quasar | 695bc096a65c4bd026b95d5363a4b9c316cec8fec3672808e036081397da6df8

Analysis

max time kernel
150s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
18-12-2024 02:38

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General

Target

695bc096a65c4bd026b95d5363a4b9c316cec8fec3672808e036081397da6df8.exe
Size

3.1MB
MD5

fc6a9a66fb9a404078fe5c31d73c3bab
SHA1

2cfb6b088ed8ab7ca66299d094813ce2d04e5677
SHA256

695bc096a65c4bd026b95d5363a4b9c316cec8fec3672808e036081397da6df8
SHA512

5edd45b69ca36e87ae399eb8260eb47411575a7b8296007b948b8a7c4b8200c0bda115cd223029bf39095d64a5e1c0dbd381d4b6947a67560e0a9142e18a642f
SSDEEP

49152:3vFt62XlaSFNWPjljiFa2RoUYIDew65Bxz/oGdVaTHHB72eh2NT:3v362XlaSFNWPjljiFXRoUYIZ6d

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

104.251.123.245:23600

Mutex

4119a2e0-4ae4-4843-8534-99af91a2475d

Attributes

encryption_key
DF6316067206E09C1F85138FCEBD56F5D94BF6AE
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Startup
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
behavioral2/memory/4724-1-0x0000000000D40000-0x0000000001068000-memory.dmp	family_quasar
behavioral2/files/0x000b000000023b70-5.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
4024	Client.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

pid	Process
4680	schtasks.exe
3500	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4724	695bc096a65c4bd026b95d5363a4b9c316cec8fec3672808e036081397da6df8.exe
Token: SeDebugPrivilege	4024	Client.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
4024	Client.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
4024	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4024	Client.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4724 wrote to memory of 4680	4724	695bc096a65c4bd026b95d5363a4b9c316cec8fec3672808e036081397da6df8.exe	83
PID 4724 wrote to memory of 4680	4724	695bc096a65c4bd026b95d5363a4b9c316cec8fec3672808e036081397da6df8.exe	83
PID 4724 wrote to memory of 4024	4724	695bc096a65c4bd026b95d5363a4b9c316cec8fec3672808e036081397da6df8.exe	85
PID 4724 wrote to memory of 4024	4724	695bc096a65c4bd026b95d5363a4b9c316cec8fec3672808e036081397da6df8.exe	85
PID 4024 wrote to memory of 3500	4024	Client.exe	86
PID 4024 wrote to memory of 3500	4024	Client.exe	86

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\695bc096a65c4bd026b95d5363a4b9c316cec8fec3672808e036081397da6df8.exe
"C:\Users\Admin\AppData\Local\Temp\695bc096a65c4bd026b95d5363a4b9c316cec8fec3672808e036081397da6df8.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4724
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:4680
- 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:4024
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:3500

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

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\SubDir\Client.exe

Filesize
3.1MB

MD5
fc6a9a66fb9a404078fe5c31d73c3bab

SHA1
2cfb6b088ed8ab7ca66299d094813ce2d04e5677

SHA256
695bc096a65c4bd026b95d5363a4b9c316cec8fec3672808e036081397da6df8

SHA512
5edd45b69ca36e87ae399eb8260eb47411575a7b8296007b948b8a7c4b8200c0bda115cd223029bf39095d64a5e1c0dbd381d4b6947a67560e0a9142e18a642f

Download Submit
memory/4024-8-0x00007FFEC95C0000-0x00007FFECA081000-memory.dmp

Filesize
10.8MB

Download
memory/4024-10-0x00007FFEC95C0000-0x00007FFECA081000-memory.dmp

Filesize
10.8MB

Download
memory/4024-11-0x000000001BB00000-0x000000001BB50000-memory.dmp

Filesize
320KB

Download
memory/4024-12-0x000000001C320000-0x000000001C3D2000-memory.dmp

Filesize
712KB

Download
memory/4024-13-0x00007FFEC95C0000-0x00007FFECA081000-memory.dmp

Filesize
10.8MB

Download
memory/4724-0-0x00007FFEC95C3000-0x00007FFEC95C5000-memory.dmp

Filesize
8KB

Download
memory/4724-1-0x0000000000D40000-0x0000000001068000-memory.dmp

Filesize
3.2MB

Download
memory/4724-2-0x00007FFEC95C0000-0x00007FFECA081000-memory.dmp

Filesize
10.8MB

Download
memory/4724-9-0x00007FFEC95C0000-0x00007FFECA081000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads