quasar | d28acb4d213710a1244890036bdf80713c4a33584e8036d379802c1881e90f24 | Triage

Analysis

max time kernel
1033s
max time network
1043s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
18/01/2025, 08:05 UTC

Sharing

Report Analysis Logs

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

C2

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 3 IoCs

resource	yara_rule
behavioral1/memory/796-1-0x0000000001080000-0x00000000013A4000-memory.dmp	family_quasar
behavioral1/files/0x0008000000016210-6.dat	family_quasar
behavioral1/memory/1572-10-0x0000000000E70000-0x0000000001194000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
1572	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

pid	Process
2296	schtasks.exe
2408	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	796	Client-built.exe
Token: SeDebugPrivilege	1572	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1572	Client.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 796 wrote to memory of 2296	796	Client-built.exe	28
PID 796 wrote to memory of 2296	796	Client-built.exe	28
PID 796 wrote to memory of 2296	796	Client-built.exe	28
PID 796 wrote to memory of 1572	796	Client-built.exe	30
PID 796 wrote to memory of 1572	796	Client-built.exe	30
PID 796 wrote to memory of 1572	796	Client-built.exe	30
PID 1572 wrote to memory of 2408	1572	Client.exe	31
PID 1572 wrote to memory of 2408	1572	Client.exe	31
PID 1572 wrote to memory of 2408	1572	Client.exe	31

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:796
- 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:2296
- 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:1572
- - 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:2408

Network

No results found

192.168.0.26:4782

Client.exe

152 B
3
192.168.0.26:4782

Client.exe

152 B
3
192.168.0.26:4782

Client.exe

152 B
3
192.168.0.26:4782

Client.exe

152 B
3
192.168.0.26:4782

Client.exe

152 B
3
192.168.0.26:4782

Client.exe

152 B
3
192.168.0.26:4782

Client.exe

152 B
3
192.168.0.26:4782

Client.exe

152 B
3
192.168.0.26:4782

Client.exe

152 B
3
192.168.0.26:4782

Client.exe

152 B
3
192.168.0.26:4782

Client.exe

152 B
3
192.168.0.26:4782

Client.exe

152 B
3
192.168.0.26:4782

Client.exe

152 B
3
192.168.0.26:4782

Client.exe

152 B
3
192.168.0.26:4782

Client.exe

152 B
3
192.168.0.26:4782

Client.exe

152 B
3
192.168.0.26:4782

Client.exe

152 B
3
192.168.0.26:4782

Client.exe

152 B
3
192.168.0.26:4782

Client.exe

152 B
3
192.168.0.26:4782

Client.exe

152 B
3
192.168.0.26:4782

Client.exe

152 B
3
192.168.0.26:4782

Client.exe

152 B
3
192.168.0.26:4782

Client.exe

152 B
3
192.168.0.26:4782

Client.exe

152 B
3
192.168.0.26:4782

Client.exe

152 B
3
192.168.0.26:4782

Client.exe

152 B
3
192.168.0.26:4782

Client.exe

152 B
3
192.168.0.26:4782

Client.exe

152 B
3
192.168.0.26:4782

Client.exe

152 B
3
192.168.0.26:4782

Client.exe

152 B
3
192.168.0.26:4782

Client.exe

152 B
3
192.168.0.26:4782

Client.exe

152 B
3
192.168.0.26:4782

Client.exe

152 B
3
192.168.0.26:4782

Client.exe

152 B
3
192.168.0.26:4782

Client.exe

152 B
3
192.168.0.26:4782

Client.exe

152 B
3
192.168.0.26:4782

Client.exe

152 B
3
192.168.0.26:4782

Client.exe

152 B
3
192.168.0.26:4782

Client.exe

152 B
3
192.168.0.26:4782

Client.exe

152 B
3
192.168.0.26:4782

Client.exe

152 B
3
192.168.0.26:4782

Client.exe

152 B
3
192.168.0.26:4782

Client.exe

152 B
3

No results found

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

Scheduled Task

Persistence

Scheduled Task/Job

Scheduled Task

Privilege Escalation

Scheduled Task/Job

Scheduled Task

Defense Evasion

Credential Access

Discovery

Query Registry

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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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/796-0-0x000007FEF5423000-0x000007FEF5424000-memory.dmp

Filesize
4KB

Download
memory/796-1-0x0000000001080000-0x00000000013A4000-memory.dmp

Filesize
3.1MB

Download
memory/796-2-0x000007FEF5420000-0x000007FEF5E0C000-memory.dmp

Filesize
9.9MB

Download
memory/796-8-0x000007FEF5420000-0x000007FEF5E0C000-memory.dmp

Filesize
9.9MB

Download
memory/1572-9-0x000007FEF5420000-0x000007FEF5E0C000-memory.dmp

Filesize
9.9MB

Download
memory/1572-10-0x0000000000E70000-0x0000000001194000-memory.dmp

Filesize
3.1MB

Download
memory/1572-11-0x000007FEF5420000-0x000007FEF5E0C000-memory.dmp

Filesize
9.9MB

Download
memory/1572-12-0x000007FEF5420000-0x000007FEF5E0C000-memory.dmp

Filesize
9.9MB

Download