Overview

overview

8

Static

static

8

skin.exe

windows7_x64

8

skin.exe

windows10_x64

8

Analysis

  • max time kernel
    150s
  • max time network
    38s
  • platform
    windows7_x64
  • resource
    win7v20210408
  • submitted
    21-07-2021 21:12

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General

  • Target

    skin.exe

  • Size

    21KB

  • MD5

    0dd3173feb2aad3ff8ea4ec119a88640

  • SHA1

    a032af45d2222e34f19728207b7411a443eb8f72

  • SHA256

    a965c7ee5e32a7763ef8e666f12b96699cad180fdd1b8313afaf7177d61d2527

  • SHA512

    5ddd1a92d8c9fc2b7e611285179af418f1b07dd96ebe0f9879403d2e8dc5b2d0ee4911abfa9c23f57da55e0d17165786b2d4c38d1bc7a2faff1873f0ce807052

Score
8/10
upx

Malware Config

Signatures

  • Executes dropped EXE 1 IoCs
  • UPX packed file 2 IoCs

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

    upx
  • Deletes itself 1 IoCs
  • Drops file in Windows directory 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Checks processor information in registry 2 TTPs 2 IoCs

    Processor information is often read in order to detect sandboxing environments.

  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 8 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\skin.exe
    "C:\Users\Admin\AppData\Local\Temp\skin.exe"
    1⤵
    • Drops file in Windows directory
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:364
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\system32\cmd.exe" /c del C:\Users\Admin\AppData\Local\Temp\skin.exe > nul
      2⤵
      • Deletes itself
      PID:1940
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\system32\cmd.exe" /c del C:\Users\Admin\AppData\Local\Temp\skin.exe > nul
      2⤵
        PID:1276
    • C:\Windows\yykymu.exe
      C:\Windows\yykymu.exe
      1⤵
      • Executes dropped EXE
      • Checks processor information in registry
      PID:1572

    Network

    MITRE ATT&CK Enterprise v6

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    Downloads

    • C:\Windows\yykymu.exe
      MD5

      0dd3173feb2aad3ff8ea4ec119a88640

      SHA1

      a032af45d2222e34f19728207b7411a443eb8f72

      SHA256

      a965c7ee5e32a7763ef8e666f12b96699cad180fdd1b8313afaf7177d61d2527

      SHA512

      5ddd1a92d8c9fc2b7e611285179af418f1b07dd96ebe0f9879403d2e8dc5b2d0ee4911abfa9c23f57da55e0d17165786b2d4c38d1bc7a2faff1873f0ce807052

      Download Submit
    • C:\Windows\yykymu.exe
      MD5

      0dd3173feb2aad3ff8ea4ec119a88640

      SHA1

      a032af45d2222e34f19728207b7411a443eb8f72

      SHA256

      a965c7ee5e32a7763ef8e666f12b96699cad180fdd1b8313afaf7177d61d2527

      SHA512

      5ddd1a92d8c9fc2b7e611285179af418f1b07dd96ebe0f9879403d2e8dc5b2d0ee4911abfa9c23f57da55e0d17165786b2d4c38d1bc7a2faff1873f0ce807052

      Download Submit
    • memory/364-59-0x0000000075451000-0x0000000075453000-memory.dmp
      Filesize

      8KB

      Download
    • memory/1276-64-0x0000000000000000-mapping.dmp
      Download
    • memory/1940-63-0x0000000000000000-mapping.dmp
      Download