quasar | 75839e01d7cefbc61128320ce8ddb7643acd04a4e58e1903a746faea3f9651fc

Analysis

max time kernel
38s
max time network
39s
platform
windows10-2004_x64
resource
win10v2004-20250314-en
resource tags

arch:x64arch:x86image:win10v2004-20250314-enlocale:en-usos:windows10-2004-x64system
submitted
22/03/2025, 01:01

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General

Target

o1tz27zvvd.exe
Size

521KB
MD5

5530bc12643d20c6a8a04217250b7060
SHA1

b0339211d2e646438bb46e8619ede30756d043dd
SHA256

75839e01d7cefbc61128320ce8ddb7643acd04a4e58e1903a746faea3f9651fc
SHA512

d40859281130c205dcf2fe6dd59fc5ae6ecf6ac3134db87211a20e3f088c547df0635c5f891021078d23f2768c1bfa35710cd618307878bdbcc65159c8c9da11
SSDEEP

12288:F91VwQAOsgf5vFHa4JLEliXh+OdyB0oMGTeYZFX:KOsgnHDJLEfOdy1dFX

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.5.0

Botnet

Office04

movies-concerning.gl.at.ply.gg:12712

Mutex

5f7b0195-4eaf-4ae9-b4f8-cc2f6f6c4eb3

Attributes

encryption_key
27AAC11A05508545506D258070495FCDA9A82735
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Quasar Modded 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/3032-6-0x000001D3F9190000-0x000001D3F9220000-memory.dmp	family_quasar
behavioral2/memory/3032-7-0x000001D3F8C60000-0x000001D3F8C78000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
4948	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
5032	schtasks.exe
4156	schtasks.exe

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
4948	Client.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
3032	o1tz27zvvd.exe
3032	o1tz27zvvd.exe
4948	Client.exe
4948	Client.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3032	o1tz27zvvd.exe
Token: SeDebugPrivilege	4948	Client.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3032 wrote to memory of 5032	3032	o1tz27zvvd.exe	90
PID 3032 wrote to memory of 5032	3032	o1tz27zvvd.exe	90
PID 3032 wrote to memory of 4948	3032	o1tz27zvvd.exe	92
PID 3032 wrote to memory of 4948	3032	o1tz27zvvd.exe	92
PID 4948 wrote to memory of 4156	4948	Client.exe	97
PID 4948 wrote to memory of 4156	4948	Client.exe	97

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\o1tz27zvvd.exe
"C:\Users\Admin\AppData\Local\Temp\o1tz27zvvd.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3032
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "Quasar Modded Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:5032
- C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
  "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious behavior: AddClipboardFormatListener
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4948
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "Quasar Modded Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:4156

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
521KB

MD5
5530bc12643d20c6a8a04217250b7060

SHA1
b0339211d2e646438bb46e8619ede30756d043dd

SHA256
75839e01d7cefbc61128320ce8ddb7643acd04a4e58e1903a746faea3f9651fc

SHA512
d40859281130c205dcf2fe6dd59fc5ae6ecf6ac3134db87211a20e3f088c547df0635c5f891021078d23f2768c1bfa35710cd618307878bdbcc65159c8c9da11

Download Submit
memory/3032-5-0x00007FF720940000-0x00007FF7209C5000-memory.dmp

Filesize
532KB

Download
memory/3032-3-0x000001D3F8A70000-0x000001D3F8B05000-memory.dmp

Filesize
596KB

Download
memory/3032-1-0x00007FF720940000-0x00007FF7209C5000-memory.dmp

Filesize
532KB

Download
memory/3032-6-0x000001D3F9190000-0x000001D3F9220000-memory.dmp

Filesize
576KB

Download
memory/3032-7-0x000001D3F8C60000-0x000001D3F8C78000-memory.dmp

Filesize
96KB

Download
memory/3032-0-0x00007FF72094F000-0x00007FF720950000-memory.dmp

Filesize
4KB

Download
memory/4948-14-0x00007FF7C4530000-0x00007FF7C45B5000-memory.dmp

Filesize
532KB

Download
memory/4948-18-0x00007FF7C4530000-0x00007FF7C45B5000-memory.dmp

Filesize
532KB

Download
memory/4948-19-0x000001DE69800000-0x000001DE69850000-memory.dmp

Filesize
320KB

Download
memory/4948-20-0x000001DE69A90000-0x000001DE69B42000-memory.dmp

Filesize
712KB

Download
memory/4948-21-0x000001DE697B0000-0x000001DE697FE000-memory.dmp

Filesize
312KB

Download
memory/4948-24-0x000001DE69990000-0x000001DE699A2000-memory.dmp

Filesize
72KB

Download
memory/4948-25-0x000001DE69A10000-0x000001DE69A4C000-memory.dmp

Filesize
240KB

Download