Analysis

  • max time kernel
    150s
  • max time network
    76s
  • platform
    windows7_x64
  • resource
    win7-20220812-en
  • resource tags

    arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
  • submitted
    24-11-2022 00:19

General

  • Target

    ea85312349a1e9a78ef14a3536b7f40342cab1a2a645cb0ac4d51e5a3c651575.exe

  • Size

    184KB

  • MD5

    527c878d164b137e5ded518f44f0fc5a

  • SHA1

    0d81b47e0ba6d4a4b8e6a2219ca10d7cea54139e

  • SHA256

    ea85312349a1e9a78ef14a3536b7f40342cab1a2a645cb0ac4d51e5a3c651575

  • SHA512

    4f73c7f23c30c163f98ff03ac8f7becfb2d26ac90ebb5d4dd51330a767beab9eb834c4f6ac32b644c5c2722e12d69897d200b072b9ac30027ac297da3614e6c5

  • SSDEEP

    3072:FAj1cfl/BTyzcM+Knvmb7/D263i4qMbBQhAKIWOD2r1oX1/hcNcfAUane4RzsUZx:EClpTFzKnvmb7/D26y4qMSyKbOD2r1oG

Score
10/10

Malware Config

Signatures

  • Modifies visiblity of hidden/system files in Explorer 2 TTPs 2 IoCs
  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 2 IoCs
  • Adds Run key to start application 2 TTPs 52 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 4 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\ea85312349a1e9a78ef14a3536b7f40342cab1a2a645cb0ac4d51e5a3c651575.exe
    "C:\Users\Admin\AppData\Local\Temp\ea85312349a1e9a78ef14a3536b7f40342cab1a2a645cb0ac4d51e5a3c651575.exe"
    1⤵
    • Modifies visiblity of hidden/system files in Explorer
    • Loads dropped DLL
    • Adds Run key to start application
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:1652
    • C:\Users\Admin\keiyuoz.exe
      "C:\Users\Admin\keiyuoz.exe"
      2⤵
      • Modifies visiblity of hidden/system files in Explorer
      • Executes dropped EXE
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of SetWindowsHookEx
      PID:1108

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • C:\Users\Admin\keiyuoz.exe

    Filesize

    184KB

    MD5

    b7e82c6cb281f8bad8282f724f66fbd9

    SHA1

    bdbaab76df0f1427f7e76b0f4b541fbd0f1e1a16

    SHA256

    478127249e209694077403281e8ab17c5b636b2e63c965da41adeaaa7f82b94c

    SHA512

    2d9286006e015f1cca12d0d86631588134b8fa8fcf14faad9b0b60da57a33eaa69ba50c849b5009eaa21ae2651610d6c45f76f534abab8b1a78b8e6feb6c1f40

  • C:\Users\Admin\keiyuoz.exe

    Filesize

    184KB

    MD5

    b7e82c6cb281f8bad8282f724f66fbd9

    SHA1

    bdbaab76df0f1427f7e76b0f4b541fbd0f1e1a16

    SHA256

    478127249e209694077403281e8ab17c5b636b2e63c965da41adeaaa7f82b94c

    SHA512

    2d9286006e015f1cca12d0d86631588134b8fa8fcf14faad9b0b60da57a33eaa69ba50c849b5009eaa21ae2651610d6c45f76f534abab8b1a78b8e6feb6c1f40

  • \Users\Admin\keiyuoz.exe

    Filesize

    184KB

    MD5

    b7e82c6cb281f8bad8282f724f66fbd9

    SHA1

    bdbaab76df0f1427f7e76b0f4b541fbd0f1e1a16

    SHA256

    478127249e209694077403281e8ab17c5b636b2e63c965da41adeaaa7f82b94c

    SHA512

    2d9286006e015f1cca12d0d86631588134b8fa8fcf14faad9b0b60da57a33eaa69ba50c849b5009eaa21ae2651610d6c45f76f534abab8b1a78b8e6feb6c1f40

  • \Users\Admin\keiyuoz.exe

    Filesize

    184KB

    MD5

    b7e82c6cb281f8bad8282f724f66fbd9

    SHA1

    bdbaab76df0f1427f7e76b0f4b541fbd0f1e1a16

    SHA256

    478127249e209694077403281e8ab17c5b636b2e63c965da41adeaaa7f82b94c

    SHA512

    2d9286006e015f1cca12d0d86631588134b8fa8fcf14faad9b0b60da57a33eaa69ba50c849b5009eaa21ae2651610d6c45f76f534abab8b1a78b8e6feb6c1f40

  • memory/1108-60-0x0000000000000000-mapping.dmp

  • memory/1108-66-0x0000000000400000-0x000000000042F000-memory.dmp

    Filesize

    188KB

  • memory/1108-69-0x0000000000400000-0x000000000042F000-memory.dmp

    Filesize

    188KB

  • memory/1652-56-0x0000000000400000-0x000000000042F000-memory.dmp

    Filesize

    188KB

  • memory/1652-57-0x00000000758C1000-0x00000000758C3000-memory.dmp

    Filesize

    8KB

  • memory/1652-61-0x0000000002C20000-0x0000000002C4F000-memory.dmp

    Filesize

    188KB

  • memory/1652-68-0x0000000000400000-0x000000000042F000-memory.dmp

    Filesize

    188KB