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Analysis
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max time kernel
126s -
max time network
135s -
platform
windows7_x64 -
resource
win7-20240903-en -
resource tags
arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system -
submitted
19/01/2025, 20:06
Behavioral task
behavioral1
Sample
e69d5c216f6cf59c3b71b0bf3444803e.exe
Resource
win7-20240903-en
General
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Target
e69d5c216f6cf59c3b71b0bf3444803e.exe
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Size
3.1MB
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MD5
e69d5c216f6cf59c3b71b0bf3444803e
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SHA1
e18de0fa930ed0ad786bd3e22c699762d93d3e95
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SHA256
3ec670197c9d917b0f258ea9f093289ee2e4b829451b8c9aa8f1d2e7170a2d8b
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SHA512
92ee6e7c5145b4281aaad5bdbe8f7a90c71ac247918112fbdb7f92256e9c562cdeeb15bb4716ee0dec168db96c1d7631023181ab7e932196effc653b8cb00527
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SSDEEP
49152:nvkI22SsaNYfdPBldt698dBcjHfqDybRcboGdj/mTHHB72eh2NT:nvJ22SsaNYfdPBldt6+dBcjHfqDV
Malware Config
Extracted
quasar
1.4.1
客户
121.36.102.48:1111
043c1c13-ad0b-4e54-a900-6308db7e18c0
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encryption_key
CBC848F0E8EC6B1B06081D6FFA1D98A8EAB2442E
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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
Microsofl
Signatures
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Quasar family
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Quasar payload 3 IoCs
resource yara_rule behavioral1/memory/2124-1-0x0000000000810000-0x0000000000B34000-memory.dmp family_quasar behavioral1/files/0x00070000000193c4-6.dat family_quasar behavioral1/memory/2764-9-0x0000000000F10000-0x0000000001234000-memory.dmp family_quasar -
Executes dropped EXE 1 IoCs
pid Process 2764 Client.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 2716 schtasks.exe 2652 schtasks.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
description pid Process Token: SeDebugPrivilege 2124 e69d5c216f6cf59c3b71b0bf3444803e.exe Token: SeDebugPrivilege 2764 Client.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
pid Process 2764 Client.exe -
Suspicious use of WriteProcessMemory 9 IoCs
description pid Process procid_target PID 2124 wrote to memory of 2652 2124 e69d5c216f6cf59c3b71b0bf3444803e.exe 30 PID 2124 wrote to memory of 2652 2124 e69d5c216f6cf59c3b71b0bf3444803e.exe 30 PID 2124 wrote to memory of 2652 2124 e69d5c216f6cf59c3b71b0bf3444803e.exe 30 PID 2124 wrote to memory of 2764 2124 e69d5c216f6cf59c3b71b0bf3444803e.exe 32 PID 2124 wrote to memory of 2764 2124 e69d5c216f6cf59c3b71b0bf3444803e.exe 32 PID 2124 wrote to memory of 2764 2124 e69d5c216f6cf59c3b71b0bf3444803e.exe 32 PID 2764 wrote to memory of 2716 2764 Client.exe 33 PID 2764 wrote to memory of 2716 2764 Client.exe 33 PID 2764 wrote to memory of 2716 2764 Client.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\e69d5c216f6cf59c3b71b0bf3444803e.exe"C:\Users\Admin\AppData\Local\Temp\e69d5c216f6cf59c3b71b0bf3444803e.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2124 -
C:\Windows\system32\schtasks.exe"schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\Microsofl\Client.exe" /rl HIGHEST /f2⤵
- Scheduled Task/Job: Scheduled Task
PID:2652
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C:\Users\Admin\AppData\Roaming\Microsofl\Client.exe"C:\Users\Admin\AppData\Roaming\Microsofl\Client.exe"2⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2764 -
C:\Windows\system32\schtasks.exe"schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\Microsofl\Client.exe" /rl HIGHEST /f3⤵
- Scheduled Task/Job: Scheduled Task
PID:2716
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
3.1MB
MD5e69d5c216f6cf59c3b71b0bf3444803e
SHA1e18de0fa930ed0ad786bd3e22c699762d93d3e95
SHA2563ec670197c9d917b0f258ea9f093289ee2e4b829451b8c9aa8f1d2e7170a2d8b
SHA51292ee6e7c5145b4281aaad5bdbe8f7a90c71ac247918112fbdb7f92256e9c562cdeeb15bb4716ee0dec168db96c1d7631023181ab7e932196effc653b8cb00527