quasar | 24361c88cec81a0e499d9c5b3acb69e6d9287515a12633b0a0034d2b67bf2d07

General

Target

MSFS2024UPDATER.exe
Size

3.1MB
MD5

5061f9f48893af28f93d03dcfb71da43
SHA1

df81a197c29598332480a0e3fb32b69d31ee985e
SHA256

24361c88cec81a0e499d9c5b3acb69e6d9287515a12633b0a0034d2b67bf2d07
SHA512

3734e4acf53f921578eeb27cb0c2b2fb689812116e5e187e8afb1f83563da5e11ebbfce025f43ec7b6abac46fa8d6eabaf0cbcbb29701672e331576876ef5ab4
SSDEEP

49152:rvXlL26AaNeWgPhlmVqvMQ7XSK9xOEMkIk/JxroGdPxTHHB72eh2NT:rvVL26AaNeWgPhlmVqkQ7XSK9xn5

Score

10^/10

quasar office04 discovery spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

192.168.1.37:4782

Mutex

49b0d307-a06e-42f0-b4dd-ceae2c88d2f0

Attributes

encryption_key
B73F224CF41A826EF2EC1843B90021541FBE12A9
install_name
MSFS_2024_UPDATER.exe
log_directory
Logs
reconnect_delay
3000
startup_key
MSFS_2024_UPDATER
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/3504-1-0x0000000000680000-0x00000000009A4000-memory.dmp	family_quasar
behavioral2/files/0x0009000000023dfc-5.dat	family_quasar

Downloads MZ/PE file 1 IoCs

flow	pid	Process
22	756	Process not Found

Executes dropped EXE 1 IoCs

pid	Process
2536	MSFS_2024_UPDATER.exe

System Location Discovery: System Language Discovery 1 TTPs 1 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	MicrosoftEdgeUpdate.exe

System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 1 IoCs

Adversaries may check for Internet connectivity on compromised systems.

discovery

Internet Connection Discovery

T1016.001

pid	Process
1368	MicrosoftEdgeUpdate.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
4088	schtasks.exe
3616	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3504	MSFS2024UPDATER.exe
Token: SeDebugPrivilege	2536	MSFS_2024_UPDATER.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2536	MSFS_2024_UPDATER.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3504 wrote to memory of 4088	3504	MSFS2024UPDATER.exe	89
PID 3504 wrote to memory of 4088	3504	MSFS2024UPDATER.exe	89
PID 3504 wrote to memory of 2536	3504	MSFS2024UPDATER.exe	91
PID 3504 wrote to memory of 2536	3504	MSFS2024UPDATER.exe	91
PID 2536 wrote to memory of 3616	2536	MSFS_2024_UPDATER.exe	92
PID 2536 wrote to memory of 3616	2536	MSFS_2024_UPDATER.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\MSFS2024UPDATER.exe
"C:\Users\Admin\AppData\Local\Temp\MSFS2024UPDATER.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3504
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "MSFS_2024_UPDATER" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\MSFS_2024_UPDATER.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:4088
- C:\Users\Admin\AppData\Roaming\SubDir\MSFS_2024_UPDATER.exe
  "C:\Users\Admin\AppData\Roaming\SubDir\MSFS_2024_UPDATER.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2536
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "MSFS_2024_UPDATER" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\MSFS_2024_UPDATER.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:3616

C:\Program Files (x86)\Microsoft\EdgeUpdate\MicrosoftEdgeUpdate.exe
"C:\Program Files (x86)\Microsoft\EdgeUpdate\MicrosoftEdgeUpdate.exe" /ping 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-PGFwcCBhcHBpZD0iezhBNjlEMzQ1LUQ1NjQtNDYzYy1BRkYxLUE2OUQ5RTUzMEY5Nn0iIHZlcnNpb249IjEyMy4wLjYzMTIuMTIzIiBuZXh0dmVyc2lvbj0iIiBsYW5nPSJlbiIgYnJhbmQ9IkdHTFMiIGNsaWVudD0iIiBpbnN0YWxsYWdlPSI1IiBpbnN0YWxsZGF0ZXRpbWU9IjE3Mzg5NDU4NjAiIG9vYmVfaW5zdGFsbF90aW1lPSIxMzM4MzQxODIxNjMwOTAwMDAiPjxldmVudCBldmVudHR5cGU9IjMxIiBldmVudHJlc3VsdD0iMSIgZXJyb3Jjb2RlPSIwIiBleHRyYWNvZGUxPSIyMTc5ODYyIiBzeXN0ZW1fdXB0aW1lX3RpY2tzPSI0ODg4NDY3NTA0Ii8-PC9hcHA-PC9yZXF1ZXN0Pg
1⤵
- System Location Discovery: System Language Discovery
- System Network Configuration Discovery: Internet Connection Discovery
PID:1368

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

System Network Configuration Discovery

1

T1016

Internet Connection Discovery

1

T1016.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Roaming\SubDir\MSFS_2024_UPDATER.exe

Filesize
3.1MB

MD5
5061f9f48893af28f93d03dcfb71da43

SHA1
df81a197c29598332480a0e3fb32b69d31ee985e

SHA256
24361c88cec81a0e499d9c5b3acb69e6d9287515a12633b0a0034d2b67bf2d07

SHA512
3734e4acf53f921578eeb27cb0c2b2fb689812116e5e187e8afb1f83563da5e11ebbfce025f43ec7b6abac46fa8d6eabaf0cbcbb29701672e331576876ef5ab4

Download Submit
memory/2536-9-0x00007FFC69D40000-0x00007FFC6A801000-memory.dmp

Filesize
10.8MB

Download
memory/2536-10-0x00007FFC69D40000-0x00007FFC6A801000-memory.dmp

Filesize
10.8MB

Download
memory/2536-11-0x000000001C210000-0x000000001C260000-memory.dmp

Filesize
320KB

Download
memory/2536-12-0x000000001C320000-0x000000001C3D2000-memory.dmp

Filesize
712KB

Download
memory/2536-14-0x00007FFC69D40000-0x00007FFC6A801000-memory.dmp

Filesize
10.8MB

Download
memory/3504-0-0x00007FFC69D43000-0x00007FFC69D45000-memory.dmp

Filesize
8KB

Download
memory/3504-1-0x0000000000680000-0x00000000009A4000-memory.dmp

Filesize
3.1MB

Download
memory/3504-2-0x00007FFC69D40000-0x00007FFC6A801000-memory.dmp

Filesize
10.8MB

Download
memory/3504-8-0x00007FFC69D40000-0x00007FFC6A801000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads