Analysis
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max time kernel
1561s -
max time network
1566s -
platform
windows7_x64 -
resource
win7-20231023-en -
resource tags
arch:x64arch:x86image:win7-20231023-enlocale:en-usos:windows7-x64system -
submitted
27-11-2023 09:45
Behavioral task
behavioral1
Sample
3.exe
Resource
win7-20231023-en
General
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Target
3.exe
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Size
3.1MB
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MD5
fc4aeba6edc65fcf2bd47bf61c66ca4c
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SHA1
532f44164ccec22376d6e29f58f44934dfeadb5c
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SHA256
0a6e5f7ca85a281115b343cb8be21e969ab42efb02ff8cc138c7800291839c8d
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SHA512
3c72078fdacbe38418b4a8ffc34e895a69e8c7df5175f0207b56c5ae4f043b3571e05e6e38e5100b21af52e05e80dfee27ff1a44a687d8ae380efda7b11f43d1
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SSDEEP
49152:ev1t62XlaSFNWPjljiFa2RoUYIjjjYmzYaoGd4THHB72eh2NT:evH62XlaSFNWPjljiFXRoUYIjjj3
Malware Config
Extracted
quasar
1.4.1
Office04
127.0.0.7:5555
6f01cc79-8527-4436-a34a-473fcf92b46f
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encryption_key
D52EA8296126E8DD7D221BC02E2826F1CAA96C78
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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
SubDir
Signatures
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Quasar payload 1 IoCs
resource yara_rule behavioral1/memory/2440-0-0x0000000001050000-0x0000000001374000-memory.dmp family_quasar -
Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
pid Process 2204 schtasks.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
description pid Process Token: SeDebugPrivilege 2440 3.exe -
Suspicious use of WriteProcessMemory 3 IoCs
description pid Process procid_target PID 2440 wrote to memory of 2204 2440 3.exe 28 PID 2440 wrote to memory of 2204 2440 3.exe 28 PID 2440 wrote to memory of 2204 2440 3.exe 28 -
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\3.exe"C:\Users\Admin\AppData\Local\Temp\3.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2440 -
C:\Windows\system32\schtasks.exe"schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f2⤵
- Creates scheduled task(s)
PID:2204
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