quasar | a4b343420149aabd8ef8af687bcb7b252af476c4c8fdad177c3cf5d65ccf912e

Analysis

max time kernel
101s
max time network
141s
platform
windows10-ltsc 2021_x64
resource
win10ltsc2021-20241023-en
resource tags

arch:x64arch:x86image:win10ltsc2021-20241023-enlocale:en-usos:windows10-ltsc 2021-x64system
submitted
06-11-2024 20:15

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General

Target

Lo último.exe
Size

3.1MB
MD5

afb2e5dad453db7cf42339f806f37532
SHA1

90fa9e8b4ed9d086d67b9f86dc57151db1637ca9
SHA256

a4b343420149aabd8ef8af687bcb7b252af476c4c8fdad177c3cf5d65ccf912e
SHA512

72c3474f11a90bd904957030d019611c460dfa66524e0113b40b18a4ae0f3d81d56ae125fa2f247b266e71a11fcaad5884987036563e9464dc2e973877f79f3f
SSDEEP

49152:Hv+lL26AaNeWgPhlmVqvMQ7XSKwkamEoXdl3THHB72eh2NT:HvuL26AaNeWgPhlmVqkQ7XSK9af8

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

Ingrid78-20703.portmap.host:20703

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

resource	yara_rule
behavioral1/memory/2060-1-0x0000000000AF0000-0x0000000000E14000-memory.dmp	family_quasar
behavioral1/files/0x00280000000450a4-3.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
356	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

pid	Process
2052	schtasks.exe
1732	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2060	Lo último.exe
Token: SeDebugPrivilege	356	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
356	Client.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2060 wrote to memory of 2052	2060	Lo último.exe	83
PID 2060 wrote to memory of 2052	2060	Lo último.exe	83
PID 2060 wrote to memory of 356	2060	Lo último.exe	85
PID 2060 wrote to memory of 356	2060	Lo último.exe	85
PID 356 wrote to memory of 1732	356	Client.exe	86
PID 356 wrote to memory of 1732	356	Client.exe	86

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\Lo último.exe
"C:\Users\Admin\AppData\Local\Temp\Lo último.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2060
- 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:2052
- 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:356
- - 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:1732

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\Client.exe

Filesize
3.1MB

MD5
afb2e5dad453db7cf42339f806f37532

SHA1
90fa9e8b4ed9d086d67b9f86dc57151db1637ca9

SHA256
a4b343420149aabd8ef8af687bcb7b252af476c4c8fdad177c3cf5d65ccf912e

SHA512
72c3474f11a90bd904957030d019611c460dfa66524e0113b40b18a4ae0f3d81d56ae125fa2f247b266e71a11fcaad5884987036563e9464dc2e973877f79f3f

Download Submit
memory/356-6-0x00007FFEC6C40000-0x00007FFEC7702000-memory.dmp

Filesize
10.8MB

Download
memory/356-7-0x00007FFEC6C40000-0x00007FFEC7702000-memory.dmp

Filesize
10.8MB

Download
memory/356-8-0x000000001CBF0000-0x000000001CC40000-memory.dmp

Filesize
320KB

Download
memory/356-9-0x000000001CD00000-0x000000001CDB2000-memory.dmp

Filesize
712KB

Download
memory/356-12-0x000000001CC40000-0x000000001CC52000-memory.dmp

Filesize
72KB

Download
memory/356-13-0x000000001CCA0000-0x000000001CCDC000-memory.dmp

Filesize
240KB

Download
memory/356-14-0x00007FFEC6C40000-0x00007FFEC7702000-memory.dmp

Filesize
10.8MB

Download
memory/2060-0-0x00007FFEC6C43000-0x00007FFEC6C45000-memory.dmp

Filesize
8KB

Download
memory/2060-1-0x0000000000AF0000-0x0000000000E14000-memory.dmp

Filesize
3.1MB

Download
memory/2060-2-0x00007FFEC6C40000-0x00007FFEC7702000-memory.dmp

Filesize
10.8MB

Download
memory/2060-5-0x00007FFEC6C40000-0x00007FFEC7702000-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