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 3 IoCs

resource	yara_rule
behavioral1/memory/2088-1-0x0000000000D50000-0x0000000001074000-memory.dmp	family_quasar
behavioral1/files/0x000700000001945b-6.dat	family_quasar
behavioral1/memory/2924-9-0x0000000000F10000-0x0000000001234000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
2924	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
1716	schtasks.exe
1648	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2088	dd4680359347745aa7ce45caf96c90d366e178f1602abbedd0129d1ac37288f9.exe
Token: SeDebugPrivilege	2924	Client.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
2924	Client.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
2924	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2924	Client.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2088 wrote to memory of 1716	2088	dd4680359347745aa7ce45caf96c90d366e178f1602abbedd0129d1ac37288f9.exe	30
PID 2088 wrote to memory of 1716	2088	dd4680359347745aa7ce45caf96c90d366e178f1602abbedd0129d1ac37288f9.exe	30
PID 2088 wrote to memory of 1716	2088	dd4680359347745aa7ce45caf96c90d366e178f1602abbedd0129d1ac37288f9.exe	30
PID 2088 wrote to memory of 2924	2088	dd4680359347745aa7ce45caf96c90d366e178f1602abbedd0129d1ac37288f9.exe	32
PID 2088 wrote to memory of 2924	2088	dd4680359347745aa7ce45caf96c90d366e178f1602abbedd0129d1ac37288f9.exe	32
PID 2088 wrote to memory of 2924	2088	dd4680359347745aa7ce45caf96c90d366e178f1602abbedd0129d1ac37288f9.exe	32
PID 2924 wrote to memory of 1648	2924	Client.exe	33
PID 2924 wrote to memory of 1648	2924	Client.exe	33
PID 2924 wrote to memory of 1648	2924	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\dd4680359347745aa7ce45caf96c90d366e178f1602abbedd0129d1ac37288f9.exe
"C:\Users\Admin\AppData\Local\Temp\dd4680359347745aa7ce45caf96c90d366e178f1602abbedd0129d1ac37288f9.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2088
- 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:1716
- 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:2924
- - 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:1648

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/2088-0-0x000007FEF5DC3000-0x000007FEF5DC4000-memory.dmp

Filesize
4KB

Download
memory/2088-1-0x0000000000D50000-0x0000000001074000-memory.dmp

Filesize
3.1MB

Download
memory/2088-2-0x000007FEF5DC0000-0x000007FEF67AC000-memory.dmp

Filesize
9.9MB

Download
memory/2088-8-0x000007FEF5DC0000-0x000007FEF67AC000-memory.dmp

Filesize
9.9MB

Download
memory/2924-9-0x0000000000F10000-0x0000000001234000-memory.dmp

Filesize
3.1MB

Download
memory/2924-11-0x000007FEF5DC0000-0x000007FEF67AC000-memory.dmp

Filesize
9.9MB

Download
memory/2924-10-0x000007FEF5DC0000-0x000007FEF67AC000-memory.dmp

Filesize
9.9MB

Download
memory/2924-12-0x000007FEF5DC0000-0x000007FEF67AC000-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