quasar | a87bae829ed2396145c0fe182249e6f057a06b230c03165be042c1902167d40d

Analysis

max time kernel
16s
max time network
18s
platform
windows10-ltsc 2021_x64
resource
win10ltsc2021-20241023-en
resource tags

arch:x64arch:x86image:win10ltsc2021-20241023-enlocale:en-usos:windows10-ltsc 2021-x64system
submitted
05-11-2024 21:22

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General

Target

UnionFreeBeta.exe
Size

3.1MB
MD5

aede48915ee20fd0a295c890cd5d6358
SHA1

f2a1b241364307a4aa6392644f8af91f5fe9e481
SHA256

a87bae829ed2396145c0fe182249e6f057a06b230c03165be042c1902167d40d
SHA512

cb52842b3ab23afed321fdfa18951354bd345a91d37f8a3d999d6ed4252c24448892863a5fe2f97052cac2d8beb3aed245ffdda18c27f6233bebf18de9f81288
SSDEEP

49152:PvulL26AaNeWgPhlmVqvMQ7XSKflRJ6vbR3LoGdyTHHB72eh2NT:PveL26AaNeWgPhlmVqkQ7XSKflRJ6B

Score

10^/10

quasar unionfreemenu spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

UnionFreeMenu

wydidk-54735.portmap.host:54735

Mutex

a66c87d1-9ff9-41cd-b89a-e4abdaec6149

Attributes

encryption_key
02F7E65772D519DFA0CB988D3EBC116D7AF084EA
install_name
UnionSZettings.exe
log_directory
Logs
reconnect_delay
3000
startup_key
UnionMenuLoader
subdirectory
SubDir

Signatures

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

Quasar payload 2 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1496-1-0x00000000007F0000-0x0000000000B14000-memory.dmp	family_quasar
behavioral1/files/0x00280000000450d2-4.dat	family_quasar

Executes dropped EXE 1 IoCs

Processes:

UnionSZettings.exe

pid	Process
2456	UnionSZettings.exe

Drops file in Program Files directory 1 IoCs

Processes:

UnionFreeBeta.exe

description	ioc	Process
File created	C:\Program Files\SubDir\UnionSZettings.exe	UnionFreeBeta.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
2000	schtasks.exe
5588	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

UnionFreeBeta.exeUnionSZettings.exe

description	pid	Process
Token: SeDebugPrivilege	1496	UnionFreeBeta.exe
Token: SeDebugPrivilege	2456	UnionSZettings.exe

Suspicious use of FindShellTrayWindow 1 IoCs

Processes:

UnionSZettings.exe

pid	Process
2456	UnionSZettings.exe

Suspicious use of SendNotifyMessage 1 IoCs

Processes:

UnionSZettings.exe

pid	Process
2456	UnionSZettings.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

UnionSZettings.exe

pid	Process
2456	UnionSZettings.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

UnionFreeBeta.exeUnionSZettings.exe

description	pid	Process	procid_target
PID 1496 wrote to memory of 2000	1496	UnionFreeBeta.exe	85
PID 1496 wrote to memory of 2000	1496	UnionFreeBeta.exe	85
PID 1496 wrote to memory of 2456	1496	UnionFreeBeta.exe	87
PID 1496 wrote to memory of 2456	1496	UnionFreeBeta.exe	87
PID 2456 wrote to memory of 5588	2456	UnionSZettings.exe	90
PID 2456 wrote to memory of 5588	2456	UnionSZettings.exe	90

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\UnionFreeBeta.exe
"C:\Users\Admin\AppData\Local\Temp\UnionFreeBeta.exe"
1⤵
- Drops file in Program Files directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1496
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "UnionMenuLoader" /sc ONLOGON /tr "C:\Program Files\SubDir\UnionSZettings.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2000
- C:\Program Files\SubDir\UnionSZettings.exe
  "C:\Program Files\SubDir\UnionSZettings.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:2456
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "UnionMenuLoader" /sc ONLOGON /tr "C:\Program Files\SubDir\UnionSZettings.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:5588

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

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Program Files\SubDir\UnionSZettings.exe

Filesize
3.1MB

MD5
aede48915ee20fd0a295c890cd5d6358

SHA1
f2a1b241364307a4aa6392644f8af91f5fe9e481

SHA256
a87bae829ed2396145c0fe182249e6f057a06b230c03165be042c1902167d40d

SHA512
cb52842b3ab23afed321fdfa18951354bd345a91d37f8a3d999d6ed4252c24448892863a5fe2f97052cac2d8beb3aed245ffdda18c27f6233bebf18de9f81288

Download Submit
memory/1496-0-0x00007FF9D3EF3000-0x00007FF9D3EF5000-memory.dmp

Filesize
8KB

Download
memory/1496-1-0x00000000007F0000-0x0000000000B14000-memory.dmp

Filesize
3.1MB

Download
memory/1496-2-0x00007FF9D3EF0000-0x00007FF9D49B2000-memory.dmp

Filesize
10.8MB

Download
memory/1496-5-0x00007FF9D3EF0000-0x00007FF9D49B2000-memory.dmp

Filesize
10.8MB

Download
memory/2456-6-0x00007FF9D3EF0000-0x00007FF9D49B2000-memory.dmp

Filesize
10.8MB

Download
memory/2456-7-0x00007FF9D3EF0000-0x00007FF9D49B2000-memory.dmp

Filesize
10.8MB

Download
memory/2456-8-0x000000001C8C0000-0x000000001C910000-memory.dmp

Filesize
320KB

Download
memory/2456-9-0x000000001C9D0000-0x000000001CA82000-memory.dmp

Filesize
712KB

Download
memory/2456-10-0x00007FF9D3EF0000-0x00007FF9D49B2000-memory.dmp

Filesize
10.8MB

Download