quasar | c8e42ac2cdd0927bb4278a4cc154e8c768e8e1b0b5d5a02f04f9b9a16e6a7bf1

Analysis

max time kernel
670s
max time network
664s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
30-06-2024 15:20

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General

Target

Sp00fer.exe
Size

3.1MB
MD5

ff468df2fde593962c6cdb3bdb4614ce
SHA1

870daa4279fa830d1f555f82ad8ac49789a6e31c
SHA256

c8e42ac2cdd0927bb4278a4cc154e8c768e8e1b0b5d5a02f04f9b9a16e6a7bf1
SHA512

e3ce71ee59b3ff3cd989d73b1c59255135bbdff53d6e50695cb24445a4ba1ad3626623e3f39dc4ece1ebae9b82547555cc726e20c5b093926bf9b459c5c7ce0a
SSDEEP

49152:jvulL26AaNeWgPhlmVqvMQ7XSKDy6Rk0vGYLoG2JquTHHB72eh2NT:jveL26AaNeWgPhlmVqkQ7XSKdk4

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

pringelsy-53072.portmap.host:53072

Mutex

6dc28d35-3024-44a7-a559-f9991015fa39

Attributes

encryption_key
3107DF2D44BB6914C55BEA57D100135AB0F278DF
install_name
Client.exe
log_directory
Logs
reconnect_delay
799
startup_key
Quasar Client Startup
subdirectory
Common Files

Signatures

Quasar RAT
Quasar is an open source Remote Access Tool.
trojan spyware quasar
Quasar payload 2 IoCs

Processes:

resource yara_rule

behavioral2/memory/1428-1-0x0000000000E80000-0x00000000011A4000-memory.dmp family_quasar
C:\Program Files\Common Files\Client.exe family_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.exe

description ioc process

Key value queried \REGISTRY\USER\S-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation Client.exe
Executes dropped EXE 1 IoCs

Processes:

Client.exe

pid process

4040 Client.exe

resource	yara_rule
behavioral2/memory/1428-1-0x0000000000E80000-0x00000000011A4000-memory.dmp	family_quasar
C:\Program Files\Common Files\Client.exe	family_quasar

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation	Client.exe

pid	process
4040	Client.exe

Drops file in Program Files directory 5 IoCs

Processes:

Sp00fer.exeClient.exe

description	ioc	process
File created	C:\Program Files\Common Files\Client.exe	Sp00fer.exe
File opened for modification	C:\Program Files\Common Files\Client.exe	Sp00fer.exe
File opened for modification	C:\Program Files\Common Files	Sp00fer.exe
File opened for modification	C:\Program Files\Common Files\Client.exe	Client.exe
File opened for modification	C:\Program Files\Common Files	Client.exe

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

System Information Discovery
T1082
Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery
T1018

Processes:

PING.EXE

pid process

4888 PING.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

4092 schtasks.exe
2720 schtasks.exe
Suspicious use of AdjustPrivilegeToken 4 IoCs

Processes:

Sp00fer.exeClient.exe

description pid process

Token: SeDebugPrivilege 1428 Sp00fer.exe
Token: SeDebugPrivilege 4040 Client.exe
Token: SeShutdownPrivilege 4040 Client.exe
Token: SeCreatePagefilePrivilege 4040 Client.exe
Suspicious use of FindShellTrayWindow 4 IoCs

Processes:

Client.exe

pid process

4040 Client.exe
4040 Client.exe
4040 Client.exe
4040 Client.exe
Suspicious use of SendNotifyMessage 4 IoCs

Processes:

Client.exe

pid process

4040 Client.exe
4040 Client.exe
4040 Client.exe
4040 Client.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

Client.exe

pid process

4040 Client.exe

pid	process
4888	PING.EXE

pid	process
4092	schtasks.exe
2720	schtasks.exe

description	pid	process
Token: SeDebugPrivilege	1428	Sp00fer.exe
Token: SeDebugPrivilege	4040	Client.exe
Token: SeShutdownPrivilege	4040	Client.exe
Token: SeCreatePagefilePrivilege	4040	Client.exe

pid	process
4040	Client.exe
4040	Client.exe
4040	Client.exe
4040	Client.exe

pid	process
4040	Client.exe
4040	Client.exe
4040	Client.exe
4040	Client.exe

pid	process
4040	Client.exe

Suspicious use of WriteProcessMemory 14 IoCs

Processes:

Sp00fer.exeClient.execmd.exe

description	pid	process	target process
PID 1428 wrote to memory of 4092	1428	Sp00fer.exe	schtasks.exe
PID 1428 wrote to memory of 4092	1428	Sp00fer.exe	schtasks.exe
PID 1428 wrote to memory of 4040	1428	Sp00fer.exe	Client.exe
PID 1428 wrote to memory of 4040	1428	Sp00fer.exe	Client.exe
PID 4040 wrote to memory of 2720	4040	Client.exe	schtasks.exe
PID 4040 wrote to memory of 2720	4040	Client.exe	schtasks.exe
PID 4040 wrote to memory of 3484	4040	Client.exe	schtasks.exe
PID 4040 wrote to memory of 3484	4040	Client.exe	schtasks.exe
PID 4040 wrote to memory of 1256	4040	Client.exe	cmd.exe
PID 4040 wrote to memory of 1256	4040	Client.exe	cmd.exe
PID 1256 wrote to memory of 3168	1256	cmd.exe	chcp.com
PID 1256 wrote to memory of 3168	1256	cmd.exe	chcp.com
PID 1256 wrote to memory of 4888	1256	cmd.exe	PING.EXE
PID 1256 wrote to memory of 4888	1256	cmd.exe	PING.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\Sp00fer.exe
"C:\Users\Admin\AppData\Local\Temp\Sp00fer.exe"
1⤵
- Drops file in Program Files directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1428

C:\Windows\SYSTEM32\schtasks.exe
"schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Program Files\Common Files\Client.exe" /rl HIGHEST /f
2⤵
- Scheduled Task/Job: Scheduled Task
PID:4092

C:\Program Files\Common Files\Client.exe
"C:\Program Files\Common Files\Client.exe"
2⤵
- Checks computer location settings
- Executes dropped EXE
- Drops file in Program Files directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4040

C:\Windows\SYSTEM32\schtasks.exe
"schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Program Files\Common Files\Client.exe" /rl HIGHEST /f
3⤵
- Scheduled Task/Job: Scheduled Task
PID:2720

C:\Windows\SYSTEM32\schtasks.exe
"schtasks" /delete /tn "Quasar Client Startup" /f
3⤵
PID:3484

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\t5MDnTFXM9tz.bat" "
3⤵
- Suspicious use of WriteProcessMemory
PID:1256

C:\Windows\system32\chcp.com
chcp 65001
4⤵
PID:3168

C:\Windows\system32\PING.EXE
ping -n 10 localhost
4⤵
- Runs ping.exe
PID:4888

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads

C:\Program Files\Common Files\Client.exe
Filesize
3.1MB

MD5
ff468df2fde593962c6cdb3bdb4614ce

SHA1
870daa4279fa830d1f555f82ad8ac49789a6e31c

SHA256
c8e42ac2cdd0927bb4278a4cc154e8c768e8e1b0b5d5a02f04f9b9a16e6a7bf1

SHA512
e3ce71ee59b3ff3cd989d73b1c59255135bbdff53d6e50695cb24445a4ba1ad3626623e3f39dc4ece1ebae9b82547555cc726e20c5b093926bf9b459c5c7ce0a

Download Submit
C:\Users\Admin\AppData\Local\Temp\t5MDnTFXM9tz.bat
Filesize
203B

MD5
083a93eaefe861d0a205765c5d4e617a

SHA1
6a4c93e80b42241312986649c1ab791f6a074ac8

SHA256
e8eeacd905f9c4c92a9847f33f39c75782fdd36484f09ae8cedc97ccca626108

SHA512
f8daf1eabae7938f2a94c317fa2338522f1b70e6100bd8d1b4e5d596126f3441bb05c2f1981ed611e40f7be4b6db4fd5cc874ab70d5991f5f6e6c665c75d4e34

Download Submit
memory/1428-0-0x00007FFB52013000-0x00007FFB52015000-memory.dmp

Filesize
8KB

Download
memory/1428-1-0x0000000000E80000-0x00000000011A4000-memory.dmp

Filesize
3.1MB

Download
memory/1428-2-0x00007FFB52010000-0x00007FFB52AD1000-memory.dmp

Filesize
10.8MB

Download
memory/1428-9-0x00007FFB52010000-0x00007FFB52AD1000-memory.dmp

Filesize
10.8MB

Download
memory/4040-11-0x00007FFB52010000-0x00007FFB52AD1000-memory.dmp

Filesize
10.8MB

Download
memory/4040-12-0x000000001D510000-0x000000001D560000-memory.dmp

Filesize
320KB

Download
memory/4040-13-0x000000001D620000-0x000000001D6D2000-memory.dmp

Filesize
712KB

Download
memory/4040-14-0x00007FFB52010000-0x00007FFB52AD1000-memory.dmp

Filesize
10.8MB

Download
memory/4040-17-0x000000001D5A0000-0x000000001D5B2000-memory.dmp

Filesize
72KB

Download
memory/4040-18-0x000000001E320000-0x000000001E35C000-memory.dmp

Filesize
240KB

Download
memory/4040-10-0x00007FFB52010000-0x00007FFB52AD1000-memory.dmp

Filesize
10.8MB

Download
memory/4040-24-0x00007FFB52010000-0x00007FFB52AD1000-memory.dmp

Filesize
10.8MB

Download