quasar | 89fa63d15ed2d1efecb7cea57600721b74f90e2f83e213f556759e788133a75d

General

Target

89fa63d15ed2d1efecb7cea57600721b74f90e2f83e213f556759e788133a75d.exe
Size

3.1MB
MD5

6d6b0853a2aac3f0fe8403826e778cfd
SHA1

2a7d910997330b2e00555252603b725af6a9a8bb
SHA256

89fa63d15ed2d1efecb7cea57600721b74f90e2f83e213f556759e788133a75d
SHA512

2d1b1af0c174c85f0c0be5f946a71826c8d18489d7b6c8a8f8d09a9709f1669c232e270fbce945d04740c5cfabf46e17e17a291d263c537a04dda8932e40ec28
SSDEEP

49152:Hv+I22SsaNYfdPBldt698dBcjHFFRJ6PbR3LoGd4hyTHHB72eh2NT:Hvz22SsaNYfdPBldt6+dBcjHFFRJ6hG

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

192.168.181.84:4782

Mutex

1ed20179-691a-4881-806d-c5d12340d8e9

Attributes

encryption_key
DF9BFB10D9C47294CB84A29DC07B28AE843D8C6F
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/4904-1-0x00000000007F0000-0x0000000000B14000-memory.dmp	family_quasar
behavioral2/files/0x000b000000023b71-6.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
1012	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
2976	schtasks.exe
2712	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4904	89fa63d15ed2d1efecb7cea57600721b74f90e2f83e213f556759e788133a75d.exe
Token: SeDebugPrivilege	1012	Client.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
1012	Client.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
1012	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1012	Client.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4904 wrote to memory of 2976	4904	89fa63d15ed2d1efecb7cea57600721b74f90e2f83e213f556759e788133a75d.exe	83
PID 4904 wrote to memory of 2976	4904	89fa63d15ed2d1efecb7cea57600721b74f90e2f83e213f556759e788133a75d.exe	83
PID 4904 wrote to memory of 1012	4904	89fa63d15ed2d1efecb7cea57600721b74f90e2f83e213f556759e788133a75d.exe	85
PID 4904 wrote to memory of 1012	4904	89fa63d15ed2d1efecb7cea57600721b74f90e2f83e213f556759e788133a75d.exe	85
PID 1012 wrote to memory of 2712	1012	Client.exe	86
PID 1012 wrote to memory of 2712	1012	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\89fa63d15ed2d1efecb7cea57600721b74f90e2f83e213f556759e788133a75d.exe
"C:\Users\Admin\AppData\Local\Temp\89fa63d15ed2d1efecb7cea57600721b74f90e2f83e213f556759e788133a75d.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4904
- 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:2976
- 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:1012
- - 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:2712

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
6d6b0853a2aac3f0fe8403826e778cfd

SHA1
2a7d910997330b2e00555252603b725af6a9a8bb

SHA256
89fa63d15ed2d1efecb7cea57600721b74f90e2f83e213f556759e788133a75d

SHA512
2d1b1af0c174c85f0c0be5f946a71826c8d18489d7b6c8a8f8d09a9709f1669c232e270fbce945d04740c5cfabf46e17e17a291d263c537a04dda8932e40ec28

Download Submit
memory/1012-10-0x00007FFC61BE0000-0x00007FFC626A1000-memory.dmp

Filesize
10.8MB

Download
memory/1012-11-0x00007FFC61BE0000-0x00007FFC626A1000-memory.dmp

Filesize
10.8MB

Download
memory/1012-12-0x000000001BF00000-0x000000001BF50000-memory.dmp

Filesize
320KB

Download
memory/1012-13-0x000000001C010000-0x000000001C0C2000-memory.dmp

Filesize
712KB

Download
memory/1012-14-0x00007FFC61BE0000-0x00007FFC626A1000-memory.dmp

Filesize
10.8MB

Download
memory/4904-0-0x00007FFC61BE3000-0x00007FFC61BE5000-memory.dmp

Filesize
8KB

Download
memory/4904-1-0x00000000007F0000-0x0000000000B14000-memory.dmp

Filesize
3.1MB

Download
memory/4904-2-0x00007FFC61BE0000-0x00007FFC626A1000-memory.dmp

Filesize
10.8MB

Download
memory/4904-9-0x00007FFC61BE0000-0x00007FFC626A1000-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