quasar | 138ab3d7129533eeeb90d9595fd199fc8f678511fb53a41836e912f5ef7c9591

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
30-01-2025 05:46

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General

Target

138ab3d7129533eeeb90d9595fd199fc8f678511fb53a41836e912f5ef7c9591.exe
Size

3.1MB
MD5

097568748bb3dc42a29f6982d1fc4ac3
SHA1

b7e45e9dd14adc29d59eca162c57d747ad229fcb
SHA256

138ab3d7129533eeeb90d9595fd199fc8f678511fb53a41836e912f5ef7c9591
SHA512

22ecd01b0534718b19d9af0bf369184c8e703e7ad76ef6ed49f7168d1ede3f512311aca9ce5de2b32cac016377bf84529f5b05a26b88c85bb303142445cf3698
SSDEEP

49152:3vXI22SsaNYfdPBldt698dBcjH0tk+GoGZyTHHB72eh2NT:3vY22SsaNYfdPBldt6+dBcjHEk1

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

81.161.238.80:4444

Mutex

4e2e78da-feaf-429e-aac4-9ee8a177bbf1

Attributes

encryption_key
F67E99F78BCB3DE5163C575051A85C1166CAAB55
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 1 IoCs

resource	yara_rule
behavioral2/memory/4772-1-0x00000000009F0000-0x0000000000D14000-memory.dmp	family_quasar

Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

pid	Process
2832	schtasks.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4772	138ab3d7129533eeeb90d9595fd199fc8f678511fb53a41836e912f5ef7c9591.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 4772 wrote to memory of 2832	4772	138ab3d7129533eeeb90d9595fd199fc8f678511fb53a41836e912f5ef7c9591.exe	84
PID 4772 wrote to memory of 2832	4772	138ab3d7129533eeeb90d9595fd199fc8f678511fb53a41836e912f5ef7c9591.exe	84

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\138ab3d7129533eeeb90d9595fd199fc8f678511fb53a41836e912f5ef7c9591.exe
"C:\Users\Admin\AppData\Local\Temp\138ab3d7129533eeeb90d9595fd199fc8f678511fb53a41836e912f5ef7c9591.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4772
- 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:2832

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

memory/4772-0-0x00007FFA29163000-0x00007FFA29165000-memory.dmp

Filesize
8KB

Download
memory/4772-1-0x00000000009F0000-0x0000000000D14000-memory.dmp

Filesize
3.1MB

Download
memory/4772-2-0x00007FFA29160000-0x00007FFA29C21000-memory.dmp

Filesize
10.8MB

Download
memory/4772-3-0x0000000002FA0000-0x0000000002FF0000-memory.dmp

Filesize
320KB

Download
memory/4772-4-0x000000001D9A0000-0x000000001DA52000-memory.dmp

Filesize
712KB

Download
memory/4772-5-0x00007FFA29163000-0x00007FFA29165000-memory.dmp

Filesize
8KB

Download
memory/4772-6-0x00007FFA29160000-0x00007FFA29C21000-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