quasar | df1efbc7ad460171eccb432f6a1bea7fdfe239c0625a2a1fc2ba4e46121fd453

General

Target

df1efbc7ad460171eccb432f6a1bea7fdfe239c0625a2a1fc2ba4e46121fd453.exe
Size

3.1MB
MD5

5069fe748eedf0e4041c185146320f3a
SHA1

2f99d5e6279049e4fea6df914c017843abf920cd
SHA256

df1efbc7ad460171eccb432f6a1bea7fdfe239c0625a2a1fc2ba4e46121fd453
SHA512

25b57d73ecccd7980ab75bbe740ea73238b268c9149692a2a57ceb64fba47999334bd6863fd272c11665f103aa3f5db6db79fbabb184ff6e17cadf2318b6775b
SSDEEP

49152:CvyI22SsaNYfdPBldt698dBcjHYxOZESD9k/rGoGdxTHHB72eh2NT:Cvf22SsaNYfdPBldt6+dBcjHYxOp

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

192.168.0.101:8080

Mutex

02b9d5d5-a658-4c3f-beb3-e1e9cbb4ed8e

Attributes

encryption_key
188193B0C2081128F4D28BCFDBDC78F4E505ED6B
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Quasar Client Startup
subdirectory
PC

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/2700-1-0x0000000000040000-0x0000000000364000-memory.dmp	family_quasar
behavioral1/files/0x0008000000015dc3-6.dat	family_quasar
behavioral1/memory/3008-10-0x0000000000CD0000-0x0000000000FF4000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
3008	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
2928	schtasks.exe
2872	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2700	df1efbc7ad460171eccb432f6a1bea7fdfe239c0625a2a1fc2ba4e46121fd453.exe
Token: SeDebugPrivilege	3008	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3008	Client.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2700 wrote to memory of 2872	2700	df1efbc7ad460171eccb432f6a1bea7fdfe239c0625a2a1fc2ba4e46121fd453.exe	30
PID 2700 wrote to memory of 2872	2700	df1efbc7ad460171eccb432f6a1bea7fdfe239c0625a2a1fc2ba4e46121fd453.exe	30
PID 2700 wrote to memory of 2872	2700	df1efbc7ad460171eccb432f6a1bea7fdfe239c0625a2a1fc2ba4e46121fd453.exe	30
PID 2700 wrote to memory of 3008	2700	df1efbc7ad460171eccb432f6a1bea7fdfe239c0625a2a1fc2ba4e46121fd453.exe	32
PID 2700 wrote to memory of 3008	2700	df1efbc7ad460171eccb432f6a1bea7fdfe239c0625a2a1fc2ba4e46121fd453.exe	32
PID 2700 wrote to memory of 3008	2700	df1efbc7ad460171eccb432f6a1bea7fdfe239c0625a2a1fc2ba4e46121fd453.exe	32
PID 3008 wrote to memory of 2928	3008	Client.exe	33
PID 3008 wrote to memory of 2928	3008	Client.exe	33
PID 3008 wrote to memory of 2928	3008	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\df1efbc7ad460171eccb432f6a1bea7fdfe239c0625a2a1fc2ba4e46121fd453.exe
"C:\Users\Admin\AppData\Local\Temp\df1efbc7ad460171eccb432f6a1bea7fdfe239c0625a2a1fc2ba4e46121fd453.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2700
- C:\Windows\system32\schtasks.exe
  "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\PC\Client.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2872
- C:\Users\Admin\AppData\Roaming\PC\Client.exe
  "C:\Users\Admin\AppData\Roaming\PC\Client.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:3008
- - C:\Windows\system32\schtasks.exe
    "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\PC\Client.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2928

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\PC\Client.exe

Filesize
3.1MB

MD5
5069fe748eedf0e4041c185146320f3a

SHA1
2f99d5e6279049e4fea6df914c017843abf920cd

SHA256
df1efbc7ad460171eccb432f6a1bea7fdfe239c0625a2a1fc2ba4e46121fd453

SHA512
25b57d73ecccd7980ab75bbe740ea73238b268c9149692a2a57ceb64fba47999334bd6863fd272c11665f103aa3f5db6db79fbabb184ff6e17cadf2318b6775b

Download Submit
memory/2700-0-0x000007FEF5883000-0x000007FEF5884000-memory.dmp

Filesize
4KB

Download
memory/2700-1-0x0000000000040000-0x0000000000364000-memory.dmp

Filesize
3.1MB

Download
memory/2700-2-0x000007FEF5880000-0x000007FEF626C000-memory.dmp

Filesize
9.9MB

Download
memory/2700-9-0x000007FEF5880000-0x000007FEF626C000-memory.dmp

Filesize
9.9MB

Download
memory/3008-8-0x000007FEF5880000-0x000007FEF626C000-memory.dmp

Filesize
9.9MB

Download
memory/3008-10-0x0000000000CD0000-0x0000000000FF4000-memory.dmp

Filesize
3.1MB

Download
memory/3008-11-0x000007FEF5880000-0x000007FEF626C000-memory.dmp

Filesize
9.9MB

Download
memory/3008-12-0x000007FEF5880000-0x000007FEF626C000-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