quasar | 5d492a1ee6301ae5b39955cb1c0cc2258de52313d7882f3ad95ac59661a7874d

General

Target

5d492a1ee6301ae5b39955cb1c0cc2258de52313d7882f3ad95ac59661a7874dN.exe
Size

3.1MB
MD5

f9e97e1d0baab5246233fca2eea990a0
SHA1

06b2a0eb80616eae7a9c259e8919ce7c0fb5c5a2
SHA256

5d492a1ee6301ae5b39955cb1c0cc2258de52313d7882f3ad95ac59661a7874d
SHA512

117eb156be6ba2c50871878c4460e636d56ac6b08b04cc164314cf16269a5f395234c37bf558ce6b2fac179fd1003d24de8373f1892ec69788370784de339192
SSDEEP

49152:rvgz92YpaQI6oPZlhP3ReybewogVRJ6ObR3LoGdITHHB72eh2NT:rv692YpaQI6oPZlhP3YybewogVRJ6I

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

2001:861:560e:ce30:6db0:3453:f804:711a:4782

89.85.26.128:4782

192.168.1.156:4782

Mutex

533fcd22-27a2-420e-9f21-2ff3d79ee14d

Attributes

encryption_key
52128CFEF3F48BE853BD8D76B4977E834A464AA8
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/2268-1-0x0000000001060000-0x0000000001384000-memory.dmp	family_quasar
behavioral1/files/0x002f000000018bd7-6.dat	family_quasar
behavioral1/memory/2172-10-0x0000000000290000-0x00000000005B4000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
2172	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
2892	schtasks.exe
2096	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2268	5d492a1ee6301ae5b39955cb1c0cc2258de52313d7882f3ad95ac59661a7874dN.exe
Token: SeDebugPrivilege	2172	Client.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
2172	Client.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
2172	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2172	Client.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2268 wrote to memory of 2892	2268	5d492a1ee6301ae5b39955cb1c0cc2258de52313d7882f3ad95ac59661a7874dN.exe	30
PID 2268 wrote to memory of 2892	2268	5d492a1ee6301ae5b39955cb1c0cc2258de52313d7882f3ad95ac59661a7874dN.exe	30
PID 2268 wrote to memory of 2892	2268	5d492a1ee6301ae5b39955cb1c0cc2258de52313d7882f3ad95ac59661a7874dN.exe	30
PID 2268 wrote to memory of 2172	2268	5d492a1ee6301ae5b39955cb1c0cc2258de52313d7882f3ad95ac59661a7874dN.exe	32
PID 2268 wrote to memory of 2172	2268	5d492a1ee6301ae5b39955cb1c0cc2258de52313d7882f3ad95ac59661a7874dN.exe	32
PID 2268 wrote to memory of 2172	2268	5d492a1ee6301ae5b39955cb1c0cc2258de52313d7882f3ad95ac59661a7874dN.exe	32
PID 2172 wrote to memory of 2096	2172	Client.exe	33
PID 2172 wrote to memory of 2096	2172	Client.exe	33
PID 2172 wrote to memory of 2096	2172	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\5d492a1ee6301ae5b39955cb1c0cc2258de52313d7882f3ad95ac59661a7874dN.exe
"C:\Users\Admin\AppData\Local\Temp\5d492a1ee6301ae5b39955cb1c0cc2258de52313d7882f3ad95ac59661a7874dN.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2268
- 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:2892
- 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:2172
- - 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:2096

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
f9e97e1d0baab5246233fca2eea990a0

SHA1
06b2a0eb80616eae7a9c259e8919ce7c0fb5c5a2

SHA256
5d492a1ee6301ae5b39955cb1c0cc2258de52313d7882f3ad95ac59661a7874d

SHA512
117eb156be6ba2c50871878c4460e636d56ac6b08b04cc164314cf16269a5f395234c37bf558ce6b2fac179fd1003d24de8373f1892ec69788370784de339192

Download Submit
memory/2172-10-0x0000000000290000-0x00000000005B4000-memory.dmp

Filesize
3.1MB

Download
memory/2172-9-0x000007FEF6400000-0x000007FEF6DEC000-memory.dmp

Filesize
9.9MB

Download
memory/2172-11-0x000007FEF6400000-0x000007FEF6DEC000-memory.dmp

Filesize
9.9MB

Download
memory/2172-12-0x000007FEF6400000-0x000007FEF6DEC000-memory.dmp

Filesize
9.9MB

Download
memory/2268-0-0x000007FEF6403000-0x000007FEF6404000-memory.dmp

Filesize
4KB

Download
memory/2268-1-0x0000000001060000-0x0000000001384000-memory.dmp

Filesize
3.1MB

Download
memory/2268-2-0x000007FEF6400000-0x000007FEF6DEC000-memory.dmp

Filesize
9.9MB

Download
memory/2268-8-0x000007FEF6400000-0x000007FEF6DEC000-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