quasar | 55d23f7ddba20f057e61b777b3224255b9edf3f126eb30bb24a22cdfe55f8682

General

Target

KMod Mod Menu.exe
Size

3.1MB
MD5

cb709d5219f90d690c5d344583951b8e
SHA1

ef7cf1c88408a140a1224f3fa6dbcde8c6ed63cd
SHA256

55d23f7ddba20f057e61b777b3224255b9edf3f126eb30bb24a22cdfe55f8682
SHA512

edcff976d067281898bf6ca8b64c971c456fa92afa4e38e22af9cf9f0ec0701e4e114d196c200a4412c9600326a1cafe7edd394a5575c17e744aa167a1cb1139
SSDEEP

49152:3vyI22SsaNYfdPBldt698dBcjHoCt1JBLoGdVeTHHB72eh2NT:3vf22SsaNYfdPBldt6+dBcjHoCb

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

192.168.1.126:4782

Mutex

9be81df8-796e-4238-9ce9-95e1df50d0cc

Attributes

encryption_key
911A94FD4CE2636A220E82F01C7CC3383A2C3D0C
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

Processes:

resource	yara_rule
behavioral1/memory/1056-1-0x0000000000C80000-0x0000000000FA4000-memory.dmp	family_quasar
C:\Users\Admin\AppData\Roaming\SubDir\Client.exe	family_quasar
behavioral1/memory/2124-10-0x0000000001210000-0x0000000001534000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

Processes:

Client.exe

pid process

2124 Client.exe
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

Processes:

schtasks.exeschtasks.exe

pid process

2876 schtasks.exe
2932 schtasks.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

KMod Mod Menu.exeClient.exe

description pid process

Token: SeDebugPrivilege 1056 KMod Mod Menu.exe
Token: SeDebugPrivilege 2124 Client.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

Client.exe

pid process

2124 Client.exe

pid	process
2124	Client.exe

pid	process
2876	schtasks.exe
2932	schtasks.exe

description	pid	process
Token: SeDebugPrivilege	1056	KMod Mod Menu.exe
Token: SeDebugPrivilege	2124	Client.exe

pid	process
2124	Client.exe

Suspicious use of WriteProcessMemory 9 IoCs

Processes:

KMod Mod Menu.exeClient.exe

description	pid	process	target process
PID 1056 wrote to memory of 2876	1056	KMod Mod Menu.exe	schtasks.exe
PID 1056 wrote to memory of 2876	1056	KMod Mod Menu.exe	schtasks.exe
PID 1056 wrote to memory of 2876	1056	KMod Mod Menu.exe	schtasks.exe
PID 1056 wrote to memory of 2124	1056	KMod Mod Menu.exe	Client.exe
PID 1056 wrote to memory of 2124	1056	KMod Mod Menu.exe	Client.exe
PID 1056 wrote to memory of 2124	1056	KMod Mod Menu.exe	Client.exe
PID 2124 wrote to memory of 2932	2124	Client.exe	schtasks.exe
PID 2124 wrote to memory of 2932	2124	Client.exe	schtasks.exe
PID 2124 wrote to memory of 2932	2124	Client.exe	schtasks.exe

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\KMod Mod Menu.exe
"C:\Users\Admin\AppData\Local\Temp\KMod Mod Menu.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1056
- 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:2876
- 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 SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2124
- - 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:2932

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

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
cb709d5219f90d690c5d344583951b8e

SHA1
ef7cf1c88408a140a1224f3fa6dbcde8c6ed63cd

SHA256
55d23f7ddba20f057e61b777b3224255b9edf3f126eb30bb24a22cdfe55f8682

SHA512
edcff976d067281898bf6ca8b64c971c456fa92afa4e38e22af9cf9f0ec0701e4e114d196c200a4412c9600326a1cafe7edd394a5575c17e744aa167a1cb1139

Download Submit
memory/1056-0-0x000007FEF4F13000-0x000007FEF4F14000-memory.dmp

Filesize
4KB

Download
memory/1056-1-0x0000000000C80000-0x0000000000FA4000-memory.dmp

Filesize
3.1MB

Download
memory/1056-2-0x000007FEF4F10000-0x000007FEF58FC000-memory.dmp

Filesize
9.9MB

Download
memory/1056-8-0x000007FEF4F10000-0x000007FEF58FC000-memory.dmp

Filesize
9.9MB

Download
memory/2124-9-0x000007FEF4F10000-0x000007FEF58FC000-memory.dmp

Filesize
9.9MB

Download
memory/2124-10-0x0000000001210000-0x0000000001534000-memory.dmp

Filesize
3.1MB

Download
memory/2124-11-0x000007FEF4F10000-0x000007FEF58FC000-memory.dmp

Filesize
9.9MB

Download
memory/2124-12-0x000007FEF4F10000-0x000007FEF58FC000-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