quasar | fc0afaabeb1bec166e86302143e2ae0387142cc17df7a8980c8b7a9de43aad67

Analysis

max time kernel
150s
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
28-12-2024 02:59

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

fc0afaabeb1bec166e86302143e2ae0387142cc17df7a8980c8b7a9de43aad67.exe
Size

3.1MB
MD5

ef4d8a6e9965bc6bb50cc1dfc5afde69
SHA1

22dc66b0dec9e655fc049063eb9ed1ac40163d63
SHA256

fc0afaabeb1bec166e86302143e2ae0387142cc17df7a8980c8b7a9de43aad67
SHA512

681ee20aebd9e6c39004cf79c25a06c88f969ed2891dc46323314d9fedbe99799894deb88a4df3175f93787c37b5b2037050becf04280669b5499c649a25c9e9
SSDEEP

49152:+vIt62XlaSFNWPjljiFa2RoUYICH/aEfpKk/YFsoGdzbTHHB72eh2NT:+vE62XlaSFNWPjljiFXRoUYICH/umj

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

192.168.137.1:4782

Mutex

c9e46391-a513-481f-850c-0575d9434d9b

Attributes

encryption_key
08BB821083C178CF94367793848CD70209AA4A6C
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
cheats
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/4832-1-0x0000000000DE0000-0x0000000001104000-memory.dmp	family_quasar
behavioral2/files/0x0008000000023cbd-5.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
3460	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
3248	schtasks.exe
3896	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4832	fc0afaabeb1bec166e86302143e2ae0387142cc17df7a8980c8b7a9de43aad67.exe
Token: SeDebugPrivilege	3460	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3460	Client.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4832 wrote to memory of 3248	4832	fc0afaabeb1bec166e86302143e2ae0387142cc17df7a8980c8b7a9de43aad67.exe	85
PID 4832 wrote to memory of 3248	4832	fc0afaabeb1bec166e86302143e2ae0387142cc17df7a8980c8b7a9de43aad67.exe	85
PID 4832 wrote to memory of 3460	4832	fc0afaabeb1bec166e86302143e2ae0387142cc17df7a8980c8b7a9de43aad67.exe	87
PID 4832 wrote to memory of 3460	4832	fc0afaabeb1bec166e86302143e2ae0387142cc17df7a8980c8b7a9de43aad67.exe	87
PID 3460 wrote to memory of 3896	3460	Client.exe	88
PID 3460 wrote to memory of 3896	3460	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\fc0afaabeb1bec166e86302143e2ae0387142cc17df7a8980c8b7a9de43aad67.exe
"C:\Users\Admin\AppData\Local\Temp\fc0afaabeb1bec166e86302143e2ae0387142cc17df7a8980c8b7a9de43aad67.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4832
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "cheats" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:3248
- 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:3460
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "cheats" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:3896

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

Loading Replay Monitor...

Downloads

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

Filesize
3.1MB

MD5
ef4d8a6e9965bc6bb50cc1dfc5afde69

SHA1
22dc66b0dec9e655fc049063eb9ed1ac40163d63

SHA256
fc0afaabeb1bec166e86302143e2ae0387142cc17df7a8980c8b7a9de43aad67

SHA512
681ee20aebd9e6c39004cf79c25a06c88f969ed2891dc46323314d9fedbe99799894deb88a4df3175f93787c37b5b2037050becf04280669b5499c649a25c9e9

Download Submit
memory/3460-9-0x00007FF976220000-0x00007FF976CE1000-memory.dmp

Filesize
10.8MB

Download
memory/3460-10-0x00007FF976220000-0x00007FF976CE1000-memory.dmp

Filesize
10.8MB

Download
memory/3460-11-0x000000001C160000-0x000000001C1B0000-memory.dmp

Filesize
320KB

Download
memory/3460-12-0x000000001C270000-0x000000001C322000-memory.dmp

Filesize
712KB

Download
memory/3460-13-0x00007FF976220000-0x00007FF976CE1000-memory.dmp

Filesize
10.8MB

Download
memory/4832-0-0x00007FF976223000-0x00007FF976225000-memory.dmp

Filesize
8KB

Download
memory/4832-1-0x0000000000DE0000-0x0000000001104000-memory.dmp

Filesize
3.1MB

Download
memory/4832-2-0x00007FF976220000-0x00007FF976CE1000-memory.dmp

Filesize
10.8MB

Download
memory/4832-8-0x00007FF976220000-0x00007FF976CE1000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads