quasar | 46ca3722c1851d6a68aea45c19e64a4c735eb236403e172422d02bbff4e35cca

Analysis

max time kernel
103s
max time network
177s
platform
windows10-ltsc 2021_x64
resource
win10ltsc2021-20241023-en
resource tags

arch:x64arch:x86image:win10ltsc2021-20241023-enlocale:en-usos:windows10-ltsc 2021-x64system
submitted
01-12-2024 09:30

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General

Target

Top4smm Dinero Ilimitado.exe
Size

3.2MB
MD5

74474ce327c2d8e2b74eba981a7e3249
SHA1

48544696b4ce7c96559a791efb58ec7481092454
SHA256

46ca3722c1851d6a68aea45c19e64a4c735eb236403e172422d02bbff4e35cca
SHA512

0c5b75305b19e0dcaacb9f3df556cdb136c002a5732625cb096fdd0a69e4a6a4b96507bb2948b847e2726d98e424462a237e0c0cecb1210c45cef52c7c1accc1
SSDEEP

49152:HvSI22SsaNYfdPBldt698dBcjHuDODSCUvJxioGdaTHHB72eh2NT:Hv/22SsaNYfdPBldt6+dBcjH6CF

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

Processes:

resource	yara_rule
behavioral1/memory/4988-1-0x0000000000800000-0x0000000000B32000-memory.dmp	family_quasar
behavioral1/files/0x00280000000450b8-3.dat	family_quasar

Executes dropped EXE 1 IoCs

Processes:

WindowsUpdate.exe

pid	Process
3736	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

Processes:

schtasks.exeschtasks.exe

pid	Process
320	schtasks.exe
672	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

Top4smm Dinero Ilimitado.exeWindowsUpdate.exe

description	pid	Process
Token: SeDebugPrivilege	4988	Top4smm Dinero Ilimitado.exe
Token: SeDebugPrivilege	3736	WindowsUpdate.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

WindowsUpdate.exe

pid	Process
3736	WindowsUpdate.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

Top4smm Dinero Ilimitado.exeWindowsUpdate.exe

description	pid	Process	procid_target
PID 4988 wrote to memory of 320	4988	Top4smm Dinero Ilimitado.exe	80
PID 4988 wrote to memory of 320	4988	Top4smm Dinero Ilimitado.exe	80
PID 4988 wrote to memory of 3736	4988	Top4smm Dinero Ilimitado.exe	82
PID 4988 wrote to memory of 3736	4988	Top4smm Dinero Ilimitado.exe	82
PID 3736 wrote to memory of 672	3736	WindowsUpdate.exe	85
PID 3736 wrote to memory of 672	3736	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\Top4smm Dinero Ilimitado.exe
"C:\Users\Admin\AppData\Local\Temp\Top4smm Dinero Ilimitado.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4988
- 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:320
- 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:3736
- - 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:672

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\WindowsUpdate.exe

Filesize
3.2MB

MD5
74474ce327c2d8e2b74eba981a7e3249

SHA1
48544696b4ce7c96559a791efb58ec7481092454

SHA256
46ca3722c1851d6a68aea45c19e64a4c735eb236403e172422d02bbff4e35cca

SHA512
0c5b75305b19e0dcaacb9f3df556cdb136c002a5732625cb096fdd0a69e4a6a4b96507bb2948b847e2726d98e424462a237e0c0cecb1210c45cef52c7c1accc1

Download Submit
memory/3736-7-0x00007FF89EEB0000-0x00007FF89F972000-memory.dmp

Filesize
10.8MB

Download
memory/3736-5-0x00007FF89EEB0000-0x00007FF89F972000-memory.dmp

Filesize
10.8MB

Download
memory/3736-8-0x000000001C160000-0x000000001C1B0000-memory.dmp

Filesize
320KB

Download
memory/3736-9-0x000000001C270000-0x000000001C322000-memory.dmp

Filesize
712KB

Download
memory/3736-12-0x000000001C200000-0x000000001C212000-memory.dmp

Filesize
72KB

Download
memory/3736-13-0x000000001CE70000-0x000000001CEAC000-memory.dmp

Filesize
240KB

Download
memory/3736-14-0x00007FF89EEB0000-0x00007FF89F972000-memory.dmp

Filesize
10.8MB

Download
memory/3736-15-0x000000001E000000-0x000000001E528000-memory.dmp

Filesize
5.2MB

Download
memory/4988-2-0x00007FF89EEB0000-0x00007FF89F972000-memory.dmp

Filesize
10.8MB

Download
memory/4988-1-0x0000000000800000-0x0000000000B32000-memory.dmp

Filesize
3.2MB

Download
memory/4988-6-0x00007FF89EEB0000-0x00007FF89F972000-memory.dmp

Filesize
10.8MB

Download
memory/4988-0-0x00007FF89EEB3000-0x00007FF89EEB5000-memory.dmp

Filesize
8KB

Download