quasar | 61677a551b63f4edf86c28ffc7bcc02cedc66957709a8693d368dc61c0c393fc

Analysis

max time kernel
4s
max time network
5s
platform
windows11-21h2_x64
resource
win11-20241007-en
resource tags

arch:x64arch:x86image:win11-20241007-enlocale:en-usos:windows11-21h2-x64system
submitted
19/12/2024, 17:56

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General

Target

image/image.exe
Size

1.5MB
MD5

bbb68cbd54b244a4248bd6f0679248cd
SHA1

8f5b4de5be86fb25b771cb6d77d7c733d61425fe
SHA256

bbd6a97147359f874c0d8cad57adaf14508890a1fdeb7a71b94a2957a81786d5
SHA512

99bc221b3134b37f42a7879382f88367ba365689620aebb7f64e5e11b136885761f7dd1801fafe57b94418af38020fc12cc7df0a9ef6419ea0c3e2f78127471d
SSDEEP

24576:luDXTIGaPhEYzUzA0KugmRyyi8xDjtF24u0+I3dlB9wgTwB/aqBLIXvFpNvKcYjg:4Djlabwz9Am4FijqfEdlB9dTwB/aqBED

Score

10^/10

quasar kurban spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

kurban

am2uk98.localto.net:1717

Mutex

29f4cb4d-448a-4713-bbeb-b28f62c6efe4

Attributes

encryption_key
5D6738D4B8B3079082A977FDF5631438E56AC0F9
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
quasar
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/files/0x001d00000002aae0-6.dat	family_quasar
behavioral1/memory/2352-15-0x00000000007B0000-0x0000000000AD4000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
2352	Client-built.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

pid	Process
1672	schtasks.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2352	Client-built.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
2352	Client-built.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
2352	Client-built.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1864 wrote to memory of 2352	1864	image.exe	78
PID 1864 wrote to memory of 2352	1864	image.exe	78
PID 2352 wrote to memory of 1672	2352	Client-built.exe	81
PID 2352 wrote to memory of 1672	2352	Client-built.exe	81

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\image\image.exe
"C:\Users\Admin\AppData\Local\Temp\image\image.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1864
- C:\Users\Admin\AppData\Local\Temp\RarSFX0\Client-built.exe
  "C:\Users\Admin\AppData\Local\Temp\RarSFX0\Client-built.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  - Suspicious use of WriteProcessMemory
  PID:2352
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "quasar" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:1672

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

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\RarSFX0\Client-built.exe

Filesize
3.1MB

MD5
709db99b201db278f9dd2375efd249fb

SHA1
bcd7a699982f840f90e38543aff9dcad5dc35a75

SHA256
2c4a5c66e2c741be6d4211f46c4c03ffc1e7500326924c2d6eb3e7dc5ae51362

SHA512
18ef7c998e9a229e30a34ec6d1800c572292faa2845b3187b63ca8e72caed03b21f88f000ced25ad2d0e0bd19ad0b554cf62749096cab414a70e06d9c817a4ba

Download Submit
memory/2352-14-0x00007FFC55473000-0x00007FFC55475000-memory.dmp

Filesize
8KB

Download
memory/2352-15-0x00000000007B0000-0x0000000000AD4000-memory.dmp

Filesize
3.1MB

Download
memory/2352-16-0x00007FFC55470000-0x00007FFC55F32000-memory.dmp

Filesize
10.8MB

Download
memory/2352-17-0x000000001C230000-0x000000001C280000-memory.dmp

Filesize
320KB

Download
memory/2352-18-0x000000001C340000-0x000000001C3F2000-memory.dmp

Filesize
712KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads