Analysis

  • max time kernel
    142s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231020-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231020-enlocale:en-usos:windows10-2004-x64system
  • submitted
    06/11/2023, 19:20

General

  • Target

    NEAS.2023-09-29_b70f078aaa7e019e9d03d471e5dcfcaf_cryptolocker.exe

  • Size

    78KB

  • MD5

    b70f078aaa7e019e9d03d471e5dcfcaf

  • SHA1

    b746f5602d9b09ecc163a6797b6819eeb798e079

  • SHA256

    afbad3f087935c9d23e4accb2cdaa076ea4b27790002ac6dc6d7d73130ac9cf9

  • SHA512

    0e9581613791c8f8519746fe233ea5ca5819a0d51f8549121001bffe15ff8e1049d54b279b0876f5158e02df139f331fd6516bbc97deabe143edbbe787ea2959

  • SSDEEP

    1536:Tj+jsMQMOtEvwDpj5HmpJpOUHECgNMo0vp2EMM7:TCjsIOtEvwDpj5HE/OUHnSMV

Score
7/10

Malware Config

Signatures

  • Checks computer location settings 2 TTPs 2 IoCs

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

  • Executes dropped EXE 1 IoCs
  • 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\NEAS.2023-09-29_b70f078aaa7e019e9d03d471e5dcfcaf_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\NEAS.2023-09-29_b70f078aaa7e019e9d03d471e5dcfcaf_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4164
    • 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:2260

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

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

          Filesize

          78KB

          MD5

          ef511742938260f907e8fc3ed96050c6

          SHA1

          66a1985ff2046fd5a20ff4a1d248cc85538b7e6a

          SHA256

          ec112718b8e359331fa59df17970721db9814695b10f282e4f0c991844841f80

          SHA512

          53d582ae22d479a94dd3bfa194d6f4081e88dd6d84d33a6284fa4df22c2b947fb61c9a8f6298ee9f12db94a647b88c3c675c4cbdbb32711b1df7c11cbb0227f7

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

          Filesize

          78KB

          MD5

          ef511742938260f907e8fc3ed96050c6

          SHA1

          66a1985ff2046fd5a20ff4a1d248cc85538b7e6a

          SHA256

          ec112718b8e359331fa59df17970721db9814695b10f282e4f0c991844841f80

          SHA512

          53d582ae22d479a94dd3bfa194d6f4081e88dd6d84d33a6284fa4df22c2b947fb61c9a8f6298ee9f12db94a647b88c3c675c4cbdbb32711b1df7c11cbb0227f7

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

          Filesize

          78KB

          MD5

          ef511742938260f907e8fc3ed96050c6

          SHA1

          66a1985ff2046fd5a20ff4a1d248cc85538b7e6a

          SHA256

          ec112718b8e359331fa59df17970721db9814695b10f282e4f0c991844841f80

          SHA512

          53d582ae22d479a94dd3bfa194d6f4081e88dd6d84d33a6284fa4df22c2b947fb61c9a8f6298ee9f12db94a647b88c3c675c4cbdbb32711b1df7c11cbb0227f7

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

          Filesize

          315B

          MD5

          a34ac19f4afae63adc5d2f7bc970c07f

          SHA1

          a82190fc530c265aa40a045c21770d967f4767b8

          SHA256

          d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

          SHA512

          42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

        • memory/2260-20-0x00000000004E0000-0x00000000004E6000-memory.dmp

          Filesize

          24KB

        • memory/2260-17-0x0000000000500000-0x000000000050E000-memory.dmp

          Filesize

          56KB

        • memory/2260-21-0x0000000000510000-0x0000000000516000-memory.dmp

          Filesize

          24KB

        • memory/2260-49-0x0000000000500000-0x000000000050E000-memory.dmp

          Filesize

          56KB

        • memory/4164-3-0x0000000000620000-0x0000000000626000-memory.dmp

          Filesize

          24KB

        • memory/4164-2-0x0000000000600000-0x0000000000606000-memory.dmp

          Filesize

          24KB

        • memory/4164-18-0x0000000000500000-0x000000000050E000-memory.dmp

          Filesize

          56KB

        • memory/4164-0-0x0000000000500000-0x000000000050E000-memory.dmp

          Filesize

          56KB

        • memory/4164-1-0x0000000000600000-0x0000000000606000-memory.dmp

          Filesize

          24KB