quasar | 60ac690951bfa03d45f16263b048fa3278af29159ac2c55a7bd9873dfc7692e7

General

Target

60ac690951bfa03d45f16263b048fa3278af29159ac2c55a7bd9873dfc7692e7.exe
Size

3.1MB
MD5

76713b69cffe02600f96fd51f0b266d5
SHA1

742249403d8f9d939c69837e20382c6ea04eaf5c
SHA256

60ac690951bfa03d45f16263b048fa3278af29159ac2c55a7bd9873dfc7692e7
SHA512

d3a9b90f11e2595903ea27dac20adaf63846ca70c613b867ee455825bbfc124cf05b364464176034d6fd7413923a65e653371993406554f1b22590a1bfc7a3c1
SSDEEP

49152:rvgz92YpaQI6oPZlhP3ReybewogVRJ6ObR3LoGdITHHB72eh2NT9:rv692YpaQI6oPZlhP3YybewogVRJ6I3

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/2664-1-0x0000000000B10000-0x0000000000E34000-memory.dmp	family_quasar
behavioral2/files/0x000a000000023b93-6.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
4168	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
1692	schtasks.exe
1820	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2664	60ac690951bfa03d45f16263b048fa3278af29159ac2c55a7bd9873dfc7692e7.exe
Token: SeDebugPrivilege	4168	Client.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
4168	Client.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
4168	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4168	Client.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2664 wrote to memory of 1692	2664	60ac690951bfa03d45f16263b048fa3278af29159ac2c55a7bd9873dfc7692e7.exe	85
PID 2664 wrote to memory of 1692	2664	60ac690951bfa03d45f16263b048fa3278af29159ac2c55a7bd9873dfc7692e7.exe	85
PID 2664 wrote to memory of 4168	2664	60ac690951bfa03d45f16263b048fa3278af29159ac2c55a7bd9873dfc7692e7.exe	87
PID 2664 wrote to memory of 4168	2664	60ac690951bfa03d45f16263b048fa3278af29159ac2c55a7bd9873dfc7692e7.exe	87
PID 4168 wrote to memory of 1820	4168	Client.exe	88
PID 4168 wrote to memory of 1820	4168	Client.exe	88

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\60ac690951bfa03d45f16263b048fa3278af29159ac2c55a7bd9873dfc7692e7.exe
"C:\Users\Admin\AppData\Local\Temp\60ac690951bfa03d45f16263b048fa3278af29159ac2c55a7bd9873dfc7692e7.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2664
- 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:1692
- 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:4168
- - 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:1820

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
76713b69cffe02600f96fd51f0b266d5

SHA1
742249403d8f9d939c69837e20382c6ea04eaf5c

SHA256
60ac690951bfa03d45f16263b048fa3278af29159ac2c55a7bd9873dfc7692e7

SHA512
d3a9b90f11e2595903ea27dac20adaf63846ca70c613b867ee455825bbfc124cf05b364464176034d6fd7413923a65e653371993406554f1b22590a1bfc7a3c1

Download Submit
memory/2664-0-0x00007FFE174C3000-0x00007FFE174C5000-memory.dmp

Filesize
8KB

Download
memory/2664-1-0x0000000000B10000-0x0000000000E34000-memory.dmp

Filesize
3.1MB

Download
memory/2664-2-0x00007FFE174C0000-0x00007FFE17F81000-memory.dmp

Filesize
10.8MB

Download
memory/2664-10-0x00007FFE174C0000-0x00007FFE17F81000-memory.dmp

Filesize
10.8MB

Download
memory/4168-9-0x00007FFE174C0000-0x00007FFE17F81000-memory.dmp

Filesize
10.8MB

Download
memory/4168-11-0x00007FFE174C0000-0x00007FFE17F81000-memory.dmp

Filesize
10.8MB

Download
memory/4168-12-0x000000001C240000-0x000000001C290000-memory.dmp

Filesize
320KB

Download
memory/4168-13-0x000000001C350000-0x000000001C402000-memory.dmp

Filesize
712KB

Download
memory/4168-14-0x00007FFE174C0000-0x00007FFE17F81000-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