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Analysis

  • max time kernel
    117s
  • max time network
    121s
  • platform
    windows7_x64
  • resource
    win7-20231129-en
  • resource tags

    arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
  • submitted
    28/04/2024, 03:50

General

  • Target

    2024-04-28_c0bb7de9ce856c58c51e50c2ab2caf8d_cryptolocker.exe

  • Size

    35KB

  • MD5

    c0bb7de9ce856c58c51e50c2ab2caf8d

  • SHA1

    1822dacf84660b9085121c3f206b6083e5d79069

  • SHA256

    a7e359ff2252b3ec9268876f4154690ef52619e0238ff0542540bf9b3883ae62

  • SHA512

    e7f49edd054fd175780f5956e9299cf6b8b2649066d947848dec093f0ee36928d9c31a6c002a0a506cc4b8f42afe702b0aae4420a429eda550ab99f48c02adf9

  • SSDEEP

    384:btBYQg/WIEhUCSNyepEjYnDOAlzVol6U/zzo+tkq4l8tFFxE2B0qZ9:btB9g/WItCSsAGjX7r3BTZ9

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 1 IoCs
  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Modifies system certificate store 2 TTPs 4 IoCs
  • Suspicious use of UnmapMainImage 2 IoCs
  • Suspicious use of WriteProcessMemory 4 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-04-28_c0bb7de9ce856c58c51e50c2ab2caf8d_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-04-28_c0bb7de9ce856c58c51e50c2ab2caf8d_cryptolocker.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of UnmapMainImage
    • Suspicious use of WriteProcessMemory
    PID:1652
    • C:\Users\Admin\AppData\Local\Temp\gewos.exe
      "C:\Users\Admin\AppData\Local\Temp\gewos.exe"
      2⤵
      • Executes dropped EXE
      • Modifies system certificate store
      • Suspicious use of UnmapMainImage
      PID:3032

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\94308059B57B3142E455B38A6EB92015

    Filesize

    68KB

    MD5

    29f65ba8e88c063813cc50a4ea544e93

    SHA1

    05a7040d5c127e68c25d81cc51271ffb8bef3568

    SHA256

    1ed81fa8dfb6999a9fedc6e779138ffd99568992e22d300acd181a6d2c8de184

    SHA512

    e29b2e92c496245bed3372578074407e8ef8882906ce10c35b3c8deebfefe01b5fd7f3030acaa693e175f4b7aca6cd7d8d10ae1c731b09c5fa19035e005de3aa

  • \Users\Admin\AppData\Local\Temp\gewos.exe

    Filesize

    35KB

    MD5

    93bd80f7fcced6ab7b908e41c3139787

    SHA1

    f183341ab27e1dcf2541e30203614d1e1f2756a1

    SHA256

    2fba5528e107799e68110e417f2852b50cb1859ee90a5f7691ee888f40162b78

    SHA512

    881d266d661d599aee9950c59347300482e0a55bcca1a0c3c51c1396ff49b67edfa899db554ee3c8673f0736736023d1c0fc7bc9c53838c6d4b4518980536a44

  • memory/1652-1-0x0000000000400000-0x0000000000406000-memory.dmp

    Filesize

    24KB

  • memory/1652-0-0x00000000003F0000-0x00000000003F6000-memory.dmp

    Filesize

    24KB

  • memory/1652-8-0x00000000003F0000-0x00000000003F6000-memory.dmp

    Filesize

    24KB

  • memory/3032-23-0x0000000000290000-0x0000000000296000-memory.dmp

    Filesize

    24KB