quasar | 9e9ff4b542d31bc8a8a52099758c9cb274727d341881c8df448d8f33ffc20117

Analysis

max time kernel
148s
max time network
150s
platform
windows7_x64
resource
win7-20241023-en
resource tags

arch:x64arch:x86image:win7-20241023-enlocale:en-usos:windows7-x64system
submitted
31-10-2024 01:21

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General

Target

Client-built.exe
Size

3.1MB
MD5

fa0417d4b9f177a8cecfd88b345a7b28
SHA1

85770ee9f13a58e5eb95fcfb3868fcf626ad6552
SHA256

9e9ff4b542d31bc8a8a52099758c9cb274727d341881c8df448d8f33ffc20117
SHA512

f7d6ae87130fb63da8c53a26e384d364b2706096f3cce6a74add75ed62c50e6b93748e388eae27132b772a5e017db1166c519a946a067d46157917f2f638b79e
SSDEEP

49152:mv0t62XlaSFNWPjljiFa2RoUYIDQOEEfsUk/HYEoGdBVTHHB72eh2NT:mvo62XlaSFNWPjljiFXRoUYIDQOG/

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

10.127.0.227:4782

Mutex

cc382a3d-9ce3-4b59-ba4b-40acd01a72a5

Attributes

encryption_key
955952829EF4D4C700D061DBC84790B29C3FF5DD
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Java update
subdirectory
SubDir

Signatures

Quasar RAT
Quasar is an open source Remote Access Tool.
trojan spyware quasar
Quasar family
quasar

Quasar payload 1 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2360-1-0x0000000000810000-0x0000000000B34000-memory.dmp	family_quasar

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 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

Processes:

schtasks.exe

pid	Process
1652	schtasks.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

Client-built.exe

description	pid	Process
Token: SeDebugPrivilege	2360	Client-built.exe

Suspicious use of FindShellTrayWindow 1 IoCs

Processes:

Client-built.exe

pid	Process
2360	Client-built.exe

Suspicious use of SendNotifyMessage 1 IoCs

Processes:

Client-built.exe

pid	Process
2360	Client-built.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

Client-built.exe

description	pid	Process	procid_target
PID 2360 wrote to memory of 1652	2360	Client-built.exe	31
PID 2360 wrote to memory of 1652	2360	Client-built.exe	31
PID 2360 wrote to memory of 1652	2360	Client-built.exe	31

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\Client-built.exe
"C:\Users\Admin\AppData\Local\Temp\Client-built.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:2360
- C:\Windows\system32\schtasks.exe
  "schtasks" /create /tn "Java update" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:1652

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/2360-0-0x000007FEF5CB3000-0x000007FEF5CB4000-memory.dmp

Filesize
4KB

Download
memory/2360-1-0x0000000000810000-0x0000000000B34000-memory.dmp

Filesize
3.1MB

Download
memory/2360-2-0x000007FEF5CB0000-0x000007FEF669C000-memory.dmp

Filesize
9.9MB

Download
memory/2360-3-0x000007FEF5CB3000-0x000007FEF5CB4000-memory.dmp

Filesize
4KB

Download
memory/2360-4-0x000007FEF5CB0000-0x000007FEF669C000-memory.dmp

Filesize
9.9MB

Download