Analysis
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max time kernel
146s -
max time network
149s -
platform
windows11-21h2_x64 -
resource
win11-20240221-en -
resource tags
arch:x64arch:x86image:win11-20240221-enlocale:en-usos:windows11-21h2-x64system -
submitted
29/03/2024, 21:36
Behavioral task
behavioral1
Sample
4b49068a198e8dcc90d1ae5d623c2cf669c93e067573b26c880b56b14e550e3a.exe
Resource
win10v2004-20240226-en
General
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Target
4b49068a198e8dcc90d1ae5d623c2cf669c93e067573b26c880b56b14e550e3a.exe
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Size
3.1MB
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MD5
b05ef4b68b309f9aefa705d3c0ab50e1
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SHA1
ffbf50f019be8426868b616960713fa4f596905c
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SHA256
4b49068a198e8dcc90d1ae5d623c2cf669c93e067573b26c880b56b14e550e3a
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SHA512
e77b2fd9d92fd286cedd1f7a70767968a9048b02206493b43aaac11b73a29fbc8819a28f2fb7b765c87cfbf734fad0fda40483bb495a2f177833c31a5ce9294b
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SSDEEP
49152:2vPI22SsaNYfdPBldt698dBcjHKyRJ68bR3LoGdJJTHHB72eh2NT:2vA22SsaNYfdPBldt6+dBcjHKyRJ6GZ
Malware Config
Extracted
quasar
1.4.1
1st
94.156.8.44:4787
94.156.8.44:6606
8c89b218-c255-48cb-be3d-4ac14fe780fa
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encryption_key
4785083178D87EB2AD342D8849D0672AE29F1744
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install_name
softgui.exe
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log_directory
Logs
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reconnect_delay
3000
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startup_key
softgui.svc
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subdirectory
SubDir
Signatures
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Quasar payload 2 IoCs
resource yara_rule behavioral2/memory/3028-0-0x0000000000550000-0x0000000000874000-memory.dmp family_quasar behavioral2/files/0x000300000002a79c-6.dat family_quasar -
Executes dropped EXE 1 IoCs
pid Process 4532 softgui.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Creates scheduled task(s) 1 TTPs 2 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
pid Process 1608 schtasks.exe 3660 schtasks.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
description pid Process Token: SeDebugPrivilege 3028 4b49068a198e8dcc90d1ae5d623c2cf669c93e067573b26c880b56b14e550e3a.exe Token: SeDebugPrivilege 4532 softgui.exe -
Suspicious use of FindShellTrayWindow 2 IoCs
pid Process 4532 softgui.exe 4532 softgui.exe -
Suspicious use of SendNotifyMessage 2 IoCs
pid Process 4532 softgui.exe 4532 softgui.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
pid Process 4532 softgui.exe -
Suspicious use of WriteProcessMemory 6 IoCs
description pid Process procid_target PID 3028 wrote to memory of 1608 3028 4b49068a198e8dcc90d1ae5d623c2cf669c93e067573b26c880b56b14e550e3a.exe 78 PID 3028 wrote to memory of 1608 3028 4b49068a198e8dcc90d1ae5d623c2cf669c93e067573b26c880b56b14e550e3a.exe 78 PID 3028 wrote to memory of 4532 3028 4b49068a198e8dcc90d1ae5d623c2cf669c93e067573b26c880b56b14e550e3a.exe 80 PID 3028 wrote to memory of 4532 3028 4b49068a198e8dcc90d1ae5d623c2cf669c93e067573b26c880b56b14e550e3a.exe 80 PID 4532 wrote to memory of 3660 4532 softgui.exe 81 PID 4532 wrote to memory of 3660 4532 softgui.exe 81 -
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\4b49068a198e8dcc90d1ae5d623c2cf669c93e067573b26c880b56b14e550e3a.exe"C:\Users\Admin\AppData\Local\Temp\4b49068a198e8dcc90d1ae5d623c2cf669c93e067573b26c880b56b14e550e3a.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3028 -
C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "softgui.svc" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\softgui.exe" /rl HIGHEST /f2⤵
- Creates scheduled task(s)
PID:1608
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C:\Users\Admin\AppData\Roaming\SubDir\softgui.exe"C:\Users\Admin\AppData\Roaming\SubDir\softgui.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:4532 -
C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "softgui.svc" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\softgui.exe" /rl HIGHEST /f3⤵
- Creates scheduled task(s)
PID:3660
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
3.1MB
MD5b05ef4b68b309f9aefa705d3c0ab50e1
SHA1ffbf50f019be8426868b616960713fa4f596905c
SHA2564b49068a198e8dcc90d1ae5d623c2cf669c93e067573b26c880b56b14e550e3a
SHA512e77b2fd9d92fd286cedd1f7a70767968a9048b02206493b43aaac11b73a29fbc8819a28f2fb7b765c87cfbf734fad0fda40483bb495a2f177833c31a5ce9294b