quasar | 5f541a16b678fb79fe6dc150a57108881efc9d392e77644024e288a38c02ff29

Analysis

max time kernel
94s
max time network
144s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
17-01-2025 11:56

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General

Target

9aae678c7cea5987d5092a61623207e2.exe
Size

502KB
MD5

9aae678c7cea5987d5092a61623207e2
SHA1

0243213e394988c281596785b9cdd3c5c8db0253
SHA256

5f541a16b678fb79fe6dc150a57108881efc9d392e77644024e288a38c02ff29
SHA512

1f4e1df5d6936048456b493ed2d4268f611b94940f51b41c3c70f925306b451201d882e59031c80cd265ecbe84e0e22f57cc2f5446a9390a87973254db034be9
SSDEEP

12288:1TEgdfYXxURT3qh4kywJUpvZKJyRXMUykUcdW:WUw+25ywJUpvZKJGn8cdW

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.0

Botnet

Office04

93.177.102.208:1337

Mutex

b1f80fe6-27eb-4a1c-bb91-851d5cd8d500

Attributes

encryption_key
9C554DBE5929DA2C3E389A9DF35A30153D68038C
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Java Updater
subdirectory
SubDir

Signatures

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

Quasar payload 2 IoCs

resource	yara_rule
behavioral2/memory/2156-1-0x0000000000A90000-0x0000000000B14000-memory.dmp	family_quasar
behavioral2/files/0x0007000000023cc4-5.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
4564	Client.exe

Looks up external IP address via web service 2 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
16	api.ipify.org
17	api.ipify.org

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
3228	schtasks.exe
3760	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2156	9aae678c7cea5987d5092a61623207e2.exe
Token: SeDebugPrivilege	4564	Client.exe

Suspicious use of FindShellTrayWindow 2 IoCs

pid	Process
4564	Client.exe
4564	Client.exe

Suspicious use of SendNotifyMessage 2 IoCs

pid	Process
4564	Client.exe
4564	Client.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2156 wrote to memory of 3228	2156	9aae678c7cea5987d5092a61623207e2.exe	82
PID 2156 wrote to memory of 3228	2156	9aae678c7cea5987d5092a61623207e2.exe	82
PID 2156 wrote to memory of 4564	2156	9aae678c7cea5987d5092a61623207e2.exe	84
PID 2156 wrote to memory of 4564	2156	9aae678c7cea5987d5092a61623207e2.exe	84
PID 4564 wrote to memory of 3760	4564	Client.exe	85
PID 4564 wrote to memory of 3760	4564	Client.exe	85

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\9aae678c7cea5987d5092a61623207e2.exe
"C:\Users\Admin\AppData\Local\Temp\9aae678c7cea5987d5092a61623207e2.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2156
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "Java Updater" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\9aae678c7cea5987d5092a61623207e2.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:3228
- 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 WriteProcessMemory
  PID:4564
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "Java Updater" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:3760

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

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Downloads

C:\Users\Admin\AppData\Roaming\SubDir\Client.exe

Filesize
502KB

MD5
9aae678c7cea5987d5092a61623207e2

SHA1
0243213e394988c281596785b9cdd3c5c8db0253

SHA256
5f541a16b678fb79fe6dc150a57108881efc9d392e77644024e288a38c02ff29

SHA512
1f4e1df5d6936048456b493ed2d4268f611b94940f51b41c3c70f925306b451201d882e59031c80cd265ecbe84e0e22f57cc2f5446a9390a87973254db034be9

Download Submit
memory/2156-0-0x00007FFFE13C3000-0x00007FFFE13C5000-memory.dmp

Filesize
8KB

Download
memory/2156-1-0x0000000000A90000-0x0000000000B14000-memory.dmp

Filesize
528KB

Download
memory/2156-2-0x00007FFFE13C0000-0x00007FFFE1E81000-memory.dmp

Filesize
10.8MB

Download
memory/2156-9-0x00007FFFE13C0000-0x00007FFFE1E81000-memory.dmp

Filesize
10.8MB

Download
memory/4564-8-0x00007FFFE13C0000-0x00007FFFE1E81000-memory.dmp

Filesize
10.8MB

Download
memory/4564-10-0x00007FFFE13C0000-0x00007FFFE1E81000-memory.dmp

Filesize
10.8MB

Download
memory/4564-11-0x000000001DBE0000-0x000000001DC30000-memory.dmp

Filesize
320KB

Download
memory/4564-12-0x000000001DCF0000-0x000000001DDA2000-memory.dmp

Filesize
712KB

Download
memory/4564-15-0x00007FFFE13C0000-0x00007FFFE1E81000-memory.dmp

Filesize
10.8MB

Download
memory/4564-16-0x00007FFFE13C0000-0x00007FFFE1E81000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads