quasar | 8b507e7ba319bcbf1a13540ec20ad4f31d667a6a1cc99e091fc2f74066123c78

Analysis

max time kernel
1795s
max time network
1799s
platform
windows11-21h2_x64
resource
win11-20241007-en
resource tags

arch:x64arch:x86image:win11-20241007-enlocale:en-usos:windows11-21h2-x64system
submitted
15-12-2024 03:03

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General

Target

poo virus grr/activate virus [logs ur device].exe
Size

3.1MB
MD5

7f604852d7713ce48e754d05cfdb9c2e
SHA1

8caa2ea8644f0014d8949edf576b008de2fcde75
SHA256

db706cddf84bb9d83cda2cc00e6832e26daa6592eef27fc37d39eccdc683e5d4
SHA512

a36e50b1426e990c1130a309bf453657561b646b3160c1e3a3f4d46b02bf24706982f635be627521a909a61b8fa57f0fbcc108cb1c340a37f86725bc38454ef7
SSDEEP

49152:DvyI22SsaNYfdPBldt698dBcjHDXUue8LzCoGhtTHHB72eh2NT:Dvf22SsaNYfdPBldt6+dBcjHDXUu0

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

181.99.66.83:4782

Mutex

7b23506c-ff83-4362-93b4-b99c14429834

Attributes

encryption_key
7A8E2417AD5EAA788488BDF81FE6CACB01258933
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/3640-1-0x0000000000670000-0x0000000000994000-memory.dmp	family_quasar
behavioral2/files/0x002000000002ab00-6.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
3492	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
3456	schtasks.exe
2908	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3640	activate virus [logs ur device].exe
Token: SeDebugPrivilege	3492	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3492	Client.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3640 wrote to memory of 3456	3640	activate virus [logs ur device].exe	77
PID 3640 wrote to memory of 3456	3640	activate virus [logs ur device].exe	77
PID 3640 wrote to memory of 3492	3640	activate virus [logs ur device].exe	79
PID 3640 wrote to memory of 3492	3640	activate virus [logs ur device].exe	79
PID 3492 wrote to memory of 2908	3492	Client.exe	80
PID 3492 wrote to memory of 2908	3492	Client.exe	80

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\poo virus grr\activate virus [logs ur device].exe
"C:\Users\Admin\AppData\Local\Temp\poo virus grr\activate virus [logs ur device].exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3640
- 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:3456
- 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:3492
- - 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:2908

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

Replay Monitor

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Downloads

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

Filesize
3.1MB

MD5
7f604852d7713ce48e754d05cfdb9c2e

SHA1
8caa2ea8644f0014d8949edf576b008de2fcde75

SHA256
db706cddf84bb9d83cda2cc00e6832e26daa6592eef27fc37d39eccdc683e5d4

SHA512
a36e50b1426e990c1130a309bf453657561b646b3160c1e3a3f4d46b02bf24706982f635be627521a909a61b8fa57f0fbcc108cb1c340a37f86725bc38454ef7

Download Submit
memory/3492-9-0x00007FFA87760000-0x00007FFA88222000-memory.dmp

Filesize
10.8MB

Download
memory/3492-11-0x00007FFA87760000-0x00007FFA88222000-memory.dmp

Filesize
10.8MB

Download
memory/3492-12-0x000000001CA10000-0x000000001CA60000-memory.dmp

Filesize
320KB

Download
memory/3492-13-0x000000001CB20000-0x000000001CBD2000-memory.dmp

Filesize
712KB

Download
memory/3492-14-0x00007FFA87760000-0x00007FFA88222000-memory.dmp

Filesize
10.8MB

Download
memory/3640-0-0x00007FFA87763000-0x00007FFA87765000-memory.dmp

Filesize
8KB

Download
memory/3640-1-0x0000000000670000-0x0000000000994000-memory.dmp

Filesize
3.1MB

Download
memory/3640-2-0x00007FFA87760000-0x00007FFA88222000-memory.dmp

Filesize
10.8MB

Download
memory/3640-10-0x00007FFA87760000-0x00007FFA88222000-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