quasar | 3b541b5dfba231ccc9a971f24469b8764360061643ac7510481ff9fea2b2f751

Analysis

max time kernel
34s
max time network
40s
platform
windows10-ltsc 2021_x64
resource
win10ltsc2021-20241211-en
resource tags

arch:x64arch:x86image:win10ltsc2021-20241211-enlocale:en-usos:windows10-ltsc 2021-x64system
submitted
15-12-2024 01:50

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General

Target

Fifa 17 Installer Complement.exe
Size

3.1MB
MD5

cc698361e8911889d46280f7f467cbe7
SHA1

125dd983ba5ef4b661ec6348d0fb746f6543bde9
SHA256

3b541b5dfba231ccc9a971f24469b8764360061643ac7510481ff9fea2b2f751
SHA512

3b3fdc15fcf8912da8a3b0512b20ec618108fd5208fe9de333f9c2dee54a4ee14ac19bfbe8ca68309872ec86ae7515c8d8f0dd7f6a56e8e8f0a72656b228d8bc
SSDEEP

49152:mvSI22SsaNYfdPBldt698dBcjH38d4jhrLoGdZaTHHB72eh2NT:mv/22SsaNYfdPBldt6+dBcjH38de

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

azxq0ap.localto.net:3425

Mutex

e51e2b65-e963-4051-9736-67d57ed46798

Attributes

encryption_key
AEA258EF65BF1786F0F767C0BE2497ECC304C46F
install_name
WindowsUpdate.exe
log_directory
Logs
reconnect_delay
3000
startup_key
WindowsUpdate
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/3108-1-0x0000000000090000-0x00000000003B6000-memory.dmp	family_quasar
behavioral1/files/0x0028000000046151-3.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
240	WindowsUpdate.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
4580	schtasks.exe
4860	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3108	Fifa 17 Installer Complement.exe
Token: SeDebugPrivilege	240	WindowsUpdate.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
240	WindowsUpdate.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3108 wrote to memory of 4580	3108	Fifa 17 Installer Complement.exe	82
PID 3108 wrote to memory of 4580	3108	Fifa 17 Installer Complement.exe	82
PID 3108 wrote to memory of 240	3108	Fifa 17 Installer Complement.exe	84
PID 3108 wrote to memory of 240	3108	Fifa 17 Installer Complement.exe	84
PID 240 wrote to memory of 4860	240	WindowsUpdate.exe	85
PID 240 wrote to memory of 4860	240	WindowsUpdate.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\Fifa 17 Installer Complement.exe
"C:\Users\Admin\AppData\Local\Temp\Fifa 17 Installer Complement.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3108
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "WindowsUpdate" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\WindowsUpdate.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:4580
- C:\Users\Admin\AppData\Roaming\SubDir\WindowsUpdate.exe
  "C:\Users\Admin\AppData\Roaming\SubDir\WindowsUpdate.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:240
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "WindowsUpdate" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\WindowsUpdate.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:4860

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

Replay Monitor

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Downloads

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

Filesize
3.1MB

MD5
cc698361e8911889d46280f7f467cbe7

SHA1
125dd983ba5ef4b661ec6348d0fb746f6543bde9

SHA256
3b541b5dfba231ccc9a971f24469b8764360061643ac7510481ff9fea2b2f751

SHA512
3b3fdc15fcf8912da8a3b0512b20ec618108fd5208fe9de333f9c2dee54a4ee14ac19bfbe8ca68309872ec86ae7515c8d8f0dd7f6a56e8e8f0a72656b228d8bc

Download Submit
memory/240-6-0x00007FFEB71D0000-0x00007FFEB7C92000-memory.dmp

Filesize
10.8MB

Download
memory/240-7-0x00007FFEB71D0000-0x00007FFEB7C92000-memory.dmp

Filesize
10.8MB

Download
memory/240-8-0x000000001CFC0000-0x000000001D010000-memory.dmp

Filesize
320KB

Download
memory/240-9-0x000000001D0D0000-0x000000001D182000-memory.dmp

Filesize
712KB

Download
memory/240-10-0x000000001D010000-0x000000001D022000-memory.dmp

Filesize
72KB

Download
memory/240-11-0x000000001D070000-0x000000001D0AC000-memory.dmp

Filesize
240KB

Download
memory/240-12-0x00007FFEB71D0000-0x00007FFEB7C92000-memory.dmp

Filesize
10.8MB

Download
memory/3108-0-0x00007FFEB71D3000-0x00007FFEB71D5000-memory.dmp

Filesize
8KB

Download
memory/3108-1-0x0000000000090000-0x00000000003B6000-memory.dmp

Filesize
3.1MB

Download
memory/3108-2-0x00007FFEB71D0000-0x00007FFEB7C92000-memory.dmp

Filesize
10.8MB

Download
memory/3108-5-0x00007FFEB71D0000-0x00007FFEB7C92000-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