quasar | a9b4c1d130aaadee170d4def45d3b73e26847c38e1ad6bbb05589953c2016bdb

Analysis

max time kernel
147s
max time network
149s
platform
windows7_x64
resource
win7-20240729-en
resource tags

arch:x64arch:x86image:win7-20240729-enlocale:en-usos:windows7-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 3 IoCs

resource	yara_rule
behavioral1/memory/2004-1-0x0000000000910000-0x0000000000C44000-memory.dmp	family_quasar
behavioral1/files/0x00080000000120fd-5.dat	family_quasar
behavioral1/memory/2104-8-0x0000000000950000-0x0000000000C84000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
2104	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
2980	schtasks.exe
2892	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2004	Client-built.exe
Token: SeDebugPrivilege	2104	runtime.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2104	runtime.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2004 wrote to memory of 2892	2004	Client-built.exe	30
PID 2004 wrote to memory of 2892	2004	Client-built.exe	30
PID 2004 wrote to memory of 2892	2004	Client-built.exe	30
PID 2004 wrote to memory of 2104	2004	Client-built.exe	32
PID 2004 wrote to memory of 2104	2004	Client-built.exe	32
PID 2004 wrote to memory of 2104	2004	Client-built.exe	32
PID 2104 wrote to memory of 2980	2104	runtime.exe	33
PID 2104 wrote to memory of 2980	2104	runtime.exe	33
PID 2104 wrote to memory of 2980	2104	runtime.exe	33

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:2004
- 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:2892
- 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:2104
- - 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:2980

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/2004-0-0x000007FEF57C3000-0x000007FEF57C4000-memory.dmp

Filesize
4KB

Download
memory/2004-1-0x0000000000910000-0x0000000000C44000-memory.dmp

Filesize
3.2MB

Download
memory/2004-2-0x000007FEF57C0000-0x000007FEF61AC000-memory.dmp

Filesize
9.9MB

Download
memory/2004-9-0x000007FEF57C0000-0x000007FEF61AC000-memory.dmp

Filesize
9.9MB

Download
memory/2104-7-0x000007FEF57C0000-0x000007FEF61AC000-memory.dmp

Filesize
9.9MB

Download
memory/2104-8-0x0000000000950000-0x0000000000C84000-memory.dmp

Filesize
3.2MB

Download
memory/2104-10-0x000007FEF57C0000-0x000007FEF61AC000-memory.dmp

Filesize
9.9MB

Download
memory/2104-11-0x000007FEF57C0000-0x000007FEF61AC000-memory.dmp

Filesize
9.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads