quasar | dd4680359347745aa7ce45caf96c90d366e178f1602abbedd0129d1ac37288f9

General

Target

dd4680359347745aa7ce45caf96c90d366e178f1602abbedd0129d1ac37288f9.exe
Size

3.1MB
MD5

4ac535d06e17b269b25eedb97d88411a
SHA1

0e4aeb453e54fb9bacbbe802852db63f8d6d19b6
SHA256

dd4680359347745aa7ce45caf96c90d366e178f1602abbedd0129d1ac37288f9
SHA512

586ba0c8aec409466c3169ce71c93e4d180bc41976f70939e89b575cf9baf4b8900bab1028d9b29fff173b2bcfb1b4df34d411be6fa557bf63f018f18c9b1908
SSDEEP

49152:6vht62XlaSFNWPjljiFa2RoUYI1PxNESEjk/i3LoGdigTHHB72eh2NT:6vL62XlaSFNWPjljiFXRoUYIFxyb

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

interestingsigma.hopto.org:20

Mutex

11bbf22e-826e-486b-b024-adbd86228a9e

Attributes

encryption_key
7A589EDBC6A581E125BF830EF0D05FC74BB75E30
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
ctfmon
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/4000-1-0x0000000000DE0000-0x0000000001104000-memory.dmp	family_quasar
behavioral2/files/0x0008000000023cb1-6.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
4804	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
2192	schtasks.exe
808	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4000	dd4680359347745aa7ce45caf96c90d366e178f1602abbedd0129d1ac37288f9.exe
Token: SeDebugPrivilege	4804	Client.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
4804	Client.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
4804	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4804	Client.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4000 wrote to memory of 2192	4000	dd4680359347745aa7ce45caf96c90d366e178f1602abbedd0129d1ac37288f9.exe	83
PID 4000 wrote to memory of 2192	4000	dd4680359347745aa7ce45caf96c90d366e178f1602abbedd0129d1ac37288f9.exe	83
PID 4000 wrote to memory of 4804	4000	dd4680359347745aa7ce45caf96c90d366e178f1602abbedd0129d1ac37288f9.exe	85
PID 4000 wrote to memory of 4804	4000	dd4680359347745aa7ce45caf96c90d366e178f1602abbedd0129d1ac37288f9.exe	85
PID 4804 wrote to memory of 808	4804	Client.exe	86
PID 4804 wrote to memory of 808	4804	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\dd4680359347745aa7ce45caf96c90d366e178f1602abbedd0129d1ac37288f9.exe
"C:\Users\Admin\AppData\Local\Temp\dd4680359347745aa7ce45caf96c90d366e178f1602abbedd0129d1ac37288f9.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4000
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "ctfmon" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2192
- 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:4804
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "ctfmon" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:808

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
4ac535d06e17b269b25eedb97d88411a

SHA1
0e4aeb453e54fb9bacbbe802852db63f8d6d19b6

SHA256
dd4680359347745aa7ce45caf96c90d366e178f1602abbedd0129d1ac37288f9

SHA512
586ba0c8aec409466c3169ce71c93e4d180bc41976f70939e89b575cf9baf4b8900bab1028d9b29fff173b2bcfb1b4df34d411be6fa557bf63f018f18c9b1908

Download Submit
memory/4000-0-0x00007FFFA5FC3000-0x00007FFFA5FC5000-memory.dmp

Filesize
8KB

Download
memory/4000-1-0x0000000000DE0000-0x0000000001104000-memory.dmp

Filesize
3.1MB

Download
memory/4000-2-0x00007FFFA5FC0000-0x00007FFFA6A81000-memory.dmp

Filesize
10.8MB

Download
memory/4000-10-0x00007FFFA5FC0000-0x00007FFFA6A81000-memory.dmp

Filesize
10.8MB

Download
memory/4804-9-0x00007FFFA5FC0000-0x00007FFFA6A81000-memory.dmp

Filesize
10.8MB

Download
memory/4804-11-0x00007FFFA5FC0000-0x00007FFFA6A81000-memory.dmp

Filesize
10.8MB

Download
memory/4804-12-0x000000001C250000-0x000000001C2A0000-memory.dmp

Filesize
320KB

Download
memory/4804-13-0x000000001C360000-0x000000001C412000-memory.dmp

Filesize
712KB

Download
memory/4804-14-0x00007FFFA5FC0000-0x00007FFFA6A81000-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