quasar | afaf1fafdbbd222021f2d6dc870e4026866a2be055654207be312d6d9cbf3bf4

Analysis

max time kernel
125s
max time network
136s
platform
windows7_x64
resource
win7-20240611-en
resource tags

arch:x64arch:x86image:win7-20240611-enlocale:en-usos:windows7-x64system
submitted
30-06-2024 16:10

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General

Target

Client-built (1).exe
Size

3.1MB
MD5

acae78b76f4b990b86e2d2d5edfbb6fe
SHA1

0407bc802c64787ffd2baf35f6ef6c186e88d1dc
SHA256

afaf1fafdbbd222021f2d6dc870e4026866a2be055654207be312d6d9cbf3bf4
SHA512

8ff3124fa36c76ee7da622cf6faa6e992369dd6211e9808896afb32b677dadbbf65ed36748c8b7edfd0d01a706b3e38e293053f10e2d983017061f82fc426ee3
SSDEEP

49152:SvnI22SsaNYfdPBldt698dBcjHBuRJ6dbR3LoGdKITHHB72eh2NT:SvI22SsaNYfdPBldt6+dBcjHBuRJ6v6

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

192.168.1.150:4782

Mutex

adc301f6-35ca-4636-b286-ad2aef63f877

Attributes

encryption_key
54B7AB1A151267275EF24D335CE7E3B6ABDDC53E
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Microsoft Launcher Task Manager
subdirectory
SubDir

Signatures

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

Quasar payload 3 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1176-1-0x0000000000030000-0x0000000000354000-memory.dmp	family_quasar
C:\Users\Admin\AppData\Roaming\SubDir\Client.exe	family_quasar
behavioral1/memory/1328-9-0x0000000000110000-0x0000000000434000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

Processes:

Client.exe

pid process

1328 Client.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 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

1364 schtasks.exe
2764 schtasks.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

Client-built (1).exeClient.exe

description pid process

Token: SeDebugPrivilege 1176 Client-built (1).exe
Token: SeDebugPrivilege 1328 Client.exe
Suspicious use of FindShellTrayWindow 1 IoCs

Processes:

Client.exe

pid process

1328 Client.exe
Suspicious use of SendNotifyMessage 1 IoCs

Processes:

Client.exe

pid process

1328 Client.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

Client.exe

pid process

1328 Client.exe

pid	process
1328	Client.exe

pid	process
1364	schtasks.exe
2764	schtasks.exe

description	pid	process
Token: SeDebugPrivilege	1176	Client-built (1).exe
Token: SeDebugPrivilege	1328	Client.exe

pid	process
1328	Client.exe

pid	process
1328	Client.exe

pid	process
1328	Client.exe

Suspicious use of WriteProcessMemory 9 IoCs

Processes:

Client-built (1).exeClient.exe

description	pid	process	target process
PID 1176 wrote to memory of 1364	1176	Client-built (1).exe	schtasks.exe
PID 1176 wrote to memory of 1364	1176	Client-built (1).exe	schtasks.exe
PID 1176 wrote to memory of 1364	1176	Client-built (1).exe	schtasks.exe
PID 1176 wrote to memory of 1328	1176	Client-built (1).exe	Client.exe
PID 1176 wrote to memory of 1328	1176	Client-built (1).exe	Client.exe
PID 1176 wrote to memory of 1328	1176	Client-built (1).exe	Client.exe
PID 1328 wrote to memory of 2764	1328	Client.exe	schtasks.exe
PID 1328 wrote to memory of 2764	1328	Client.exe	schtasks.exe
PID 1328 wrote to memory of 2764	1328	Client.exe	schtasks.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\Client-built (1).exe
"C:\Users\Admin\AppData\Local\Temp\Client-built (1).exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1176

C:\Windows\system32\schtasks.exe
"schtasks" /create /tn "Microsoft Launcher Task Manager" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
2⤵
- Scheduled Task/Job: Scheduled Task
PID:1364

C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
"C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
2⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1328

C:\Windows\system32\schtasks.exe
"schtasks" /create /tn "Microsoft Launcher Task Manager" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
3⤵
- Scheduled Task/Job: Scheduled Task
PID:2764

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads

C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
Filesize
3.1MB

MD5
acae78b76f4b990b86e2d2d5edfbb6fe

SHA1
0407bc802c64787ffd2baf35f6ef6c186e88d1dc

SHA256
afaf1fafdbbd222021f2d6dc870e4026866a2be055654207be312d6d9cbf3bf4

SHA512
8ff3124fa36c76ee7da622cf6faa6e992369dd6211e9808896afb32b677dadbbf65ed36748c8b7edfd0d01a706b3e38e293053f10e2d983017061f82fc426ee3

Download Submit
memory/1176-0-0x000007FEF58F3000-0x000007FEF58F4000-memory.dmp

Filesize
4KB

Download
memory/1176-1-0x0000000000030000-0x0000000000354000-memory.dmp

Filesize
3.1MB

Download
memory/1176-2-0x000007FEF58F0000-0x000007FEF62DC000-memory.dmp

Filesize
9.9MB

Download
memory/1176-10-0x000007FEF58F0000-0x000007FEF62DC000-memory.dmp

Filesize
9.9MB

Download
memory/1328-8-0x000007FEF58F0000-0x000007FEF62DC000-memory.dmp

Filesize
9.9MB

Download
memory/1328-9-0x0000000000110000-0x0000000000434000-memory.dmp

Filesize
3.1MB

Download
memory/1328-11-0x000007FEF58F0000-0x000007FEF62DC000-memory.dmp

Filesize
9.9MB

Download
memory/1328-12-0x000007FEF58F0000-0x000007FEF62DC000-memory.dmp

Filesize
9.9MB

Download