quasar | 01de053d9560d419f0b6c35dbddb1175eb1fd7a21450989332024b812d39c4c2

Analysis

max time kernel
118s
max time network
122s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
03-12-2024 13:07

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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/2728-31-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar
behavioral1/memory/2728-29-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar
behavioral1/memory/2728-28-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar
behavioral1/memory/2728-25-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar
behavioral1/memory/2728-23-0x0000000000400000-0x0000000000724000-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
2056	powershell.exe
1920	powershell.exe
1932	powershell.exe
2272	powershell.exe

Executes dropped EXE 6 IoCs

Processes:

outlooks.exeoutlooks.exeoutlooks.exeoutlooks.exeoutlooks.exeoutlooks.exe

pid	Process
2456	outlooks.exe
2308	outlooks.exe
956	outlooks.exe
2192	outlooks.exe
2164	outlooks.exe
2176	outlooks.exe

Loads dropped DLL 1 IoCs

Processes:

Bestellung - 021224 - 901003637.exe

pid	Process
2728	Bestellung - 021224 - 901003637.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

Bestellung - 021224 - 901003637.exe

description	pid	Process	procid_target
PID 2524 set thread context of 2728	2524	Bestellung - 021224 - 901003637.exe	37

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 10 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:

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

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

Scheduled Task/Job: Scheduled Task 1 TTPs 3 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.exe

pid	Process
2716	schtasks.exe
2612	schtasks.exe
2104	schtasks.exe

Suspicious behavior: EnumeratesProcesses 14 IoCs

Processes:

powershell.exepowershell.exepowershell.exeoutlooks.exepowershell.exe

pid	Process
2056	powershell.exe
1920	powershell.exe
2272	powershell.exe
2456	outlooks.exe
2456	outlooks.exe
2456	outlooks.exe
2456	outlooks.exe
1932	powershell.exe
2456	outlooks.exe
2456	outlooks.exe
2456	outlooks.exe
2456	outlooks.exe
2456	outlooks.exe
2456	outlooks.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

Processes:

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

description	pid	Process
Token: SeDebugPrivilege	2056	powershell.exe
Token: SeDebugPrivilege	1920	powershell.exe
Token: SeDebugPrivilege	2728	Bestellung - 021224 - 901003637.exe
Token: SeDebugPrivilege	2272	powershell.exe
Token: SeDebugPrivilege	2456	outlooks.exe
Token: SeDebugPrivilege	1932	powershell.exe

Suspicious use of WriteProcessMemory 61 IoCs

Processes:

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

description	pid	Process	procid_target
PID 2524 wrote to memory of 2056	2524	Bestellung - 021224 - 901003637.exe	31
PID 2524 wrote to memory of 2056	2524	Bestellung - 021224 - 901003637.exe	31
PID 2524 wrote to memory of 2056	2524	Bestellung - 021224 - 901003637.exe	31
PID 2524 wrote to memory of 2056	2524	Bestellung - 021224 - 901003637.exe	31
PID 2524 wrote to memory of 1920	2524	Bestellung - 021224 - 901003637.exe	33
PID 2524 wrote to memory of 1920	2524	Bestellung - 021224 - 901003637.exe	33
PID 2524 wrote to memory of 1920	2524	Bestellung - 021224 - 901003637.exe	33
PID 2524 wrote to memory of 1920	2524	Bestellung - 021224 - 901003637.exe	33
PID 2524 wrote to memory of 2716	2524	Bestellung - 021224 - 901003637.exe	35
PID 2524 wrote to memory of 2716	2524	Bestellung - 021224 - 901003637.exe	35
PID 2524 wrote to memory of 2716	2524	Bestellung - 021224 - 901003637.exe	35
PID 2524 wrote to memory of 2716	2524	Bestellung - 021224 - 901003637.exe	35
PID 2524 wrote to memory of 2728	2524	Bestellung - 021224 - 901003637.exe	37
PID 2524 wrote to memory of 2728	2524	Bestellung - 021224 - 901003637.exe	37
PID 2524 wrote to memory of 2728	2524	Bestellung - 021224 - 901003637.exe	37
PID 2524 wrote to memory of 2728	2524	Bestellung - 021224 - 901003637.exe	37
PID 2524 wrote to memory of 2728	2524	Bestellung - 021224 - 901003637.exe	37
PID 2524 wrote to memory of 2728	2524	Bestellung - 021224 - 901003637.exe	37
PID 2524 wrote to memory of 2728	2524	Bestellung - 021224 - 901003637.exe	37
PID 2524 wrote to memory of 2728	2524	Bestellung - 021224 - 901003637.exe	37
PID 2524 wrote to memory of 2728	2524	Bestellung - 021224 - 901003637.exe	37
PID 2728 wrote to memory of 2612	2728	Bestellung - 021224 - 901003637.exe	38
PID 2728 wrote to memory of 2612	2728	Bestellung - 021224 - 901003637.exe	38
PID 2728 wrote to memory of 2612	2728	Bestellung - 021224 - 901003637.exe	38
PID 2728 wrote to memory of 2612	2728	Bestellung - 021224 - 901003637.exe	38
PID 2728 wrote to memory of 2456	2728	Bestellung - 021224 - 901003637.exe	40
PID 2728 wrote to memory of 2456	2728	Bestellung - 021224 - 901003637.exe	40
PID 2728 wrote to memory of 2456	2728	Bestellung - 021224 - 901003637.exe	40
PID 2728 wrote to memory of 2456	2728	Bestellung - 021224 - 901003637.exe	40
PID 2456 wrote to memory of 1932	2456	outlooks.exe	41
PID 2456 wrote to memory of 1932	2456	outlooks.exe	41
PID 2456 wrote to memory of 1932	2456	outlooks.exe	41
PID 2456 wrote to memory of 1932	2456	outlooks.exe	41
PID 2456 wrote to memory of 2272	2456	outlooks.exe	42
PID 2456 wrote to memory of 2272	2456	outlooks.exe	42
PID 2456 wrote to memory of 2272	2456	outlooks.exe	42
PID 2456 wrote to memory of 2272	2456	outlooks.exe	42
PID 2456 wrote to memory of 2104	2456	outlooks.exe	43
PID 2456 wrote to memory of 2104	2456	outlooks.exe	43
PID 2456 wrote to memory of 2104	2456	outlooks.exe	43
PID 2456 wrote to memory of 2104	2456	outlooks.exe	43
PID 2456 wrote to memory of 956	2456	outlooks.exe	47
PID 2456 wrote to memory of 956	2456	outlooks.exe	47
PID 2456 wrote to memory of 956	2456	outlooks.exe	47
PID 2456 wrote to memory of 956	2456	outlooks.exe	47
PID 2456 wrote to memory of 2308	2456	outlooks.exe	48
PID 2456 wrote to memory of 2308	2456	outlooks.exe	48
PID 2456 wrote to memory of 2308	2456	outlooks.exe	48
PID 2456 wrote to memory of 2308	2456	outlooks.exe	48
PID 2456 wrote to memory of 2164	2456	outlooks.exe	49
PID 2456 wrote to memory of 2164	2456	outlooks.exe	49
PID 2456 wrote to memory of 2164	2456	outlooks.exe	49
PID 2456 wrote to memory of 2164	2456	outlooks.exe	49
PID 2456 wrote to memory of 2192	2456	outlooks.exe	50
PID 2456 wrote to memory of 2192	2456	outlooks.exe	50
PID 2456 wrote to memory of 2192	2456	outlooks.exe	50
PID 2456 wrote to memory of 2192	2456	outlooks.exe	50
PID 2456 wrote to memory of 2176	2456	outlooks.exe	51
PID 2456 wrote to memory of 2176	2456	outlooks.exe	51
PID 2456 wrote to memory of 2176	2456	outlooks.exe	51
PID 2456 wrote to memory of 2176	2456	outlooks.exe	51

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:2524
- 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:2056
- 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:1920
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\eNuXmIwkixzW" /XML "C:\Users\Admin\AppData\Local\Temp\tmpE743.tmp"
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:2716
- 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:2728
- - 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:2612
- - C:\Users\Admin\AppData\Roaming\WindowsUpdates\outlooks.exe
    "C:\Users\Admin\AppData\Roaming\WindowsUpdates\outlooks.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:2456
  - - 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:2272
  - - C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\eNuXmIwkixzW" /XML "C:\Users\Admin\AppData\Local\Temp\tmp2942.tmp"
      4⤵
      System Location Discovery: System Language Discovery
      Scheduled Task/Job: Scheduled Task
      PID:2104
  - - C:\Users\Admin\AppData\Roaming\WindowsUpdates\outlooks.exe
      "C:\Users\Admin\AppData\Roaming\WindowsUpdates\outlooks.exe"
      4⤵
      Executes dropped EXE
      PID:956
  - - C:\Users\Admin\AppData\Roaming\WindowsUpdates\outlooks.exe
      "C:\Users\Admin\AppData\Roaming\WindowsUpdates\outlooks.exe"
      4⤵
      Executes dropped EXE
      PID:2308
  - - C:\Users\Admin\AppData\Roaming\WindowsUpdates\outlooks.exe
      "C:\Users\Admin\AppData\Roaming\WindowsUpdates\outlooks.exe"
      4⤵
      Executes dropped EXE
      PID:2164
  - - C:\Users\Admin\AppData\Roaming\WindowsUpdates\outlooks.exe
      "C:\Users\Admin\AppData\Roaming\WindowsUpdates\outlooks.exe"
      4⤵
      Executes dropped EXE
      PID:2192
  - - C:\Users\Admin\AppData\Roaming\WindowsUpdates\outlooks.exe
      "C:\Users\Admin\AppData\Roaming\WindowsUpdates\outlooks.exe"
      4⤵
      Executes dropped EXE
      PID:2176

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

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmpE743.tmp

Filesize
1KB

MD5
d55278e4148e33252f4e1be995add34b

SHA1
cad56df348e6bf31f6ce291372bed770375b0873

SHA256
aaaf3653ca512566eedb653f596447c0c190038d924e6673d2f301e2c013f093

SHA512
1aa727eec0d664f60dcd4742a5add10013671ce98c9bdafbb003200e0e4c6a619d82397093174b15c40a5e3cd45e952dc24a1457e0ba2d6573c3aa97caa2de5a

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\JADA0PJMSYBQ4URNNQWD.temp

Filesize
7KB

MD5
6df8dbebe31abe0aae325f953e7cba70

SHA1
9aca1bfdbac117511874ce3a7798711c3b17705c

SHA256
f7bac1fe3c95eb262a531f90233ec6510560c441992b5902df0cd76d55060325

SHA512
6e97374adb0234be9205cf8b9ef809197b689bd37dd7328683811b28e03c46bb24b131067abfc6591156ff6ddbda00ea10f7ef95f15620370a9fd7cce3120d2a

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

Filesize
3.7MB

MD5
15f259b30ec72a5217144834f7f5b564

SHA1
baed3fe7d059a497f856e263431ccd3872ef1ea1

SHA256
01de053d9560d419f0b6c35dbddb1175eb1fd7a21450989332024b812d39c4c2

SHA512
5e1148a9cf8008b7c38d067ec34e5c3bc7255341d114476532f8111ea2c3e654eb70b0a439aaaea22543576f09b9cec269f9b3414a6a24fc54b89c7c677c5f47

Download Submit
memory/2456-40-0x0000000000080000-0x000000000042C000-memory.dmp

Filesize
3.7MB

Download
memory/2524-1-0x0000000000EF0000-0x000000000129C000-memory.dmp

Filesize
3.7MB

Download
memory/2524-2-0x0000000074110000-0x00000000747FE000-memory.dmp

Filesize
6.9MB

Download
memory/2524-3-0x0000000000510000-0x0000000000528000-memory.dmp

Filesize
96KB

Download
memory/2524-4-0x000000007411E000-0x000000007411F000-memory.dmp

Filesize
4KB

Download
memory/2524-5-0x0000000074110000-0x00000000747FE000-memory.dmp

Filesize
6.9MB

Download
memory/2524-6-0x0000000007D00000-0x0000000008068000-memory.dmp

Filesize
3.4MB

Download
memory/2524-0-0x000000007411E000-0x000000007411F000-memory.dmp

Filesize
4KB

Download
memory/2524-32-0x0000000074110000-0x00000000747FE000-memory.dmp

Filesize
6.9MB

Download
memory/2728-21-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/2728-29-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/2728-28-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/2728-27-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2728-25-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/2728-23-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/2728-31-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/2728-20-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download