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Analysis

  • max time kernel
    143s
  • max time network
    160s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    27/05/2024, 19:26

General

  • Target

    2024-05-27_1ccd3ef94200831188acb82d2cd7d8a2_cryptolocker.exe

  • Size

    81KB

  • MD5

    1ccd3ef94200831188acb82d2cd7d8a2

  • SHA1

    9b9bf0828674fc6bd232c58c43a03664cea04b03

  • SHA256

    e431612cfdc0fc44a910c6265ed78738208ff4f3a449c3600553c687099045a6

  • SHA512

    6d4238267345a1394f7b784983510ccce256df6a3833c40ce724b121aae4f7bfa467e73795e93deba08c67d3342269b7210e011a71a128a0c9444e5fef019787

  • SSDEEP

    1536:zj+soPSMOtEvwDpj4ktBl01hJ0tq1ky7QpSxO:zCsanOtEvwDpjv

Score
9/10
upx

Malware Config

Signatures

  • Detection of CryptoLocker Variants 5 IoCs
  • Detection of Cryptolocker Samples 5 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\2024-05-27_1ccd3ef94200831188acb82d2cd7d8a2_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-27_1ccd3ef94200831188acb82d2cd7d8a2_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4964
    • 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:1780
  • 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=4136 --field-trial-handle=2692,i,8678872182442199182,12502579059484928042,262144 --variations-seed-version /prefetch:8
    1⤵
      PID:1444

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

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

      Filesize

      81KB

      MD5

      d69208a1a4941b7de42363c6c3d1c9c6

      SHA1

      68c33442d3a27f750bda946e6442cadd2b407abe

      SHA256

      26e0bae764ed65d611453547ab601ec648a0d6d2fc2c0f61c50ac60b5eb6aa57

      SHA512

      8b666808fbc3d6cb4a944dd080d58cb0f6dbc150ca660d223db851a674a834653b6a087e71be40d4b6f712353fc59aa59d63bc2721fab24383d3e7a77d1f6f44

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

      Filesize

      315B

      MD5

      a34ac19f4afae63adc5d2f7bc970c07f

      SHA1

      a82190fc530c265aa40a045c21770d967f4767b8

      SHA256

      d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

      SHA512

      42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

    • memory/1780-18-0x0000000000500000-0x0000000000510000-memory.dmp

      Filesize

      64KB

    • memory/1780-20-0x0000000001F50000-0x0000000001F56000-memory.dmp

      Filesize

      24KB

    • memory/1780-21-0x0000000001F70000-0x0000000001F76000-memory.dmp

      Filesize

      24KB

    • memory/1780-49-0x0000000000500000-0x0000000000510000-memory.dmp

      Filesize

      64KB

    • memory/4964-0-0x0000000000500000-0x0000000000510000-memory.dmp

      Filesize

      64KB

    • memory/4964-1-0x00000000005E0000-0x00000000005E6000-memory.dmp

      Filesize

      24KB

    • memory/4964-2-0x00000000005E0000-0x00000000005E6000-memory.dmp

      Filesize

      24KB

    • memory/4964-3-0x0000000000610000-0x0000000000616000-memory.dmp

      Filesize

      24KB

    • memory/4964-17-0x0000000000500000-0x0000000000510000-memory.dmp

      Filesize

      64KB