quasar | ec1748bb524a5304d32d79ce0bde249c75d787812ad9a49bcd5d67a58c98859a

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
29-11-2024 00:44

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General

Target

Client-built.exe
Size

3.1MB
MD5

e60175e496024c929635816438b40fe2
SHA1

56a7bc169835945de5ac601426e720301141b144
SHA256

ec1748bb524a5304d32d79ce0bde249c75d787812ad9a49bcd5d67a58c98859a
SHA512

96bea0aec6b4822bbfe4bbc61d7d70dc27b18ccda3f85c7e8c9f8157235fc57812ccc305869d20df0ffe7bf34f1ba757c837752aad1ae0f5eddea95acc13c119
SSDEEP

49152:rvnI22SsaNYfdPBldt698dBcjH1ImebRjLoGdATHHB72eh2NT:rvI22SsaNYfdPBldt6+dBcjH1Ims

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

192.168.68.64:4782

Mutex

aac51872-c353-4334-af00-fe48eb068661

Attributes

encryption_key
6808A7D4497331E0215E1BD4F8BAFC9D1A6A08F0
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Quasar Client Startup
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/1788-1-0x0000000000F30000-0x0000000001254000-memory.dmp	family_quasar
behavioral2/files/0x0007000000023ca2-5.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
2860	Client.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
1956	schtasks.exe
516	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1788	Client-built.exe
Token: SeDebugPrivilege	2860	Client.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
2860	Client.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
2860	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2860	Client.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1788 wrote to memory of 516	1788	Client-built.exe	84
PID 1788 wrote to memory of 516	1788	Client-built.exe	84
PID 1788 wrote to memory of 2860	1788	Client-built.exe	86
PID 1788 wrote to memory of 2860	1788	Client-built.exe	86
PID 2860 wrote to memory of 1956	2860	Client.exe	87
PID 2860 wrote to memory of 1956	2860	Client.exe	87

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:1788
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:516
- 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 FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2860
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:1956

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\Client.exe

Filesize
3.1MB

MD5
e60175e496024c929635816438b40fe2

SHA1
56a7bc169835945de5ac601426e720301141b144

SHA256
ec1748bb524a5304d32d79ce0bde249c75d787812ad9a49bcd5d67a58c98859a

SHA512
96bea0aec6b4822bbfe4bbc61d7d70dc27b18ccda3f85c7e8c9f8157235fc57812ccc305869d20df0ffe7bf34f1ba757c837752aad1ae0f5eddea95acc13c119

Download Submit
memory/1788-0-0x00007FFAC20B3000-0x00007FFAC20B5000-memory.dmp

Filesize
8KB

Download
memory/1788-1-0x0000000000F30000-0x0000000001254000-memory.dmp

Filesize
3.1MB

Download
memory/1788-2-0x00007FFAC20B0000-0x00007FFAC2B71000-memory.dmp

Filesize
10.8MB

Download
memory/1788-10-0x00007FFAC20B0000-0x00007FFAC2B71000-memory.dmp

Filesize
10.8MB

Download
memory/2860-9-0x00007FFAC20B0000-0x00007FFAC2B71000-memory.dmp

Filesize
10.8MB

Download
memory/2860-11-0x00007FFAC20B0000-0x00007FFAC2B71000-memory.dmp

Filesize
10.8MB

Download
memory/2860-12-0x000000001C530000-0x000000001C580000-memory.dmp

Filesize
320KB

Download
memory/2860-13-0x000000001C640000-0x000000001C6F2000-memory.dmp

Filesize
712KB

Download
memory/2860-14-0x00007FFAC20B0000-0x00007FFAC2B71000-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