quasar | 01de053d9560d419f0b6c35dbddb1175eb1fd7a21450989332024b812d39c4c2

Analysis

max time kernel
147s
max time network
149s
platform
windows7_x64
resource
win7-20241010-en
resource tags

arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-x64system
submitted
03-12-2024 17:04

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General

Target

Bestellung-021224-901003637.exe
Size

3.7MB
MD5

15f259b30ec72a5217144834f7f5b564
SHA1

baed3fe7d059a497f856e263431ccd3872ef1ea1
SHA256

01de053d9560d419f0b6c35dbddb1175eb1fd7a21450989332024b812d39c4c2
SHA512

5e1148a9cf8008b7c38d067ec34e5c3bc7255341d114476532f8111ea2c3e654eb70b0a439aaaea22543576f09b9cec269f9b3414a6a24fc54b89c7c677c5f47
SSDEEP

98304:ZrAsTIZbqqBQjwske/pCT66UNYekeWY0CE9:ZcCSL0ke/pO5ekeWtCE9

Score

10^/10

quasar david discovery execution spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

DAVID

hoffmann3.ydns.eu:5829

Mutex

532aca2b-96ff-44aa-9213-031e975919ac

Attributes

encryption_key
C5B555A83D127A9553D4FB1FCECB35CE8E91A447
install_name
outlooks.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Outlooks
subdirectory
WindowsUpdates

Signatures

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

Quasar payload 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/3044-31-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar
behavioral1/memory/3044-29-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar
behavioral1/memory/3044-28-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar
behavioral1/memory/3044-25-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar
behavioral1/memory/3044-23-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar

Command and Scripting Interpreter: PowerShell 1 TTPs 4 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

Processes:

powershell.exepowershell.exepowershell.exepowershell.exe

pid	Process
3020	powershell.exe
2788	powershell.exe
2844	powershell.exe
1932	powershell.exe

Executes dropped EXE 2 IoCs

Processes:

outlooks.exeoutlooks.exe

pid	Process
1964	outlooks.exe
1588	outlooks.exe

Loads dropped DLL 1 IoCs

Processes:

Bestellung-021224-901003637.exe

pid	Process
3044	Bestellung-021224-901003637.exe

Suspicious use of SetThreadContext 2 IoCs

Processes:

Bestellung-021224-901003637.exeoutlooks.exe

description	pid	Process	procid_target
PID 1704 set thread context of 3044	1704	Bestellung-021224-901003637.exe	37
PID 1964 set thread context of 1588	1964	outlooks.exe	47

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 12 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

Processes:

outlooks.exepowershell.exepowershell.exeschtasks.exeoutlooks.exeBestellung-021224-901003637.exepowershell.exepowershell.exeschtasks.exeBestellung-021224-901003637.exeschtasks.exeschtasks.exe

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	outlooks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	outlooks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Bestellung-021224-901003637.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Bestellung-021224-901003637.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 4 IoCs

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

persistence execution

Scheduled Task

T1053.005

Processes:

schtasks.exeschtasks.exeschtasks.exeschtasks.exe

pid	Process
2944	schtasks.exe
2480	schtasks.exe
1368	schtasks.exe
752	schtasks.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

powershell.exepowershell.exepowershell.exepowershell.exe

pid	Process
2788	powershell.exe
3020	powershell.exe
1932	powershell.exe
2844	powershell.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

Processes:

powershell.exepowershell.exeBestellung-021224-901003637.exepowershell.exepowershell.exeoutlooks.exe

description	pid	Process
Token: SeDebugPrivilege	2788	powershell.exe
Token: SeDebugPrivilege	3020	powershell.exe
Token: SeDebugPrivilege	3044	Bestellung-021224-901003637.exe
Token: SeDebugPrivilege	1932	powershell.exe
Token: SeDebugPrivilege	2844	powershell.exe
Token: SeDebugPrivilege	1588	outlooks.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

outlooks.exe

pid	Process
1588	outlooks.exe

Suspicious use of WriteProcessMemory 54 IoCs

Processes:

Bestellung-021224-901003637.exeBestellung-021224-901003637.exeoutlooks.exeoutlooks.exe

description	pid	Process	procid_target
PID 1704 wrote to memory of 3020	1704	Bestellung-021224-901003637.exe	31
PID 1704 wrote to memory of 3020	1704	Bestellung-021224-901003637.exe	31
PID 1704 wrote to memory of 3020	1704	Bestellung-021224-901003637.exe	31
PID 1704 wrote to memory of 3020	1704	Bestellung-021224-901003637.exe	31
PID 1704 wrote to memory of 2788	1704	Bestellung-021224-901003637.exe	33
PID 1704 wrote to memory of 2788	1704	Bestellung-021224-901003637.exe	33
PID 1704 wrote to memory of 2788	1704	Bestellung-021224-901003637.exe	33
PID 1704 wrote to memory of 2788	1704	Bestellung-021224-901003637.exe	33
PID 1704 wrote to memory of 2944	1704	Bestellung-021224-901003637.exe	35
PID 1704 wrote to memory of 2944	1704	Bestellung-021224-901003637.exe	35
PID 1704 wrote to memory of 2944	1704	Bestellung-021224-901003637.exe	35
PID 1704 wrote to memory of 2944	1704	Bestellung-021224-901003637.exe	35
PID 1704 wrote to memory of 3044	1704	Bestellung-021224-901003637.exe	37
PID 1704 wrote to memory of 3044	1704	Bestellung-021224-901003637.exe	37
PID 1704 wrote to memory of 3044	1704	Bestellung-021224-901003637.exe	37
PID 1704 wrote to memory of 3044	1704	Bestellung-021224-901003637.exe	37
PID 1704 wrote to memory of 3044	1704	Bestellung-021224-901003637.exe	37
PID 1704 wrote to memory of 3044	1704	Bestellung-021224-901003637.exe	37
PID 1704 wrote to memory of 3044	1704	Bestellung-021224-901003637.exe	37
PID 1704 wrote to memory of 3044	1704	Bestellung-021224-901003637.exe	37
PID 1704 wrote to memory of 3044	1704	Bestellung-021224-901003637.exe	37
PID 3044 wrote to memory of 2480	3044	Bestellung-021224-901003637.exe	38
PID 3044 wrote to memory of 2480	3044	Bestellung-021224-901003637.exe	38
PID 3044 wrote to memory of 2480	3044	Bestellung-021224-901003637.exe	38
PID 3044 wrote to memory of 2480	3044	Bestellung-021224-901003637.exe	38
PID 3044 wrote to memory of 1964	3044	Bestellung-021224-901003637.exe	40
PID 3044 wrote to memory of 1964	3044	Bestellung-021224-901003637.exe	40
PID 3044 wrote to memory of 1964	3044	Bestellung-021224-901003637.exe	40
PID 3044 wrote to memory of 1964	3044	Bestellung-021224-901003637.exe	40
PID 1964 wrote to memory of 1932	1964	outlooks.exe	41
PID 1964 wrote to memory of 1932	1964	outlooks.exe	41
PID 1964 wrote to memory of 1932	1964	outlooks.exe	41
PID 1964 wrote to memory of 1932	1964	outlooks.exe	41
PID 1964 wrote to memory of 2844	1964	outlooks.exe	43
PID 1964 wrote to memory of 2844	1964	outlooks.exe	43
PID 1964 wrote to memory of 2844	1964	outlooks.exe	43
PID 1964 wrote to memory of 2844	1964	outlooks.exe	43
PID 1964 wrote to memory of 1368	1964	outlooks.exe	44
PID 1964 wrote to memory of 1368	1964	outlooks.exe	44
PID 1964 wrote to memory of 1368	1964	outlooks.exe	44
PID 1964 wrote to memory of 1368	1964	outlooks.exe	44
PID 1964 wrote to memory of 1588	1964	outlooks.exe	47
PID 1964 wrote to memory of 1588	1964	outlooks.exe	47
PID 1964 wrote to memory of 1588	1964	outlooks.exe	47
PID 1964 wrote to memory of 1588	1964	outlooks.exe	47
PID 1964 wrote to memory of 1588	1964	outlooks.exe	47
PID 1964 wrote to memory of 1588	1964	outlooks.exe	47
PID 1964 wrote to memory of 1588	1964	outlooks.exe	47
PID 1964 wrote to memory of 1588	1964	outlooks.exe	47
PID 1964 wrote to memory of 1588	1964	outlooks.exe	47
PID 1588 wrote to memory of 752	1588	outlooks.exe	48
PID 1588 wrote to memory of 752	1588	outlooks.exe	48
PID 1588 wrote to memory of 752	1588	outlooks.exe	48
PID 1588 wrote to memory of 752	1588	outlooks.exe	48

C:\Users\Admin\AppData\Local\Temp\Bestellung-021224-901003637.exe
"C:\Users\Admin\AppData\Local\Temp\Bestellung-021224-901003637.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1704
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\Bestellung-021224-901003637.exe"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3020
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\eNuXmIwkixzW.exe"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2788
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\eNuXmIwkixzW" /XML "C:\Users\Admin\AppData\Local\Temp\tmp1813.tmp"
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:2944
- C:\Users\Admin\AppData\Local\Temp\Bestellung-021224-901003637.exe
  "C:\Users\Admin\AppData\Local\Temp\Bestellung-021224-901003637.exe"
  2⤵
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:3044
- - C:\Windows\SysWOW64\schtasks.exe
    "schtasks" /create /tn "Outlooks" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\WindowsUpdates\outlooks.exe" /rl HIGHEST /f
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:2480
- - C:\Users\Admin\AppData\Roaming\WindowsUpdates\outlooks.exe
    "C:\Users\Admin\AppData\Roaming\WindowsUpdates\outlooks.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:1964
  - - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\WindowsUpdates\outlooks.exe"
      4⤵
      Command and Scripting Interpreter: PowerShell
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:1932
  - - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\eNuXmIwkixzW.exe"
      4⤵
      Command and Scripting Interpreter: PowerShell
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:2844
  - - C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\eNuXmIwkixzW" /XML "C:\Users\Admin\AppData\Local\Temp\tmp676A.tmp"
      4⤵
      System Location Discovery: System Language Discovery
      Scheduled Task/Job: Scheduled Task
      PID:1368
  - - C:\Users\Admin\AppData\Roaming\WindowsUpdates\outlooks.exe
      "C:\Users\Admin\AppData\Roaming\WindowsUpdates\outlooks.exe"
      4⤵
      Executes dropped EXE
      System Location Discovery: System Language Discovery
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of SetWindowsHookEx
      Suspicious use of WriteProcessMemory
      PID:1588
    - - C:\Windows\SysWOW64\schtasks.exe
        
        "schtasks" /create /tn "Outlooks" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\WindowsUpdates\outlooks.exe" /rl HIGHEST /f
        5⤵
        System Location Discovery: System Language Discovery
        Scheduled Task/Job: Scheduled Task
        
        PID:752

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

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

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmp1813.tmp

Filesize
1KB

MD5
3f42e739e4e5c8691406a049b52f741b

SHA1
266136d3b0738bc9ae754d2abe7820ce6bd843ee

SHA256
11f9b6e6978639d37b5b808b5cb494b394cdb1d6c0aa6db3c36641d3e94532d3

SHA512
05faf361da098e4554979cd289d1207d44725a6a26914beceba54de7ff921066a3e0362c810ea7f05d0fcaa71f4e2e80f57e8ed32c3c607cd9c1bbe7e9ef468e

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\d93f411851d7c929.customDestinations-ms

Filesize
7KB

MD5
4b8d7177a36db3638cf709d95c15bcad

SHA1
99129ad97bb04a114cbbab71ca9d8cdafd45e117

SHA256
835fdd8ecdf5ca2931af93fd2a527cd9c9f092b36caa45b1389aa399a9ec1aa9

SHA512
f41db8085d8534b445d64d48d6d7b815f889c8b49b03412d463095bda807932c3a5af8c122fcd6c38e540c078d3676563e22dd602b28bd0a4b9aac5916919842

Download Submit
C:\Users\Admin\AppData\Roaming\WindowsUpdates\outlooks.exe

Filesize
3.7MB

MD5
15f259b30ec72a5217144834f7f5b564

SHA1
baed3fe7d059a497f856e263431ccd3872ef1ea1

SHA256
01de053d9560d419f0b6c35dbddb1175eb1fd7a21450989332024b812d39c4c2

SHA512
5e1148a9cf8008b7c38d067ec34e5c3bc7255341d114476532f8111ea2c3e654eb70b0a439aaaea22543576f09b9cec269f9b3414a6a24fc54b89c7c677c5f47

Download Submit
memory/1588-61-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/1704-32-0x00000000744E0000-0x0000000074BCE000-memory.dmp

Filesize
6.9MB

Download
memory/1704-5-0x00000000744E0000-0x0000000074BCE000-memory.dmp

Filesize
6.9MB

Download
memory/1704-6-0x0000000007C50000-0x0000000007FB8000-memory.dmp

Filesize
3.4MB

Download
memory/1704-4-0x00000000744EE000-0x00000000744EF000-memory.dmp

Filesize
4KB

Download
memory/1704-3-0x00000000003B0000-0x00000000003C8000-memory.dmp

Filesize
96KB

Download
memory/1704-1-0x0000000000C40000-0x0000000000FEC000-memory.dmp

Filesize
3.7MB

Download
memory/1704-0-0x00000000744EE000-0x00000000744EF000-memory.dmp

Filesize
4KB

Download
memory/1704-2-0x00000000744E0000-0x0000000074BCE000-memory.dmp

Filesize
6.9MB

Download
memory/1964-40-0x0000000001010000-0x00000000013BC000-memory.dmp

Filesize
3.7MB

Download
memory/3044-28-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/3044-27-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/3044-25-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/3044-23-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/3044-19-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/3044-29-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/3044-31-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/3044-21-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download