 Client.exe -
Suspicious use of WriteProcessMemory 6 IoCs
description pid Process procid_target PID 728 wrote to memory of 2344 728 6600b4938a679ecd93d6149fb3f8fe74c8b347106de55a4853a76ae7a204950e.exe 83 PID 728 wrote to memory of 2344 728 6600b4938a679ecd93d6149fb3f8fe74c8b347106de55a4853a76ae7a204950e.exe 83 PID 728 wrote to memory of 3632 728 6600b4938a679ecd93d6149fb3f8fe74c8b347106de55a4853a76ae7a204950e.exe 85 PID 728 wrote to memory of 3632 728 6600b4938a679ecd93d6149fb3f8fe74c8b347106de55a4853a76ae7a204950e.exe 85 PID 3632 wrote to memory of 4196 3632 Client.exe 86 PID 3632 wrote to memory of 4196 3632 Client.exe 86 -
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\6600b4938a679ecd93d6149fb3f8fe74c8b347106de55a4853a76ae7a204950e.exe"C:\Users\Admin\AppData\Local\Temp\6600b4938a679ecd93d6149fb3f8fe74c8b347106de55a4853a76ae7a204950e.exe"1⤵
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:728 -
C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "java updater" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\6600b4938a679ecd93d6149fb3f8fe74c8b347106de55a4853a76ae7a204950e.exe" /rl HIGHEST /f2⤵
- Scheduled Task/Job: Scheduled Task
PID:2344
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C:\Windows\system32\SubDir\Client.exe"C:\Windows\system32\SubDir\Client.exe"2⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3632 -
C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "java updater" /sc ONLOGON /tr "C:\Windows\system32\SubDir\Client.exe" /rl HIGHEST /f3⤵
- Scheduled Task/Job: Scheduled Task
PID:4196
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
502KB
MD571685fb1a3701f1e27e48ba3e3ce9530
SHA1f460a9ecc7e35b4691532bc6c647dbe3973a51ca
SHA2566600b4938a679ecd93d6149fb3f8fe74c8b347106de55a4853a76ae7a204950e
SHA5123a7505c3faacf6f3e113570545767757d2db5aa342023a4eea27e49e4d632a0064a957c6b07f950e727dd71b8262b768626521cf1d1fbb195fd36d7db7bf5c5a