Resubmissions

06-12-2021 10:42

211206-mrvzjadggm 10

18-11-2021 09:01

211118-kyyynafbd7 7

18-11-2021 08:53

211118-ktap9scbam 7

Analysis

  • max time kernel
    111s
  • max time network
    129s
  • platform
    windows10_x64
  • resource
    win10-en-20211104
  • submitted
    18-11-2021 09:01

General

  • Target

    2098765234567890987660.E.exe

  • Size

    759KB

  • MD5

    bbbf28c148eb325812183d91d8e8a239

  • SHA1

    ba7612abff608b6dd038acfb43a31741329e007c

  • SHA256

    caa0fa101c0ee313ae591239f18dcd8fc37cb235af7dfb2e9de350d7f448d34b

  • SHA512

    852c5aedfc4090559d50ea136aeb6270308766585acb49054f64c570af1011e26b295d681064cbe00d227b3d4dbfd0cc2a34d1113052eb5cc097dbde925978bc

Malware Config

Signatures

  • Loads dropped DLL 1 IoCs
  • Reads data files stored by FTP clients 2 TTPs

    Tries to access configuration files associated with programs like FileZilla.

  • Reads user/profile data of local email clients 2 TTPs

    Email clients store some user data on disk where infostealers will often target it.

  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs
  • Drops desktop.ini file(s) 2 IoCs
  • Looks up external IP address via web service 3 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Suspicious use of SetThreadContext 1 IoCs
  • Drops file in Windows directory 3 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious behavior: EnumeratesProcesses 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 10 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2098765234567890987660.E.exe
    "C:\Users\Admin\AppData\Local\Temp\2098765234567890987660.E.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:3568
    • C:\Users\Admin\AppData\Local\Temp\2098765234567890987660.E.exe
      "C:\Users\Admin\AppData\Local\Temp\2098765234567890987660.E.exe"
      2⤵
      • Accesses Microsoft Outlook profiles
      • Drops desktop.ini file(s)
      • Drops file in Windows directory
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • outlook_office_path
      • outlook_win_path
      PID:3976

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • \Users\Admin\AppData\Local\Temp\nsy9889.tmp\gotnxdaktoc.dll

    MD5

    48ec27c77c23413f4e11e531b775542f

    SHA1

    46fdd7b618bf1abea37a04a38f72664db65dba97

    SHA256

    ff894568ef9ab2d4bffa5b9c4d67460c292d74e921090395cb4b4812c4146c9c

    SHA512

    2f0a89c420bb89e4546313709e2ba735252f839f069cb8510101bff9875ecb85206e9e77993c890fb7495bb557b81a4d149ae9a61f50b3513211b3f5aa6e5e3d

  • memory/3976-119-0x0000000000400000-0x000000000048B000-memory.dmp

    Filesize

    556KB

  • memory/3976-120-0x000000000040188B-mapping.dmp

  • memory/3976-121-0x0000000000400000-0x000000000048B000-memory.dmp

    Filesize

    556KB

  • memory/3976-122-0x0000000002400000-0x0000000002401000-memory.dmp

    Filesize

    4KB

  • memory/3976-123-0x0000000002401000-0x0000000002402000-memory.dmp

    Filesize

    4KB

  • memory/3976-125-0x0000000002407000-0x0000000002408000-memory.dmp

    Filesize

    4KB

  • memory/3976-124-0x0000000002402000-0x0000000002404000-memory.dmp

    Filesize

    8KB

  • memory/3976-126-0x0000000002408000-0x0000000002409000-memory.dmp

    Filesize

    4KB