quasar | c354777c96901afa12daa4d3d43fbeabb0d665bd20102065123a6580d98afd8c

Analysis

max time kernel
149s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
22-11-2024 21:08

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General

Target

Client-built.exe
Size

3.1MB
MD5

f4f5c081dbf509c18ce5b4a59518370d
SHA1

e6aa1129262d77374f11fcab0cbc47a8579403d7
SHA256

c354777c96901afa12daa4d3d43fbeabb0d665bd20102065123a6580d98afd8c
SHA512

5b258bed5f73639c37934aad5a03dbac0f304f3f8144bc45c0d69575121f34a92921f431a319bef833df688acf95d4244a122b4c923ed5680dbdeb986aea7641
SSDEEP

49152:nvjlL26AaNeWgPhlmVqvMQ7XSKcRxNESE0k/i9LoGdXTHHB72eh2NT:nvZL26AaNeWgPhlmVqkQ7XSKmxj1

Score

10^/10

quasar sad989 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

sad989

sad31464-44095.portmap.io:44095

Mutex

3aa0c41a-e1da-4ffc-a6d6-d0e1fb23e142

Attributes

encryption_key
1C07E43EE5680773AA8DD6580EAB18E3597DD8D7
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Notepad Security
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/2848-1-0x0000000000480000-0x00000000007A4000-memory.dmp	family_quasar
behavioral2/files/0x0031000000023b74-5.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
4324	Client.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
2788	schtasks.exe
1256	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2848	Client-built.exe
Token: SeDebugPrivilege	4324	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4324	Client.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2848 wrote to memory of 1256	2848	Client-built.exe	82
PID 2848 wrote to memory of 1256	2848	Client-built.exe	82
PID 2848 wrote to memory of 4324	2848	Client-built.exe	84
PID 2848 wrote to memory of 4324	2848	Client-built.exe	84
PID 4324 wrote to memory of 2788	4324	Client.exe	85
PID 4324 wrote to memory of 2788	4324	Client.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:2848
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "Notepad Security" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:1256
- 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 SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:4324
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "Notepad Security" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2788

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\SubDir\Client.exe

Filesize
3.1MB

MD5
f4f5c081dbf509c18ce5b4a59518370d

SHA1
e6aa1129262d77374f11fcab0cbc47a8579403d7

SHA256
c354777c96901afa12daa4d3d43fbeabb0d665bd20102065123a6580d98afd8c

SHA512
5b258bed5f73639c37934aad5a03dbac0f304f3f8144bc45c0d69575121f34a92921f431a319bef833df688acf95d4244a122b4c923ed5680dbdeb986aea7641

Download Submit
memory/2848-0-0x00007FFB93F43000-0x00007FFB93F45000-memory.dmp

Filesize
8KB

Download
memory/2848-1-0x0000000000480000-0x00000000007A4000-memory.dmp

Filesize
3.1MB

Download
memory/2848-2-0x00007FFB93F40000-0x00007FFB94A01000-memory.dmp

Filesize
10.8MB

Download
memory/2848-12-0x00007FFB93F40000-0x00007FFB94A01000-memory.dmp

Filesize
10.8MB

Download
memory/4324-8-0x00007FFB93F40000-0x00007FFB94A01000-memory.dmp

Filesize
10.8MB

Download
memory/4324-9-0x00007FFB93F40000-0x00007FFB94A01000-memory.dmp

Filesize
10.8MB

Download
memory/4324-10-0x000000001B5D0000-0x000000001B620000-memory.dmp

Filesize
320KB

Download
memory/4324-11-0x000000001D5F0000-0x000000001D6A2000-memory.dmp

Filesize
712KB

Download
memory/4324-13-0x00007FFB93F40000-0x00007FFB94A01000-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