quasar | b3c40f057551db10381b772c0bd45dce4f4ffc8eeba424a985f8716e595629e0

Analysis

max time kernel
1797s
max time network
1802s
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 23:25

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General

Target

hmm.exe
Size

3.1MB
MD5

ee9ed61568e4fce02ab542c67cfd1b2e
SHA1

4df048ac26de94335d7dd6401afb0e6c9c56779c
SHA256

b3c40f057551db10381b772c0bd45dce4f4ffc8eeba424a985f8716e595629e0
SHA512

83dd4d2263ce3e43e10ff79822208a66653cdcf0a84d46adca966348be6a9683e992a9f1abd82c95548cdbb02f3d1b0b8e6e4f7fff301c614fba517875c372d1
SSDEEP

49152:3vyI22SsaNYfdPBldt698dBcjHuHDLoG8O+THHB72eh2NT:3vf22SsaNYfdPBldt6+dBcjHuHPh

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
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

Processes:

resource	yara_rule
behavioral1/memory/2060-1-0x0000000000870000-0x0000000000B94000-memory.dmp	family_quasar
C:\Users\Admin\AppData\Roaming\SubDir\Client.exe	family_quasar

Executes dropped EXE 1 IoCs

Processes:

Client.exe

pid process

2464 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

Processes:

schtasks.exeschtasks.exe

pid process

3796 schtasks.exe
4656 schtasks.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

hmm.exeClient.exe

description pid process

Token: SeDebugPrivilege 2060 hmm.exe
Token: SeDebugPrivilege 2464 Client.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

Client.exe

pid process

2464 Client.exe

pid	process
2464	Client.exe

pid	process
3796	schtasks.exe
4656	schtasks.exe

description	pid	process
Token: SeDebugPrivilege	2060	hmm.exe
Token: SeDebugPrivilege	2464	Client.exe

pid	process
2464	Client.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

hmm.exeClient.exe

description	pid	process	target process
PID 2060 wrote to memory of 3796	2060	hmm.exe	schtasks.exe
PID 2060 wrote to memory of 3796	2060	hmm.exe	schtasks.exe
PID 2060 wrote to memory of 2464	2060	hmm.exe	Client.exe
PID 2060 wrote to memory of 2464	2060	hmm.exe	Client.exe
PID 2464 wrote to memory of 4656	2464	Client.exe	schtasks.exe
PID 2464 wrote to memory of 4656	2464	Client.exe	schtasks.exe

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\hmm.exe
"C:\Users\Admin\AppData\Local\Temp\hmm.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:3796
- 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:2464
- - 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:4656

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
ee9ed61568e4fce02ab542c67cfd1b2e

SHA1
4df048ac26de94335d7dd6401afb0e6c9c56779c

SHA256
b3c40f057551db10381b772c0bd45dce4f4ffc8eeba424a985f8716e595629e0

SHA512
83dd4d2263ce3e43e10ff79822208a66653cdcf0a84d46adca966348be6a9683e992a9f1abd82c95548cdbb02f3d1b0b8e6e4f7fff301c614fba517875c372d1

Download Submit
memory/2060-0-0x00007FFCA1CE3000-0x00007FFCA1CE5000-memory.dmp

Filesize
8KB

Download
memory/2060-1-0x0000000000870000-0x0000000000B94000-memory.dmp

Filesize
3.1MB

Download
memory/2060-2-0x00007FFCA1CE0000-0x00007FFCA27A2000-memory.dmp

Filesize
10.8MB

Download
memory/2060-6-0x00007FFCA1CE0000-0x00007FFCA27A2000-memory.dmp

Filesize
10.8MB

Download
memory/2464-5-0x00007FFCA1CE0000-0x00007FFCA27A2000-memory.dmp

Filesize
10.8MB

Download
memory/2464-7-0x00007FFCA1CE0000-0x00007FFCA27A2000-memory.dmp

Filesize
10.8MB

Download
memory/2464-8-0x000000001CE20000-0x000000001CE70000-memory.dmp

Filesize
320KB

Download
memory/2464-9-0x000000001CF30000-0x000000001CFE2000-memory.dmp

Filesize
712KB

Download
memory/2464-10-0x00007FFCA1CE0000-0x00007FFCA27A2000-memory.dmp

Filesize
10.8MB

Download