quasar | 9c881a05c58c18e795f9f687804c8a4f13244744bbcd0b1bd07856cbd42a378d

Analysis

max time kernel
126s
max time network
136s
platform
windows7_x64
resource
win7-20241010-en
resource tags

arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-x64system
submitted
19-01-2025 04:26

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General

Target

Client-built.exe
Size

3.1MB
MD5

e84825f20d531199cefcdf8f0ac0a5bf
SHA1

e016a14c992c56ef916da2465211ebbfee8502c1
SHA256

9c881a05c58c18e795f9f687804c8a4f13244744bbcd0b1bd07856cbd42a378d
SHA512

d9b719ec9853d8c9aaeb8e597082cb69c9a338d4f5dd3685e49841dc93f03e63f67e4f21ec59fa10b561c412cbde124d589f7b1cff1525002f3b78eaf4995fab
SSDEEP

49152:SvyI22SsaNYfdPBldt698dBcjHEYhBbRjPLoGdzkTHHB72eh2NT:Svf22SsaNYfdPBldt6+dBcjHEYh7Tj

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

192.168.2.19:4782

Mutex

112650ca-1287-418e-b9d3-1664d22cb8f1

Attributes

encryption_key
CA3612A22558F9AC4A3F0665F4EF083FB1D45393
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/2520-1-0x00000000000A0000-0x00000000003C4000-memory.dmp	family_quasar
behavioral1/files/0x000700000001921d-6.dat	family_quasar
behavioral1/memory/1148-9-0x0000000000F30000-0x0000000001254000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
1148	Client.exe

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

pid	Process
2752	schtasks.exe
1784	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2520	Client-built.exe
Token: SeDebugPrivilege	1148	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1148	Client.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2520 wrote to memory of 1784	2520	Client-built.exe	31
PID 2520 wrote to memory of 1784	2520	Client-built.exe	31
PID 2520 wrote to memory of 1784	2520	Client-built.exe	31
PID 2520 wrote to memory of 1148	2520	Client-built.exe	33
PID 2520 wrote to memory of 1148	2520	Client-built.exe	33
PID 2520 wrote to memory of 1148	2520	Client-built.exe	33
PID 1148 wrote to memory of 2752	1148	Client.exe	34
PID 1148 wrote to memory of 2752	1148	Client.exe	34
PID 1148 wrote to memory of 2752	1148	Client.exe	34

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\Client-built.exe
"C:\Users\Admin\AppData\Local\Temp\Client-built.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2520
- C:\Windows\system32\schtasks.exe
  "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:1784
- 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:1148
- - C:\Windows\system32\schtasks.exe
    "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2752

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
3.1MB

MD5
e84825f20d531199cefcdf8f0ac0a5bf

SHA1
e016a14c992c56ef916da2465211ebbfee8502c1

SHA256
9c881a05c58c18e795f9f687804c8a4f13244744bbcd0b1bd07856cbd42a378d

SHA512
d9b719ec9853d8c9aaeb8e597082cb69c9a338d4f5dd3685e49841dc93f03e63f67e4f21ec59fa10b561c412cbde124d589f7b1cff1525002f3b78eaf4995fab

Download Submit
memory/1148-8-0x000007FEF51C0000-0x000007FEF5BAC000-memory.dmp

Filesize
9.9MB

Download
memory/1148-9-0x0000000000F30000-0x0000000001254000-memory.dmp

Filesize
3.1MB

Download
memory/1148-11-0x000007FEF51C0000-0x000007FEF5BAC000-memory.dmp

Filesize
9.9MB

Download
memory/1148-12-0x000007FEF51C0000-0x000007FEF5BAC000-memory.dmp

Filesize
9.9MB

Download
memory/2520-0-0x000007FEF51C3000-0x000007FEF51C4000-memory.dmp

Filesize
4KB

Download
memory/2520-1-0x00000000000A0000-0x00000000003C4000-memory.dmp

Filesize
3.1MB

Download
memory/2520-2-0x000007FEF51C0000-0x000007FEF5BAC000-memory.dmp

Filesize
9.9MB

Download
memory/2520-10-0x000007FEF51C0000-0x000007FEF5BAC000-memory.dmp

Filesize
9.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads