quasar | c63218f9ea9fcd899216ecf7f802c4c7c94c633d8c404ecf9be30adbdee00e5f

Analysis

max time kernel
147s
max time network
148s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
03-12-2024 09:01

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General

Target

Zamówienie - 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/2860-23-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar
behavioral1/memory/2860-28-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar
behavioral1/memory/2860-30-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar
behavioral1/memory/2860-29-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar
behavioral1/memory/2860-25-0x0000000000400000-0x0000000000724000-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
1900	powershell.exe
2256	powershell.exe
2320	powershell.exe
2336	powershell.exe

Executes dropped EXE 2 IoCs

Processes:

outlooks.exeoutlooks.exe

pid	Process
1440	outlooks.exe
2744	outlooks.exe

Loads dropped DLL 1 IoCs

Processes:

Zamówienie - 021224 - 901003637.exe

pid	Process
2860	Zamówienie - 021224 - 901003637.exe

Suspicious use of SetThreadContext 2 IoCs

Processes:

Zamówienie - 021224 - 901003637.exeoutlooks.exe

description	pid	Process	procid_target
PID 3044 set thread context of 2860	3044	Zamówienie - 021224 - 901003637.exe	37
PID 1440 set thread context of 2744	1440	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:

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

description	ioc	Process
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	Zamówienie - 021224 - 901003637.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	Zamówienie - 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	outlooks.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
2344	schtasks.exe
2512	schtasks.exe
2640	schtasks.exe
3016	schtasks.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

powershell.exepowershell.exepowershell.exepowershell.exe

pid	Process
2256	powershell.exe
1900	powershell.exe
2320	powershell.exe
2336	powershell.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

Processes:

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

description	pid	Process
Token: SeDebugPrivilege	2256	powershell.exe
Token: SeDebugPrivilege	1900	powershell.exe
Token: SeDebugPrivilege	2860	Zamówienie - 021224 - 901003637.exe
Token: SeDebugPrivilege	2320	powershell.exe
Token: SeDebugPrivilege	2336	powershell.exe
Token: SeDebugPrivilege	2744	outlooks.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

outlooks.exe

pid	Process
2744	outlooks.exe

Suspicious use of WriteProcessMemory 54 IoCs

Processes:

Zamówienie - 021224 - 901003637.exeZamówienie - 021224 - 901003637.exeoutlooks.exeoutlooks.exe

description	pid	Process	procid_target
PID 3044 wrote to memory of 1900	3044	Zamówienie - 021224 - 901003637.exe	31
PID 3044 wrote to memory of 1900	3044	Zamówienie - 021224 - 901003637.exe	31
PID 3044 wrote to memory of 1900	3044	Zamówienie - 021224 - 901003637.exe	31
PID 3044 wrote to memory of 1900	3044	Zamówienie - 021224 - 901003637.exe	31
PID 3044 wrote to memory of 2256	3044	Zamówienie - 021224 - 901003637.exe	33
PID 3044 wrote to memory of 2256	3044	Zamówienie - 021224 - 901003637.exe	33
PID 3044 wrote to memory of 2256	3044	Zamówienie - 021224 - 901003637.exe	33
PID 3044 wrote to memory of 2256	3044	Zamówienie - 021224 - 901003637.exe	33
PID 3044 wrote to memory of 2640	3044	Zamówienie - 021224 - 901003637.exe	35
PID 3044 wrote to memory of 2640	3044	Zamówienie - 021224 - 901003637.exe	35
PID 3044 wrote to memory of 2640	3044	Zamówienie - 021224 - 901003637.exe	35
PID 3044 wrote to memory of 2640	3044	Zamówienie - 021224 - 901003637.exe	35
PID 3044 wrote to memory of 2860	3044	Zamówienie - 021224 - 901003637.exe	37
PID 3044 wrote to memory of 2860	3044	Zamówienie - 021224 - 901003637.exe	37
PID 3044 wrote to memory of 2860	3044	Zamówienie - 021224 - 901003637.exe	37
PID 3044 wrote to memory of 2860	3044	Zamówienie - 021224 - 901003637.exe	37
PID 3044 wrote to memory of 2860	3044	Zamówienie - 021224 - 901003637.exe	37
PID 3044 wrote to memory of 2860	3044	Zamówienie - 021224 - 901003637.exe	37
PID 3044 wrote to memory of 2860	3044	Zamówienie - 021224 - 901003637.exe	37
PID 3044 wrote to memory of 2860	3044	Zamówienie - 021224 - 901003637.exe	37
PID 3044 wrote to memory of 2860	3044	Zamówienie - 021224 - 901003637.exe	37
PID 2860 wrote to memory of 3016	2860	Zamówienie - 021224 - 901003637.exe	38
PID 2860 wrote to memory of 3016	2860	Zamówienie - 021224 - 901003637.exe	38
PID 2860 wrote to memory of 3016	2860	Zamówienie - 021224 - 901003637.exe	38
PID 2860 wrote to memory of 3016	2860	Zamówienie - 021224 - 901003637.exe	38
PID 2860 wrote to memory of 1440	2860	Zamówienie - 021224 - 901003637.exe	40
PID 2860 wrote to memory of 1440	2860	Zamówienie - 021224 - 901003637.exe	40
PID 2860 wrote to memory of 1440	2860	Zamówienie - 021224 - 901003637.exe	40
PID 2860 wrote to memory of 1440	2860	Zamówienie - 021224 - 901003637.exe	40
PID 1440 wrote to memory of 2320	1440	outlooks.exe	41
PID 1440 wrote to memory of 2320	1440	outlooks.exe	41
PID 1440 wrote to memory of 2320	1440	outlooks.exe	41
PID 1440 wrote to memory of 2320	1440	outlooks.exe	41
PID 1440 wrote to memory of 2336	1440	outlooks.exe	42
PID 1440 wrote to memory of 2336	1440	outlooks.exe	42
PID 1440 wrote to memory of 2336	1440	outlooks.exe	42
PID 1440 wrote to memory of 2336	1440	outlooks.exe	42
PID 1440 wrote to memory of 2344	1440	outlooks.exe	44
PID 1440 wrote to memory of 2344	1440	outlooks.exe	44
PID 1440 wrote to memory of 2344	1440	outlooks.exe	44
PID 1440 wrote to memory of 2344	1440	outlooks.exe	44
PID 1440 wrote to memory of 2744	1440	outlooks.exe	47
PID 1440 wrote to memory of 2744	1440	outlooks.exe	47
PID 1440 wrote to memory of 2744	1440	outlooks.exe	47
PID 1440 wrote to memory of 2744	1440	outlooks.exe	47
PID 1440 wrote to memory of 2744	1440	outlooks.exe	47
PID 1440 wrote to memory of 2744	1440	outlooks.exe	47
PID 1440 wrote to memory of 2744	1440	outlooks.exe	47
PID 1440 wrote to memory of 2744	1440	outlooks.exe	47
PID 1440 wrote to memory of 2744	1440	outlooks.exe	47
PID 2744 wrote to memory of 2512	2744	outlooks.exe	48
PID 2744 wrote to memory of 2512	2744	outlooks.exe	48
PID 2744 wrote to memory of 2512	2744	outlooks.exe	48
PID 2744 wrote to memory of 2512	2744	outlooks.exe	48

C:\Users\Admin\AppData\Local\Temp\Zamówienie - 021224 - 901003637.exe
"C:\Users\Admin\AppData\Local\Temp\Zamówienie - 021224 - 901003637.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3044
- 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\Zamówienie - 021224 - 901003637.exe"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1900
- 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:2256
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\eNuXmIwkixzW" /XML "C:\Users\Admin\AppData\Local\Temp\tmpF9AA.tmp"
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:2640
- C:\Users\Admin\AppData\Local\Temp\Zamówienie - 021224 - 901003637.exe
  "C:\Users\Admin\AppData\Local\Temp\Zamówienie - 021224 - 901003637.exe"
  2⤵
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2860
- - 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:3016
- - 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:1440
  - - 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:2320
  - - 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:2336
  - - C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\eNuXmIwkixzW" /XML "C:\Users\Admin\AppData\Local\Temp\tmp3EC5.tmp"
      4⤵
      System Location Discovery: System Language Discovery
      Scheduled Task/Job: Scheduled Task
      PID:2344
  - - 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:2744
    - - 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:2512

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\tmpF9AA.tmp

Filesize
1KB

MD5
940b72f92a4f8abcc42d6fe6528687da

SHA1
f736020f92909b2d922be96f33383c4a21be3a14

SHA256
619c195cb8e11ee396c09da7edea15d27545fe2f6f7e46b2b4778e3576141afc

SHA512
5775948182e70f3e8775df57badc6b6334271a464403aa95588cc9e8237850205cdecdd0de03595c3717e719548494cf17cb085b3d6163d8fbd5f3e2385fec4d

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

Filesize
7KB

MD5
da34f3ba0f477c90aebf48b258a0c981

SHA1
79fea40438b17a24c2676c9c559a34d954d0ae4e

SHA256
f6c4f09440065aafd1c94f4d93682fcda0fe8e733666896210bb3320caeca8c4

SHA512
6e04ab506e87d0fa4c1182757cfaca65be77101c28805ad9f437b8930dc6d0eb3dc2bfdb6ecbea751ede675bc16185ea1d0c408ca1b77dfae51862f0f19c5e76

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

Filesize
3.7MB

MD5
15f259b30ec72a5217144834f7f5b564

SHA1
baed3fe7d059a497f856e263431ccd3872ef1ea1

SHA256
01de053d9560d419f0b6c35dbddb1175eb1fd7a21450989332024b812d39c4c2

SHA512
5e1148a9cf8008b7c38d067ec34e5c3bc7255341d114476532f8111ea2c3e654eb70b0a439aaaea22543576f09b9cec269f9b3414a6a24fc54b89c7c677c5f47

Download Submit
memory/1440-39-0x0000000000DE0000-0x000000000118C000-memory.dmp

Filesize
3.7MB

Download
memory/2744-60-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2860-27-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2860-28-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/2860-25-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/2860-29-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/2860-19-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/2860-21-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/2860-23-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/2860-30-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/3044-6-0x0000000007B70000-0x0000000007ED8000-memory.dmp

Filesize
3.4MB

Download
memory/3044-4-0x000000007454E000-0x000000007454F000-memory.dmp

Filesize
4KB

Download
memory/3044-0-0x000000007454E000-0x000000007454F000-memory.dmp

Filesize
4KB

Download
memory/3044-5-0x0000000074540000-0x0000000074C2E000-memory.dmp

Filesize
6.9MB

Download
memory/3044-31-0x0000000074540000-0x0000000074C2E000-memory.dmp

Filesize
6.9MB

Download
memory/3044-3-0x0000000000570000-0x0000000000588000-memory.dmp

Filesize
96KB

Download
memory/3044-2-0x0000000074540000-0x0000000074C2E000-memory.dmp

Filesize
6.9MB

Download
memory/3044-1-0x00000000011C0000-0x000000000156C000-memory.dmp

Filesize
3.7MB

Download