Analysis

  • max time kernel
    2687s
  • max time network
    2708s
  • platform
    windows10-1703_x64
  • resource
    win10-20240404-en
  • resource tags

    arch:x64arch:x86image:win10-20240404-enlocale:en-usos:windows10-1703-x64system
  • submitted
    11-05-2024 19:27

General

  • Target

    Krampus/Krampus/B1OdUv8CBH.exe

  • Size

    18.8MB

  • MD5

    c5df5afb4679cbea28de24ff9ed306a2

  • SHA1

    fe968a913c1377f0e85cc4c95afa3129a2f9ae22

  • SHA256

    a12756e652171e06da8133a7abe625316b3d352fc82ed8cf199f349b7de0c478

  • SHA512

    a4ddb32c744da55829823feb140c2c48612d442459ec76daf7ec0459327e8422222a380c53802c15b298cf122f1f86fe2891b2bf04732ef764d62fb182cd7e70

  • SSDEEP

    196608:EXi2sOT7HnJ+7CBgHcyCkaIH2kkoyhr5QXNDe6JaCPU8rblcRHrdcKZ5CRO2HACB:ci07we4+TB6zxJcRBdCrHxwwR

Malware Config

Extracted

Family

xworm

Attributes
  • Install_directory

    %ProgramData%

  • install_file

    USB.exe

  • pastebin_url

    https://pastebin.com/raw/a1kmrNub

Signatures

  • Detect Xworm Payload 2 IoCs
  • Xworm

    Xworm is a remote access trojan written in C#.

  • 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.

  • Drops startup file 2 IoCs
  • Executes dropped EXE 47 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs
  • Looks up external IP address via web service 1 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Enumerates physical storage devices 1 TTPs

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

  • Creates scheduled task(s) 1 TTPs 1 IoCs

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

  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 13 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of FindShellTrayWindow 2 IoCs
  • Suspicious use of SendNotifyMessage 1 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 14 IoCs
  • 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.

Processes

  • C:\Users\Admin\AppData\Local\Temp\Krampus\Krampus\B1OdUv8CBH.exe
    "C:\Users\Admin\AppData\Local\Temp\Krampus\Krampus\B1OdUv8CBH.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2132
    • C:\ProgramData\clientlol.exe
      "C:\ProgramData\clientlol.exe"
      2⤵
      • Drops startup file
      • Executes dropped EXE
      • Adds Run key to start application
      • Suspicious behavior: AddClipboardFormatListener
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: GetForegroundWindowSpam
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:836
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\ProgramData\clientlol.exe'
        3⤵
        • Command and Scripting Interpreter: PowerShell
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:3292
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'clientlol.exe'
        3⤵
        • Command and Scripting Interpreter: PowerShell
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:4288
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\ProgramData\svchost'
        3⤵
        • Command and Scripting Interpreter: PowerShell
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:2476
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'svchost'
        3⤵
        • Command and Scripting Interpreter: PowerShell
        • Suspicious behavior: EnumeratesProcesses
        PID:2620
      • C:\Windows\System32\schtasks.exe
        "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "svchost" /tr "C:\ProgramData\svchost"
        3⤵
        • Creates scheduled task(s)
        PID:4864
    • C:\ProgramData\KrampUI.exe
      "C:\ProgramData\KrampUI.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SendNotifyMessage
      PID:4384
  • C:\ProgramData\svchost
    C:\ProgramData\svchost
    1⤵
    • Executes dropped EXE
    PID:3952
  • C:\ProgramData\svchost
    C:\ProgramData\svchost
    1⤵
    • Executes dropped EXE
    PID:2084
  • C:\ProgramData\svchost
    C:\ProgramData\svchost
    1⤵
    • Executes dropped EXE
    PID:2288
  • C:\ProgramData\svchost
    C:\ProgramData\svchost
    1⤵
    • Executes dropped EXE
    PID:4188
  • C:\ProgramData\svchost
    C:\ProgramData\svchost
    1⤵
    • Executes dropped EXE
    PID:2500
  • C:\ProgramData\svchost
    C:\ProgramData\svchost
    1⤵
    • Executes dropped EXE
    PID:1104
  • C:\ProgramData\svchost
    C:\ProgramData\svchost
    1⤵
    • Executes dropped EXE
    PID:5072
  • C:\ProgramData\svchost
    C:\ProgramData\svchost
    1⤵
    • Executes dropped EXE
    PID:4780
  • C:\ProgramData\svchost
    C:\ProgramData\svchost
    1⤵
    • Executes dropped EXE
    PID:4204
  • C:\ProgramData\svchost
    C:\ProgramData\svchost
    1⤵
    • Executes dropped EXE
    PID:2620
  • C:\ProgramData\svchost
    C:\ProgramData\svchost
    1⤵
    • Executes dropped EXE
    PID:3332
  • C:\ProgramData\svchost
    C:\ProgramData\svchost
    1⤵
    • Executes dropped EXE
    PID:4648
  • C:\ProgramData\svchost
    C:\ProgramData\svchost
    1⤵
    • Executes dropped EXE
    PID:2056
  • C:\ProgramData\svchost
    C:\ProgramData\svchost
    1⤵
    • Executes dropped EXE
    PID:772
  • C:\ProgramData\svchost
    C:\ProgramData\svchost
    1⤵
    • Executes dropped EXE
    PID:224
  • C:\ProgramData\svchost
    C:\ProgramData\svchost
    1⤵
    • Executes dropped EXE
    PID:936
  • C:\ProgramData\svchost
    C:\ProgramData\svchost
    1⤵
    • Executes dropped EXE
    PID:4028
  • C:\ProgramData\svchost
    C:\ProgramData\svchost
    1⤵
    • Executes dropped EXE
    PID:5100
  • C:\ProgramData\svchost
    C:\ProgramData\svchost
    1⤵
    • Executes dropped EXE
    PID:2076
  • C:\ProgramData\svchost
    C:\ProgramData\svchost
    1⤵
    • Executes dropped EXE
    PID:2248
  • C:\ProgramData\svchost
    C:\ProgramData\svchost
    1⤵
    • Executes dropped EXE
    PID:2864
  • C:\ProgramData\svchost
    C:\ProgramData\svchost
    1⤵
    • Executes dropped EXE
    PID:3976
  • C:\ProgramData\svchost
    C:\ProgramData\svchost
    1⤵
    • Executes dropped EXE
    PID:3020
  • C:\ProgramData\svchost
    C:\ProgramData\svchost
    1⤵
    • Executes dropped EXE
    PID:228
  • C:\ProgramData\svchost
    C:\ProgramData\svchost
    1⤵
    • Executes dropped EXE
    PID:4612
  • C:\ProgramData\svchost
    C:\ProgramData\svchost
    1⤵
    • Executes dropped EXE
    PID:2376
  • C:\ProgramData\svchost
    C:\ProgramData\svchost
    1⤵
    • Executes dropped EXE
    PID:2500
  • C:\ProgramData\svchost
    C:\ProgramData\svchost
    1⤵
    • Executes dropped EXE
    PID:2948
  • C:\ProgramData\svchost
    C:\ProgramData\svchost
    1⤵
    • Executes dropped EXE
    PID:3848
  • C:\ProgramData\svchost
    C:\ProgramData\svchost
    1⤵
    • Executes dropped EXE
    PID:3788
  • C:\ProgramData\svchost
    C:\ProgramData\svchost
    1⤵
    • Executes dropped EXE
    PID:2340
  • C:\ProgramData\svchost
    C:\ProgramData\svchost
    1⤵
    • Executes dropped EXE
    PID:1844
  • C:\ProgramData\svchost
    C:\ProgramData\svchost
    1⤵
    • Executes dropped EXE
    PID:1100
  • C:\ProgramData\svchost
    C:\ProgramData\svchost
    1⤵
    • Executes dropped EXE
    PID:3960
  • C:\ProgramData\svchost
    C:\ProgramData\svchost
    1⤵
    • Executes dropped EXE
    PID:1232
  • C:\ProgramData\svchost
    C:\ProgramData\svchost
    1⤵
    • Executes dropped EXE
    PID:1924
  • C:\ProgramData\svchost
    C:\ProgramData\svchost
    1⤵
    • Executes dropped EXE
    PID:4600
  • C:\ProgramData\svchost
    C:\ProgramData\svchost
    1⤵
    • Executes dropped EXE
    PID:4756
  • C:\ProgramData\svchost
    C:\ProgramData\svchost
    1⤵
    • Executes dropped EXE
    PID:3952
  • C:\ProgramData\svchost
    C:\ProgramData\svchost
    1⤵
    • Executes dropped EXE
    PID:4728
  • C:\ProgramData\svchost
    C:\ProgramData\svchost
    1⤵
    • Executes dropped EXE
    PID:5112
  • C:\ProgramData\svchost
    C:\ProgramData\svchost
    1⤵
    • Executes dropped EXE
    PID:236
  • C:\ProgramData\svchost
    C:\ProgramData\svchost
    1⤵
    • Executes dropped EXE
    PID:976
  • C:\ProgramData\svchost
    C:\ProgramData\svchost
    1⤵
    • Executes dropped EXE
    PID:2836
  • C:\ProgramData\svchost
    C:\ProgramData\svchost
    1⤵
    • Executes dropped EXE
    PID:2212

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\ProgramData\KrampUI.exe

    Filesize

    17.3MB

    MD5

    ec02c6962ff0994f0dbc06133cb32f28

    SHA1

    1084bbf4c67fea18b2dd0232ad196f97ea17438c

    SHA256

    9663260edf06c3b9116a649af4c9fffa22f1bb3811f3e73e0f8fd6e3ba997565

    SHA512

    8d00d5f21209bb7ffa24ee7717db4e9294c720a62d50ee416ab6e6e6520afde1d9cacc3c364c2c4d81d3eb565efba29f9e815d384774ba0de0671496952418f6

  • C:\ProgramData\clientlol.exe

    Filesize

    1.5MB

    MD5

    da4f713eda91ee257714127d761852a3

    SHA1

    5901870facef99c9c850b141e8f8339721e932e4

    SHA256

    9d27a2b70745480a42b83777ea3aa0399c63a55c6d9b699d67f1e95f7605ebe1

    SHA512

    9964eca29700aefa97febdbca4e829a64ec6fd050d49c720f04963fab831b528319c9b3b054f36093ef9dc7236a681fba02f1f988ec19194f124d7a75abcddf7

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

    Filesize

    3KB

    MD5

    8592ba100a78835a6b94d5949e13dfc1

    SHA1

    63e901200ab9a57c7dd4c078d7f75dcd3b357020

    SHA256

    fdd7d9def6f9f0c0f2e60dbc8a2d1999071cd7d3095e9e087bb1cda7a614ac3c

    SHA512

    87f98e6cb61b2a2a7d65710c4d33881d89715eb7a06e00d492259f35c3902498baabffc5886be0ec5a14312ad4c262e3fc40cd3a5cb91701af0fb229726b88c3

  • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\svchost.log

    Filesize

    654B

    MD5

    16c5fce5f7230eea11598ec11ed42862

    SHA1

    75392d4824706090f5e8907eee1059349c927600

    SHA256

    87ba77c13905298acbac72be90949c4fe0755b6eff9777615aa37f252515f151

    SHA512

    153edd6da59beea6cc411ed7383c32916425d6ebb65f04c65aab7c1d6b25443d143aa8449aa92149de0ad8a975f6ecaa60f9f7574536eec6b38fe5fd3a6c6adc

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

    Filesize

    1KB

    MD5

    a08b58e362a82bcfee50f1654d2b0e89

    SHA1

    a782f09186c018952619cc93512d111461b896c8

    SHA256

    27e19ca079d3312a08e3ad48f36449ce653b7717e7e9fdb2bd2474be9db3e37d

    SHA512

    a6356440753029adf0168a124b88cf90013864492e04e6eee7cc81aea9352c598ba367245844769b54d5189baae5bb63ecb579d6a9335b30a7816e8325e1e57c

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

    Filesize

    1KB

    MD5

    187f22b08c59a721de9a7ac509648a52

    SHA1

    0b21ba2c6fd073d20e680d49a2e36237412e528c

    SHA256

    02224d288e533dfc482eb8abb5f945fca05e73f5a9bb8092c714eefb03885762

    SHA512

    9f21defacf1d0cbe01fa65e639e4dcfb16d6ffb17443307bbff76dc61f5a42f1c6e4202fbd9682e042d45c678dad8e8675d688f6c06f3c3cde1d4875f141c922

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

    Filesize

    1KB

    MD5

    fa2fd96a0cefb3443e3d5d36dcf49bdb

    SHA1

    62f89c94f6ef4b9f4cc1ffccf4b9e87e36d81755

    SHA256

    9269962ccbd30f9caed70951584ae74b4a78fe7c949e7d6d174d80633dd16924

    SHA512

    1e36cb55b41512329cf3cc33ed84f80bb6eccc94f015ec5ee84f1dbb604f9ea18d4bc7144f07a406d24e02974fc04cf51181884f9df3285fcd9e8a36d36b06b4

  • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_3pvsjlq4.arh.ps1

    Filesize

    1B

    MD5

    c4ca4238a0b923820dcc509a6f75849b

    SHA1

    356a192b7913b04c54574d18c28d46e6395428ab

    SHA256

    6b86b273ff34fce19d6b804eff5a3f5747ada4eaa22f1d49c01e52ddb7875b4b

    SHA512

    4dff4ea340f0a823f15d3f4f01ab62eae0e5da579ccb851f8db9dfe84c58b2b37b89903a740e1ee172da793a6e79d560e5f7f9bd058a12a280433ed6fa46510a

  • memory/836-8-0x00007FFC5D580000-0x00007FFC5DF6C000-memory.dmp

    Filesize

    9.9MB

  • memory/836-15-0x00007FFC5D580000-0x00007FFC5DF6C000-memory.dmp

    Filesize

    9.9MB

  • memory/836-7-0x0000000000290000-0x00000000002A8000-memory.dmp

    Filesize

    96KB

  • memory/836-194-0x00007FFC5D580000-0x00007FFC5DF6C000-memory.dmp

    Filesize

    9.9MB

  • memory/836-195-0x00007FFC5D580000-0x00007FFC5DF6C000-memory.dmp

    Filesize

    9.9MB

  • memory/2132-0-0x00007FFC5D583000-0x00007FFC5D584000-memory.dmp

    Filesize

    4KB

  • memory/2132-1-0x0000000000F30000-0x00000000021FE000-memory.dmp

    Filesize

    18.8MB

  • memory/3292-23-0x00000244A1DA0000-0x00000244A1E16000-memory.dmp

    Filesize

    472KB

  • memory/3292-20-0x00000244896A0000-0x00000244896C2000-memory.dmp

    Filesize

    136KB