quasar | cbc58336a25eddf588be0b4c90fa9dd0267e545489b14c53505a53125a1a49db

Analysis

max time kernel
187s
max time network
191s
platform
windows7_x64
resource
win7-20240508-en
resource tags

arch:x64arch:x86image:win7-20240508-enlocale:en-usos:windows7-x64system
submitted
29-06-2024 21:02

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General

Target

41241.exe
Size

3.1MB
MD5

e22eded04f63ee8412924d986e3a522f
SHA1

ca0b817a54f1401b43b412013c0a948a03155619
SHA256

cbc58336a25eddf588be0b4c90fa9dd0267e545489b14c53505a53125a1a49db
SHA512

6ae9c8cf956939a15b3c6fdc40b905f0d5bb03e665309d0a15e3956f9912bd491087ad8cabbacd0dd7e0a2e50fca1af2f055805c8748105c43afc5bff85ba89e
SSDEEP

49152:Dv6I22SsaNYfdPBldt698dBcjHa++PJH1LoGdDTTHHB72eh2NT:Dv322SsaNYfdPBldt6+dBcjHa++Pz

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

pringelsy-44550.portmap.host:44550

Mutex

ed30a1b2-d1a0-4e30-a860-b77fa3f71c40

Attributes

encryption_key
49F9D3CAD835E70C60B54E401E356C16B3822AE8
install_name
Opera GX.exe
log_directory
Logs
reconnect_delay
1000
startup_key
OperaVPN
subdirectory
common Files

Signatures

Quasar RAT
Quasar is an open source Remote Access Tool.
trojan spyware quasar

Quasar payload 3 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2552-1-0x0000000000910000-0x0000000000C34000-memory.dmp	family_quasar
C:\Program Files\Common Files\Opera GX.exe	family_quasar
behavioral1/memory/2652-9-0x0000000000FC0000-0x00000000012E4000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

Processes:

Opera GX.exe

pid process

2652 Opera GX.exe

pid	process
2652	Opera GX.exe

Drops file in Program Files directory 5 IoCs

Processes:

Opera GX.exe41241.exe

description	ioc	process
File opened for modification	C:\Program Files\common Files\Opera GX.exe	Opera GX.exe
File opened for modification	C:\Program Files\common Files	Opera GX.exe
File created	C:\Program Files\common Files\Opera GX.exe	41241.exe
File opened for modification	C:\Program Files\common Files\Opera GX.exe	41241.exe
File opened for modification	C:\Program Files\common Files	41241.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082
Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence execution

Scheduled Task
T1053.005

Processes:

schtasks.exeschtasks.exe

pid process

2352 schtasks.exe
2676 schtasks.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

41241.exeOpera GX.exe

description pid process

Token: SeDebugPrivilege 2552 41241.exe
Token: SeDebugPrivilege 2652 Opera GX.exe
Suspicious use of FindShellTrayWindow 1 IoCs

Processes:

Opera GX.exe

pid process

2652 Opera GX.exe
Suspicious use of SendNotifyMessage 1 IoCs

Processes:

Opera GX.exe

pid process

2652 Opera GX.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

Opera GX.exe

pid process

2652 Opera GX.exe

pid	process
2352	schtasks.exe
2676	schtasks.exe

description	pid	process
Token: SeDebugPrivilege	2552	41241.exe
Token: SeDebugPrivilege	2652	Opera GX.exe

pid	process
2652	Opera GX.exe

pid	process
2652	Opera GX.exe

pid	process
2652	Opera GX.exe

Suspicious use of WriteProcessMemory 9 IoCs

Processes:

41241.exeOpera GX.exe

description	pid	process	target process
PID 2552 wrote to memory of 2352	2552	41241.exe	schtasks.exe
PID 2552 wrote to memory of 2352	2552	41241.exe	schtasks.exe
PID 2552 wrote to memory of 2352	2552	41241.exe	schtasks.exe
PID 2552 wrote to memory of 2652	2552	41241.exe	Opera GX.exe
PID 2552 wrote to memory of 2652	2552	41241.exe	Opera GX.exe
PID 2552 wrote to memory of 2652	2552	41241.exe	Opera GX.exe
PID 2652 wrote to memory of 2676	2652	Opera GX.exe	schtasks.exe
PID 2652 wrote to memory of 2676	2652	Opera GX.exe	schtasks.exe
PID 2652 wrote to memory of 2676	2652	Opera GX.exe	schtasks.exe

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.
persistence

Query Registry
T1012

C:\Users\Admin\AppData\Local\Temp\41241.exe
"C:\Users\Admin\AppData\Local\Temp\41241.exe"
1⤵
- Drops file in Program Files directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2552

C:\Windows\system32\schtasks.exe
"schtasks" /create /tn "OperaVPN" /sc ONLOGON /tr "C:\Program Files\common Files\Opera GX.exe" /rl HIGHEST /f
2⤵
- Scheduled Task/Job: Scheduled Task
PID:2352

C:\Program Files\common Files\Opera GX.exe
"C:\Program Files\common Files\Opera GX.exe"
2⤵
- Executes dropped EXE
- Drops file in Program Files directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2652

C:\Windows\system32\schtasks.exe
"schtasks" /create /tn "OperaVPN" /sc ONLOGON /tr "C:\Program Files\common Files\Opera GX.exe" /rl HIGHEST /f
3⤵
- Scheduled Task/Job: Scheduled Task
PID:2676

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads

C:\Program Files\Common Files\Opera GX.exe
Filesize
3.1MB

MD5
e22eded04f63ee8412924d986e3a522f

SHA1
ca0b817a54f1401b43b412013c0a948a03155619

SHA256
cbc58336a25eddf588be0b4c90fa9dd0267e545489b14c53505a53125a1a49db

SHA512
6ae9c8cf956939a15b3c6fdc40b905f0d5bb03e665309d0a15e3956f9912bd491087ad8cabbacd0dd7e0a2e50fca1af2f055805c8748105c43afc5bff85ba89e

Download Submit
memory/2552-0-0x000007FEF53B3000-0x000007FEF53B4000-memory.dmp

Filesize
4KB

Download
memory/2552-1-0x0000000000910000-0x0000000000C34000-memory.dmp

Filesize
3.1MB

Download
memory/2552-2-0x000007FEF53B0000-0x000007FEF5D9C000-memory.dmp

Filesize
9.9MB

Download
memory/2552-8-0x000007FEF53B0000-0x000007FEF5D9C000-memory.dmp

Filesize
9.9MB

Download
memory/2652-11-0x000007FEF53B0000-0x000007FEF5D9C000-memory.dmp

Filesize
9.9MB

Download
memory/2652-10-0x000007FEF53B0000-0x000007FEF5D9C000-memory.dmp

Filesize
9.9MB

Download
memory/2652-9-0x0000000000FC0000-0x00000000012E4000-memory.dmp

Filesize
3.1MB

Download
memory/2652-12-0x000007FEF53B0000-0x000007FEF5D9C000-memory.dmp

Filesize
9.9MB

Download
memory/2652-13-0x000007FEF53B0000-0x000007FEF5D9C000-memory.dmp

Filesize
9.9MB

Download