quasar | b474b5897b9d187e03a1eec0cde75b65d3d92566c05c0fec4beed484ceb7915a

Analysis

max time kernel
2s
max time network
65s
platform
windows10-2004_x64
resource
win10v2004-20231222-en
resource tags

arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system
submitted
08/01/2024, 09:47

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General

Target
Client.exe
Size 3.1MB
Sample240108-lr7snagca3
SHA256 b474b5897b9d187e03a1eec0cde75b65d3d92566c05c0fec4beed484ceb7915a
MD5 853a7987905a4f5e0d6290b181863040
SHA1 b07bf3200fc208174beff830f2d12ec20d6df24f
SHA512 7dca0c4138c512f69b5d9f996fab0ef9bd64b0cbe1a45c6675a67217cb4b88aea8a35042b05a9fcb7135d3f6ace727d7229a79b93e00df214373452b3b32c388
SSDEEP 49152:DvyI22SsaNYfdPBldt698dBcjHehRJ6gbR3LoGdPTHHB72eh2NT:Dvf22SsaNYfdPBldt6+dBcjHehRJ66
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

192.168.0.1:4782

Mutex

d55e5652-fab2-4c84-8117-5c54a30282f4

Attributes

encryption_key
E932B5EAAFA94D22BF2D8329D2416E9BDF7A28F3
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Quasar Client Startup
subdirectory
SubDir

Signatures

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

Quasar payload 1 IoCs

resource	yara_rule
behavioral2/memory/5016-0-0x0000000000B50000-0x0000000000E74000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
3916	Client.exe

Creates scheduled task(s) 1 TTPs 15 IoCs

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

persistence

Scheduled Task/Job

T1053

pid	Process
1012	schtasks.exe
4936	schtasks.exe
1788	schtasks.exe
400	schtasks.exe
1288	schtasks.exe
2988	schtasks.exe
1404	schtasks.exe
4284	schtasks.exe
2656	schtasks.exe
1204	schtasks.exe
3884	schtasks.exe
3448	schtasks.exe
3560	schtasks.exe
2172	schtasks.exe
1420	schtasks.exe

Runs ping.exe 1 TTPs 14 IoCs

Remote System Discovery

T1018

pid	Process
4408	PING.EXE
780	PING.EXE
4744	PING.EXE
3496	PING.EXE
4504	PING.EXE
388	PING.EXE
2212	PING.EXE
4128	PING.EXE
1252	PING.EXE
2908	PING.EXE
4960	PING.EXE
4832	PING.EXE
2476	PING.EXE
3340	PING.EXE

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	5016	Client.exe
Token: SeDebugPrivilege	3916	Client.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 5016 wrote to memory of 1012	5016	Client.exe	33
PID 5016 wrote to memory of 1012	5016	Client.exe	33
PID 5016 wrote to memory of 3916	5016	Client.exe	31
PID 5016 wrote to memory of 3916	5016	Client.exe	31
PID 3916 wrote to memory of 3884	3916	Client.exe	40
PID 3916 wrote to memory of 3884	3916	Client.exe	40

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.exe
"C:\Users\Admin\AppData\Local\Temp\Client.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:5016
- 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 WriteProcessMemory
  PID:3916
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
    3⤵
    - Creates scheduled task(s)
    PID:3884
- - C:\Windows\system32\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\g0zabTVoF1mG.bat" "
    3⤵
    PID:2588
  - - C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
      "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
      4⤵
      PID:2072
    - - C:\Windows\SYSTEM32\schtasks.exe
        
        "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
        5⤵
        Creates scheduled task(s)
        
        PID:4936
    - - C:\Windows\system32\cmd.exe
        
        C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\ooNvgYlGvZZ3.bat" "
        5⤵
        
        PID:4836
      - C:\Windows\system32\PING.EXE
        
        ping -n 10 localhost
        6⤵
        Runs ping.exe
        
        PID:2908
      - C:\Windows\system32\chcp.com
        
        chcp 65001
        6⤵
        
        PID:4144
      - C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
        
        "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
        6⤵
        
        PID:3576
        
        C:\Windows\SYSTEM32\schtasks.exe
        
        "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
        7⤵
        Creates scheduled task(s)
        
        PID:4284
        
        C:\Windows\system32\cmd.exe
        
        C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\hFS5OwoIn6Cy.bat" "
        7⤵
        
        PID:556
        
        C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
        
        "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
        8⤵
        
        PID:4844
        
        C:\Windows\SYSTEM32\schtasks.exe
        
        "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
        9⤵
        Creates scheduled task(s)
        
        PID:1788
        
        C:\Windows\system32\cmd.exe
        
        C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\H3L7HH83vTDG.bat" "
        9⤵
        
        PID:1068
        
        C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
        
        "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
        10⤵
        
        PID:2828
        
        C:\Windows\SYSTEM32\schtasks.exe
        
        "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
        11⤵
        Creates scheduled task(s)
        
        PID:3448
        
        C:\Windows\system32\cmd.exe
        
        C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\yy5oOuvh7LwE.bat" "
        11⤵
        
        PID:4836
        
        C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
        
        "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
        12⤵
        
        PID:2368
        
        C:\Windows\SYSTEM32\schtasks.exe
        
        "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
        13⤵
        Creates scheduled task(s)
        
        PID:3560
        
        C:\Windows\system32\cmd.exe
        
        C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\54HALPxa1aMS.bat" "
        13⤵
        
        PID:3580
        
        C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
        
        "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
        14⤵
        
        PID:4876
        
        C:\Windows\SYSTEM32\schtasks.exe
        
        "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
        15⤵
        Creates scheduled task(s)
        
        PID:2656
        
        C:\Windows\system32\cmd.exe
        
        C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\viGTfqdpyGPZ.bat" "
        15⤵
        
        PID:2576
        
        C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
        
        "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
        16⤵
        
        PID:3496
        
        C:\Windows\SYSTEM32\schtasks.exe
        
        "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
        17⤵
        Creates scheduled task(s)
        
        PID:2172
        
        C:\Windows\system32\cmd.exe
        
        C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\XKI8f97RQmLs.bat" "
        17⤵
        
        PID:2320
        
        C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
        
        "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
        18⤵
        
        PID:1488
        
        C:\Windows\SYSTEM32\schtasks.exe
        
        "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
        19⤵
        Creates scheduled task(s)
        
        PID:400
        
        C:\Windows\system32\cmd.exe
        
        C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\nVI6iDY6JS5U.bat" "
        19⤵
        
        PID:3744
        
        C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
        
        "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
        20⤵
        
        PID:1944
        
        C:\Windows\SYSTEM32\schtasks.exe
        
        "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
        21⤵
        Creates scheduled task(s)
        
        PID:1420
        
        C:\Windows\system32\cmd.exe
        
        C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\msbdrlgNBCuo.bat" "
        21⤵
        
        PID:1160
        
        C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
        
        "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
        22⤵
        
        PID:516
        
        C:\Windows\SYSTEM32\schtasks.exe
        
        "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
        23⤵
        Creates scheduled task(s)
        
        PID:1204
        
        C:\Windows\system32\cmd.exe
        
        C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\QDd9k9a46kWf.bat" "
        23⤵
        
        PID:4864
        
        C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
        
        "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
        24⤵
        
        PID:1072
        
        C:\Windows\SYSTEM32\schtasks.exe
        
        "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
        25⤵
        Creates scheduled task(s)
        
        PID:1288
        
        C:\Windows\system32\cmd.exe
        
        C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\7Eeiu698HcXB.bat" "
        25⤵
        
        PID:1964
        
        C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
        
        "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
        26⤵
        
        PID:4464
        
        C:\Windows\SYSTEM32\schtasks.exe
        
        "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
        27⤵
        Creates scheduled task(s)
        
        PID:2988
        
        C:\Windows\system32\cmd.exe
        
        C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\vJ5I44Jl0JmB.bat" "
        27⤵
        
        PID:2760
        
        C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
        
        "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
        28⤵
        
        PID:2076
        
        C:\Windows\SYSTEM32\schtasks.exe
        
        "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
        29⤵
        Creates scheduled task(s)
        
        PID:1404
        
        C:\Windows\system32\cmd.exe
        
        C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\PVilWKj8caYZ.bat" "
        29⤵
        
        PID:2492
      - C:\Windows\system32\PING.EXE
        
        ping -n 10 localhost
        6⤵
        Runs ping.exe
        
        PID:4408
      - C:\Windows\system32\chcp.com
        
        chcp 65001
        6⤵
        
        PID:4536
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
  2⤵
  - Creates scheduled task(s)
  PID:1012

C:\Windows\system32\PING.EXE
ping -n 10 localhost
1⤵
- Runs ping.exe
PID:2212

C:\Windows\system32\chcp.com
chcp 65001
1⤵
PID:1496

C:\Windows\system32\PING.EXE
ping -n 10 localhost
1⤵
- Runs ping.exe
PID:4960

C:\Windows\system32\chcp.com
chcp 65001
1⤵
PID:3888

C:\Windows\system32\PING.EXE
ping -n 10 localhost
1⤵
- Runs ping.exe
PID:4832

C:\Windows\system32\chcp.com
chcp 65001
1⤵
PID:4592

C:\Windows\system32\PING.EXE
ping -n 10 localhost
1⤵
- Runs ping.exe
PID:2476

C:\Windows\system32\chcp.com
chcp 65001
1⤵
PID:2424

C:\Windows\system32\PING.EXE
ping -n 10 localhost
1⤵
- Runs ping.exe
PID:4128

C:\Windows\system32\chcp.com
chcp 65001
1⤵
PID:2564

C:\Windows\system32\PING.EXE
ping -n 10 localhost
1⤵
- Runs ping.exe
PID:780

C:\Windows\system32\chcp.com
chcp 65001
1⤵
PID:1252

C:\Windows\system32\PING.EXE
ping -n 10 localhost
1⤵
- Runs ping.exe
PID:3340

C:\Windows\system32\chcp.com
chcp 65001
1⤵
PID:4844

C:\Windows\system32\PING.EXE
ping -n 10 localhost
1⤵
- Runs ping.exe
PID:3496

C:\Windows\system32\chcp.com
chcp 65001
1⤵
PID:4428

C:\Windows\system32\PING.EXE
ping -n 10 localhost
1⤵
- Runs ping.exe
PID:4504

C:\Windows\system32\chcp.com
chcp 65001
1⤵
PID:1364

C:\Windows\system32\PING.EXE
ping -n 10 localhost
1⤵
- Runs ping.exe
PID:1252

C:\Windows\system32\chcp.com
chcp 65001
1⤵
PID:5108

C:\Windows\system32\PING.EXE
ping -n 10 localhost
1⤵
- Runs ping.exe
PID:388

C:\Windows\system32\chcp.com
chcp 65001
1⤵
PID:780

C:\Windows\system32\PING.EXE
ping -n 10 localhost
1⤵
- Runs ping.exe
PID:4744

C:\Windows\system32\chcp.com
chcp 65001
1⤵
PID:3792

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

Remote System Discovery

T1018

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/516-99-0x00007FF9D6C90000-0x00007FF9D7751000-memory.dmp

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memory/516-94-0x000000001B7D0000-0x000000001B7E0000-memory.dmp

Download

memory/516-93-0x00007FF9D6C90000-0x00007FF9D7751000-memory.dmp

Download

memory/1072-101-0x00007FF9D6BE0000-0x00007FF9D76A1000-memory.dmp

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memory/1072-102-0x00000000029B0000-0x00000000029C0000-memory.dmp

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memory/1072-107-0x00007FF9D6BE0000-0x00007FF9D76A1000-memory.dmp

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memory/1488-78-0x0000000002EA0000-0x0000000002EB0000-memory.dmp

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memory/1488-77-0x00007FF9D6BE0000-0x00007FF9D76A1000-memory.dmp

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memory/1488-83-0x00007FF9D6BE0000-0x00007FF9D76A1000-memory.dmp

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memory/1944-91-0x00007FF9D6C90000-0x00007FF9D7751000-memory.dmp

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memory/1944-85-0x00007FF9D6C90000-0x00007FF9D7751000-memory.dmp

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memory/1944-86-0x000000001B300000-0x000000001B310000-memory.dmp

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memory/2072-21-0x00007FF9D7340000-0x00007FF9D7E01000-memory.dmp

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memory/2072-27-0x00007FF9D7340000-0x00007FF9D7E01000-memory.dmp

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memory/2072-22-0x0000000000E00000-0x0000000000E10000-memory.dmp

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memory/2076-123-0x00007FF9D6C90000-0x00007FF9D7751000-memory.dmp

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memory/2076-118-0x000000001BC60000-0x000000001BC70000-memory.dmp

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memory/2076-117-0x00007FF9D6C90000-0x00007FF9D7751000-memory.dmp

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memory/2368-54-0x0000000002EC0000-0x0000000002ED0000-memory.dmp

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memory/2368-53-0x00007FF9D6B20000-0x00007FF9D75E1000-memory.dmp

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memory/2368-59-0x00007FF9D6B20000-0x00007FF9D75E1000-memory.dmp

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memory/2828-46-0x000000001B760000-0x000000001B770000-memory.dmp

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memory/2828-51-0x00007FF9D7020000-0x00007FF9D7AE1000-memory.dmp

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memory/2828-45-0x00007FF9D7020000-0x00007FF9D7AE1000-memory.dmp

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memory/3496-70-0x000000001B400000-0x000000001B410000-memory.dmp

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memory/3496-75-0x00007FF9D6550000-0x00007FF9D7011000-memory.dmp

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memory/3496-69-0x00007FF9D6550000-0x00007FF9D7011000-memory.dmp

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memory/3576-29-0x00007FF9D7160000-0x00007FF9D7C21000-memory.dmp

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memory/3576-30-0x000000001B140000-0x000000001B150000-memory.dmp

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memory/3576-35-0x00007FF9D7160000-0x00007FF9D7C21000-memory.dmp

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memory/3916-11-0x000000001B930000-0x000000001B940000-memory.dmp

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memory/3916-9-0x00007FF9D7B80000-0x00007FF9D8641000-memory.dmp

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memory/3916-12-0x000000001B870000-0x000000001B8C0000-memory.dmp

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memory/3916-13-0x000000001C1F0000-0x000000001C2A2000-memory.dmp

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memory/3916-19-0x00007FF9D7B80000-0x00007FF9D8641000-memory.dmp

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memory/4464-110-0x000000001BDF0000-0x000000001BE00000-memory.dmp

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memory/4464-109-0x00007FF9D6C90000-0x00007FF9D7751000-memory.dmp

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memory/4464-114-0x00007FF9D6C90000-0x00007FF9D7751000-memory.dmp

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memory/4844-37-0x00007FF9D7160000-0x00007FF9D7C21000-memory.dmp

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memory/4844-38-0x0000000002910000-0x0000000002920000-memory.dmp

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memory/4844-43-0x00007FF9D7160000-0x00007FF9D7C21000-memory.dmp

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memory/4876-62-0x000000001B380000-0x000000001B390000-memory.dmp

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memory/4876-61-0x00007FF9D6B20000-0x00007FF9D75E1000-memory.dmp

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memory/4876-67-0x00007FF9D6B20000-0x00007FF9D75E1000-memory.dmp

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memory/5016-0-0x0000000000B50000-0x0000000000E74000-memory.dmp

Download

memory/5016-10-0x00007FF9D7B80000-0x00007FF9D8641000-memory.dmp

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memory/5016-2-0x0000000002DE0000-0x0000000002DF0000-memory.dmp

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memory/5016-1-0x00007FF9D7B80000-0x00007FF9D8641000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads