quasar | 5fb2ada2fd81c7b0ed6e517e92900c6336323bc9f1b7fb19989e9a4e44ef0213

Analysis

max time kernel
134s
max time network
149s
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 17:35

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General

Target

Client-built.exe
Size

3.1MB
MD5

73a3341a9194801bc9024e6b8f963258
SHA1

7c10750556e5eba8e9872432561f76d010d519f3
SHA256

5fb2ada2fd81c7b0ed6e517e92900c6336323bc9f1b7fb19989e9a4e44ef0213
SHA512

629756335bcb53b1fde013c4c090f580b622bafe6d340bba0b9d1d53c3acc0719dbae025fb389ccad1bc298835a76077607f34a3ededa6e701d3dacabac375f7
SSDEEP

49152:Cv5G42pda6D+/PjlLOlg6yQipVil6bn1JqLoGdbTHHB72eh2NT:Cvo42pda6D+/PjlLOlZyQipVLbM

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

auto-london.gl.at.ply.gg:51655

facilities-desktop.gl.at.ply.gg:5987

Mutex

1ae47733-5e8b-44b5-b988-3cb4dd5ded05

Attributes

encryption_key
3C8DD6CA308BD63A3F09A62959EA7F529CD3E4F7
install_name
bob123.exe
log_directory
Logs
reconnect_delay
0
startup_key
SytemUpd
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/2060-1-0x0000000000720000-0x0000000000A44000-memory.dmp	family_quasar
behavioral2/files/0x0007000000023cba-7.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
4892	bob123.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

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
748	schtasks.exe
1304	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2060	Client-built.exe
Token: SeDebugPrivilege	4892	bob123.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
4892	bob123.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
4892	bob123.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4892	bob123.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2060 wrote to memory of 748	2060	Client-built.exe	82
PID 2060 wrote to memory of 748	2060	Client-built.exe	82
PID 2060 wrote to memory of 4892	2060	Client-built.exe	84
PID 2060 wrote to memory of 4892	2060	Client-built.exe	84
PID 4892 wrote to memory of 1304	4892	bob123.exe	85
PID 4892 wrote to memory of 1304	4892	bob123.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\Client-built.exe
"C:\Users\Admin\AppData\Local\Temp\Client-built.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2060
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "SytemUpd" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\bob123.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:748
- C:\Users\Admin\AppData\Roaming\SubDir\bob123.exe
  "C:\Users\Admin\AppData\Roaming\SubDir\bob123.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:4892
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "SytemUpd" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\bob123.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:1304

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

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\SubDir\bob123.exe

Filesize
3.1MB

MD5
73a3341a9194801bc9024e6b8f963258

SHA1
7c10750556e5eba8e9872432561f76d010d519f3

SHA256
5fb2ada2fd81c7b0ed6e517e92900c6336323bc9f1b7fb19989e9a4e44ef0213

SHA512
629756335bcb53b1fde013c4c090f580b622bafe6d340bba0b9d1d53c3acc0719dbae025fb389ccad1bc298835a76077607f34a3ededa6e701d3dacabac375f7

Download Submit
memory/2060-0-0x00007FFCA5843000-0x00007FFCA5845000-memory.dmp

Filesize
8KB

Download
memory/2060-1-0x0000000000720000-0x0000000000A44000-memory.dmp

Filesize
3.1MB

Download
memory/2060-2-0x00007FFCA5840000-0x00007FFCA6301000-memory.dmp

Filesize
10.8MB

Download
memory/2060-9-0x00007FFCA5840000-0x00007FFCA6301000-memory.dmp

Filesize
10.8MB

Download
memory/4892-10-0x00007FFCA5840000-0x00007FFCA6301000-memory.dmp

Filesize
10.8MB

Download
memory/4892-11-0x00007FFCA5840000-0x00007FFCA6301000-memory.dmp

Filesize
10.8MB

Download
memory/4892-12-0x000000001CB50000-0x000000001CBA0000-memory.dmp

Filesize
320KB

Download
memory/4892-13-0x000000001CC60000-0x000000001CD12000-memory.dmp

Filesize
712KB

Download
memory/4892-14-0x00007FFCA5840000-0x00007FFCA6301000-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