quasar | 6872f02318d5f28b83c7a19dab208002c06bc3261b8af28ce5ab46c5048e342b

Analysis

max time kernel
52s
max time network
54s
platform
windows10-ltsc 2021_x64
resource
win10ltsc2021-20241211-en
resource tags

arch:x64arch:x86image:win10ltsc2021-20241211-enlocale:en-usos:windows10-ltsc 2021-x64system
submitted
17-12-2024 22:10

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General

Target

Client-built.exe
Size

3.1MB
MD5

b460be0db90b88f054f802bcb15c3085
SHA1

b3b4faa9d76b3b7c1a595d86b72105b9e42c564e
SHA256

6872f02318d5f28b83c7a19dab208002c06bc3261b8af28ce5ab46c5048e342b
SHA512

86b9d397e1320c960871d97dbb7fcc02a59bddd8b4fb9d9094a08856e8b6266fd525cbb89c857ba1907f356f4172bca9fdfefc0b26da47c7fb7e8d82ebb845f0
SSDEEP

49152:LvilL26AaNeWgPhlmVqvMQ7XSKYWBCpfoGdD4THHB72eh2NT:LvaL26AaNeWgPhlmVqkQ7XSKYWBCZ

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

science-attract.gl.at.ply.gg:4444

Mutex

6ad33fe9-6ed2-45c9-940d-96954b1558e6

Attributes

encryption_key
E040A051368780825E373BF53836EF5E3A5FBF62
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
WindowsDefender.exe
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
behavioral1/memory/1700-1-0x0000000000AD0000-0x0000000000DF4000-memory.dmp	family_quasar
behavioral1/files/0x0028000000046190-3.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
2240	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
360	schtasks.exe
4372	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1700	Client-built.exe
Token: SeDebugPrivilege	2240	Client.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1700 wrote to memory of 360	1700	Client-built.exe	83
PID 1700 wrote to memory of 360	1700	Client-built.exe	83
PID 1700 wrote to memory of 2240	1700	Client-built.exe	85
PID 1700 wrote to memory of 2240	1700	Client-built.exe	85
PID 2240 wrote to memory of 4372	2240	Client.exe	86
PID 2240 wrote to memory of 4372	2240	Client.exe	86

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:1700
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "WindowsDefender.exe" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:360
- 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 WriteProcessMemory
  PID:2240
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "WindowsDefender.exe" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:4372

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

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
b460be0db90b88f054f802bcb15c3085

SHA1
b3b4faa9d76b3b7c1a595d86b72105b9e42c564e

SHA256
6872f02318d5f28b83c7a19dab208002c06bc3261b8af28ce5ab46c5048e342b

SHA512
86b9d397e1320c960871d97dbb7fcc02a59bddd8b4fb9d9094a08856e8b6266fd525cbb89c857ba1907f356f4172bca9fdfefc0b26da47c7fb7e8d82ebb845f0

Download Submit
memory/1700-0-0x00007FFCE8563000-0x00007FFCE8565000-memory.dmp

Filesize
8KB

Download
memory/1700-1-0x0000000000AD0000-0x0000000000DF4000-memory.dmp

Filesize
3.1MB

Download
memory/1700-2-0x00007FFCE8560000-0x00007FFCE9022000-memory.dmp

Filesize
10.8MB

Download
memory/1700-5-0x00007FFCE8560000-0x00007FFCE9022000-memory.dmp

Filesize
10.8MB

Download
memory/2240-6-0x00007FFCE8560000-0x00007FFCE9022000-memory.dmp

Filesize
10.8MB

Download
memory/2240-7-0x00007FFCE8560000-0x00007FFCE9022000-memory.dmp

Filesize
10.8MB

Download
memory/2240-8-0x000000001B0E0000-0x000000001B130000-memory.dmp

Filesize
320KB

Download
memory/2240-9-0x000000001D970000-0x000000001DA22000-memory.dmp

Filesize
712KB

Download
memory/2240-10-0x00007FFCE8560000-0x00007FFCE9022000-memory.dmp

Filesize
10.8MB

Download

Analysis

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General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads