quasar | f689e73ba9027c5f1caf115781dd50902c0547fa6d94dd528c017b3542706238

Analysis

max time kernel
17s
max time network
22s
platform
windows10-ltsc 2021_x64
resource
win10ltsc2021-20241211-en
resource tags

arch:x64arch:x86image:win10ltsc2021-20241211-enlocale:en-usos:windows10-ltsc 2021-x64system
submitted
14-12-2024 01:22

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General

Target

IMVUDineroIlimitado.zip
Size

1.1MB
MD5

d1b46b9e842bbe1fa9dc8e661461aba7
SHA1

7da0f22329924470c51f6424effd443fe823b199
SHA256

f689e73ba9027c5f1caf115781dd50902c0547fa6d94dd528c017b3542706238
SHA512

8aaad8aab1d6e0f1cea17a46a3822c5089d540f37bf38d13829b56c81695fcc6c68de61e44d069c82c0b0d9c29065ad127477c86f844f1789395670c2de1878b
SSDEEP

24576:uM0PoBjgDxvd0pmwrY/gldIOfQqGVLfF1WPHSYFnrpeRt7h55:uDZ0pmjrOoqGVLL6HSYFFeR9t

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/0x00280000000461b5-2.dat	family_quasar
behavioral1/memory/3624-5-0x0000000000850000-0x0000000000BA2000-memory.dmp	family_quasar

Executes dropped EXE 2 IoCs

pid	Process
3624	IMVUDineroIlimitado.exe
2368	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
1812	schtasks.exe
3456	schtasks.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeRestorePrivilege	1308	7zFM.exe
Token: 35	1308	7zFM.exe
Token: SeSecurityPrivilege	1308	7zFM.exe
Token: SeDebugPrivilege	3624	IMVUDineroIlimitado.exe
Token: SeDebugPrivilege	2368	WindowsUpdate.exe

Suspicious use of FindShellTrayWindow 2 IoCs

pid	Process
1308	7zFM.exe
1308	7zFM.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2368	WindowsUpdate.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3624 wrote to memory of 1812	3624	IMVUDineroIlimitado.exe	87
PID 3624 wrote to memory of 1812	3624	IMVUDineroIlimitado.exe	87
PID 3624 wrote to memory of 2368	3624	IMVUDineroIlimitado.exe	89
PID 3624 wrote to memory of 2368	3624	IMVUDineroIlimitado.exe	89
PID 2368 wrote to memory of 3456	2368	WindowsUpdate.exe	90
PID 2368 wrote to memory of 3456	2368	WindowsUpdate.exe	90

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\IMVUDineroIlimitado.zip"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
PID:1308

C:\Users\Admin\Desktop\IMVUDineroIlimitado.exe
"C:\Users\Admin\Desktop\IMVUDineroIlimitado.exe"
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3624
- 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:1812
- 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:2368
- - 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:3456

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\IMVUDineroIlimitado.exe

Filesize
3.3MB

MD5
507321e95801a8d7833c15613d60fa6f

SHA1
b5805546dbdff837b9a0f6c6e619ef660bb23b97

SHA256
5a3b284cfc49a72f3a28b91aad715c0181c13c10672433323569e92f15afa0c1

SHA512
bd3edf014ed1aed2aac6331307c07997dba8a5fe631cb1209eea7a3f72deb7901cc8175b73832142c9552a510f0e9d9d2cbf65008c961c4e26e992daab4c1dba

Download Submit
memory/2368-10-0x000000001B1F0000-0x000000001B240000-memory.dmp

Filesize
320KB

Download
memory/2368-11-0x000000001C330000-0x000000001C3E2000-memory.dmp

Filesize
712KB

Download
memory/2368-12-0x000000001B1B0000-0x000000001B1C2000-memory.dmp

Filesize
72KB

Download
memory/2368-13-0x000000001C2B0000-0x000000001C2EC000-memory.dmp

Filesize
240KB

Download
memory/3624-4-0x00007FFF0B753000-0x00007FFF0B755000-memory.dmp

Filesize
8KB

Download
memory/3624-5-0x0000000000850000-0x0000000000BA2000-memory.dmp

Filesize
3.3MB

Download
memory/3624-6-0x00007FFF0B750000-0x00007FFF0C212000-memory.dmp

Filesize
10.8MB

Download
memory/3624-9-0x00007FFF0B750000-0x00007FFF0C212000-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