quasar | d28acb4d213710a1244890036bdf80713c4a33584e8036d379802c1881e90f24

Analysis

max time kernel
32s
max time network
36s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
18-01-2025 08:05

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General

Target

Client-built.exe
Size

3.1MB
MD5

e95dbcf6b36ef995310b6eaf26ebe3f7
SHA1

34fab34a2311b2c67ca62e17f368a9e45390e32a
SHA256

d28acb4d213710a1244890036bdf80713c4a33584e8036d379802c1881e90f24
SHA512

87064ecafbd5c2bf2d3c2d5944568b6c8860d62081210fc8f1000269b4d280958e96ece246379c7de43c83c28aabd59463777a7056d93f6de026d8d2c61c85e4
SSDEEP

49152:bvyI22SsaNYfdPBldt698dBcjHlVSl1J/CoGdPTHHB72eh2NT:bvf22SsaNYfdPBldt6+dBcjHlVS0

Score

10^/10

quasar myscasmmer spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Myscasmmer

192.168.0.26:4782

Mutex

eb08c9a6-9a1e-4b9d-a7ab-8e6e44c6fc66

Attributes

encryption_key
2E42F13569D1CAF4CA99640EB8D8A7A5AA13B260
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/884-1-0x0000000000550000-0x0000000000874000-memory.dmp	family_quasar
behavioral2/files/0x000a000000023b9e-6.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
3280	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
2348	schtasks.exe
3984	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	884	Client-built.exe
Token: SeDebugPrivilege	3280	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3280	Client.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 884 wrote to memory of 2348	884	Client-built.exe	82
PID 884 wrote to memory of 2348	884	Client-built.exe	82
PID 884 wrote to memory of 3280	884	Client-built.exe	84
PID 884 wrote to memory of 3280	884	Client-built.exe	84
PID 3280 wrote to memory of 3984	3280	Client.exe	85
PID 3280 wrote to memory of 3984	3280	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:884
- 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:2348
- 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:3280
- - 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:3984

C:\Windows\System32\rundll32.exe
C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
1⤵
PID:4168

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
e95dbcf6b36ef995310b6eaf26ebe3f7

SHA1
34fab34a2311b2c67ca62e17f368a9e45390e32a

SHA256
d28acb4d213710a1244890036bdf80713c4a33584e8036d379802c1881e90f24

SHA512
87064ecafbd5c2bf2d3c2d5944568b6c8860d62081210fc8f1000269b4d280958e96ece246379c7de43c83c28aabd59463777a7056d93f6de026d8d2c61c85e4

Download Submit
memory/884-0-0x00007FFD9A553000-0x00007FFD9A555000-memory.dmp

Filesize
8KB

Download
memory/884-1-0x0000000000550000-0x0000000000874000-memory.dmp

Filesize
3.1MB

Download
memory/884-2-0x00007FFD9A550000-0x00007FFD9B011000-memory.dmp

Filesize
10.8MB

Download
memory/884-10-0x00007FFD9A550000-0x00007FFD9B011000-memory.dmp

Filesize
10.8MB

Download
memory/3280-9-0x00007FFD9A550000-0x00007FFD9B011000-memory.dmp

Filesize
10.8MB

Download
memory/3280-11-0x00007FFD9A550000-0x00007FFD9B011000-memory.dmp

Filesize
10.8MB

Download
memory/3280-12-0x000000001DC90000-0x000000001DCE0000-memory.dmp

Filesize
320KB

Download
memory/3280-13-0x000000001DDA0000-0x000000001DE52000-memory.dmp

Filesize
712KB

Download
memory/3280-14-0x00007FFD9A550000-0x00007FFD9B011000-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