Windows 7 deprecation

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Analysis

  • max time kernel
    618s
  • max time network
    438s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    26/11/2024, 17:14

General

  • Target

    PepperX (1).exe

  • Size

    146KB

  • MD5

    39c9477cf131ca5ccc05c8871c0e10e6

  • SHA1

    07b2581b2cb41053d09c4bb896aaabc1d28f2a7b

  • SHA256

    939281eac1c6e5aa2e4238a1e545e67b2609c15f517474b2a5133bb64fe9c1eb

  • SHA512

    689fd585232031f746b1573d3ed66ac329420611d4e1092ce6952b49ab0c168091726bd02189a4e183d1196ced4f51953e4eb25a5219a36f86d8f6761da9f129

  • SSDEEP

    1536:xzICS4AAwczUUf8y8gvMH+1zGSNAojMP95D1xDqk3sA9atm8z+L8QBfuSoyAMjwT:KqJogYkcSNm9V7D7352v+L8DnyAewT

Malware Config

Signatures

  • Renames multiple (594) files with added filename extension

    This suggests ransomware activity of encrypting all the files on the system.

  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Deletes itself 1 IoCs
  • Executes dropped EXE 1 IoCs
  • Reads user/profile data of web browsers 3 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Drops desktop.ini file(s) 2 IoCs
  • Indicator Removal: File Deletion 1 TTPs

    Adversaries may delete files left behind by the actions of their intrusion activity.

  • Drops file in System32 directory 4 IoCs
  • Sets desktop wallpaper using registry 2 TTPs 2 IoCs
  • Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 3 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Checks processor information in registry 2 TTPs 3 IoCs

    Processor information is often read in order to detect sandboxing environments.

  • Enumerates system info in registry 2 TTPs 3 IoCs
  • Modifies Control Panel 2 IoCs
  • Modifies registry class 5 IoCs
  • Opens file in notepad (likely ransom note) 1 IoCs
  • Suspicious behavior: AddClipboardFormatListener 2 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: RenamesItself 26 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of SetWindowsHookEx 14 IoCs
  • Suspicious use of WriteProcessMemory 11 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\PepperX (1).exe
    "C:\Users\Admin\AppData\Local\Temp\PepperX (1).exe"
    1⤵
    • Drops desktop.ini file(s)
    • Sets desktop wallpaper using registry
    • System Location Discovery: System Language Discovery
    • Modifies Control Panel
    • Modifies registry class
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1928
    • C:\Windows\splwow64.exe
      C:\Windows\splwow64.exe 12288
      2⤵
      • Drops file in System32 directory
      PID:1428
    • C:\ProgramData\D543.tmp
      "C:\ProgramData\D543.tmp"
      2⤵
      • Checks computer location settings
      • Deletes itself
      • Executes dropped EXE
      • Suspicious use of NtSetInformationThreadHideFromDebugger
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: RenamesItself
      • Suspicious use of WriteProcessMemory
      PID:1748
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C DEL /F /Q C:\PROGRA~3\D543.tmp >> NUL
        3⤵
        • System Location Discovery: System Language Discovery
        PID:2616
  • C:\Windows\system32\svchost.exe
    C:\Windows\system32\svchost.exe -k PrintWorkflow -s PrintWorkflowUserSvc
    1⤵
      PID:1896
    • C:\Windows\system32\printfilterpipelinesvc.exe
      C:\Windows\system32\printfilterpipelinesvc.exe -Embedding
      1⤵
      • Drops file in System32 directory
      • Suspicious use of WriteProcessMemory
      PID:5072
      • C:\Program Files\Microsoft Office\root\Office16\ONENOTE.EXE
        /insertdoc "C:\Users\Admin\AppData\Local\Microsoft\Windows\INetCache\{3CEFB075-FCCC-42A5-9B47-4AFCBB8CA76E}.xps" 133771148931550000
        2⤵
        • Checks processor information in registry
        • Enumerates system info in registry
        • Suspicious behavior: AddClipboardFormatListener
        • Suspicious use of SetWindowsHookEx
        PID:4108
    • C:\Windows\system32\NOTEPAD.EXE
      "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\Desktop\1pvSvxmZY.README.txt
      1⤵
      • Opens file in notepad (likely ransom note)
      • Suspicious use of FindShellTrayWindow
      PID:4684

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\$Recycle.Bin\S-1-5-21-2878641211-696417878-3864914810-1000\DDDDDDDDDDD

      Filesize

      129B

      MD5

      6edcb035c9dfbc2789ac3ae9ac9b0c8c

      SHA1

      7d18f278763695c4f4006556745083ec3c1386a4

      SHA256

      0c512c03ebab253f272c9b8905e484a88c1bd324eaf3e07e0de453d13b224ee9

      SHA512

      059740f3771bce1481ca0db84bb58708aa595551501316073ff1eeef3072b05ea8de60f5ab020a8e8e1e999744333d2d4d32cb5b0c5225af36e5613fc36dad6e

    • C:\1pvSvxmZY.README.txt

      Filesize

      348B

      MD5

      9810eed5ecd966874ebeb398ac6531ed

      SHA1

      17d2e2bc15df652734b79185cb323e652559fd6a

      SHA256

      53183e5ed0cf42bed46b17c9dcc92ea49737bb57dce34f1e20675a913796566e

      SHA512

      b26ca61461ed8b09f037e33d209cd0a22959b89e3e7895e057f544010fd5ae037e4fa76311763c121cd6e8b3050de22fa7d2163b4d9cf40585e14f5024e0cb79

    • C:\ProgramData\D543.tmp

      Filesize

      14KB

      MD5

      294e9f64cb1642dd89229fff0592856b

      SHA1

      97b148c27f3da29ba7b18d6aee8a0db9102f47c9

      SHA256

      917e115cc403e29b4388e0d175cbfac3e7e40ca1742299fbdb353847db2de7c2

      SHA512

      b87d531890bf1577b9b4af41dddb2cdbbfa164cf197bd5987df3a3075983645a3acba443e289b7bfd338422978a104f55298fbfe346872de0895bde44adc89cf

    • C:\Users\Admin\AppData\Local\Temp\CCCCCCCCCCCCCCC

      Filesize

      146KB

      MD5

      52e4154d66f3ce1f363d4e711bcac74e

      SHA1

      a5c81539eca857d160c750e8c5617604af96142f

      SHA256

      1a231efb2688b6746ab221f95d2e25a0a8236cd1770313156ee089333ceef0e1

      SHA512

      a2c925a55de147fa3a9a1db9c6a8aa6e37ab12b1f30d9f8164e6af6f3ae640c4ef3788ca20daf845aa718ee1403c230c155e451faf3f2950cf2f5974a6e267f4

    • C:\Users\Admin\AppData\Local\Temp\{5CA7071F-636B-4408-9B81-3FB19B42961D}

      Filesize

      4KB

      MD5

      cd2402e8bb90070e57a6932cfa962835

      SHA1

      a271ce8fe74343b9af083a4c34f5c897294f0360

      SHA256

      31ac1a08ac864048d5952c0ff30478a9dc8d5b19a58b0b54ce7469b196169ba7

      SHA512

      ae8a289cb79e7f9a113a201a622aacb340f70edc6209d35d2f4c9a64390b5065bae2f27be96a276a242c6d6139991f239e638013a16f7c2e5fdc885842df8021

    • C:\Users\Admin\Documents\OneNote Notebooks\My Notebook\Open Notebook.onetoc2

      Filesize

      4KB

      MD5

      fdd29b789f11b36816328a09c14d73a2

      SHA1

      e51e5b33a13ded8175d441b8c43a1918eb9c7999

      SHA256

      16243088527ad01ef392bfa88b7e8c643bc8450c42fd5152b5f34dfaab7d8eea

      SHA512

      b93ed284e7cbb21e9aef2a7a3ebc916c12774f56129d926561d449d96ab14e54e8b00a53efb6b9acedcd3e35ccd1e40e1af6a811553abbe8944e1f803845e18f

    • F:\$RECYCLE.BIN\S-1-5-21-2878641211-696417878-3864914810-1000\DDDDDDDDDDD

      Filesize

      129B

      MD5

      98192d83bbfe7fa0faff7976bbe98be1

      SHA1

      10ee50e2ed4f3be5d25f6f244a8b40b3bbe7192e

      SHA256

      17b98ca5b9e32420307ebbd5d18b1e1daa1fa0d00df4e2f476194580637db87a

      SHA512

      8909e2a534a009a1d388cfadc9983dde07385a427e0ef85b705a4155e90feca105bb4e47979440a9ddc267de0c3726875eabbdefa8f3fc50c751543f44b513be

    • memory/1928-2929-0x00000000013D0000-0x00000000013E0000-memory.dmp

      Filesize

      64KB

    • memory/1928-1-0x00000000013D0000-0x00000000013E0000-memory.dmp

      Filesize

      64KB

    • memory/1928-2931-0x00000000013D0000-0x00000000013E0000-memory.dmp

      Filesize

      64KB

    • memory/1928-0-0x00000000013D0000-0x00000000013E0000-memory.dmp

      Filesize

      64KB

    • memory/1928-2-0x00000000013D0000-0x00000000013E0000-memory.dmp

      Filesize

      64KB

    • memory/1928-2930-0x00000000013D0000-0x00000000013E0000-memory.dmp

      Filesize

      64KB

    • memory/4108-2980-0x00007FF967C60000-0x00007FF967C70000-memory.dmp

      Filesize

      64KB

    • memory/4108-2948-0x00007FF969FB0000-0x00007FF969FC0000-memory.dmp

      Filesize

      64KB

    • memory/4108-2951-0x00007FF969FB0000-0x00007FF969FC0000-memory.dmp

      Filesize

      64KB

    • memory/4108-2950-0x00007FF969FB0000-0x00007FF969FC0000-memory.dmp

      Filesize

      64KB

    • memory/4108-2981-0x00007FF967C60000-0x00007FF967C70000-memory.dmp

      Filesize

      64KB

    • memory/4108-2949-0x00007FF969FB0000-0x00007FF969FC0000-memory.dmp

      Filesize

      64KB

    • memory/4108-2947-0x00007FF969FB0000-0x00007FF969FC0000-memory.dmp

      Filesize

      64KB

    • memory/4108-3016-0x00007FF969FB0000-0x00007FF969FC0000-memory.dmp

      Filesize

      64KB

    • memory/4108-3017-0x00007FF969FB0000-0x00007FF969FC0000-memory.dmp

      Filesize

      64KB

    • memory/4108-3019-0x00007FF969FB0000-0x00007FF969FC0000-memory.dmp

      Filesize

      64KB

    • memory/4108-3018-0x00007FF969FB0000-0x00007FF969FC0000-memory.dmp

      Filesize

      64KB