quasar | 5df3470db00597e3da516459648dfa6a2c1564a57c1d51817d952beeeb860a2c

General

Target

GoreboxModMenu1.2.0.exe
Size

3.1MB
MD5

1c1a86dad78326429577ab0b7b7b5858
SHA1

cf9aeb9a02d368918d89fc69d55b38829ab83039
SHA256

5df3470db00597e3da516459648dfa6a2c1564a57c1d51817d952beeeb860a2c
SHA512

db9658604a62090fd69cbb7504bf320c947473dfdb10be9e7e866af0a47db228755c1ff8e740eacbe20481df71bc5527347c4185e831515b30ab91b07e46b204
SSDEEP

49152:SvnI22SsaNYfdPBldt698dBcjH9pg1JbLoGdwnTHHB72eh2NT:SvI22SsaNYfdPBldt6+dBcjH9p4

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

192.168.1.101:4782

Mutex

20f2b2b5-8392-4fbe-9585-0778c516b863

Attributes

encryption_key
3A9499E06EC8E749CF7AE8F7D466BD97D9B2380C
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/2880-1-0x0000000000FD0000-0x00000000012F4000-memory.dmp	family_quasar
behavioral1/files/0x0012000000016d52-6.dat	family_quasar
behavioral1/memory/2644-10-0x0000000000F30000-0x0000000001254000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
2644	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
2744	schtasks.exe
2772	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2880	GoreboxModMenu1.2.0.exe
Token: SeDebugPrivilege	2644	Client.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
2644	Client.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
2644	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2644	Client.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2880 wrote to memory of 2744	2880	GoreboxModMenu1.2.0.exe	30
PID 2880 wrote to memory of 2744	2880	GoreboxModMenu1.2.0.exe	30
PID 2880 wrote to memory of 2744	2880	GoreboxModMenu1.2.0.exe	30
PID 2880 wrote to memory of 2644	2880	GoreboxModMenu1.2.0.exe	32
PID 2880 wrote to memory of 2644	2880	GoreboxModMenu1.2.0.exe	32
PID 2880 wrote to memory of 2644	2880	GoreboxModMenu1.2.0.exe	32
PID 2644 wrote to memory of 2772	2644	Client.exe	33
PID 2644 wrote to memory of 2772	2644	Client.exe	33
PID 2644 wrote to memory of 2772	2644	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\GoreboxModMenu1.2.0.exe
"C:\Users\Admin\AppData\Local\Temp\GoreboxModMenu1.2.0.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2880
- 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:2744
- 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:2644
- - 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:2772

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
1c1a86dad78326429577ab0b7b7b5858

SHA1
cf9aeb9a02d368918d89fc69d55b38829ab83039

SHA256
5df3470db00597e3da516459648dfa6a2c1564a57c1d51817d952beeeb860a2c

SHA512
db9658604a62090fd69cbb7504bf320c947473dfdb10be9e7e866af0a47db228755c1ff8e740eacbe20481df71bc5527347c4185e831515b30ab91b07e46b204

Download Submit
memory/2644-9-0x000007FEF5A50000-0x000007FEF643C000-memory.dmp

Filesize
9.9MB

Download
memory/2644-10-0x0000000000F30000-0x0000000001254000-memory.dmp

Filesize
3.1MB

Download
memory/2644-11-0x000007FEF5A50000-0x000007FEF643C000-memory.dmp

Filesize
9.9MB

Download
memory/2644-12-0x000007FEF5A50000-0x000007FEF643C000-memory.dmp

Filesize
9.9MB

Download
memory/2880-0-0x000007FEF5A53000-0x000007FEF5A54000-memory.dmp

Filesize
4KB

Download
memory/2880-1-0x0000000000FD0000-0x00000000012F4000-memory.dmp

Filesize
3.1MB

Download
memory/2880-2-0x000007FEF5A50000-0x000007FEF643C000-memory.dmp

Filesize
9.9MB

Download
memory/2880-8-0x000007FEF5A50000-0x000007FEF643C000-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