quasar | 6c05bdd9bfaaab482d1261c53bd31ec000b9c6a401e8a9f40684217d4c3805cd

General

Target

6c05bdd9bfaaab482d1261c53bd31ec000b9c6a401e8a9f40684217d4c3805cd.exe
Size

3.1MB
MD5

8e2f41a8da48ee3bb6d533d7de12d621
SHA1

4b4f1bbfc8e8570668b55f1157791879fc272a6b
SHA256

6c05bdd9bfaaab482d1261c53bd31ec000b9c6a401e8a9f40684217d4c3805cd
SHA512

fb78fabf6e4b4e52b375f63b687ea6758efa05a7a1b67c2df5c18cdbb9382bb34f768d340cb8386432a8b52fc7893d807409dd4857c3f46cdec54bc5745224d0
SSDEEP

49152:CvyI22SsaNYfdPBldt698dBcjHmIxNESEHk/inLoGdxTHHB72eh2NT:Cvf22SsaNYfdPBldt6+dBcjHdxWL

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

192.168.1.116:4782

Mutex

7bcc4347-f38d-44cb-b66e-2a087c7e915f

Attributes

encryption_key
84ADCD6EA0C9BEC44FAF54AEA226EC9015B89296
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Windows Services
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/2212-1-0x0000000000B10000-0x0000000000E34000-memory.dmp	family_quasar
behavioral1/files/0x0034000000016d64-6.dat	family_quasar
behavioral1/memory/2708-9-0x00000000011B0000-0x00000000014D4000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
2708	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

pid	Process
2796	schtasks.exe
2584	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2212	6c05bdd9bfaaab482d1261c53bd31ec000b9c6a401e8a9f40684217d4c3805cd.exe
Token: SeDebugPrivilege	2708	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2708	Client.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2212 wrote to memory of 2796	2212	6c05bdd9bfaaab482d1261c53bd31ec000b9c6a401e8a9f40684217d4c3805cd.exe	30
PID 2212 wrote to memory of 2796	2212	6c05bdd9bfaaab482d1261c53bd31ec000b9c6a401e8a9f40684217d4c3805cd.exe	30
PID 2212 wrote to memory of 2796	2212	6c05bdd9bfaaab482d1261c53bd31ec000b9c6a401e8a9f40684217d4c3805cd.exe	30
PID 2212 wrote to memory of 2708	2212	6c05bdd9bfaaab482d1261c53bd31ec000b9c6a401e8a9f40684217d4c3805cd.exe	32
PID 2212 wrote to memory of 2708	2212	6c05bdd9bfaaab482d1261c53bd31ec000b9c6a401e8a9f40684217d4c3805cd.exe	32
PID 2212 wrote to memory of 2708	2212	6c05bdd9bfaaab482d1261c53bd31ec000b9c6a401e8a9f40684217d4c3805cd.exe	32
PID 2708 wrote to memory of 2584	2708	Client.exe	33
PID 2708 wrote to memory of 2584	2708	Client.exe	33
PID 2708 wrote to memory of 2584	2708	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\6c05bdd9bfaaab482d1261c53bd31ec000b9c6a401e8a9f40684217d4c3805cd.exe
"C:\Users\Admin\AppData\Local\Temp\6c05bdd9bfaaab482d1261c53bd31ec000b9c6a401e8a9f40684217d4c3805cd.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2212
- C:\Windows\system32\schtasks.exe
  "schtasks" /create /tn "Windows Services" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2796
- 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:2708
- - C:\Windows\system32\schtasks.exe
    "schtasks" /create /tn "Windows Services" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2584

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
8e2f41a8da48ee3bb6d533d7de12d621

SHA1
4b4f1bbfc8e8570668b55f1157791879fc272a6b

SHA256
6c05bdd9bfaaab482d1261c53bd31ec000b9c6a401e8a9f40684217d4c3805cd

SHA512
fb78fabf6e4b4e52b375f63b687ea6758efa05a7a1b67c2df5c18cdbb9382bb34f768d340cb8386432a8b52fc7893d807409dd4857c3f46cdec54bc5745224d0

Download Submit
memory/2212-0-0x000007FEF61C3000-0x000007FEF61C4000-memory.dmp

Filesize
4KB

Download
memory/2212-1-0x0000000000B10000-0x0000000000E34000-memory.dmp

Filesize
3.1MB

Download
memory/2212-2-0x000007FEF61C0000-0x000007FEF6BAC000-memory.dmp

Filesize
9.9MB

Download
memory/2212-8-0x000007FEF61C0000-0x000007FEF6BAC000-memory.dmp

Filesize
9.9MB

Download
memory/2708-9-0x00000000011B0000-0x00000000014D4000-memory.dmp

Filesize
3.1MB

Download
memory/2708-11-0x000007FEF61C0000-0x000007FEF6BAC000-memory.dmp

Filesize
9.9MB

Download
memory/2708-10-0x000007FEF61C0000-0x000007FEF6BAC000-memory.dmp

Filesize
9.9MB

Download
memory/2708-12-0x000007FEF61C0000-0x000007FEF6BAC000-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