Analysis

  • max time kernel
    146s
  • max time network
    153s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    24/05/2024, 04:45

General

  • Target

    2024-05-24_d5338df66edbcc3b8788b40fc723469d_cryptolocker.exe

  • Size

    71KB

  • MD5

    d5338df66edbcc3b8788b40fc723469d

  • SHA1

    41778795cee0a2532fe9098a8a8e86544edbbd2c

  • SHA256

    ff0bde34d1deaa5d7914732a2fcad43b7a3955ce99958be76738a556be25f9a6

  • SHA512

    a4d4483e5a9e8afd6566976f25996189da9625b1eeaae7ffb14a400935e28cd4059261d82fa641b37e504e454815b63845d9e40998a99fdd18976798af8071bc

  • SSDEEP

    1536:nj+4zs2cPVhlMOtEvwDpj4H8u8rZVTs9I+:C4Q2c94OtEvwDpj4H8zk

Score
9/10
upx

Malware Config

Signatures

  • Detection of CryptoLocker Variants 5 IoCs
  • Detection of Cryptolocker Samples 3 IoCs
  • UPX dump on OEP (original entry point) 5 IoCs
  • Checks computer location settings 2 TTPs 2 IoCs

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

  • Executes dropped EXE 1 IoCs
  • UPX packed file 5 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

  • Enumerates physical storage devices 1 TTPs

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

  • Modifies system certificate store 2 TTPs 8 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-05-24_d5338df66edbcc3b8788b40fc723469d_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-24_d5338df66edbcc3b8788b40fc723469d_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3660
    • C:\Users\Admin\AppData\Local\Temp\misid.exe
      "C:\Users\Admin\AppData\Local\Temp\misid.exe"
      2⤵
      • Checks computer location settings
      • Executes dropped EXE
      • Modifies system certificate store
      PID:2772
  • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
    "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=2804 --field-trial-handle=2292,i,2103142837140538807,15881446839139365070,262144 --variations-seed-version /prefetch:8
    1⤵
      PID:4352

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Local\Temp\misid.exe

      Filesize

      71KB

      MD5

      6516c72398ac85892f7fcf024a5f0d36

      SHA1

      fa6afc50e9048825b3b15d2594640324bc928032

      SHA256

      a5548596e67d11e5a4eea5390bbe4fdd1534270c57d3f981d38655b125c09d93

      SHA512

      f86a63d726fcf499ce394be268c1ebf23dc25e495bf20ba5fc394ff9d5d20a7959fc625d8671954d4f8bcb115eba9e101fbb5d7b90ac0601e911a2bcc258743a

    • C:\Users\Admin\AppData\Local\Temp\misids.exe

      Filesize

      315B

      MD5

      a34ac19f4afae63adc5d2f7bc970c07f

      SHA1

      a82190fc530c265aa40a045c21770d967f4767b8

      SHA256

      d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

      SHA512

      42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

    • memory/2772-17-0x0000000000500000-0x0000000000510000-memory.dmp

      Filesize

      64KB

    • memory/2772-19-0x00000000006A0000-0x00000000006A6000-memory.dmp

      Filesize

      24KB

    • memory/2772-20-0x0000000002000000-0x0000000002006000-memory.dmp

      Filesize

      24KB

    • memory/2772-50-0x0000000000500000-0x0000000000510000-memory.dmp

      Filesize

      64KB

    • memory/3660-0-0x0000000000500000-0x0000000000510000-memory.dmp

      Filesize

      64KB

    • memory/3660-1-0x0000000000560000-0x0000000000566000-memory.dmp

      Filesize

      24KB

    • memory/3660-2-0x0000000000560000-0x0000000000566000-memory.dmp

      Filesize

      24KB

    • memory/3660-3-0x00000000020F0000-0x00000000020F6000-memory.dmp

      Filesize

      24KB

    • memory/3660-27-0x0000000000500000-0x0000000000510000-memory.dmp

      Filesize

      64KB