Analysis

  • max time kernel
    117s
  • max time network
    122s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    25-04-2024 03:13

General

  • Target

    Document.doc.scr.exe

  • Size

    194KB

  • MD5

    50e5dec57451005668704281688ca55d

  • SHA1

    67dd4ac7eb8c193b39149b34d3a0d5bc21c3f200

  • SHA256

    062683257386c9e41a1cd1493f029d817445c37f7c65386d54122fa466419ce1

  • SHA512

    29ca4a44795c71d3e2b4e3417355ebb93765157d464d6d5a3fe6774056d934d57081c72001fb29e47982da11e5a5ccfdbcc958d05a11fb49bd8bf84e6d0c61ad

  • SSDEEP

    3072:66glyuxE4GsUPnliByocWepRGbVZqid91h2ys+tU:66gDBGpvEByocWeubV4inP9B

Malware Config

Signatures

  • Renames multiple (287) files with added filename extension

    This suggests ransomware activity of encrypting all the files on the system.

  • Deletes itself 1 IoCs
  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 1 IoCs
  • Reads user/profile data of web browsers 2 TTPs

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

  • Drops desktop.ini file(s) 2 IoCs
  • Sets desktop wallpaper using registry 2 TTPs 2 IoCs
  • Suspicious use of NtSetInformationThreadHideFromDebugger 5 IoCs
  • Modifies Control Panel 2 IoCs
  • Modifies registry class 5 IoCs
  • Suspicious behavior: EnumeratesProcesses 14 IoCs
  • Suspicious behavior: RenamesItself 26 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of WriteProcessMemory 9 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Document.doc.scr.exe
    "C:\Users\Admin\AppData\Local\Temp\Document.doc.scr.exe"
    1⤵
    • Loads dropped DLL
    • Drops desktop.ini file(s)
    • Sets desktop wallpaper using registry
    • Suspicious use of NtSetInformationThreadHideFromDebugger
    • Modifies Control Panel
    • Modifies registry class
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2032
    • C:\ProgramData\9B84.tmp
      "C:\ProgramData\9B84.tmp"
      2⤵
      • Deletes itself
      • Executes dropped EXE
      • Suspicious use of NtSetInformationThreadHideFromDebugger
      • Suspicious behavior: RenamesItself
      • Suspicious use of WriteProcessMemory
      PID:924
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C DEL /F /Q C:\PROGRA~3\9B84.tmp >> NUL
        3⤵
          PID:744
    • C:\Windows\system32\AUDIODG.EXE
      C:\Windows\system32\AUDIODG.EXE 0x154
      1⤵
        PID:1604

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

      Loading Replay Monitor...

      Downloads

      • C:\$Recycle.Bin\S-1-5-21-330940541-141609230-1670313778-1000\JJJJJJJJJJJ

        Filesize

        129B

        MD5

        c554781ca8ad34b9a215872e8d2e7b2b

        SHA1

        9f8a85b93db7f37352a2c0b00a8db561e9fcf4ea

        SHA256

        27714734fb4999086c40a7284e48ff4c498ad03c2d00622500b519548be50dfb

        SHA512

        e13b38c3490242a83a6b7dc6330032b17cc75258a09777843549211731da5180b5e6756a9e04814d0b62bd275cd18e1ba78c6c3855e66b22242d9243c3114a33

      • C:\Qs2QSInbk.README.txt

        Filesize

        434B

        MD5

        ad29bd8c66e114ff57c943d16c78f72a

        SHA1

        5ab070ee89a36f38facae4dfc8ec5ce3e59af46e

        SHA256

        6fe668fe8bf69158d1fd08e90f3cff60c1df410bf752635bf152853b6112549c

        SHA512

        a53121e2379aa9c3bc52d073498a54f26383834f6d6636b4b3831010565c80bf0da07511907eab7bd92f9796e559958b1c0ebea4c4b0f0d869e95b7deb5da7f1

      • C:\Users\Admin\AppData\Local\Temp\FFFFFFFFFFFFFFFFFFFF

        Filesize

        194KB

        MD5

        4952591960de6aca594760fc9b4bcb14

        SHA1

        f1f1ad5a317e62f0db9bf92df59f9ec728dbe29d

        SHA256

        994c069ee2512420bd7c99130917fad95e849e94a6cbcb73bb118a7993de8e35

        SHA512

        fd41371386f12dd1ea0ff3c27955b68387abcffd970c3141be8e2f3a398ca8720f65cfb0ed23c6c99169a53c65a1aa14858d3c0b5b511c329e18bdc6fbdaebc7

      • F:\$RECYCLE.BIN\S-1-5-21-330940541-141609230-1670313778-1000\DDDDDDDDDDD

        Filesize

        129B

        MD5

        03faeb00a3a9ff1b3e3bf7a1d530765f

        SHA1

        68a85be926b7da0969ac679000ff86cb8f622128

        SHA256

        e41a8015250c9868b5e56da83b5ff04d60a12cdfd9beb2bc2b47e2a1b35c127f

        SHA512

        ccbefadae57594c54e2c46f00a3266f5465d2066dbe8cd30d28cb82dbe18634810ae82a0f4582e001432ba8e5d681314c1d542be3ea4aab6196ab11baae27863

      • \ProgramData\9B84.tmp

        Filesize

        14KB

        MD5

        294e9f64cb1642dd89229fff0592856b

        SHA1

        97b148c27f3da29ba7b18d6aee8a0db9102f47c9

        SHA256

        917e115cc403e29b4388e0d175cbfac3e7e40ca1742299fbdb353847db2de7c2

        SHA512

        b87d531890bf1577b9b4af41dddb2cdbbfa164cf197bd5987df3a3075983645a3acba443e289b7bfd338422978a104f55298fbfe346872de0895bde44adc89cf

      • memory/924-812-0x0000000002210000-0x0000000002250000-memory.dmp

        Filesize

        256KB

      • memory/924-805-0x000000007EFA0000-0x000000007EFA1000-memory.dmp

        Filesize

        4KB

      • memory/924-818-0x0000000002210000-0x0000000002250000-memory.dmp

        Filesize

        256KB

      • memory/924-820-0x000000007EF20000-0x000000007EF21000-memory.dmp

        Filesize

        4KB

      • memory/924-819-0x000000007EF80000-0x000000007EF81000-memory.dmp

        Filesize

        4KB

      • memory/924-838-0x000000007EF40000-0x000000007EF41000-memory.dmp

        Filesize

        4KB

      • memory/924-839-0x000000007EF40000-0x000000007EF41000-memory.dmp

        Filesize

        4KB

      • memory/2032-0-0x0000000002210000-0x0000000002250000-memory.dmp

        Filesize

        256KB