quasar | 4fa37e700c2b9ee257995cc82ad1f02b02bf5b031a5fda15ff34277c82239d8a

Analysis

max time kernel
149s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
30-10-2024 00:29

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General

Target

Spoofers/PermWoofer.exe
Size

3.1MB
MD5

b4ac68d3c6cc89ae97e519b9a7241bba
SHA1

ced8a4dec2238bc5f2b7ca9ef9fdac0a6cd9108f
SHA256

03bc2c340a1081e1521a5c4b92c38756f4de234ac1b1a578556d83737972e343
SHA512

8870741c08574945ea43055e6031394af96290348e4e55d3570f937020c49020fc7d61517d9ab9dd42fc65066ba113cb8a31f2d45cff7f7301f8e865d52aa1d5
SSDEEP

49152:Kvkt62XlaSFNWPjljiFa2RoUYIibRJ60bR3LoGdjTHHB72eh2NT:Kv462XlaSFNWPjljiFXRoUYIibRJ6+

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

192.168.1.28:4782

Mutex

03ef2b9a-5389-4312-b3d3-9b6f68cc5386

Attributes

encryption_key
F8A900CD75D848E74023B3A66FA8AA5469C97692
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
ahhaa
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
behavioral4/memory/4060-1-0x0000000000480000-0x00000000007A4000-memory.dmp	family_quasar
behavioral4/files/0x0007000000023c9b-6.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
672	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
3192	schtasks.exe
2888	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4060	PermWoofer.exe
Token: SeDebugPrivilege	672	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
672	Client.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4060 wrote to memory of 3192	4060	PermWoofer.exe	87
PID 4060 wrote to memory of 3192	4060	PermWoofer.exe	87
PID 4060 wrote to memory of 672	4060	PermWoofer.exe	89
PID 4060 wrote to memory of 672	4060	PermWoofer.exe	89
PID 672 wrote to memory of 2888	672	Client.exe	90
PID 672 wrote to memory of 2888	672	Client.exe	90

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\Spoofers\PermWoofer.exe
"C:\Users\Admin\AppData\Local\Temp\Spoofers\PermWoofer.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4060
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "ahhaa" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:3192
- 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:672
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "ahhaa" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2888

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
3.1MB

MD5
b4ac68d3c6cc89ae97e519b9a7241bba

SHA1
ced8a4dec2238bc5f2b7ca9ef9fdac0a6cd9108f

SHA256
03bc2c340a1081e1521a5c4b92c38756f4de234ac1b1a578556d83737972e343

SHA512
8870741c08574945ea43055e6031394af96290348e4e55d3570f937020c49020fc7d61517d9ab9dd42fc65066ba113cb8a31f2d45cff7f7301f8e865d52aa1d5

Download Submit
memory/672-9-0x00007FFA24460000-0x00007FFA24F21000-memory.dmp

Filesize
10.8MB

Download
memory/672-11-0x00007FFA24460000-0x00007FFA24F21000-memory.dmp

Filesize
10.8MB

Download
memory/672-12-0x000000001C570000-0x000000001C5C0000-memory.dmp

Filesize
320KB

Download
memory/672-13-0x000000001C680000-0x000000001C732000-memory.dmp

Filesize
712KB

Download
memory/672-14-0x00007FFA24460000-0x00007FFA24F21000-memory.dmp

Filesize
10.8MB

Download
memory/4060-0-0x00007FFA24463000-0x00007FFA24465000-memory.dmp

Filesize
8KB

Download
memory/4060-1-0x0000000000480000-0x00000000007A4000-memory.dmp

Filesize
3.1MB

Download
memory/4060-2-0x00007FFA24460000-0x00007FFA24F21000-memory.dmp

Filesize
10.8MB

Download
memory/4060-10-0x00007FFA24460000-0x00007FFA24F21000-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