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Analysis
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max time kernel
149s -
max time network
150s -
platform
windows10-2004_x64 -
resource
win10v2004-20250129-en -
resource tags
arch:x64arch:x86image:win10v2004-20250129-enlocale:en-usos:windows10-2004-x64system -
submitted
30/01/2025, 07:56
Behavioral task
behavioral1
Sample
3dc3c88ce100a2f6d16e8c0fbd096b622810bb62dd6dcf5719c657254129ec31.exe
Resource
win7-20241010-en
General
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Target
3dc3c88ce100a2f6d16e8c0fbd096b622810bb62dd6dcf5719c657254129ec31.exe
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Size
3.1MB
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MD5
fbb44da2d0860af30fc45116529832df
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SHA1
44377732b9959172cdb261d366069801adafd52a
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SHA256
3dc3c88ce100a2f6d16e8c0fbd096b622810bb62dd6dcf5719c657254129ec31
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SHA512
b1cdda7f3b67f1bedfbf896a4e7e8af0d12aa78a8709604d1262cc68ff0b0bdb3a326e7325075210f4d4e22e43fd7a7fa4bfbc90fc4c032bc3f3304f79157909
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SSDEEP
49152:Pvyt62XlaSFNWPjljiFa2RoUYIonF7KoGd1GKuTHHB72eh2NT:Pva62XlaSFNWPjljiFXRoUYIonFW
Malware Config
Extracted
quasar
1.4.1
svhost32
87.228.57.81:4782
47b71fc0-b2c4-4112-b97a-39385a5399c1
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encryption_key
19A0FAF8459F69650B5965C225752D425C429EEC
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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
svhost32
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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/4784-1-0x0000000000380000-0x00000000006A4000-memory.dmp family_quasar behavioral2/files/0x0011000000023a6a-6.dat family_quasar -
Executes dropped EXE 1 IoCs
pid Process 3832 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 2972 schtasks.exe 3824 schtasks.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
description pid Process Token: SeDebugPrivilege 4784 3dc3c88ce100a2f6d16e8c0fbd096b622810bb62dd6dcf5719c657254129ec31.exe Token: SeDebugPrivilege 3832 Client.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
pid Process 3832 Client.exe -
Suspicious use of WriteProcessMemory 6 IoCs
description pid Process procid_target PID 4784 wrote to memory of 2972 4784 3dc3c88ce100a2f6d16e8c0fbd096b622810bb62dd6dcf5719c657254129ec31.exe 85 PID 4784 wrote to memory of 2972 4784 3dc3c88ce100a2f6d16e8c0fbd096b622810bb62dd6dcf5719c657254129ec31.exe 85 PID 4784 wrote to memory of 3832 4784 3dc3c88ce100a2f6d16e8c0fbd096b622810bb62dd6dcf5719c657254129ec31.exe 87 PID 4784 wrote to memory of 3832 4784 3dc3c88ce100a2f6d16e8c0fbd096b622810bb62dd6dcf5719c657254129ec31.exe 87 PID 3832 wrote to memory of 3824 3832 Client.exe 88 PID 3832 wrote to memory of 3824 3832 Client.exe 88 -
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\3dc3c88ce100a2f6d16e8c0fbd096b622810bb62dd6dcf5719c657254129ec31.exe"C:\Users\Admin\AppData\Local\Temp\3dc3c88ce100a2f6d16e8c0fbd096b622810bb62dd6dcf5719c657254129ec31.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4784 -
C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "svhost32" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f2⤵
- Scheduled Task/Job: Scheduled Task
PID:2972
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C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"2⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3832 -
C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "svhost32" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f3⤵
- Scheduled Task/Job: Scheduled Task
PID:3824
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
3.1MB
MD5fbb44da2d0860af30fc45116529832df
SHA144377732b9959172cdb261d366069801adafd52a
SHA2563dc3c88ce100a2f6d16e8c0fbd096b622810bb62dd6dcf5719c657254129ec31
SHA512b1cdda7f3b67f1bedfbf896a4e7e8af0d12aa78a8709604d1262cc68ff0b0bdb3a326e7325075210f4d4e22e43fd7a7fa4bfbc90fc4c032bc3f3304f79157909