quasar | c354777c96901afa12daa4d3d43fbeabb0d665bd20102065123a6580d98afd8c

Analysis

max time kernel
149s
max time network
135s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-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 3 IoCs

resource	yara_rule
behavioral1/memory/864-1-0x0000000000A30000-0x0000000000D54000-memory.dmp	family_quasar
behavioral1/files/0x0008000000015cf1-5.dat	family_quasar
behavioral1/memory/2504-9-0x0000000000E50000-0x0000000001174000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
2504	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
2384	schtasks.exe
1332	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	864	Client-built.exe
Token: SeDebugPrivilege	2504	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2504	Client.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 864 wrote to memory of 2384	864	Client-built.exe	30
PID 864 wrote to memory of 2384	864	Client-built.exe	30
PID 864 wrote to memory of 2384	864	Client-built.exe	30
PID 864 wrote to memory of 2504	864	Client-built.exe	32
PID 864 wrote to memory of 2504	864	Client-built.exe	32
PID 864 wrote to memory of 2504	864	Client-built.exe	32
PID 2504 wrote to memory of 1332	2504	Client.exe	33
PID 2504 wrote to memory of 1332	2504	Client.exe	33
PID 2504 wrote to memory of 1332	2504	Client.exe	33

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:864
- 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:2384
- 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:2504
- - 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:1332

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/864-0-0x000007FEF5DE3000-0x000007FEF5DE4000-memory.dmp

Filesize
4KB

Download
memory/864-1-0x0000000000A30000-0x0000000000D54000-memory.dmp

Filesize
3.1MB

Download
memory/864-2-0x000007FEF5DE0000-0x000007FEF67CC000-memory.dmp

Filesize
9.9MB

Download
memory/864-7-0x000007FEF5DE0000-0x000007FEF67CC000-memory.dmp

Filesize
9.9MB

Download
memory/2504-8-0x000007FEF5DE0000-0x000007FEF67CC000-memory.dmp

Filesize
9.9MB

Download
memory/2504-9-0x0000000000E50000-0x0000000001174000-memory.dmp

Filesize
3.1MB

Download
memory/2504-10-0x000007FEF5DE0000-0x000007FEF67CC000-memory.dmp

Filesize
9.9MB

Download
memory/2504-11-0x000007FEF5DE0000-0x000007FEF67CC000-memory.dmp

Filesize
9.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads