quasar | 9a29bddf402b54b0f23fed218dbc1b13186db7688930ec8dcf627aae635ccf79

Analysis

max time kernel
149s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240704-en
resource tags

arch:x64arch:x86image:win10v2004-20240704-enlocale:en-usos:windows10-2004-x64system
submitted
05-07-2024 01:36

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General

Target

xRAT v2.0/Client-built.exe
Size

294KB
MD5

04c30859516960ad61fcda864c16ea84
SHA1

c5893f23d34826eb061cbff517843793f13b0e6a
SHA256

e4fcf1f6b71043e7c7c32f6954a0a1972696fa1bb9b6543ead14e85626890a11
SHA512

ef58cd9756f6d89b9752a6a233e388bfca9d1cb707af641ef95f04181b142e260c4c5c8e034270de35cd88cf569d81cebbcdc5af3749840436d006859cc6230c
SSDEEP

3072:7o7lYJHuSHgB24g54PzOOqJYGk6/uGDB0C6Z3pMJCv5Aa5OZw1Rvbq/ZU1os8rG1:U7lRw4vB890C6ZwLORvbq/uv8M

Score

10^/10

quasar persistence spyware trojan

Malware Config

Signatures

Quasar RAT
Quasar is an open source Remote Access Tool.
trojan spyware quasar
Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.

Query Registry
T1012

System Information Discovery
T1082

Processes:

Client-built.exe

description ioc process

Key value queried \REGISTRY\USER\S-1-5-21-3642458265-1901903390-453309326-1000\Control Panel\International\Geo\Nation Client-built.exe
Executes dropped EXE 1 IoCs

Processes:

explorer.exe

pid process

8 explorer.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3642458265-1901903390-453309326-1000\Control Panel\International\Geo\Nation	Client-built.exe

pid	process
8	explorer.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

Client-built.exeexplorer.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bubvhcvyuicygc_idctdtydyiodc = "C:\\Users\\Admin\\AppData\\Roaming\\windows\\explorer.exe"	Client-built.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\bubvhcvyuicygc_idctdtydyiodc = "C:\\Users\\Admin\\AppData\\Roaming\\windows\\explorer.exe"	explorer.exe

Looks up external IP address via web service 3 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.

Processes:

flow ioc

16 api.ipify.org
6 api.ipify.org
9 api.ipify.org
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

Client-built.exeexplorer.exe

description pid process

Token: SeDebugPrivilege 624 Client-built.exe
Token: SeDebugPrivilege 8 explorer.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

explorer.exe

pid process

8 explorer.exe
Suspicious use of WriteProcessMemory 2 IoCs

Processes:

Client-built.exe

description pid process target process

PID 624 wrote to memory of 8 624 Client-built.exe explorer.exe
PID 624 wrote to memory of 8 624 Client-built.exe explorer.exe

flow	ioc
16	api.ipify.org
6	api.ipify.org
9	api.ipify.org

description	pid	process
Token: SeDebugPrivilege	624	Client-built.exe
Token: SeDebugPrivilege	8	explorer.exe

pid	process
8	explorer.exe

description	pid	process	target process
PID 624 wrote to memory of 8	624	Client-built.exe	explorer.exe
PID 624 wrote to memory of 8	624	Client-built.exe	explorer.exe

C:\Users\Admin\AppData\Local\Temp\xRAT v2.0\Client-built.exe
"C:\Users\Admin\AppData\Local\Temp\xRAT v2.0\Client-built.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:624

C:\Users\Admin\AppData\Roaming\windows\explorer.exe
"C:\Users\Admin\AppData\Roaming\windows\explorer.exe"
2⤵
- Executes dropped EXE
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
PID:8

Network

MITRE ATT&CK Matrix ATT&CK v13

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Roaming\windows\explorer.exe
Filesize
294KB

MD5
04c30859516960ad61fcda864c16ea84

SHA1
c5893f23d34826eb061cbff517843793f13b0e6a

SHA256
e4fcf1f6b71043e7c7c32f6954a0a1972696fa1bb9b6543ead14e85626890a11

SHA512
ef58cd9756f6d89b9752a6a233e388bfca9d1cb707af641ef95f04181b142e260c4c5c8e034270de35cd88cf569d81cebbcdc5af3749840436d006859cc6230c

Download Submit
memory/8-24-0x00007FF9BCE90000-0x00007FF9BD831000-memory.dmp

Filesize
9.6MB

Download
memory/8-22-0x00007FF9BCE90000-0x00007FF9BD831000-memory.dmp

Filesize
9.6MB

Download
memory/8-29-0x00007FF9BCE90000-0x00007FF9BD831000-memory.dmp

Filesize
9.6MB

Download
memory/8-28-0x00007FF9BCE90000-0x00007FF9BD831000-memory.dmp

Filesize
9.6MB

Download
memory/8-20-0x00007FF9BCE90000-0x00007FF9BD831000-memory.dmp

Filesize
9.6MB

Download
memory/8-26-0x000000001CBC0000-0x000000001CBC8000-memory.dmp

Filesize
32KB

Download
memory/8-27-0x00007FF9BCE90000-0x00007FF9BD831000-memory.dmp

Filesize
9.6MB

Download
memory/8-23-0x00007FF9BCE90000-0x00007FF9BD831000-memory.dmp

Filesize
9.6MB

Download
memory/624-21-0x00007FF9BCE90000-0x00007FF9BD831000-memory.dmp

Filesize
9.6MB

Download
memory/624-5-0x000000001BBB0000-0x000000001BC12000-memory.dmp

Filesize
392KB

Download
memory/624-1-0x00007FF9BCE90000-0x00007FF9BD831000-memory.dmp

Filesize
9.6MB

Download
memory/624-0-0x00007FF9BD145000-0x00007FF9BD146000-memory.dmp

Filesize
4KB

Download
memory/624-2-0x000000001B530000-0x000000001B9FE000-memory.dmp

Filesize
4.8MB

Download
memory/624-6-0x00007FF9BCE90000-0x00007FF9BD831000-memory.dmp

Filesize
9.6MB

Download
memory/624-4-0x00007FF9BCE90000-0x00007FF9BD831000-memory.dmp

Filesize
9.6MB

Download
memory/624-3-0x000000001BAA0000-0x000000001BB3C000-memory.dmp

Filesize
624KB

Download