quasar | bd9186067b25314d001deafe0c04b1605d2e9397f2cf03a14dc55bb2d2deb9b1

Analysis

max time kernel
21s
max time network
34s
platform
windows11-21h2_x64
resource
win11-20241007-en
resource tags

arch:x64arch:x86image:win11-20241007-enlocale:en-usos:windows11-21h2-x64system
submitted
22-10-2024 05:48

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General

Target

ImageLogger.exe
Size

3.1MB
MD5

28e71624fcfe80204a17264a70dc67af
SHA1

4e93d0d3c794a440cfb61183278dd0e9ef5d8b89
SHA256

bd9186067b25314d001deafe0c04b1605d2e9397f2cf03a14dc55bb2d2deb9b1
SHA512

60ddfeb7ea5e732a6c4ab0721dd1ce0b6e22f703e4e189541fba885b27028e96defea857adaa185768e7c8f9fdbf9337cb813c2b53dcddf22a19764b242c122d
SSDEEP

49152:3v+lL26AaNeWgPhlmVqvMQ7XSKZPmG1J5qoGd8SZTHHB72eh2NT:3vuL26AaNeWgPhlmVqkQ7XSKZPmxsS

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

Aynamit-48932.portmap.host:48932

Mutex

284f5603-b66c-4807-97d1-0bb950e3432b

Attributes

encryption_key
9AC1025D56EC4126A65E9308F55AF68D48E80A59
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 payload 2 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2888-1-0x0000000000680000-0x00000000009A4000-memory.dmp	family_quasar
behavioral1/files/0x001b00000002ab18-6.dat	family_quasar

Executes dropped EXE 1 IoCs

Processes:

Client.exe

pid	Process
5936	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

Processes:

schtasks.exeschtasks.exe

pid	Process
1920	schtasks.exe
2472	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

ImageLogger.exeClient.exe

description	pid	Process
Token: SeDebugPrivilege	2888	ImageLogger.exe
Token: SeDebugPrivilege	5936	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

Client.exe

pid	Process
5936	Client.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

ImageLogger.exeClient.exe

description	pid	Process	procid_target
PID 2888 wrote to memory of 1920	2888	ImageLogger.exe	77
PID 2888 wrote to memory of 1920	2888	ImageLogger.exe	77
PID 2888 wrote to memory of 5936	2888	ImageLogger.exe	79
PID 2888 wrote to memory of 5936	2888	ImageLogger.exe	79
PID 5936 wrote to memory of 2472	5936	Client.exe	80
PID 5936 wrote to memory of 2472	5936	Client.exe	80

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\ImageLogger.exe
"C:\Users\Admin\AppData\Local\Temp\ImageLogger.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2888
- 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:1920
- 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:5936
- - 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
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2472

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

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Roaming\SubDir\Client.exe

Filesize
3.1MB

MD5
28e71624fcfe80204a17264a70dc67af

SHA1
4e93d0d3c794a440cfb61183278dd0e9ef5d8b89

SHA256
bd9186067b25314d001deafe0c04b1605d2e9397f2cf03a14dc55bb2d2deb9b1

SHA512
60ddfeb7ea5e732a6c4ab0721dd1ce0b6e22f703e4e189541fba885b27028e96defea857adaa185768e7c8f9fdbf9337cb813c2b53dcddf22a19764b242c122d

Download Submit
memory/2888-0-0x00007FF83F033000-0x00007FF83F035000-memory.dmp

Filesize
8KB

Download
memory/2888-1-0x0000000000680000-0x00000000009A4000-memory.dmp

Filesize
3.1MB

Download
memory/2888-2-0x00007FF83F030000-0x00007FF83FAF2000-memory.dmp

Filesize
10.8MB

Download
memory/2888-9-0x00007FF83F030000-0x00007FF83FAF2000-memory.dmp

Filesize
10.8MB

Download
memory/5936-11-0x00007FF83F030000-0x00007FF83FAF2000-memory.dmp

Filesize
10.8MB

Download
memory/5936-10-0x00007FF83F030000-0x00007FF83FAF2000-memory.dmp

Filesize
10.8MB

Download
memory/5936-12-0x000000001B9C0000-0x000000001BA10000-memory.dmp

Filesize
320KB

Download
memory/5936-13-0x000000001BAD0000-0x000000001BB82000-memory.dmp

Filesize
712KB

Download
memory/5936-16-0x000000001BA50000-0x000000001BA62000-memory.dmp

Filesize
72KB

Download
memory/5936-17-0x000000001C5E0000-0x000000001C61C000-memory.dmp

Filesize
240KB

Download
memory/5936-18-0x00007FF83F030000-0x00007FF83FAF2000-memory.dmp

Filesize
10.8MB

Download
memory/5936-19-0x00007FF83F030000-0x00007FF83FAF2000-memory.dmp

Filesize
10.8MB

Download