quasar | 5ff2becf2c56500cb71898f661c863e647a96af33db38d84d7921dc7dbf4f642

General

Target

5ff2becf2c56500cb71898f661c863e647a96af33db38d84d7921dc7dbf4f642.exe
Size

3.1MB
MD5

ff8c68c60f122eb7f8473106d4bcf26c
SHA1

0efa03e7412e7e15868c93604372d2b2e6b80662
SHA256

5ff2becf2c56500cb71898f661c863e647a96af33db38d84d7921dc7dbf4f642
SHA512

ab92ef844a015c3fcbfba313872b922bff54184b25623ed34f4829bd66a95af081cdeefd35425a4d3b9d9085ccf8c25045cf6093d74a5c8c35012c1b7546688e
SSDEEP

49152:XvPD/2oga6ctePEl3s3jn7HZkgoZbnmz9QnGdBTHHB72eh2NT:XvL/2oga6ctePEl3s3L7HZkgoZbb

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

193.161.193.99:20466

Mutex

62455511-c72a-4743-bad9-b518c9ed4b32

Attributes

encryption_key
CE4DD36EB249EF1D16AFC772A047491835C33346
install_name
Windows Defender SmartScreen (32 bit).exe
log_directory
Logs
reconnect_delay
3000
startup_key
Server Client Startup
subdirectory
WindowsLockerZAP

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/4972-1-0x0000000000AD0000-0x0000000000DF4000-memory.dmp	family_quasar
behavioral2/files/0x0007000000023c88-6.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
3648	Windows Defender SmartScreen (32 bit).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
4144	schtasks.exe
3548	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4972	5ff2becf2c56500cb71898f661c863e647a96af33db38d84d7921dc7dbf4f642.exe
Token: SeDebugPrivilege	3648	Windows Defender SmartScreen (32 bit).exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3648	Windows Defender SmartScreen (32 bit).exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4972 wrote to memory of 3548	4972	5ff2becf2c56500cb71898f661c863e647a96af33db38d84d7921dc7dbf4f642.exe	82
PID 4972 wrote to memory of 3548	4972	5ff2becf2c56500cb71898f661c863e647a96af33db38d84d7921dc7dbf4f642.exe	82
PID 4972 wrote to memory of 3648	4972	5ff2becf2c56500cb71898f661c863e647a96af33db38d84d7921dc7dbf4f642.exe	84
PID 4972 wrote to memory of 3648	4972	5ff2becf2c56500cb71898f661c863e647a96af33db38d84d7921dc7dbf4f642.exe	84
PID 3648 wrote to memory of 4144	3648	Windows Defender SmartScreen (32 bit).exe	85
PID 3648 wrote to memory of 4144	3648	Windows Defender SmartScreen (32 bit).exe	85

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\5ff2becf2c56500cb71898f661c863e647a96af33db38d84d7921dc7dbf4f642.exe
"C:\Users\Admin\AppData\Local\Temp\5ff2becf2c56500cb71898f661c863e647a96af33db38d84d7921dc7dbf4f642.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4972
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "Server Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\WindowsLockerZAP\Windows Defender SmartScreen (32 bit).exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:3548
- C:\Users\Admin\AppData\Roaming\WindowsLockerZAP\Windows Defender SmartScreen (32 bit).exe
  "C:\Users\Admin\AppData\Roaming\WindowsLockerZAP\Windows Defender SmartScreen (32 bit).exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:3648
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "Server Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\WindowsLockerZAP\Windows Defender SmartScreen (32 bit).exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:4144

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\WindowsLockerZAP\Windows Defender SmartScreen (32 bit).exe

Filesize
3.1MB

MD5
ff8c68c60f122eb7f8473106d4bcf26c

SHA1
0efa03e7412e7e15868c93604372d2b2e6b80662

SHA256
5ff2becf2c56500cb71898f661c863e647a96af33db38d84d7921dc7dbf4f642

SHA512
ab92ef844a015c3fcbfba313872b922bff54184b25623ed34f4829bd66a95af081cdeefd35425a4d3b9d9085ccf8c25045cf6093d74a5c8c35012c1b7546688e

Download Submit
memory/3648-9-0x00007FFCC6060000-0x00007FFCC6B21000-memory.dmp

Filesize
10.8MB

Download
memory/3648-11-0x00007FFCC6060000-0x00007FFCC6B21000-memory.dmp

Filesize
10.8MB

Download
memory/3648-12-0x000000001B120000-0x000000001B170000-memory.dmp

Filesize
320KB

Download
memory/3648-13-0x000000001D3F0000-0x000000001D4A2000-memory.dmp

Filesize
712KB

Download
memory/3648-14-0x00007FFCC6060000-0x00007FFCC6B21000-memory.dmp

Filesize
10.8MB

Download
memory/4972-0-0x00007FFCC6063000-0x00007FFCC6065000-memory.dmp

Filesize
8KB

Download
memory/4972-1-0x0000000000AD0000-0x0000000000DF4000-memory.dmp

Filesize
3.1MB

Download
memory/4972-2-0x00007FFCC6060000-0x00007FFCC6B21000-memory.dmp

Filesize
10.8MB

Download
memory/4972-10-0x00007FFCC6060000-0x00007FFCC6B21000-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