Analysis
- max time kernel
148s - max time network
151s - platform
windows11-ltsc_2024_x64 - resource
win11ltsc2024-20260709-en - resource tags
arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows - submitted
02/08/2026, 05:43
Behavioral task
behavioral1
Sample
Client-built.exe
Resource
win10v2004-20260513-en
8 signatures
150 seconds
General
- Target Client-built.exe
- Size 3.1MB
- Sample260802-getcaawaja
- SHA256 49c3c8893145369089e941a46e06a12148190578dc4602aa90974c9a55aabd48
- MD5 25acd0718d4825c36b14eadc4575a516
- SHA1 dd462b9810bdd710b52aa3331e512de7728a4e6f
- SHA512 a75e31a27404572f44590014af22d6837e00b0c84d4a0f64dfc4495862ddda2d69d56becbd83cc6018fbba3377556f4a16f7538ff3537bcc72aa5ada8371ef2d
- SSDEEP 49152:KvClL26AaNeWgPhlmVqvMQ7XSKJiFfV0oGdJzQTHHB72eh2NT:Kv6L26AaNeWgPhlmVqkQ7XSKJiFqZ
- TLSH T1A4E56A543BF85E32E17BD6B3D5B0545263F0F82AF363EB0B6181677A1C93B4098426A7
- MD5 SHA1 SHA512 SSDEEP TLSH
Malware Config
Extracted
Family
-
quasar
Version
-
1.4.1
Botnet
-
Office04
C2
-
scorereport.com.co:443
-
alexray.co:443
Mutex
-
113a1acf-eae6-48f6-993c-1b6f95dce078
Attributes
-
encryption_key
F099FC50E900CAA52299FD44FD3089CF7142A9BF
-
install_name
Client.exe
-
key_salt
bfeb1e56fbcd973bb219022430a57843003d5644d21e62b9d4f180e7e6c33941
-
log_directory
Logs
-
reconnect_delay
3000
-
startup_key
Quasar Client Startup
-
subdirectory
SubDir
Signatures
- Quasar payload 2 IoCs
resource yara_rule behavioral2/memory/4376-1-0x0000000000290000-0x00000000005B4000-memory.dmp family_quasar behavioral2/files/0x000e00000001c584-15.dat family_quasar - Executes dropped EXE 1 IoCs
pid Process 2292 Client.exe - Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- Suspicious use of AdjustPrivilegeToken 2 IoCs
description pid Process Token: SeDebugPrivilege 4376 Client-built.exe Token: SeDebugPrivilege 2292 Client.exe - Suspicious use of FindShellTrayWindow 1 IoCs
pid Process 2292 Client.exe - Suspicious use of SendNotifyMessage 1 IoCs
pid Process 2292 Client.exe - Suspicious use of WriteProcessMemory 1 IoCs
description pid Process procid_target PID 4376 wrote to memory of 2292 4376 Client-built.exe 89
Processes
-
C:\Users\Admin\AppData\Local\Temp\Client-built.exe"C:\Users\Admin\AppData\Local\Temp\Client-built.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4376 -
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 FindShellTrayWindow
- Suspicious use of SendNotifyMessage
PID:2292
-
-
C:\Windows\system32\svchost.exeC:\Windows\system32\svchost.exe -k GPSvcGroup1⤵PID:3888
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
- Path C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
- Size 3.1MB
- SHA256 49c3c8893145369089e941a46e06a12148190578dc4602aa90974c9a55aabd48
- MD5 25acd0718d4825c36b14eadc4575a516
- SHA1 dd462b9810bdd710b52aa3331e512de7728a4e6f
- SHA512 a75e31a27404572f44590014af22d6837e00b0c84d4a0f64dfc4495862ddda2d69d56becbd83cc6018fbba3377556f4a16f7538ff3537bcc72aa5ada8371ef2d
- SSDEEP 49152:KvClL26AaNeWgPhlmVqvMQ7XSKJiFfV0oGdJzQTHHB72eh2NT:Kv6L26AaNeWgPhlmVqkQ7XSKJiFqZ
- TLSH T1A4E56A543BF85E32E17BD6B3D5B0545263F0F82AF363EB0B6181677A1C93B4098426A7
- MD5 SHA1 SHA512 SSDEEP TLSH