quasar | 6d47dc0e0136fd3d0fa3d604727ef9302a55405a14edfbc2e6070ad547290237

General

Target

6d47dc0e0136fd3d0fa3d604727ef9302a55405a14edfbc2e6070ad547290237N.exe
Size

3.1MB
MD5

c9b1b0f1caf30d788f7d5e8e7bbf2630
SHA1

0701ea60ddd7fb7cc4b86722562313bf340632a9
SHA256

6d47dc0e0136fd3d0fa3d604727ef9302a55405a14edfbc2e6070ad547290237
SHA512

82bda10e77e1977b9afbb77c1c6ce4884c20e0e3cc28894a8990131773a6d58c3896f6ba0bc4386eea3fc05d486f83c20caa30b7a2ae503fd9b90df2c929d3ed
SSDEEP

49152:Svht62XlaSFNWPjljiFa2RoUYIQv7RBBxihoGdtJTHHB72eh2NT:SvL62XlaSFNWPjljiFXRoUYIIRK

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

192.168.1.125:4782

Mutex

18900002-3d71-4d3d-a3e4-f1b8ae453173

Attributes

encryption_key
F964335D77161C935F99410F722D66D3032FFF56
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
client
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/4844-1-0x0000000000F20000-0x0000000001244000-memory.dmp	family_quasar
behavioral2/files/0x0007000000023c86-6.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
2100	Client.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

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
4184	schtasks.exe
4060	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4844	6d47dc0e0136fd3d0fa3d604727ef9302a55405a14edfbc2e6070ad547290237N.exe
Token: SeDebugPrivilege	2100	Client.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
2100	Client.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
2100	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2100	Client.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4844 wrote to memory of 4184	4844	6d47dc0e0136fd3d0fa3d604727ef9302a55405a14edfbc2e6070ad547290237N.exe	83
PID 4844 wrote to memory of 4184	4844	6d47dc0e0136fd3d0fa3d604727ef9302a55405a14edfbc2e6070ad547290237N.exe	83
PID 4844 wrote to memory of 2100	4844	6d47dc0e0136fd3d0fa3d604727ef9302a55405a14edfbc2e6070ad547290237N.exe	85
PID 4844 wrote to memory of 2100	4844	6d47dc0e0136fd3d0fa3d604727ef9302a55405a14edfbc2e6070ad547290237N.exe	85
PID 2100 wrote to memory of 4060	2100	Client.exe	86
PID 2100 wrote to memory of 4060	2100	Client.exe	86

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\6d47dc0e0136fd3d0fa3d604727ef9302a55405a14edfbc2e6070ad547290237N.exe
"C:\Users\Admin\AppData\Local\Temp\6d47dc0e0136fd3d0fa3d604727ef9302a55405a14edfbc2e6070ad547290237N.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4844
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "client" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:4184
- 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 FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2100
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "client" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:4060

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

System Information Discovery

1

T1082

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
c9b1b0f1caf30d788f7d5e8e7bbf2630

SHA1
0701ea60ddd7fb7cc4b86722562313bf340632a9

SHA256
6d47dc0e0136fd3d0fa3d604727ef9302a55405a14edfbc2e6070ad547290237

SHA512
82bda10e77e1977b9afbb77c1c6ce4884c20e0e3cc28894a8990131773a6d58c3896f6ba0bc4386eea3fc05d486f83c20caa30b7a2ae503fd9b90df2c929d3ed

Download Submit
memory/2100-9-0x00007FFBAD560000-0x00007FFBAE021000-memory.dmp

Filesize
10.8MB

Download
memory/2100-11-0x00007FFBAD560000-0x00007FFBAE021000-memory.dmp

Filesize
10.8MB

Download
memory/2100-12-0x000000001C480000-0x000000001C4D0000-memory.dmp

Filesize
320KB

Download
memory/2100-13-0x000000001C590000-0x000000001C642000-memory.dmp

Filesize
712KB

Download
memory/2100-14-0x00007FFBAD560000-0x00007FFBAE021000-memory.dmp

Filesize
10.8MB

Download
memory/4844-0-0x00007FFBAD563000-0x00007FFBAD565000-memory.dmp

Filesize
8KB

Download
memory/4844-1-0x0000000000F20000-0x0000000001244000-memory.dmp

Filesize
3.1MB

Download
memory/4844-2-0x00007FFBAD560000-0x00007FFBAE021000-memory.dmp

Filesize
10.8MB

Download
memory/4844-10-0x00007FFBAD560000-0x00007FFBAE021000-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