quasar | 9828991298eb16c8df48b48dde0a056856f41c62ca4c694d86334cde1645e07c

Analysis

max time kernel
1799s
max time network
1492s
platform
windows11-21h2_x64
resource
win11-20241007-en
resource tags

arch:x64arch:x86image:win11-20241007-enlocale:en-usos:windows11-21h2-x64system
submitted
17-10-2024 23:54

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General

Target

Client-built.exe
Size

3.1MB
MD5

32bac0be7a9c9bdd93b8b708f47f1313
SHA1

1f0d7dd2e310613336fa569d3651a394ddb305fe
SHA256

9828991298eb16c8df48b48dde0a056856f41c62ca4c694d86334cde1645e07c
SHA512

8d797936672817abeab907c15715cf38e57eed41399c26f2af8171631d53d16d2bd693568e1b6b5a16c251f7ac030d5826a4784a4a79030753be407e794c0fb6
SSDEEP

49152:djKqzUIZA0404kub/lFqkIFFIJHZ541JOOoGVJiTHHB72eh2NT:djlzUq3404kub/lFqkIFFIJHZ5u

Score

10^/10

quasar office04 discovery spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

Name123forreal-31171.portmap.host:31171

Mutex

f9634259-eba6-40ac-8644-2c8e433257e9

Attributes

encryption_key
5FD1DA98B24B21C2214C328FD3F0A48F15BBCD2B
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Window Defender Startup
subdirectory
SubDir

Signatures

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

Quasar payload 2 IoCs

Processes:

resource	yara_rule
behavioral3/memory/3516-1-0x0000000000150000-0x0000000000474000-memory.dmp	family_quasar
behavioral3/files/0x001b00000002aac4-6.dat	family_quasar

Executes dropped EXE 1 IoCs

Processes:

Client.exe

pid	Process
1916	Client.exe

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

System Information Discovery
T1082

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

Processes:

PING.EXE

pid	Process
1280	PING.EXE

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

Processes:

PING.EXE

pid	Process
1280	PING.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

Processes:

schtasks.exeschtasks.exe

pid	Process
2724	schtasks.exe
1040	schtasks.exe

Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

vlc.exe

pid	Process
3852	vlc.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

vlc.exe

pid	Process
3852	vlc.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

Client-built.exeClient.exe

description	pid	Process
Token: SeDebugPrivilege	3516	Client-built.exe
Token: SeDebugPrivilege	1916	Client.exe

Suspicious use of FindShellTrayWindow 9 IoCs

Processes:

Client.exevlc.exe

pid	Process
1916	Client.exe
1916	Client.exe
1916	Client.exe
1916	Client.exe
1916	Client.exe
3852	vlc.exe
3852	vlc.exe
3852	vlc.exe
1916	Client.exe

Suspicious use of SendNotifyMessage 8 IoCs

Processes:

Client.exevlc.exe

pid	Process
1916	Client.exe
1916	Client.exe
1916	Client.exe
1916	Client.exe
1916	Client.exe
3852	vlc.exe
3852	vlc.exe
1916	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

vlc.exe

pid	Process
3852	vlc.exe

Suspicious use of WriteProcessMemory 14 IoCs

Processes:

Client-built.exeClient.execmd.exe

description	pid	Process	procid_target
PID 3516 wrote to memory of 2724	3516	Client-built.exe	77
PID 3516 wrote to memory of 2724	3516	Client-built.exe	77
PID 3516 wrote to memory of 1916	3516	Client-built.exe	79
PID 3516 wrote to memory of 1916	3516	Client-built.exe	79
PID 1916 wrote to memory of 1040	1916	Client.exe	80
PID 1916 wrote to memory of 1040	1916	Client.exe	80
PID 1916 wrote to memory of 3228	1916	Client.exe	88
PID 1916 wrote to memory of 3228	1916	Client.exe	88
PID 1916 wrote to memory of 1396	1916	Client.exe	90
PID 1916 wrote to memory of 1396	1916	Client.exe	90
PID 1396 wrote to memory of 4680	1396	cmd.exe	92
PID 1396 wrote to memory of 4680	1396	cmd.exe	92
PID 1396 wrote to memory of 1280	1396	cmd.exe	93
PID 1396 wrote to memory of 1280	1396	cmd.exe	93

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.exe
"C:\Users\Admin\AppData\Local\Temp\Client-built.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3516
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "Window Defender Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2724
- 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 WriteProcessMemory
  PID:1916
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "Window Defender Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:1040
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /delete /tn "Window Defender Startup" /f
    3⤵
    PID:3228
- - C:\Windows\system32\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\MGQboiiXyL49.bat" "
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1396
  - - C:\Windows\system32\chcp.com
      chcp 65001
      4⤵
      PID:4680
  - - C:\Windows\system32\PING.EXE
      ping -n 10 localhost
      4⤵
      System Network Configuration Discovery: Internet Connection Discovery
      Runs ping.exe
      PID:1280

C:\Windows\System32\rundll32.exe
C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
1⤵
PID:1040

C:\Program Files\VideoLAN\VLC\vlc.exe
"C:\Program Files\VideoLAN\VLC\vlc.exe" --started-from-file "C:\Users\Admin\Downloads\SwitchClear.wpl"
1⤵
- Suspicious behavior: AddClipboardFormatListener
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of SetWindowsHookEx
PID:3852

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

Remote System Discovery

T1018

System Information Discovery

T1082

System Network Configuration Discovery

T1016

Internet Connection Discovery

T1016.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\MGQboiiXyL49.bat

Filesize
211B

MD5
0363056680c523246fa3c5c7ef5c9141

SHA1
008647a92d3b2d461245e7024c09af396e676f73

SHA256
014c95f14d5a03ffd31bf733b2dba254db5f60e48d3095ed8a17a89f554d62e7

SHA512
cbaf91951f2660c309ede266ad026046b2c8cc25e664628b2d865a892825bc96e4ec90d29e9de2f72e5f13877785616540819f4f638f932729cc08bd5371f3a4

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

Filesize
3.1MB

MD5
32bac0be7a9c9bdd93b8b708f47f1313

SHA1
1f0d7dd2e310613336fa569d3651a394ddb305fe

SHA256
9828991298eb16c8df48b48dde0a056856f41c62ca4c694d86334cde1645e07c

SHA512
8d797936672817abeab907c15715cf38e57eed41399c26f2af8171631d53d16d2bd693568e1b6b5a16c251f7ac030d5826a4784a4a79030753be407e794c0fb6

Download Submit
memory/1916-11-0x00007FFB445D0000-0x00007FFB45092000-memory.dmp

Filesize
10.8MB

Download
memory/1916-10-0x00007FFB445D0000-0x00007FFB45092000-memory.dmp

Filesize
10.8MB

Download
memory/1916-12-0x000000001CD20000-0x000000001CD70000-memory.dmp

Filesize
320KB

Download
memory/1916-13-0x000000001CE30000-0x000000001CEE2000-memory.dmp

Filesize
712KB

Download
memory/1916-16-0x000000001CD90000-0x000000001CDA2000-memory.dmp

Filesize
72KB

Download
memory/1916-17-0x000000001CDF0000-0x000000001CE2C000-memory.dmp

Filesize
240KB

Download
memory/1916-18-0x00007FFB445D0000-0x00007FFB45092000-memory.dmp

Filesize
10.8MB

Download
memory/1916-50-0x00007FFB445D0000-0x00007FFB45092000-memory.dmp

Filesize
10.8MB

Download
memory/3516-2-0x00007FFB445D0000-0x00007FFB45092000-memory.dmp

Filesize
10.8MB

Download
memory/3516-9-0x00007FFB445D0000-0x00007FFB45092000-memory.dmp

Filesize
10.8MB

Download
memory/3516-0-0x00007FFB445D3000-0x00007FFB445D5000-memory.dmp

Filesize
8KB

Download
memory/3516-1-0x0000000000150000-0x0000000000474000-memory.dmp

Filesize
3.1MB

Download
memory/3852-24-0x00007FFB59D60000-0x00007FFB59D71000-memory.dmp

Filesize
68KB

Download
memory/3852-42-0x00007FFB4AC70000-0x00007FFB4ACD7000-memory.dmp

Filesize
412KB

Download
memory/3852-30-0x00007FFB55700000-0x00007FFB55741000-memory.dmp

Filesize
260KB

Download
memory/3852-29-0x00007FFB55F80000-0x00007FFB55F91000-memory.dmp

Filesize
68KB

Download
memory/3852-26-0x00007FFB55FC0000-0x00007FFB55FD1000-memory.dmp

Filesize
68KB

Download
memory/3852-25-0x00007FFB568C0000-0x00007FFB568D7000-memory.dmp

Filesize
92KB

Download
memory/3852-22-0x00007FFB5AA40000-0x00007FFB5AA58000-memory.dmp

Filesize
96KB

Download
memory/3852-23-0x00007FFB59E70000-0x00007FFB59E87000-memory.dmp

Filesize
92KB

Download
memory/3852-21-0x00007FFB3D580000-0x00007FFB3D836000-memory.dmp

Filesize
2.7MB

Download
memory/3852-28-0x00007FFB3D140000-0x00007FFB3D34B000-memory.dmp

Filesize
2.0MB

Download
memory/3852-44-0x00007FFB4B030000-0x00007FFB4B041000-memory.dmp

Filesize
68KB

Download
memory/3852-31-0x00007FFB399E0000-0x00007FFB3AA90000-memory.dmp

Filesize
16.7MB

Download
memory/3852-43-0x00007FFB45180000-0x00007FFB451FC000-memory.dmp

Filesize
496KB

Download
memory/3852-27-0x00007FFB55FA0000-0x00007FFB55FBD000-memory.dmp

Filesize
116KB

Download
memory/3852-41-0x00007FFB3D030000-0x00007FFB3D13E000-memory.dmp

Filesize
1.1MB

Download
memory/3852-40-0x00007FFB4BF50000-0x00007FFB4BF80000-memory.dmp

Filesize
192KB

Download
memory/3852-39-0x00007FFB4BF80000-0x00007FFB4BF98000-memory.dmp

Filesize
96KB

Download
memory/3852-38-0x00007FFB4BFA0000-0x00007FFB4BFB1000-memory.dmp

Filesize
68KB

Download
memory/3852-37-0x00007FFB529D0000-0x00007FFB529EB000-memory.dmp

Filesize
108KB

Download
memory/3852-36-0x00007FFB529F0000-0x00007FFB52A01000-memory.dmp

Filesize
68KB

Download
memory/3852-35-0x00007FFB556C0000-0x00007FFB556D1000-memory.dmp

Filesize
68KB

Download
memory/3852-34-0x00007FFB556E0000-0x00007FFB556F1000-memory.dmp

Filesize
68KB

Download
memory/3852-33-0x00007FFB55920000-0x00007FFB55938000-memory.dmp

Filesize
96KB

Download
memory/3852-32-0x00007FFB55C40000-0x00007FFB55C61000-memory.dmp

Filesize
132KB

Download
memory/3852-20-0x00007FFB59BE0000-0x00007FFB59C14000-memory.dmp

Filesize
208KB

Download
memory/3852-19-0x00007FF6B26E0000-0x00007FF6B27D8000-memory.dmp

Filesize
992KB

Download