quasar | a9b4c1d130aaadee170d4def45d3b73e26847c38e1ad6bbb05589953c2016bdb

Analysis

max time kernel
149s
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
16-12-2024 06:50

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General

Target

Client-built.exe
Size

3.2MB
MD5

12bae2d19de4df6c0325e70c73b5224f
SHA1

e5ca184f49b3cbfb817315dff623aefe3c44fe08
SHA256

a9b4c1d130aaadee170d4def45d3b73e26847c38e1ad6bbb05589953c2016bdb
SHA512

2666bb29e7f676e2a9e5a2e4bb610ad589ecb0a1473ad1ec1154488fd1a3460e0b0ed7f9f4717c56353e0d016fef19964784fd74a2786624adb125126139bce2
SSDEEP

49152:CvEt62XlaSFNWPjljiFa2RoUYIPGF4qkCeLoGpBeZTHHB72eh2NTc:CvY62XlaSFNWPjljiFXRoUYIP4430

Score

10^/10

quasar microsoft spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

microsoft

193.161.193.99:25170

Mutex

06cb3c8b-d800-42d6-af01-12c4e1f138b0

Attributes

encryption_key
95C77D90C8A49F5740548C8A0A430C41732B639C
install_name
runtime.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Runtime

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/4880-1-0x00000000006F0000-0x0000000000A24000-memory.dmp	family_quasar
behavioral2/files/0x000c000000023b9d-5.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
3276	runtime.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File created	C:\Windows\system32\runtime.exe	Client-built.exe
File opened for modification	C:\Windows\system32\runtime.exe	Client-built.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
2660	schtasks.exe
4524	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4880	Client-built.exe
Token: SeDebugPrivilege	3276	runtime.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3276	runtime.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4880 wrote to memory of 4524	4880	Client-built.exe	82
PID 4880 wrote to memory of 4524	4880	Client-built.exe	82
PID 4880 wrote to memory of 3276	4880	Client-built.exe	84
PID 4880 wrote to memory of 3276	4880	Client-built.exe	84
PID 3276 wrote to memory of 2660	3276	runtime.exe	85
PID 3276 wrote to memory of 2660	3276	runtime.exe	85

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\Client-built.exe
"C:\Users\Admin\AppData\Local\Temp\Client-built.exe"
1⤵
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4880
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "Runtime" /sc ONLOGON /tr "C:\Windows\system32\runtime.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:4524
- C:\Windows\system32\runtime.exe
  "C:\Windows\system32\runtime.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:3276
- - C:\Windows\system32\schtasks.exe
    "schtasks" /create /tn "Runtime" /sc ONLOGON /tr "C:\Windows\system32\runtime.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2660

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:\Windows\System32\runtime.exe

Filesize
3.2MB

MD5
12bae2d19de4df6c0325e70c73b5224f

SHA1
e5ca184f49b3cbfb817315dff623aefe3c44fe08

SHA256
a9b4c1d130aaadee170d4def45d3b73e26847c38e1ad6bbb05589953c2016bdb

SHA512
2666bb29e7f676e2a9e5a2e4bb610ad589ecb0a1473ad1ec1154488fd1a3460e0b0ed7f9f4717c56353e0d016fef19964784fd74a2786624adb125126139bce2

Download Submit
memory/3276-9-0x00007FFCED2A0000-0x00007FFCEDD61000-memory.dmp

Filesize
10.8MB

Download
memory/3276-10-0x00007FFCED2A0000-0x00007FFCEDD61000-memory.dmp

Filesize
10.8MB

Download
memory/3276-11-0x000000001CF80000-0x000000001CFD0000-memory.dmp

Filesize
320KB

Download
memory/3276-12-0x000000001D090000-0x000000001D142000-memory.dmp

Filesize
712KB

Download
memory/3276-13-0x00007FFCED2A0000-0x00007FFCEDD61000-memory.dmp

Filesize
10.8MB

Download
memory/4880-0-0x00007FFCED2A3000-0x00007FFCED2A5000-memory.dmp

Filesize
8KB

Download
memory/4880-1-0x00000000006F0000-0x0000000000A24000-memory.dmp

Filesize
3.2MB

Download
memory/4880-2-0x00007FFCED2A0000-0x00007FFCEDD61000-memory.dmp

Filesize
10.8MB

Download
memory/4880-8-0x00007FFCED2A0000-0x00007FFCEDD61000-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