quasar | 8a31693ddf8924f144ba19a8802766188bd13f1ed7eea7c226eb0e01a9e47685

Analysis

max time kernel
33s
max time network
41s
platform
windows10-ltsc 2021_x64
resource
win10ltsc2021-20241023-en
resource tags

arch:x64arch:x86image:win10ltsc2021-20241023-enlocale:en-usos:windows10-ltsc 2021-x64system
submitted
02-12-2024 07:42

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General

Target

PORQUEPUTASYANOSIRVE.7z
Size

923KB
MD5

d757d40193d311216967491e36fc2ba4
SHA1

2dd90fa74c489da4f85bdf301053230b480a31fa
SHA256

8a31693ddf8924f144ba19a8802766188bd13f1ed7eea7c226eb0e01a9e47685
SHA512

9be26ab222457605eea0c42a4dbcfa80154cb384e6abf0db6a010fcca172a0eda8792b9e3fff9d67717f095f67448d9310c7e049f7fea8dd5907afe8bd462921
SSDEEP

24576:q9gl2kNvEE7GFdGqXsShFTAkBojKLUI56eGk:46vbIGqXscAkW+h1

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
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

Processes:

resource	yara_rule
behavioral1/files/0x00280000000450b8-3.dat	family_quasar
behavioral1/memory/2140-5-0x0000000000C20000-0x0000000000F44000-memory.dmp	family_quasar

Executes dropped EXE 2 IoCs

Processes:

PORQUEPUTASYANOSIRVE.exeClient.exe

pid	Process
2140	PORQUEPUTASYANOSIRVE.exe
1720	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

Processes:

schtasks.exeschtasks.exe

pid	Process
4496	schtasks.exe
2280	schtasks.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

Processes:

7zFM.exePORQUEPUTASYANOSIRVE.exeClient.exe

description	pid	Process
Token: SeRestorePrivilege	2924	7zFM.exe
Token: 35	2924	7zFM.exe
Token: SeSecurityPrivilege	2924	7zFM.exe
Token: SeDebugPrivilege	2140	PORQUEPUTASYANOSIRVE.exe
Token: SeDebugPrivilege	1720	Client.exe

Suspicious use of FindShellTrayWindow 2 IoCs

Processes:

7zFM.exe

pid	Process
2924	7zFM.exe
2924	7zFM.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

Client.exe

pid	Process
1720	Client.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

PORQUEPUTASYANOSIRVE.exeClient.exe

description	pid	Process	procid_target
PID 2140 wrote to memory of 4496	2140	PORQUEPUTASYANOSIRVE.exe	93
PID 2140 wrote to memory of 4496	2140	PORQUEPUTASYANOSIRVE.exe	93
PID 2140 wrote to memory of 1720	2140	PORQUEPUTASYANOSIRVE.exe	95
PID 2140 wrote to memory of 1720	2140	PORQUEPUTASYANOSIRVE.exe	95
PID 1720 wrote to memory of 2280	1720	Client.exe	96
PID 1720 wrote to memory of 2280	1720	Client.exe	96

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\PORQUEPUTASYANOSIRVE.7z"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
PID:2924

C:\Users\Admin\Desktop\PORQUEPUTASYANOSIRVE.exe
"C:\Users\Admin\Desktop\PORQUEPUTASYANOSIRVE.exe"
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2140
- 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:4496
- 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:1720
- - 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:2280

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\PORQUEPUTASYANOSIRVE.exe

Filesize
3.1MB

MD5
73565f33ed4d8741291cbb30409f1727

SHA1
4d3a54b28f3ea80f884a25905e27165bdc353109

SHA256
aafe953e627f9e733e101d7211f0c9594dbdf82ec4019b2c9aa361cbc478f0de

SHA512
d897b098ddcdc94ac9177bc9a90b700c8b9a7cfafa74f729beebf74a094f76a7bd69e764711bdfedcdd231465daef16e937676e391ca2c010df03fecc863b583

Download Submit
memory/1720-11-0x000000001C1E0000-0x000000001C292000-memory.dmp

Filesize
712KB

Download
memory/1720-10-0x000000001AFB0000-0x000000001B000000-memory.dmp

Filesize
320KB

Download
memory/1720-14-0x000000001C140000-0x000000001C152000-memory.dmp

Filesize
72KB

Download
memory/1720-15-0x000000001C1A0000-0x000000001C1DC000-memory.dmp

Filesize
240KB

Download
memory/2140-4-0x00007FFA33243000-0x00007FFA33245000-memory.dmp

Filesize
8KB

Download
memory/2140-5-0x0000000000C20000-0x0000000000F44000-memory.dmp

Filesize
3.1MB

Download
memory/2140-6-0x00007FFA33240000-0x00007FFA33D02000-memory.dmp

Filesize
10.8MB

Download
memory/2140-9-0x00007FFA33240000-0x00007FFA33D02000-memory.dmp

Filesize
10.8MB

Download