quasar | 4fa37e700c2b9ee257995cc82ad1f02b02bf5b031a5fda15ff34277c82239d8a

Resubmissions

30-10-2024 00:08

241030-ae58hsself 10

Analysis

max time kernel
594s
max time network
601s
platform
windows10-ltsc 2021_x64
resource
win10ltsc2021-20241023-en
resource tags

arch:x64arch:x86image:win10ltsc2021-20241023-enlocale:en-usos:windows10-ltsc 2021-x64system
submitted
30-10-2024 00:08

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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
behavioral2/memory/3256-1-0x0000000000390000-0x00000000006B4000-memory.dmp	family_quasar
behavioral2/files/0x002800000004507b-3.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
220	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
240	schtasks.exe
1692	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3256	PermWoofer.exe
Token: SeDebugPrivilege	220	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
220	Client.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3256 wrote to memory of 240	3256	PermWoofer.exe	81
PID 3256 wrote to memory of 240	3256	PermWoofer.exe	81
PID 3256 wrote to memory of 220	3256	PermWoofer.exe	83
PID 3256 wrote to memory of 220	3256	PermWoofer.exe	83
PID 220 wrote to memory of 1692	220	Client.exe	84
PID 220 wrote to memory of 1692	220	Client.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\Spoofers\PermWoofer.exe
"C:\Users\Admin\AppData\Local\Temp\Spoofers\PermWoofer.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3256
- 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:240
- 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:220
- - 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:1692

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/220-6-0x00007FFBE7BE0000-0x00007FFBE86A2000-memory.dmp

Filesize
10.8MB

Download
memory/220-7-0x00007FFBE7BE0000-0x00007FFBE86A2000-memory.dmp

Filesize
10.8MB

Download
memory/220-8-0x000000001E310000-0x000000001E360000-memory.dmp

Filesize
320KB

Download
memory/220-9-0x000000001E420000-0x000000001E4D2000-memory.dmp

Filesize
712KB

Download
memory/220-10-0x00007FFBE7BE0000-0x00007FFBE86A2000-memory.dmp

Filesize
10.8MB

Download
memory/3256-0-0x00007FFBE7BE3000-0x00007FFBE7BE5000-memory.dmp

Filesize
8KB

Download
memory/3256-1-0x0000000000390000-0x00000000006B4000-memory.dmp

Filesize
3.1MB

Download
memory/3256-2-0x00007FFBE7BE0000-0x00007FFBE86A2000-memory.dmp

Filesize
10.8MB

Download
memory/3256-5-0x00007FFBE7BE0000-0x00007FFBE86A2000-memory.dmp

Filesize
10.8MB

Download

Resubmissions

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads