Analysis
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max time kernel
149s -
max time network
150s -
platform
windows10-2004_x64 -
resource
win10v2004-20240226-en -
resource tags
arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system -
submitted
15/03/2024, 09:13
Behavioral task
behavioral1
Sample
2386d1e1a35e51b0c869655580ab6431.exe
Resource
win7-20240221-en
General
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Target
2386d1e1a35e51b0c869655580ab6431.exe
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Size
3.1MB
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MD5
2386d1e1a35e51b0c869655580ab6431
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SHA1
44de49d3050793f1cea18a62fc7649c96deebaa7
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SHA256
a9e84520f8f8fd1383b54b297044ed2ca34e23172c7b6719a9185527b6fa194c
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SHA512
69d99d6d9d85c83f3d5029cec04abfddc54142044d39078799ba77fcec2715d41bbf4b114981fa697a8ee1afd9aa796733897e6d337ef1941e72d88631da5946
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SSDEEP
49152:nv+lL26AaNeWgPhlmVqvMQ7XSKOEoDkE2HBk/+F5oGd1LTHHB72eh2NT:nvuL26AaNeWgPhlmVqkQ7XSKroDKX
Malware Config
Extracted
quasar
1.4.1
Office01
www.exiles.site:14782
192.151.244.144:14782
32d6a0e2-190a-4f87-8d62-64ccb78f703b
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encryption_key
A1F8672246A55DFAFA317BFDC5F14C91A5B344B9
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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 2 IoCs
resource yara_rule behavioral2/memory/3092-0-0x00000000003F0000-0x0000000000714000-memory.dmp family_quasar behavioral2/files/0x000b000000023194-6.dat family_quasar -
Executes dropped EXE 1 IoCs
pid Process 2396 Client.exe -
Creates scheduled task(s) 1 TTPs 2 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
pid Process 212 schtasks.exe 2740 schtasks.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
description pid Process Token: SeDebugPrivilege 3092 2386d1e1a35e51b0c869655580ab6431.exe Token: SeDebugPrivilege 2396 Client.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
pid Process 2396 Client.exe -
Suspicious use of WriteProcessMemory 6 IoCs
description pid Process procid_target PID 3092 wrote to memory of 212 3092 2386d1e1a35e51b0c869655580ab6431.exe 93 PID 3092 wrote to memory of 212 3092 2386d1e1a35e51b0c869655580ab6431.exe 93 PID 3092 wrote to memory of 2396 3092 2386d1e1a35e51b0c869655580ab6431.exe 95 PID 3092 wrote to memory of 2396 3092 2386d1e1a35e51b0c869655580ab6431.exe 95 PID 2396 wrote to memory of 2740 2396 Client.exe 96 PID 2396 wrote to memory of 2740 2396 Client.exe 96 -
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\2386d1e1a35e51b0c869655580ab6431.exe"C:\Users\Admin\AppData\Local\Temp\2386d1e1a35e51b0c869655580ab6431.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3092 -
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:212
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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:2396 -
C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f3⤵
- Creates scheduled task(s)
PID:2740
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
3.1MB
MD52386d1e1a35e51b0c869655580ab6431
SHA144de49d3050793f1cea18a62fc7649c96deebaa7
SHA256a9e84520f8f8fd1383b54b297044ed2ca34e23172c7b6719a9185527b6fa194c
SHA51269d99d6d9d85c83f3d5029cec04abfddc54142044d39078799ba77fcec2715d41bbf4b114981fa697a8ee1afd9aa796733897e6d337ef1941e72d88631da5946