quasar | 39f626850f3dbd66ff5b75f99cd531cf74e4418338ddd45d0ae20fb7ceda2b6f

Analysis

max time kernel
147s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240412-en
resource tags

arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
submitted
18/04/2024, 14:29

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General

Target
asdasd.exe
Size 3.1MB
Sample240418-rt2bjsgg81
SHA256 39f626850f3dbd66ff5b75f99cd531cf74e4418338ddd45d0ae20fb7ceda2b6f
MD5 30fdc0a0d22cca3c0b971c7928ca0e82
SHA1 517211383e5022bec91b521955832a69417f4042
SHA512 dcd9ae5e6ce11c93826b2d7b4d9acd201ac53cd41f20d815b308d2f3fd938b3774ea6d64f9f13ce159238ddbead7e8e126d514fe85af0da11d416de94415b404
SSDEEP 49152:Dv7I22SsaNYfdPBldt698dBcjHn8RJ61bR3LoGdFZTHHB72eh2NT:DvE22SsaNYfdPBldt6+dBcjHn8RJ6H
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

193.161.193.99:1194
192.168.254.152:1194

Mutex

37c3d2aa-6a36-4ee8-a4be-f1c3187fbd03

Attributes

encryption_key
E9EE5B51F341491A9CE8837BE89BB18191B86C1E
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
python
subdirectory
SubDir

Signatures

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

Quasar payload 2 IoCs

resource	yara_rule
behavioral1/memory/4452-0-0x0000000000A50000-0x0000000000D74000-memory.dmp	family_quasar
behavioral1/files/0x0008000000023404-6.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
4392	Client.exe

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

System Information Discovery
T1082

Creates scheduled task(s) 1 TTPs 2 IoCs

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

persistence

Scheduled Task/Job

T1053

pid	Process
2132	schtasks.exe
1244	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4452	asdasd.exe
Token: SeDebugPrivilege	4392	Client.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
4392	Client.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
4392	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4392	Client.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4452 wrote to memory of 1244	4452	asdasd.exe	89
PID 4452 wrote to memory of 1244	4452	asdasd.exe	89
PID 4452 wrote to memory of 4392	4452	asdasd.exe	91
PID 4452 wrote to memory of 4392	4452	asdasd.exe	91
PID 4392 wrote to memory of 2132	4392	Client.exe	92
PID 4392 wrote to memory of 2132	4392	Client.exe	92

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\asdasd.exe
"C:\Users\Admin\AppData\Local\Temp\asdasd.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4452
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "python" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
  2⤵
  - Creates scheduled task(s)
  PID:1244
- 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:4392
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "python" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
    3⤵
    - Creates scheduled task(s)
    PID:2132

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Persistence

Scheduled Task/Job

T1053

Privilege Escalation

Scheduled Task/Job

T1053

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

Client.exe

Path C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
Size 3.1MB
SHA256 39f626850f3dbd66ff5b75f99cd531cf74e4418338ddd45d0ae20fb7ceda2b6f
MD5 30fdc0a0d22cca3c0b971c7928ca0e82
SHA1 517211383e5022bec91b521955832a69417f4042
SHA512 dcd9ae5e6ce11c93826b2d7b4d9acd201ac53cd41f20d815b308d2f3fd938b3774ea6d64f9f13ce159238ddbead7e8e126d514fe85af0da11d416de94415b404
SSDEEP 49152:Dv7I22SsaNYfdPBldt698dBcjHn8RJ61bR3LoGdFZTHHB72eh2NT:DvE22SsaNYfdPBldt6+dBcjHn8RJ6H
MD5 SHA1 SHA512 SSDEEP

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memory/4392-10-0x00007FFA27F50000-0x00007FFA28A11000-memory.dmp

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memory/4392-11-0x000000001BC00000-0x000000001BC10000-memory.dmp

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memory/4392-12-0x000000001C830000-0x000000001C880000-memory.dmp

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memory/4392-13-0x000000001C940000-0x000000001C9F2000-memory.dmp

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memory/4392-14-0x00007FFA27F50000-0x00007FFA28A11000-memory.dmp

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memory/4452-0-0x0000000000A50000-0x0000000000D74000-memory.dmp

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memory/4452-1-0x00007FFA27F50000-0x00007FFA28A11000-memory.dmp

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memory/4452-2-0x0000000002F40000-0x0000000002F50000-memory.dmp

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memory/4452-9-0x00007FFA27F50000-0x00007FFA28A11000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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