quasar | 1802c12195920564b376da69515b15bd80800b4f5e4c78fd7eb7ddc16eb4c16f

Analysis

max time kernel
126s
max time network
142s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
09-12-2024 04:13

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General

Target

qua1copy.exe
Size

3.1MB
MD5

93c01f8db5d2ed29f0517e5127cc8e20
SHA1

6dd1ec4bb3a44d49069c520147d3a2f770712f9d
SHA256

1802c12195920564b376da69515b15bd80800b4f5e4c78fd7eb7ddc16eb4c16f
SHA512

e88f5a48f13d6b398442cf4ed2486f2eafa9305869df1b9b8b8321207227fe1dbbc60f81f05f36e68a08f205f7a0a1db1b5196b309a57418e99b2e3ea0245858
SSDEEP

24576:ay0l0qdGhU/yVzs01yI0ovMdtm0CFnlzTrKP:a3yayVt0okdt

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 family
quasar

Quasar payload 2 IoCs

resource	yara_rule
behavioral2/memory/2372-1-0x0000000000D50000-0x0000000001074000-memory.dmp	family_quasar
behavioral2/files/0x000a000000023b7b-6.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
4688	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
2748	schtasks.exe
3236	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2372	qua1copy.exe
Token: SeDebugPrivilege	4688	svchost.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4688	svchost.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2372 wrote to memory of 2748	2372	qua1copy.exe	85
PID 2372 wrote to memory of 2748	2372	qua1copy.exe	85
PID 2372 wrote to memory of 4688	2372	qua1copy.exe	87
PID 2372 wrote to memory of 4688	2372	qua1copy.exe	87
PID 4688 wrote to memory of 3236	4688	svchost.exe	88
PID 4688 wrote to memory of 3236	4688	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\qua1copy.exe
"C:\Users\Admin\AppData\Local\Temp\qua1copy.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2372
- 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:2748
- 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:4688
- - 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:3236

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
93c01f8db5d2ed29f0517e5127cc8e20

SHA1
6dd1ec4bb3a44d49069c520147d3a2f770712f9d

SHA256
1802c12195920564b376da69515b15bd80800b4f5e4c78fd7eb7ddc16eb4c16f

SHA512
e88f5a48f13d6b398442cf4ed2486f2eafa9305869df1b9b8b8321207227fe1dbbc60f81f05f36e68a08f205f7a0a1db1b5196b309a57418e99b2e3ea0245858

Download Submit
memory/2372-0-0x00007FFB67ED3000-0x00007FFB67ED5000-memory.dmp

Filesize
8KB

Download
memory/2372-1-0x0000000000D50000-0x0000000001074000-memory.dmp

Filesize
3.1MB

Download
memory/2372-2-0x00007FFB67ED0000-0x00007FFB68991000-memory.dmp

Filesize
10.8MB

Download
memory/2372-9-0x00007FFB67ED0000-0x00007FFB68991000-memory.dmp

Filesize
10.8MB

Download
memory/4688-10-0x00007FFB67ED0000-0x00007FFB68991000-memory.dmp

Filesize
10.8MB

Download
memory/4688-11-0x000000001D650000-0x000000001D6A0000-memory.dmp

Filesize
320KB

Download
memory/4688-12-0x000000001D760000-0x000000001D812000-memory.dmp

Filesize
712KB

Download
memory/4688-13-0x00007FFB67ED0000-0x00007FFB68991000-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