quasar | 5d492a1ee6301ae5b39955cb1c0cc2258de52313d7882f3ad95ac59661a7874d

General

Target

5d492a1ee6301ae5b39955cb1c0cc2258de52313d7882f3ad95ac59661a7874dN.exe
Size

3.1MB
MD5

f9e97e1d0baab5246233fca2eea990a0
SHA1

06b2a0eb80616eae7a9c259e8919ce7c0fb5c5a2
SHA256

5d492a1ee6301ae5b39955cb1c0cc2258de52313d7882f3ad95ac59661a7874d
SHA512

117eb156be6ba2c50871878c4460e636d56ac6b08b04cc164314cf16269a5f395234c37bf558ce6b2fac179fd1003d24de8373f1892ec69788370784de339192
SSDEEP

49152:rvgz92YpaQI6oPZlhP3ReybewogVRJ6ObR3LoGdITHHB72eh2NT:rv692YpaQI6oPZlhP3YybewogVRJ6I

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

2001:861:560e:ce30:6db0:3453:f804:711a:4782

89.85.26.128:4782

192.168.1.156:4782

Mutex

533fcd22-27a2-420e-9f21-2ff3d79ee14d

Attributes

encryption_key
52128CFEF3F48BE853BD8D76B4977E834A464AA8
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 2 IoCs

resource	yara_rule
behavioral2/memory/384-1-0x0000000000750000-0x0000000000A74000-memory.dmp	family_quasar
behavioral2/files/0x0007000000023cb5-6.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
4724	Client.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

pid	Process
1984	schtasks.exe
4744	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	384	5d492a1ee6301ae5b39955cb1c0cc2258de52313d7882f3ad95ac59661a7874dN.exe
Token: SeDebugPrivilege	4724	Client.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
4724	Client.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
4724	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4724	Client.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 384 wrote to memory of 1984	384	5d492a1ee6301ae5b39955cb1c0cc2258de52313d7882f3ad95ac59661a7874dN.exe	82
PID 384 wrote to memory of 1984	384	5d492a1ee6301ae5b39955cb1c0cc2258de52313d7882f3ad95ac59661a7874dN.exe	82
PID 384 wrote to memory of 4724	384	5d492a1ee6301ae5b39955cb1c0cc2258de52313d7882f3ad95ac59661a7874dN.exe	84
PID 384 wrote to memory of 4724	384	5d492a1ee6301ae5b39955cb1c0cc2258de52313d7882f3ad95ac59661a7874dN.exe	84
PID 4724 wrote to memory of 4744	4724	Client.exe	85
PID 4724 wrote to memory of 4744	4724	Client.exe	85

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\5d492a1ee6301ae5b39955cb1c0cc2258de52313d7882f3ad95ac59661a7874dN.exe
"C:\Users\Admin\AppData\Local\Temp\5d492a1ee6301ae5b39955cb1c0cc2258de52313d7882f3ad95ac59661a7874dN.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:384
- 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:1984
- 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
  - Suspicious use of WriteProcessMemory
  PID:4724
- - 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:4744

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

1

T1082

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
f9e97e1d0baab5246233fca2eea990a0

SHA1
06b2a0eb80616eae7a9c259e8919ce7c0fb5c5a2

SHA256
5d492a1ee6301ae5b39955cb1c0cc2258de52313d7882f3ad95ac59661a7874d

SHA512
117eb156be6ba2c50871878c4460e636d56ac6b08b04cc164314cf16269a5f395234c37bf558ce6b2fac179fd1003d24de8373f1892ec69788370784de339192

Download Submit
memory/384-0-0x00007FF857523000-0x00007FF857525000-memory.dmp

Filesize
8KB

Download
memory/384-1-0x0000000000750000-0x0000000000A74000-memory.dmp

Filesize
3.1MB

Download
memory/384-2-0x00007FF857520000-0x00007FF857FE1000-memory.dmp

Filesize
10.8MB

Download
memory/384-9-0x00007FF857520000-0x00007FF857FE1000-memory.dmp

Filesize
10.8MB

Download
memory/4724-10-0x00007FF857520000-0x00007FF857FE1000-memory.dmp

Filesize
10.8MB

Download
memory/4724-11-0x00007FF857520000-0x00007FF857FE1000-memory.dmp

Filesize
10.8MB

Download
memory/4724-12-0x000000001E450000-0x000000001E4A0000-memory.dmp

Filesize
320KB

Download
memory/4724-13-0x000000001E560000-0x000000001E612000-memory.dmp

Filesize
712KB

Download
memory/4724-14-0x00007FF857520000-0x00007FF857FE1000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads