quasar | e119fe767f3d10a387df1951d4b356384c5a9d0441b4034ddf7293c389a410b4

Analysis

max time kernel
149s
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
17-12-2024 05:09

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General

Target

e119fe767f3d10a387df1951d4b356384c5a9d0441b4034ddf7293c389a410b4.exe
Size

3.1MB
MD5

6a0bb84dcd837e83638f4292180bf5ab
SHA1

20e31ccffe1ac806e75ea839ea90b4c91e4322c5
SHA256

e119fe767f3d10a387df1951d4b356384c5a9d0441b4034ddf7293c389a410b4
SHA512

d0d61815c1ca73e4d1b8d5c3ea61e0572bfa9f6e984247b8e66c22e5591d61f766c6476c2686ce611917a56f2d4d8b8ddb4efcdbed707855e4190a2404eedcc5
SSDEEP

49152:Ovkt62XlaSFNWPjljiFa2RoUYIUOzML6oGd4y/THHB72eh2NT:Ov462XlaSFNWPjljiFXRoUYIpzMG

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

192.168.43.241:4782

Mutex

0517af80-95f0-4a6d-a904-5b7ee8faa157

Attributes

encryption_key
6095BF6D5D58D02597F98370DFD1CCEB782F1EDD
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
svhost
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/4572-1-0x00000000004D0000-0x00000000007F4000-memory.dmp	family_quasar
behavioral2/files/0x000a000000023b93-6.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
4644	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
1476	schtasks.exe
1540	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4572	e119fe767f3d10a387df1951d4b356384c5a9d0441b4034ddf7293c389a410b4.exe
Token: SeDebugPrivilege	4644	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4644	Client.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4572 wrote to memory of 1476	4572	e119fe767f3d10a387df1951d4b356384c5a9d0441b4034ddf7293c389a410b4.exe	85
PID 4572 wrote to memory of 1476	4572	e119fe767f3d10a387df1951d4b356384c5a9d0441b4034ddf7293c389a410b4.exe	85
PID 4572 wrote to memory of 4644	4572	e119fe767f3d10a387df1951d4b356384c5a9d0441b4034ddf7293c389a410b4.exe	87
PID 4572 wrote to memory of 4644	4572	e119fe767f3d10a387df1951d4b356384c5a9d0441b4034ddf7293c389a410b4.exe	87
PID 4644 wrote to memory of 1540	4644	Client.exe	88
PID 4644 wrote to memory of 1540	4644	Client.exe	88

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\e119fe767f3d10a387df1951d4b356384c5a9d0441b4034ddf7293c389a410b4.exe
"C:\Users\Admin\AppData\Local\Temp\e119fe767f3d10a387df1951d4b356384c5a9d0441b4034ddf7293c389a410b4.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4572
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "svhost" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:1476
- 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:4644
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "svhost" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:1540

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
6a0bb84dcd837e83638f4292180bf5ab

SHA1
20e31ccffe1ac806e75ea839ea90b4c91e4322c5

SHA256
e119fe767f3d10a387df1951d4b356384c5a9d0441b4034ddf7293c389a410b4

SHA512
d0d61815c1ca73e4d1b8d5c3ea61e0572bfa9f6e984247b8e66c22e5591d61f766c6476c2686ce611917a56f2d4d8b8ddb4efcdbed707855e4190a2404eedcc5

Download Submit
memory/4572-0-0x00007FFE174C3000-0x00007FFE174C5000-memory.dmp

Filesize
8KB

Download
memory/4572-1-0x00000000004D0000-0x00000000007F4000-memory.dmp

Filesize
3.1MB

Download
memory/4572-2-0x00007FFE174C0000-0x00007FFE17F81000-memory.dmp

Filesize
10.8MB

Download
memory/4572-9-0x00007FFE174C0000-0x00007FFE17F81000-memory.dmp

Filesize
10.8MB

Download
memory/4644-10-0x00007FFE174C0000-0x00007FFE17F81000-memory.dmp

Filesize
10.8MB

Download
memory/4644-11-0x00007FFE174C0000-0x00007FFE17F81000-memory.dmp

Filesize
10.8MB

Download
memory/4644-12-0x000000001B780000-0x000000001B7D0000-memory.dmp

Filesize
320KB

Download
memory/4644-13-0x000000001C100000-0x000000001C1B2000-memory.dmp

Filesize
712KB

Download
memory/4644-14-0x00007FFE174C0000-0x00007FFE17F81000-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