Analysis

  • max time kernel
    150s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    03-12-2024 17:04

General

  • Target

    Bestellung-021224-901003637.exe

  • Size

    3.7MB

  • MD5

    15f259b30ec72a5217144834f7f5b564

  • SHA1

    baed3fe7d059a497f856e263431ccd3872ef1ea1

  • SHA256

    01de053d9560d419f0b6c35dbddb1175eb1fd7a21450989332024b812d39c4c2

  • SHA512

    5e1148a9cf8008b7c38d067ec34e5c3bc7255341d114476532f8111ea2c3e654eb70b0a439aaaea22543576f09b9cec269f9b3414a6a24fc54b89c7c677c5f47

  • SSDEEP

    98304:ZrAsTIZbqqBQjwske/pCT66UNYekeWY0CE9:ZcCSL0ke/pO5ekeWtCE9

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

DAVID

C2

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.

  • Quasar family
  • Quasar payload 1 IoCs
  • 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.

  • Checks computer location settings 2 TTPs 2 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Executes dropped EXE 2 IoCs
  • Suspicious use of SetThreadContext 2 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • 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.

  • Scheduled Task/Job: Scheduled Task 1 TTPs 4 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 10 IoCs
  • Suspicious use of AdjustPrivilegeToken 7 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 46 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Bestellung-021224-901003637.exe
    "C:\Users\Admin\AppData\Local\Temp\Bestellung-021224-901003637.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1816
    • 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:3244
    • 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:4844
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\eNuXmIwkixzW" /XML "C:\Users\Admin\AppData\Local\Temp\tmpE119.tmp"
      2⤵
      • System Location Discovery: System Language Discovery
      • Scheduled Task/Job: Scheduled Task
      PID:4004
    • C:\Users\Admin\AppData\Local\Temp\Bestellung-021224-901003637.exe
      "C:\Users\Admin\AppData\Local\Temp\Bestellung-021224-901003637.exe"
      2⤵
        PID:2936
      • C:\Users\Admin\AppData\Local\Temp\Bestellung-021224-901003637.exe
        "C:\Users\Admin\AppData\Local\Temp\Bestellung-021224-901003637.exe"
        2⤵
        • System Location Discovery: System Language Discovery
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:3036
        • 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:1572
        • C:\Users\Admin\AppData\Roaming\WindowsUpdates\outlooks.exe
          "C:\Users\Admin\AppData\Roaming\WindowsUpdates\outlooks.exe"
          3⤵
          • Checks computer location settings
          • Executes dropped EXE
          • Suspicious use of SetThreadContext
          • System Location Discovery: System Language Discovery
          • Suspicious use of WriteProcessMemory
          PID:1992
          • 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:436
          • 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:4496
          • C:\Windows\SysWOW64\schtasks.exe
            "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\eNuXmIwkixzW" /XML "C:\Users\Admin\AppData\Local\Temp\tmp2F58.tmp"
            4⤵
            • System Location Discovery: System Language Discovery
            • Scheduled Task/Job: Scheduled Task
            PID:4160
          • 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:3444
            • 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:3936

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

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    Downloads

    • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\Bestellung-021224-901003637.exe.log

      Filesize

      1KB

      MD5

      8ec831f3e3a3f77e4a7b9cd32b48384c

      SHA1

      d83f09fd87c5bd86e045873c231c14836e76a05c

      SHA256

      7667e538030e3f8ce2886e47a01af24cb0ea70528b1e821c5d8832c5076cb982

      SHA512

      26bffa2406b66368bd412bf25869a792631455645992cdcade2dbc13a2e56fb546414a6a9223b94c96c38d89187add6678d4779a88b38b0c9e36be8527b213c3

    • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\powershell.exe.log

      Filesize

      2KB

      MD5

      968cb9309758126772781b83adb8a28f

      SHA1

      8da30e71accf186b2ba11da1797cf67f8f78b47c

      SHA256

      92099c10776bb7e3f2a8d1b82d4d40d0c4627e4f1bf754a6e58dfd2c2e97042a

      SHA512

      4bd50732f8af4d688d95999bddfd296115d7033ddc38f86c9fb1f47fde202bffa27e9088bebcaa3064ca946af2f5c1ca6cbde49d0907f0005c7ab42874515dd3

    • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

      Filesize

      18KB

      MD5

      6e7a006342e65b1574d62a1dba15baa8

      SHA1

      d752950dfa7c0e523a06bd0e2542ac29b55015c5

      SHA256

      4b8422f4bbea83a1a3ce560336c84d595bd3deff8bc77b0688e0a3789c2593b4

      SHA512

      b47ff39f0e24a3a5efc2fdc7d8e43465c3c06068bd491ca512b69c8d5b25159d16fcf46e1313b73d7291f90b16c87774062a2d0aed8ae3abfcb39e983faa8b20

    • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

      Filesize

      18KB

      MD5

      9ff698ebf4064f020e9b907fda78dca0

      SHA1

      1f50f219a18aebe2ecbd66776797466b04bfd206

      SHA256

      d4bf6e4b5f0c32a98c714b508fb10422333e9b095902646347a348dbb0d32022

      SHA512

      cad614dcf6cc8c83d713f2035a8292849df42ae7322ba2b9d70388a10e8859cf9edac2a2304295168caa8571a1d28b7e49e53b38ddee71c22486f33adfd88f9a

    • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_n24jjnti.oa4.ps1

      Filesize

      60B

      MD5

      d17fe0a3f47be24a6453e9ef58c94641

      SHA1

      6ab83620379fc69f80c0242105ddffd7d98d5d9d

      SHA256

      96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

      SHA512

      5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

    • C:\Users\Admin\AppData\Local\Temp\tmpE119.tmp

      Filesize

      1KB

      MD5

      0f5159a38dcc30104456db898394a260

      SHA1

      8d5c8e4ce09a05d863583ab6c321fda637f2a5a0

      SHA256

      c9cd13ad908fcaa476f54a5211add6f8f13bf63533ee122b1348034c25503ca9

      SHA512

      e089fd2183780853bc60e798b58b2cec3e3863218f887d3e0ebc29cc1d3667ded6ef545d393f422432931dde4319de33c50631d9e2b7deddc0625f7989516e4b

    • C:\Users\Admin\AppData\Roaming\WindowsUpdates\outlooks.exe

      Filesize

      3.7MB

      MD5

      15f259b30ec72a5217144834f7f5b564

      SHA1

      baed3fe7d059a497f856e263431ccd3872ef1ea1

      SHA256

      01de053d9560d419f0b6c35dbddb1175eb1fd7a21450989332024b812d39c4c2

      SHA512

      5e1148a9cf8008b7c38d067ec34e5c3bc7255341d114476532f8111ea2c3e654eb70b0a439aaaea22543576f09b9cec269f9b3414a6a24fc54b89c7c677c5f47

    • memory/436-133-0x0000000075100000-0x000000007514C000-memory.dmp

      Filesize

      304KB

    • memory/1816-10-0x0000000007020000-0x00000000070BC000-memory.dmp

      Filesize

      624KB

    • memory/1816-9-0x0000000006BF0000-0x0000000006F58000-memory.dmp

      Filesize

      3.4MB

    • memory/1816-8-0x0000000074870000-0x0000000075020000-memory.dmp

      Filesize

      7.7MB

    • memory/1816-7-0x000000007487E000-0x000000007487F000-memory.dmp

      Filesize

      4KB

    • memory/1816-6-0x00000000081F0000-0x0000000008208000-memory.dmp

      Filesize

      96KB

    • memory/1816-5-0x0000000003350000-0x000000000335A000-memory.dmp

      Filesize

      40KB

    • memory/1816-4-0x0000000074870000-0x0000000075020000-memory.dmp

      Filesize

      7.7MB

    • memory/1816-0-0x000000007487E000-0x000000007487F000-memory.dmp

      Filesize

      4KB

    • memory/1816-3-0x0000000007EE0000-0x0000000007F72000-memory.dmp

      Filesize

      584KB

    • memory/1816-50-0x0000000074870000-0x0000000075020000-memory.dmp

      Filesize

      7.7MB

    • memory/1816-2-0x00000000083F0000-0x0000000008994000-memory.dmp

      Filesize

      5.6MB

    • memory/1816-1-0x0000000000D80000-0x000000000112C000-memory.dmp

      Filesize

      3.7MB

    • memory/3036-47-0x0000000000400000-0x0000000000724000-memory.dmp

      Filesize

      3.1MB

    • memory/3244-31-0x0000000074870000-0x0000000075020000-memory.dmp

      Filesize

      7.7MB

    • memory/3244-74-0x0000000006F30000-0x0000000006FD3000-memory.dmp

      Filesize

      652KB

    • memory/3244-87-0x0000000007380000-0x000000000739A000-memory.dmp

      Filesize

      104KB

    • memory/3244-25-0x0000000005780000-0x0000000005AD4000-memory.dmp

      Filesize

      3.3MB

    • memory/3244-86-0x0000000007280000-0x0000000007294000-memory.dmp

      Filesize

      80KB

    • memory/3244-15-0x0000000002420000-0x0000000002456000-memory.dmp

      Filesize

      216KB

    • memory/3244-88-0x0000000007360000-0x0000000007368000-memory.dmp

      Filesize

      32KB

    • memory/3244-16-0x0000000074870000-0x0000000075020000-memory.dmp

      Filesize

      7.7MB

    • memory/3244-95-0x0000000074870000-0x0000000075020000-memory.dmp

      Filesize

      7.7MB

    • memory/3244-17-0x0000000004FE0000-0x0000000005608000-memory.dmp

      Filesize

      6.2MB

    • memory/3244-64-0x000000006FE70000-0x000000006FEBC000-memory.dmp

      Filesize

      304KB

    • memory/3244-18-0x0000000074870000-0x0000000075020000-memory.dmp

      Filesize

      7.7MB

    • memory/3444-145-0x0000000006B70000-0x0000000006BC0000-memory.dmp

      Filesize

      320KB

    • memory/3444-155-0x0000000008430000-0x000000000846C000-memory.dmp

      Filesize

      240KB

    • memory/3444-144-0x0000000007030000-0x0000000007648000-memory.dmp

      Filesize

      6.1MB

    • memory/3444-154-0x00000000083D0000-0x00000000083E2000-memory.dmp

      Filesize

      72KB

    • memory/3444-147-0x0000000006DE0000-0x0000000006E92000-memory.dmp

      Filesize

      712KB

    • memory/4496-134-0x0000000007130000-0x00000000071D3000-memory.dmp

      Filesize

      652KB

    • memory/4496-123-0x0000000075100000-0x000000007514C000-memory.dmp

      Filesize

      304KB

    • memory/4496-122-0x0000000005FE0000-0x000000000602C000-memory.dmp

      Filesize

      304KB

    • memory/4496-107-0x0000000005880000-0x0000000005BD4000-memory.dmp

      Filesize

      3.3MB

    • memory/4496-148-0x00000000074B0000-0x00000000074C4000-memory.dmp

      Filesize

      80KB

    • memory/4496-146-0x0000000007470000-0x0000000007481000-memory.dmp

      Filesize

      68KB

    • memory/4844-21-0x0000000005530000-0x0000000005596000-memory.dmp

      Filesize

      408KB

    • memory/4844-85-0x0000000007AA0000-0x0000000007AAE000-memory.dmp

      Filesize

      56KB

    • memory/4844-84-0x0000000007A70000-0x0000000007A81000-memory.dmp

      Filesize

      68KB

    • memory/4844-94-0x0000000074870000-0x0000000075020000-memory.dmp

      Filesize

      7.7MB

    • memory/4844-83-0x0000000007AF0000-0x0000000007B86000-memory.dmp

      Filesize

      600KB

    • memory/4844-82-0x00000000078E0000-0x00000000078EA000-memory.dmp

      Filesize

      40KB

    • memory/4844-80-0x0000000007EB0000-0x000000000852A000-memory.dmp

      Filesize

      6.5MB

    • memory/4844-81-0x0000000007870000-0x000000000788A000-memory.dmp

      Filesize

      104KB

    • memory/4844-63-0x0000000006B00000-0x0000000006B1E000-memory.dmp

      Filesize

      120KB

    • memory/4844-52-0x0000000006B40000-0x0000000006B72000-memory.dmp

      Filesize

      200KB

    • memory/4844-53-0x000000006FE70000-0x000000006FEBC000-memory.dmp

      Filesize

      304KB

    • memory/4844-48-0x00000000068B0000-0x00000000068FC000-memory.dmp

      Filesize

      304KB

    • memory/4844-46-0x0000000006550000-0x000000000656E000-memory.dmp

      Filesize

      120KB

    • memory/4844-45-0x0000000074870000-0x0000000075020000-memory.dmp

      Filesize

      7.7MB

    • memory/4844-24-0x0000000074870000-0x0000000075020000-memory.dmp

      Filesize

      7.7MB

    • memory/4844-19-0x0000000005490000-0x00000000054B2000-memory.dmp

      Filesize

      136KB

    • memory/4844-20-0x0000000074870000-0x0000000075020000-memory.dmp

      Filesize

      7.7MB

    • memory/4844-23-0x00000000055A0000-0x0000000005606000-memory.dmp

      Filesize

      408KB