quasar | cd26a82269f7a8d01e7481ed383de80ff49151e7d78f92019160bbe5c0060cc2

Analysis

max time kernel
102s
max time network
106s
platform
windows10-ltsc 2021_x64
resource
win10ltsc2021-20241023-en
resource tags

arch:x64arch:x86image:win10ltsc2021-20241023-enlocale:en-usos:windows10-ltsc 2021-x64system
submitted
09/11/2024, 00:44

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General

Target

iyry5trrt7.exe
Size

3.1MB
MD5

2be928c12ef47547beb9bfd3201dcd2a
SHA1

56fec6e1f1b7e5842ce82b2e59c30b009d3519dd
SHA256

cd26a82269f7a8d01e7481ed383de80ff49151e7d78f92019160bbe5c0060cc2
SHA512

45d8b634b94e748231cdd28f040f27c7d3d2d3c2015cc64fa43263b4b2563fcc860a07bd3b0d0046f503022680b16f79d396c31e4037b405e7b283df2a13fc19
SSDEEP

49152:KvyI22SsaNYfdPBldt698dBcjHtORJ6hbR3LoGdPTHHB72eh2NT:Kvf22SsaNYfdPBldt6+dBcjHtORJ6D

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

190.104.116.8:4782

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/3360-1-0x0000000000680000-0x00000000009A4000-memory.dmp	family_quasar
behavioral1/files/0x0026000000045178-3.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
4836	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
3404	schtasks.exe
1212	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3360	iyry5trrt7.exe
Token: SeDebugPrivilege	4836	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4836	Client.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3360 wrote to memory of 3404	3360	iyry5trrt7.exe	82
PID 3360 wrote to memory of 3404	3360	iyry5trrt7.exe	82
PID 3360 wrote to memory of 4836	3360	iyry5trrt7.exe	84
PID 3360 wrote to memory of 4836	3360	iyry5trrt7.exe	84
PID 4836 wrote to memory of 1212	4836	Client.exe	87
PID 4836 wrote to memory of 1212	4836	Client.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\iyry5trrt7.exe
"C:\Users\Admin\AppData\Local\Temp\iyry5trrt7.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3360
- 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:3404
- 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:4836
- - 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:1212

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
2be928c12ef47547beb9bfd3201dcd2a

SHA1
56fec6e1f1b7e5842ce82b2e59c30b009d3519dd

SHA256
cd26a82269f7a8d01e7481ed383de80ff49151e7d78f92019160bbe5c0060cc2

SHA512
45d8b634b94e748231cdd28f040f27c7d3d2d3c2015cc64fa43263b4b2563fcc860a07bd3b0d0046f503022680b16f79d396c31e4037b405e7b283df2a13fc19

Download Submit
memory/3360-0-0x00007FFE060D3000-0x00007FFE060D5000-memory.dmp

Filesize
8KB

Download
memory/3360-1-0x0000000000680000-0x00000000009A4000-memory.dmp

Filesize
3.1MB

Download
memory/3360-2-0x00007FFE060D0000-0x00007FFE06B92000-memory.dmp

Filesize
10.8MB

Download
memory/3360-5-0x00007FFE060D0000-0x00007FFE06B92000-memory.dmp

Filesize
10.8MB

Download
memory/4836-6-0x00007FFE060D0000-0x00007FFE06B92000-memory.dmp

Filesize
10.8MB

Download
memory/4836-7-0x00007FFE060D0000-0x00007FFE06B92000-memory.dmp

Filesize
10.8MB

Download
memory/4836-8-0x000000001D070000-0x000000001D0C0000-memory.dmp

Filesize
320KB

Download
memory/4836-9-0x000000001D180000-0x000000001D232000-memory.dmp

Filesize
712KB

Download
memory/4836-10-0x00007FFE060D0000-0x00007FFE06B92000-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