quasar | 1b1b94ab940b67362b81053bc1f533246f988db580f78d993e4e0080ce798a77

Analysis

max time kernel
33s
max time network
36s
platform
windows10-ltsc 2021_x64
resource
win10ltsc2021-20241023-en
resource tags

arch:x64arch:x86image:win10ltsc2021-20241023-enlocale:en-usos:windows10-ltsc 2021-x64system
submitted
09-11-2024 05:52

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General

Target

fuegoo.exe
Size

3.1MB
MD5

6c42adb53394b149f5b7361e26b6e1f2
SHA1

3fbeff6276d1145af91ea0db55612f93c9ea41b3
SHA256

1b1b94ab940b67362b81053bc1f533246f988db580f78d993e4e0080ce798a77
SHA512

65020f225af38e546a824ebf3cfd89647280ad1698dd41b4ff2f0356857dea13454c39ce5f2caea7f8918688cdd1fc0f558d17869fc02f1c593d08148c26c111
SSDEEP

49152:WvyI22SsaNYfdPBldt698dBcjHXMRJ6nbR3LoGdxTHHB72eh2NT:Wvf22SsaNYfdPBldt6+dBcjHXMRJ65

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

190.104.116.8:139

Mutex

e51e2b65-e963-4051-9736-67d57ed46798

Attributes

encryption_key
AEA258EF65BF1786F0F767C0BE2497ECC304C46F
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Quasar Client Startup
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/4528-1-0x00000000003B0000-0x00000000006D4000-memory.dmp	family_quasar
behavioral1/files/0x0028000000045073-3.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
2680	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
4252	schtasks.exe
4532	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4528	fuegoo.exe
Token: SeDebugPrivilege	2680	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2680	Client.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4528 wrote to memory of 4252	4528	fuegoo.exe	82
PID 4528 wrote to memory of 4252	4528	fuegoo.exe	82
PID 4528 wrote to memory of 2680	4528	fuegoo.exe	85
PID 4528 wrote to memory of 2680	4528	fuegoo.exe	85
PID 2680 wrote to memory of 4532	2680	Client.exe	88
PID 2680 wrote to memory of 4532	2680	Client.exe	88

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\fuegoo.exe
"C:\Users\Admin\AppData\Local\Temp\fuegoo.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4528
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:4252
- 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:2680
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:4532

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
6c42adb53394b149f5b7361e26b6e1f2

SHA1
3fbeff6276d1145af91ea0db55612f93c9ea41b3

SHA256
1b1b94ab940b67362b81053bc1f533246f988db580f78d993e4e0080ce798a77

SHA512
65020f225af38e546a824ebf3cfd89647280ad1698dd41b4ff2f0356857dea13454c39ce5f2caea7f8918688cdd1fc0f558d17869fc02f1c593d08148c26c111

Download Submit
memory/2680-6-0x00007FFD52A60000-0x00007FFD53522000-memory.dmp

Filesize
10.8MB

Download
memory/2680-7-0x00007FFD52A60000-0x00007FFD53522000-memory.dmp

Filesize
10.8MB

Download
memory/2680-8-0x000000001BAF0000-0x000000001BB40000-memory.dmp

Filesize
320KB

Download
memory/2680-9-0x000000001CCA0000-0x000000001CD52000-memory.dmp

Filesize
712KB

Download
memory/2680-10-0x00007FFD52A60000-0x00007FFD53522000-memory.dmp

Filesize
10.8MB

Download
memory/4528-0-0x00007FFD52A63000-0x00007FFD52A65000-memory.dmp

Filesize
8KB

Download
memory/4528-1-0x00000000003B0000-0x00000000006D4000-memory.dmp

Filesize
3.1MB

Download
memory/4528-2-0x00007FFD52A60000-0x00007FFD53522000-memory.dmp

Filesize
10.8MB

Download
memory/4528-5-0x00007FFD52A60000-0x00007FFD53522000-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