quasar | a9fc07683b0c89a1a3cfba37fd4548e6b28ebf334dca8cf79d4edada41ece724

Analysis

max time kernel
121s
max time network
138s
platform
windows10-ltsc 2021_x64
resource
win10ltsc2021-20241023-en
resource tags

arch:x64arch:x86image:win10ltsc2021-20241023-enlocale:en-usos:windows10-ltsc 2021-x64system
submitted
04/12/2024, 20:41

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General

Target

Top4smm Dinero Ilimitado.zip
Size

1.1MB
MD5

bfa47aae21e145867fa2536f3adb0fbb
SHA1

b7b6eaccdf32b323421b75ad8e4e420a4527b151
SHA256

a9fc07683b0c89a1a3cfba37fd4548e6b28ebf334dca8cf79d4edada41ece724
SHA512

8ca4870f1949aaf6476b3ed18bfa5764110184242d0ae2d631b28b618cb167ec4de3267776be67a6bfd1de66e5f777fc75d25a8de2c75ef16578637f514906ae
SSDEEP

24576:+NEcxEieY4MkUNZfAzaSbhDmRsYyAo1GMvTSplXql0pDAkddsid2g4:6Ecx5UUnfW9qRU4E2lXSH0sidD4

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/files/0x0003000000000343-2.dat	family_quasar
behavioral1/memory/5064-5-0x00000000006A0000-0x00000000009D2000-memory.dmp	family_quasar

Executes dropped EXE 2 IoCs

pid	Process
5064	Top4smm Dinero Ilimitado.exe
3720	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
4676	schtasks.exe
3296	schtasks.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeRestorePrivilege	3856	7zFM.exe
Token: 35	3856	7zFM.exe
Token: SeSecurityPrivilege	3856	7zFM.exe
Token: SeDebugPrivilege	5064	Top4smm Dinero Ilimitado.exe
Token: SeDebugPrivilege	3720	WindowsUpdate.exe

Suspicious use of FindShellTrayWindow 2 IoCs

pid	Process
3856	7zFM.exe
3856	7zFM.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3720	WindowsUpdate.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 5064 wrote to memory of 4676	5064	Top4smm Dinero Ilimitado.exe	95
PID 5064 wrote to memory of 4676	5064	Top4smm Dinero Ilimitado.exe	95
PID 5064 wrote to memory of 3720	5064	Top4smm Dinero Ilimitado.exe	97
PID 5064 wrote to memory of 3720	5064	Top4smm Dinero Ilimitado.exe	97
PID 3720 wrote to memory of 3296	3720	WindowsUpdate.exe	98
PID 3720 wrote to memory of 3296	3720	WindowsUpdate.exe	98

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:\Program Files\7-Zip\7zFM.exe
"C:\Program Files\7-Zip\7zFM.exe" "C:\Users\Admin\AppData\Local\Temp\Top4smm Dinero Ilimitado.zip"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
PID:3856

C:\Users\Admin\Desktop\Top4smm Dinero Ilimitado.exe
"C:\Users\Admin\Desktop\Top4smm Dinero Ilimitado.exe"
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:5064
- 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:4676
- 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:3720
- - 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:3296

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\Desktop\Top4smm Dinero Ilimitado.exe

Filesize
3.2MB

MD5
74474ce327c2d8e2b74eba981a7e3249

SHA1
48544696b4ce7c96559a791efb58ec7481092454

SHA256
46ca3722c1851d6a68aea45c19e64a4c735eb236403e172422d02bbff4e35cca

SHA512
0c5b75305b19e0dcaacb9f3df556cdb136c002a5732625cb096fdd0a69e4a6a4b96507bb2948b847e2726d98e424462a237e0c0cecb1210c45cef52c7c1accc1

Download Submit
memory/3720-10-0x000000001BA20000-0x000000001BA70000-memory.dmp

Filesize
320KB

Download
memory/3720-11-0x000000001CB80000-0x000000001CC32000-memory.dmp

Filesize
712KB

Download
memory/3720-12-0x0000000003000000-0x0000000003012000-memory.dmp

Filesize
72KB

Download
memory/3720-13-0x000000001CAC0000-0x000000001CAFC000-memory.dmp

Filesize
240KB

Download
memory/5064-4-0x00007FFEFEA03000-0x00007FFEFEA05000-memory.dmp

Filesize
8KB

Download
memory/5064-5-0x00000000006A0000-0x00000000009D2000-memory.dmp

Filesize
3.2MB

Download
memory/5064-6-0x00007FFEFEA00000-0x00007FFEFF4C2000-memory.dmp

Filesize
10.8MB

Download
memory/5064-9-0x00007FFEFEA00000-0x00007FFEFF4C2000-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