quasar | c1be767404a3d71717a54b01ebfa91ebff578dad8dd518a1a49012bcf012738e

Resubmissions

27/07/2024, 17:08

240727-vnrrpszapr 10

24/07/2024, 13:55

240724-q8e67aygrr 10

Analysis

max time kernel
142s
max time network
148s
platform
windows10-2004_x64
resource
win10v2004-20240704-en
resource tags

arch:x64arch:x86image:win10v2004-20240704-enlocale:en-usos:windows10-2004-x64system
submitted
24/07/2024, 13:55

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General

Target

6700ee6916de2b466bfba8efd9d0aaa71cf99252d3f95c570c366819a45ab2ce.exe
Size

3.1MB
MD5

e0bd71734fc197f5d445a0220c946718
SHA1

0bf01f37003f8474f7e038a5846a8f3d1231ab4f
SHA256

6700ee6916de2b466bfba8efd9d0aaa71cf99252d3f95c570c366819a45ab2ce
SHA512

f637d2e0a69f6d0228f67c62c1391e2be8c2e8bde13bcfd676f5eba9960464d9f87494fd4aa146b86bfb38c1870e16e8b48dcf0b937805b60e27df14905e1a4f
SSDEEP

49152:P3ye82ipaSmopPZlGPBbLbrJSrMayVgjokdtNTHHB72eh2NT:P3982ipaSmopPZlGPBnbrJSrMayVK

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

45.66.231.154:4782

Mutex

4304b988-116c-4522-ab83-7f9ad875f60f

Attributes

encryption_key
A6B8B9B9B02FC86103A59CE003D7B3B45DAF8550
install_name
svchost.exe
log_directory
svchost
reconnect_delay
3000
startup_key
svchost
subdirectory
svchost

Signatures

Quasar RAT
Quasar is an open source Remote Access Tool.
trojan spyware quasar

Quasar payload 2 IoCs

resource	yara_rule
behavioral30/memory/632-1-0x0000000000710000-0x0000000000A34000-memory.dmp	family_quasar
behavioral30/files/0x00080000000234ac-7.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
4496	svchost.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
1172	schtasks.exe
1800	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	632	6700ee6916de2b466bfba8efd9d0aaa71cf99252d3f95c570c366819a45ab2ce.exe
Token: SeDebugPrivilege	4496	svchost.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4496	svchost.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 632 wrote to memory of 1172	632	6700ee6916de2b466bfba8efd9d0aaa71cf99252d3f95c570c366819a45ab2ce.exe	85
PID 632 wrote to memory of 1172	632	6700ee6916de2b466bfba8efd9d0aaa71cf99252d3f95c570c366819a45ab2ce.exe	85
PID 632 wrote to memory of 4496	632	6700ee6916de2b466bfba8efd9d0aaa71cf99252d3f95c570c366819a45ab2ce.exe	87
PID 632 wrote to memory of 4496	632	6700ee6916de2b466bfba8efd9d0aaa71cf99252d3f95c570c366819a45ab2ce.exe	87
PID 4496 wrote to memory of 1800	4496	svchost.exe	88
PID 4496 wrote to memory of 1800	4496	svchost.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\6700ee6916de2b466bfba8efd9d0aaa71cf99252d3f95c570c366819a45ab2ce.exe
"C:\Users\Admin\AppData\Local\Temp\6700ee6916de2b466bfba8efd9d0aaa71cf99252d3f95c570c366819a45ab2ce.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:632
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "svchost" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\svchost\svchost.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:1172
- C:\Users\Admin\AppData\Roaming\svchost\svchost.exe
  "C:\Users\Admin\AppData\Roaming\svchost\svchost.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:4496
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "svchost" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\svchost\svchost.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:1800

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\svchost\svchost.exe

Filesize
3.1MB

MD5
e0bd71734fc197f5d445a0220c946718

SHA1
0bf01f37003f8474f7e038a5846a8f3d1231ab4f

SHA256
6700ee6916de2b466bfba8efd9d0aaa71cf99252d3f95c570c366819a45ab2ce

SHA512
f637d2e0a69f6d0228f67c62c1391e2be8c2e8bde13bcfd676f5eba9960464d9f87494fd4aa146b86bfb38c1870e16e8b48dcf0b937805b60e27df14905e1a4f

Download Submit
memory/632-0-0x00007FFAA64B3000-0x00007FFAA64B5000-memory.dmp

Filesize
8KB

Download
memory/632-1-0x0000000000710000-0x0000000000A34000-memory.dmp

Filesize
3.1MB

Download
memory/632-2-0x00007FFAA64B0000-0x00007FFAA6F71000-memory.dmp

Filesize
10.8MB

Download
memory/632-10-0x00007FFAA64B0000-0x00007FFAA6F71000-memory.dmp

Filesize
10.8MB

Download
memory/4496-9-0x00007FFAA64B0000-0x00007FFAA6F71000-memory.dmp

Filesize
10.8MB

Download
memory/4496-11-0x000000001CA00000-0x000000001CA50000-memory.dmp

Filesize
320KB

Download
memory/4496-12-0x000000001CB10000-0x000000001CBC2000-memory.dmp

Filesize
712KB

Download
memory/4496-13-0x00007FFAA64B0000-0x00007FFAA6F71000-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