quasar | 7d1bf9f36689ff81f73bfe204c00bd74dfe42bac0be0920cb55e6fe64f2011fe

Analysis

max time kernel
126s
max time network
135s
platform
windows7_x64
resource
win7-20241023-en
resource tags

arch:x64arch:x86image:win7-20241023-enlocale:en-usos:windows7-x64system
submitted
13-02-2025 09:30

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General

Target

vouspouveztester.exe
Size

3.1MB
MD5

86c49761e0261b95630106355c89edaf
SHA1

867c18978287e8bc8b4404db6ed81941f1cf6924
SHA256

7d1bf9f36689ff81f73bfe204c00bd74dfe42bac0be0920cb55e6fe64f2011fe
SHA512

b757e2598545b1a1cca4b0197b0add749594541abff29d2028b95680dc1b3164fa9774b3cdbfcc03e010e26ef718f93eafe0651483fc00f1f9a5cca897e5e6b4
SSDEEP

49152:PvnI22SsaNYfdPBldt698dBcjHEJQgU1JBZoG9eTHHB72eh2NT:PvI22SsaNYfdPBldt6+dBcjH0Qgg

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

192.168.1.213:4782

Mutex

a005cf30-c7bb-4e65-adde-16068da45e4c

Attributes

encryption_key
212E74E6C2BFEEA9C99F90E2F9B3DFE615E9D176
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Quasar Client Startup
subdirectory
SubDir

Signatures

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

Quasar payload 3 IoCs

resource	yara_rule
behavioral1/memory/3032-1-0x0000000001160000-0x0000000001484000-memory.dmp	family_quasar
behavioral1/files/0x0009000000015cd1-5.dat	family_quasar
behavioral1/memory/2604-8-0x00000000002A0000-0x00000000005C4000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
2604	Client.exe

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

System Information Discovery
T1082

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3032	vouspouveztester.exe
Token: SeDebugPrivilege	2604	Client.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
2604	Client.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
2604	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2604	Client.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 3032 wrote to memory of 2604	3032	vouspouveztester.exe	30
PID 3032 wrote to memory of 2604	3032	vouspouveztester.exe	30
PID 3032 wrote to memory of 2604	3032	vouspouveztester.exe	30

C:\Users\Admin\AppData\Local\Temp\vouspouveztester.exe
"C:\Users\Admin\AppData\Local\Temp\vouspouveztester.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3032
- 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
  - Suspicious use of SetWindowsHookEx
  PID:2604

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Roaming\SubDir\Client.exe

Filesize
3.1MB

MD5
86c49761e0261b95630106355c89edaf

SHA1
867c18978287e8bc8b4404db6ed81941f1cf6924

SHA256
7d1bf9f36689ff81f73bfe204c00bd74dfe42bac0be0920cb55e6fe64f2011fe

SHA512
b757e2598545b1a1cca4b0197b0add749594541abff29d2028b95680dc1b3164fa9774b3cdbfcc03e010e26ef718f93eafe0651483fc00f1f9a5cca897e5e6b4

Download Submit
memory/2604-9-0x000007FEF55E0000-0x000007FEF5FCC000-memory.dmp

Filesize
9.9MB

Download
memory/2604-8-0x00000000002A0000-0x00000000005C4000-memory.dmp

Filesize
3.1MB

Download
memory/2604-10-0x000007FEF55E0000-0x000007FEF5FCC000-memory.dmp

Filesize
9.9MB

Download
memory/2604-11-0x000007FEF55E0000-0x000007FEF5FCC000-memory.dmp

Filesize
9.9MB

Download
memory/3032-0-0x000007FEF55E3000-0x000007FEF55E4000-memory.dmp

Filesize
4KB

Download
memory/3032-1-0x0000000001160000-0x0000000001484000-memory.dmp

Filesize
3.1MB

Download
memory/3032-2-0x000007FEF55E0000-0x000007FEF5FCC000-memory.dmp

Filesize
9.9MB

Download
memory/3032-7-0x000007FEF55E0000-0x000007FEF5FCC000-memory.dmp

Filesize
9.9MB

Download