Analysis

  • max time kernel
    150s
  • max time network
    156s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    09/03/2024, 18:17

General

  • Target

    bc7af9ef586b135a7d9b0f7f0b7a6ac8.exe

  • Size

    50KB

  • MD5

    bc7af9ef586b135a7d9b0f7f0b7a6ac8

  • SHA1

    f850227635f65fa43f53965cc5e53ef62716e3b7

  • SHA256

    e6088fed663568cc2cb74c56f8fd72f2d72b629c76336739ea4ca1a281ccbae8

  • SHA512

    3ca25bc626f3048caabb1449890ccfe03bf1c88db5f714a674e2267c781171593c7e0c03e80105fdb3c52a8912734f48bed2129f318bcac6006ed3e134622f8c

  • SSDEEP

    768:X8Q2ZDX3LKew369lp2z3Sd4baFXLjwP/Tgj93b8NIom46+IzhoR84ceH3Zp6Ue6M:s9Z3KcR4mjD9r8226+GCXXpfr1i

Malware Config

Signatures

  • Executes dropped EXE 2 IoCs
  • Reads user/profile data of web browsers 2 TTPs

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

  • UPX packed file 6 IoCs

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

  • Adds Run key to start application 2 TTPs 2 IoCs
  • Drops file in Windows directory 2 IoCs
  • Modifies system certificate store 2 TTPs 8 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 6 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\bc7af9ef586b135a7d9b0f7f0b7a6ac8.exe
    "C:\Users\Admin\AppData\Local\Temp\bc7af9ef586b135a7d9b0f7f0b7a6ac8.exe"
    1⤵
    • Adds Run key to start application
    • Drops file in Windows directory
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2084
    • C:\Users\Admin\AppData\Local\Temp\i58xPz4nL9catKd.exe
      C:\Users\Admin\AppData\Local\Temp\i58xPz4nL9catKd.exe
      2⤵
      • Executes dropped EXE
      • Modifies system certificate store
      PID:2812
    • C:\Windows\CTS.exe
      "C:\Windows\CTS.exe"
      2⤵
      • Executes dropped EXE
      • Adds Run key to start application
      • Drops file in Windows directory
      • Suspicious use of AdjustPrivilegeToken
      PID:4192

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Microsoft\Office\16.0\excel.exe_Rules.xml

    Filesize

    358KB

    MD5

    2955dc220fcb015b44762cca4d49b886

    SHA1

    ce901836f24368ba70766a74d0c9a6d759d9671b

    SHA256

    5389fe6c617d90b625cf125015b5d1e2c4311d25afcfe4da178bdda29af47f70

    SHA512

    ee2eee7a818eb1914cecae48c9c99662bda676d7241f797bbfa18858db4fc5009e22f62a0bda7cf4e3f688a439717f88807c497fdd03bcf795f267eb6ca905aa

  • C:\Users\Admin\AppData\Local\Temp\i58xPz4nL9catKd.exe

    Filesize

    15KB

    MD5

    92f9de5aaf4021b73961e14303746f95

    SHA1

    331b792e347ebaf6b6b4c9ac65d742061e1a9f0a

    SHA256

    13c921999e5ff273007a610a8521bbc77d884b41d9cbbd41e045b3497909659c

    SHA512

    314749d46a3584213e55c7030e087e06f1e5bc5fbb8f99210a4e3014b9f44f3be7e791f48c570dd0abaf73584322ebb6be0d2ea5dbbfe343245cced22b172225

  • C:\Windows\CTS.exe

    Filesize

    35KB

    MD5

    93e5f18caebd8d4a2c893e40e5f38232

    SHA1

    fd55c4e6bcd108bce60ea719c06dc9c4d0adafa6

    SHA256

    a66c4b98becac2f69cb107cd087d7a2ca9ef511bc3b83367b1f440f11dd159a8

    SHA512

    986583610d27caae2080834301d072557c5d2c85e33f0d19ab1245d7eae8db146397461572ddb3d491be16f3af210720d54267dac838fdad8fe34afa3d6b7f54

  • memory/2084-0-0x00000000008A0000-0x00000000008B7000-memory.dmp

    Filesize

    92KB

  • memory/2084-7-0x00000000008A0000-0x00000000008B7000-memory.dmp

    Filesize

    92KB

  • memory/2812-11-0x0000000074EC0000-0x0000000075471000-memory.dmp

    Filesize

    5.7MB

  • memory/2812-13-0x0000000074EC0000-0x0000000075471000-memory.dmp

    Filesize

    5.7MB

  • memory/2812-14-0x0000000001390000-0x00000000013A0000-memory.dmp

    Filesize

    64KB

  • memory/2812-49-0x0000000074EC0000-0x0000000075471000-memory.dmp

    Filesize

    5.7MB

  • memory/4192-9-0x0000000000940000-0x0000000000957000-memory.dmp

    Filesize

    92KB

  • memory/4192-50-0x0000000000940000-0x0000000000957000-memory.dmp

    Filesize

    92KB