quasar | 5c383cff50ac7c9f8ec2ac05464302885def4d389f6592340c23ade7eb5f5000

General

Target

5c383cff50ac7c9f8ec2ac05464302885def4d389f6592340c23ade7eb5f5000N.exe
Size

502KB
MD5

7f6ef73a37700d318d19912b27d0c760
SHA1

f8a3cb6f1359076955fa9a0729d09b8eb7fc60fd
SHA256

5c383cff50ac7c9f8ec2ac05464302885def4d389f6592340c23ade7eb5f5000
SHA512

8516266e89bbadf08841e9b17c673c5cbfdf76e754922f0db704261da08dae231f2902bff1f86c64ddb618290f8f00a731d0dce2de4b7522e78d584929848e51
SSDEEP

6144:cTEgdc0YzXAGbgiIN2RSBwbPdTEDIKBDkQfocE9Ob8F9PQ5BZcTR3+:cTEgdfYjbgnhDktpWTZcd+

Score

10^/10

quasar office spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.0

Botnet

office

C2

192.168.147.1:4782

Mutex

fefeb1a4-7034-4293-a517-f90e7365e8e2

Attributes

encryption_key
4111EB4E3452F3046C6F5DFE90F84F08D3E1BB9C
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Quasar Client Startup
subdirectory
036234237

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/1864-1-0x0000000000FA0000-0x0000000001024000-memory.dmp	family_quasar
behavioral1/files/0x0007000000019219-4.dat	family_quasar
behavioral1/memory/2944-7-0x00000000003A0000-0x0000000000424000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
2944	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
2056	schtasks.exe
3048	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1864	5c383cff50ac7c9f8ec2ac05464302885def4d389f6592340c23ade7eb5f5000N.exe
Token: SeDebugPrivilege	2944	Client.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
2944	Client.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
2944	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2944	Client.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 1864 wrote to memory of 2056	1864	5c383cff50ac7c9f8ec2ac05464302885def4d389f6592340c23ade7eb5f5000N.exe	30
PID 1864 wrote to memory of 2056	1864	5c383cff50ac7c9f8ec2ac05464302885def4d389f6592340c23ade7eb5f5000N.exe	30
PID 1864 wrote to memory of 2056	1864	5c383cff50ac7c9f8ec2ac05464302885def4d389f6592340c23ade7eb5f5000N.exe	30
PID 1864 wrote to memory of 2944	1864	5c383cff50ac7c9f8ec2ac05464302885def4d389f6592340c23ade7eb5f5000N.exe	32
PID 1864 wrote to memory of 2944	1864	5c383cff50ac7c9f8ec2ac05464302885def4d389f6592340c23ade7eb5f5000N.exe	32
PID 1864 wrote to memory of 2944	1864	5c383cff50ac7c9f8ec2ac05464302885def4d389f6592340c23ade7eb5f5000N.exe	32
PID 2944 wrote to memory of 3048	2944	Client.exe	33
PID 2944 wrote to memory of 3048	2944	Client.exe	33
PID 2944 wrote to memory of 3048	2944	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\5c383cff50ac7c9f8ec2ac05464302885def4d389f6592340c23ade7eb5f5000N.exe
"C:\Users\Admin\AppData\Local\Temp\5c383cff50ac7c9f8ec2ac05464302885def4d389f6592340c23ade7eb5f5000N.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1864
- C:\Windows\system32\schtasks.exe
  "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\5c383cff50ac7c9f8ec2ac05464302885def4d389f6592340c23ade7eb5f5000N.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2056
- C:\Users\Admin\AppData\Roaming\036234237\Client.exe
  "C:\Users\Admin\AppData\Roaming\036234237\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:2944
- - C:\Windows\system32\schtasks.exe
    "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\036234237\Client.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:3048

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\036234237\Client.exe

Filesize
502KB

MD5
7f6ef73a37700d318d19912b27d0c760

SHA1
f8a3cb6f1359076955fa9a0729d09b8eb7fc60fd

SHA256
5c383cff50ac7c9f8ec2ac05464302885def4d389f6592340c23ade7eb5f5000

SHA512
8516266e89bbadf08841e9b17c673c5cbfdf76e754922f0db704261da08dae231f2902bff1f86c64ddb618290f8f00a731d0dce2de4b7522e78d584929848e51

Download Submit
memory/1864-0-0x000007FEF5A23000-0x000007FEF5A24000-memory.dmp

Filesize
4KB

Download
memory/1864-1-0x0000000000FA0000-0x0000000001024000-memory.dmp

Filesize
528KB

Download
memory/1864-2-0x000007FEF5A20000-0x000007FEF640C000-memory.dmp

Filesize
9.9MB

Download
memory/1864-9-0x000007FEF5A20000-0x000007FEF640C000-memory.dmp

Filesize
9.9MB

Download
memory/2944-7-0x00000000003A0000-0x0000000000424000-memory.dmp

Filesize
528KB

Download
memory/2944-8-0x000007FEF5A20000-0x000007FEF640C000-memory.dmp

Filesize
9.9MB

Download
memory/2944-10-0x000007FEF5A20000-0x000007FEF640C000-memory.dmp

Filesize
9.9MB

Download
memory/2944-11-0x000007FEF5A20000-0x000007FEF640C000-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