quasar | 0ffa441a13f140ff08492899f44d4d30288f193e68a1affcc0d62e617d1532cd

Analysis

max time kernel
94s
max time network
138s
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 05:19

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General

Target

Client-built.exe
Size

502KB
MD5

aebbee96c927750b5c6eec97940acc19
SHA1

fea20780c2b137ecea31544aa089f67ba4672ffd
SHA256

0ffa441a13f140ff08492899f44d4d30288f193e68a1affcc0d62e617d1532cd
SHA512

8f865a6381329cfcf5715366de9a6cce6fbb83b02643b816ea78cfe8f31b5b67bea4bce0b25d181268c3637853137f2b866f407047a5d66575c90547ccdd9af0
SSDEEP

6144:hTEgdc0Y2X7IxUpGREW8MIdTEDdKbDkQfocEiOb8F9rd9wkbIcTR3C:hTEgdfYXxUe2DkSpxwkbIcdC

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/3348-1-0x0000000000450000-0x00000000004D4000-memory.dmp	family_quasar
behavioral2/files/0x000a000000023bb0-5.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
768	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
4488	schtasks.exe
4480	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3348	Client-built.exe
Token: SeDebugPrivilege	768	Client.exe

Suspicious use of FindShellTrayWindow 2 IoCs

pid	Process
768	Client.exe
768	Client.exe

Suspicious use of SendNotifyMessage 2 IoCs

pid	Process
768	Client.exe
768	Client.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3348 wrote to memory of 4488	3348	Client-built.exe	82
PID 3348 wrote to memory of 4488	3348	Client-built.exe	82
PID 3348 wrote to memory of 768	3348	Client-built.exe	84
PID 3348 wrote to memory of 768	3348	Client-built.exe	84
PID 768 wrote to memory of 4480	768	Client.exe	85
PID 768 wrote to memory of 4480	768	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\Client-built.exe
"C:\Users\Admin\AppData\Local\Temp\Client-built.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3348
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "Java Updater" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\Client-built.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:4488
- 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:768
- - 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:4480

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
aebbee96c927750b5c6eec97940acc19

SHA1
fea20780c2b137ecea31544aa089f67ba4672ffd

SHA256
0ffa441a13f140ff08492899f44d4d30288f193e68a1affcc0d62e617d1532cd

SHA512
8f865a6381329cfcf5715366de9a6cce6fbb83b02643b816ea78cfe8f31b5b67bea4bce0b25d181268c3637853137f2b866f407047a5d66575c90547ccdd9af0

Download Submit
memory/768-7-0x00007FF9430B0000-0x00007FF943B71000-memory.dmp

Filesize
10.8MB

Download
memory/768-10-0x00007FF9430B0000-0x00007FF943B71000-memory.dmp

Filesize
10.8MB

Download
memory/768-11-0x000000001BF20000-0x000000001BF70000-memory.dmp

Filesize
320KB

Download
memory/768-12-0x000000001C030000-0x000000001C0E2000-memory.dmp

Filesize
712KB

Download
memory/768-15-0x00007FF9430B0000-0x00007FF943B71000-memory.dmp

Filesize
10.8MB

Download
memory/3348-0-0x00007FF9430B3000-0x00007FF9430B5000-memory.dmp

Filesize
8KB

Download
memory/3348-1-0x0000000000450000-0x00000000004D4000-memory.dmp

Filesize
528KB

Download
memory/3348-2-0x00007FF9430B0000-0x00007FF943B71000-memory.dmp

Filesize
10.8MB

Download
memory/3348-9-0x00007FF9430B0000-0x00007FF943B71000-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