quasar | de49824df46b1db23b705329e2013bbe0ad49d937b5372d8dae1dd56bc4ac465

Analysis

max time kernel
128s
max time network
144s
platform
windows10-ltsc 2021_x64
resource
win10ltsc2021-20241023-en
resource tags

arch:x64arch:x86image:win10ltsc2021-20241023-enlocale:en-usos:windows10-ltsc 2021-x64system
submitted
16-11-2024 10:44

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General

Target

Huxer.exe
Size

3.1MB
MD5

9f9f5cccd13664c2dd5b286b272754b6
SHA1

38ed8cdc75fa4d46535d2816e9b0618a9239ced1
SHA256

fdac17a6a4d49e1086ea1b72f88c3861f62abffef217855ab5563a26031647bf
SHA512

e1d78c861f1780245aa0af647206a2fa40de33c96b3a5102f19e335e3f9e0873a42093409b7aba289f72b2079291af3aac4d2ff19bb83ee7acef7478f44f8006
SSDEEP

49152:Ovkt62XlaSFNWPjljiFa2RoUYIzy7RJ6TbR3LoGdZSTHHB72eh2NT:Ov462XlaSFNWPjljiFXRoUYIz2RJ6F

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

192.168.2.140:4782

Mutex

cf851edc-cac3-430f-93fc-9c6fd7bc752a

Attributes

encryption_key
91A9A127B605D8AEEBAF1FC4373FB709BB07F819
install_name
Huxer.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Key
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/1880-1-0x0000000000360000-0x0000000000684000-memory.dmp	family_quasar
behavioral1/files/0x0028000000045056-3.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
2968	Huxer.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
460	schtasks.exe
4176	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1880	Huxer.exe
Token: SeDebugPrivilege	2968	Huxer.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2968	Huxer.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1880 wrote to memory of 460	1880	Huxer.exe	82
PID 1880 wrote to memory of 460	1880	Huxer.exe	82
PID 1880 wrote to memory of 2968	1880	Huxer.exe	84
PID 1880 wrote to memory of 2968	1880	Huxer.exe	84
PID 2968 wrote to memory of 4176	2968	Huxer.exe	87
PID 2968 wrote to memory of 4176	2968	Huxer.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\Huxer.exe
"C:\Users\Admin\AppData\Local\Temp\Huxer.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1880
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "Key" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Huxer.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:460
- C:\Users\Admin\AppData\Roaming\SubDir\Huxer.exe
  "C:\Users\Admin\AppData\Roaming\SubDir\Huxer.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2968
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "Key" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Huxer.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:4176

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\Local\Microsoft\CLR_v4.0\UsageLogs\Huxer.exe.log

Filesize
1KB

MD5
b08c36ce99a5ed11891ef6fc6d8647e9

SHA1
db95af417857221948eb1882e60f98ab2914bf1d

SHA256
cc9248a177495f45ec70b86c34fc5746c56730af36ace98ac7eb365dbafda674

SHA512
07e62581eace395b0a9699d727761648103180c21155d84ea09140f9e1c9690705c419118545aa67a564334bbde32710225fe3aa92b0b4b4210cb91f0058b1ea

Download Submit
C:\Users\Admin\AppData\Roaming\SubDir\Huxer.exe

Filesize
3.1MB

MD5
9f9f5cccd13664c2dd5b286b272754b6

SHA1
38ed8cdc75fa4d46535d2816e9b0618a9239ced1

SHA256
fdac17a6a4d49e1086ea1b72f88c3861f62abffef217855ab5563a26031647bf

SHA512
e1d78c861f1780245aa0af647206a2fa40de33c96b3a5102f19e335e3f9e0873a42093409b7aba289f72b2079291af3aac4d2ff19bb83ee7acef7478f44f8006

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memory/1880-0-0x00007FFD12EE3000-0x00007FFD12EE5000-memory.dmp

Filesize
8KB

Download
memory/1880-1-0x0000000000360000-0x0000000000684000-memory.dmp

Filesize
3.1MB

Download
memory/1880-2-0x00007FFD12EE0000-0x00007FFD139A2000-memory.dmp

Filesize
10.8MB

Download
memory/1880-6-0x00007FFD12EE0000-0x00007FFD139A2000-memory.dmp

Filesize
10.8MB

Download
memory/2968-7-0x00007FFD12EE0000-0x00007FFD139A2000-memory.dmp

Filesize
10.8MB

Download
memory/2968-8-0x00007FFD12EE0000-0x00007FFD139A2000-memory.dmp

Filesize
10.8MB

Download
memory/2968-9-0x000000001C9D0000-0x000000001CA20000-memory.dmp

Filesize
320KB

Download
memory/2968-10-0x000000001CAE0000-0x000000001CB92000-memory.dmp

Filesize
712KB

Download
memory/2968-11-0x00007FFD12EE0000-0x00007FFD139A2000-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