quasar | 3581567130d8c7081fcb2f9c51e066487c7da1d62833169817725ae57874a243

Analysis

max time kernel
145s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
13-12-2024 06:55

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General

Target

IMVUdineroilimitado.exe
Size

3.3MB
MD5

a6b8a25d0eeac0fe978cc16a1e377e37
SHA1

dae6ed3a24af41e4247872f718b0e1bb0dcc7bff
SHA256

3581567130d8c7081fcb2f9c51e066487c7da1d62833169817725ae57874a243
SHA512

7dd56e27b1f112df4f4ca6e6f9846848d50496d78cdfcc913f0179c39a21c57b0a04bffabe9c1d1c85fcfda79e2ec0bd55aa38537e8325b7073970d6ede59713
SSDEEP

98304:xv/22SsaNYfdPBldt6+dBcjH90Rm6elp:1w7jYSl

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
behavioral2/memory/3616-1-0x0000000000870000-0x0000000000BC2000-memory.dmp	family_quasar
behavioral2/files/0x0008000000023bc3-6.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
1628	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
1152	schtasks.exe
1588	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3616	IMVUdineroilimitado.exe
Token: SeDebugPrivilege	1628	WindowsUpdate.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1628	WindowsUpdate.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3616 wrote to memory of 1152	3616	IMVUdineroilimitado.exe	84
PID 3616 wrote to memory of 1152	3616	IMVUdineroilimitado.exe	84
PID 3616 wrote to memory of 1628	3616	IMVUdineroilimitado.exe	86
PID 3616 wrote to memory of 1628	3616	IMVUdineroilimitado.exe	86
PID 1628 wrote to memory of 1588	1628	WindowsUpdate.exe	87
PID 1628 wrote to memory of 1588	1628	WindowsUpdate.exe	87

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\IMVUdineroilimitado.exe
"C:\Users\Admin\AppData\Local\Temp\IMVUdineroilimitado.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3616
- 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:1152
- 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:1628
- - 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:1588

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
3.3MB

MD5
a6b8a25d0eeac0fe978cc16a1e377e37

SHA1
dae6ed3a24af41e4247872f718b0e1bb0dcc7bff

SHA256
3581567130d8c7081fcb2f9c51e066487c7da1d62833169817725ae57874a243

SHA512
7dd56e27b1f112df4f4ca6e6f9846848d50496d78cdfcc913f0179c39a21c57b0a04bffabe9c1d1c85fcfda79e2ec0bd55aa38537e8325b7073970d6ede59713

Download Submit
memory/1628-9-0x00007FFA367A0000-0x00007FFA37261000-memory.dmp

Filesize
10.8MB

Download
memory/1628-10-0x00007FFA367A0000-0x00007FFA37261000-memory.dmp

Filesize
10.8MB

Download
memory/1628-11-0x000000001B000000-0x000000001B050000-memory.dmp

Filesize
320KB

Download
memory/1628-12-0x000000001D0C0000-0x000000001D172000-memory.dmp

Filesize
712KB

Download
memory/1628-14-0x00007FFA367A0000-0x00007FFA37261000-memory.dmp

Filesize
10.8MB

Download
memory/3616-0-0x00007FFA367A3000-0x00007FFA367A5000-memory.dmp

Filesize
8KB

Download
memory/3616-1-0x0000000000870000-0x0000000000BC2000-memory.dmp

Filesize
3.3MB

Download
memory/3616-2-0x00007FFA367A0000-0x00007FFA37261000-memory.dmp

Filesize
10.8MB

Download
memory/3616-13-0x00007FFA367A0000-0x00007FFA37261000-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