Analysis

  • max time kernel
    149s
  • max time network
    147s
  • platform
    windows11-21h2_x64
  • resource
    win11-20260513-en
  • resource tags

    arch:x64arch:x86image:win11-20260513-enlocale:en-usos:windows11-21h2-x64systemwindows
  • submitted
    31/05/2026, 03:47

General

  • Target
    2026-05-31_9a69a4bef47f5f59d4cafc2efe203ff8_cobalt-strike_elex_hijackloader_icedid_njrat_vidar.exe
  • Size 5.9MB
  • Sample260531-eb95hsbt3l
  • SHA256 e5428a3161e639f081925535b43f10706fb0ebcf69562d060e17fe3f8c4136e5
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Signatures

  • Renames multiple (255) files with added filename extension

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

  • Drops file in Drivers directory 3 IoCs
  • Executes dropped EXE 2 IoCs
  • Reads user/profile data of web browsers 3 TTPs

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

  • Adds Run key to start application 2 TTPs 2 IoCs
  • Enumerates connected drives 3 TTPs 21 IoCs

    Attempts to read the root path of hard drives other than the default C: drive.

  • Drops file in Program Files directory 64 IoCs
  • Drops file in Windows directory 4 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 10 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Runs net.exe
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of WriteProcessMemory 8 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2026-05-31_9a69a4bef47f5f59d4cafc2efe203ff8_cobalt-strike_elex_hijackloader_icedid_njrat_vidar.exe
    "C:\Users\Admin\AppData\Local\Temp\2026-05-31_9a69a4bef47f5f59d4cafc2efe203ff8_cobalt-strike_elex_hijackloader_icedid_njrat_vidar.exe"
    1⤵
    • Drops file in Drivers directory
    • Adds Run key to start application
    • Drops file in Windows directory
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:4168
    • C:\Windows\SysWOW64\net.exe
      net stop "Kingsoft AntiVirus Service"
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:3240
      • C:\Windows\SysWOW64\net1.exe
        C:\Windows\system32\net1 stop "Kingsoft AntiVirus Service"
        3⤵
        • System Location Discovery: System Language Discovery
        PID:1060
    • C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c C:\Users\Admin\AppData\Local\Temp\$$a2B9F.bat
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2244
    • C:\Windows\Logo1_.exe
      C:\Windows\Logo1_.exe
      2⤵
      • Drops file in Drivers directory
      • Executes dropped EXE
      • Adds Run key to start application
      • Enumerates connected drives
      • Drops file in Program Files directory
      • Drops file in Windows directory
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:4196
      • C:\Windows\SysWOW64\net.exe
        net stop "Kingsoft AntiVirus Service"
        3⤵
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:2076
        • C:\Windows\SysWOW64\net1.exe
          C:\Windows\system32\net1 stop "Kingsoft AntiVirus Service"
          4⤵
          • System Location Discovery: System Language Discovery
          PID:3380
      • C:\Windows\SysWOW64\net.exe
        net stop "Kingsoft AntiVirus Service"
        3⤵
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:3096
        • C:\Windows\SysWOW64\net1.exe
          C:\Windows\system32\net1 stop "Kingsoft AntiVirus Service"
          4⤵
          • System Location Discovery: System Language Discovery
          PID:2368
  • C:\Windows\uninstall\rundl132.exe
    C:\Windows\uninstall\rundl132.exe
    1⤵
    • Drops file in Drivers directory
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4832

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

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        Downloads

        RCXC71D.tmp

        • Path C:\Program Files (x86)\Common Files\Adobe\ARM\1.0\RCXC71D.tmp
        • Size 94KB
        • SHA256 6b8d1137ee89aba4f58f07f9eb06bb6c595095fbe2800f5a979051138a92fa40
        • MD5 SHA1 SHA512 SSDEEP TLSH

        RCXC9CD.tmp

        • Path C:\Program Files (x86)\Microsoft\EdgeCore\139.0.3405.125\RCXC9CD.tmp
        • Size 103KB
        • SHA256 a1ca0d3092947d7785f8f1d8b3c47ef55d5f18394b2d8043909b18d37506b48b
        • MD5 SHA1 SHA512 SSDEEP TLSH

        RCXCA0F.tmp

        • Path C:\Program Files (x86)\Microsoft\EdgeUpdate_bk\RCXCA0F.tmp
        • Size 91KB
        • SHA256 0456d4808790ae440af497ab355e2944535902a491bf5d48879c66050dbc8866
        • MD5 SHA1 SHA512 SSDEEP TLSH

        RCXC8BD.tmp

        • Path C:\Program Files (x86)\Microsoft\Edge\Application\139.0.3405.125\RCXC8BD.tmp
        • Size 118KB
        • SHA256 debd59bfd83f4e3bf6d46ab765ddcecbd5b012bbdaf7a70992e30bb61788108d
        • MD5 SHA1 SHA512 SSDEEP TLSH

        RCXCAEA.tmp

        • Path C:\Program Files (x86)\Mozilla Maintenance Service\RCXCAEA.tmp
        • Size 100KB
        • SHA256 bdceb9e837e1a85499fabe3f1922e940c0d3640fddc41405bfc15fefa6803779
        • MD5 SHA1 SHA512 SSDEEP TLSH

        7z.exe.Exe

        • Path C:\Program Files\7-Zip\7z.exe.Exe
        • Size 642KB
        • SHA256 4a0b9fdba6ab076c0ba2fe55c457573f9ef28c7a7d2bf0de6798800cdc12c859
        • MD5 SHA1 SHA512 SSDEEP TLSH

        RCXBA1D.tmp

        • Path C:\Program Files\Java\jdk-1.8\bin\RCXBA1D.tmp
        • Size 92KB
        • SHA256 95b58b1bb4e346097c05224d0558436766b1432a47e4da2a15883a26fa6cc060
        • MD5 SHA1 SHA512 SSDEEP TLSH

        RCXBC9F.tmp

        • Path C:\Program Files\Microsoft Office 15\ClientX64\RCXBC9F.tmp
        • Size 156KB
        • SHA256 96410eb53e01340ba888b07f9665d3c6e39c4765cc76cfe2f85827377e73cca0
        • MD5 SHA1 SHA512 SSDEEP TLSH

        RCXBCD1.tmp

        • Path C:\Program Files\Mozilla Firefox\RCXBCD1.tmp
        • Size 91KB
        • SHA256 1ab4367223cc23c360dc46a5cd9ea1c90b2bd7ef2b385f05be5189321dce4e36
        • MD5 SHA1 SHA512 SSDEEP TLSH

        RCXCF51.tmp

        • Path C:\ProgramData\Package Cache\{33d1fd90-4274-48a1-9bc1-97e33d9c2d6f}\RCXCF51.tmp
        • Size 92KB
        • SHA256 8c78d28fb87eccd31fba9436f8035db18a25ee08ad3c71cc1312117356efe10f
        • MD5 SHA1 SHA512 SSDEEP TLSH

        $$a2B9F.bat

        • Path C:\Users\Admin\AppData\Local\Temp\$$a2B9F.bat
        • Size 902B
        • SHA256 ed56a06a4213e80c963bc655fcca27ec00b6db77d665b3337a0f80f1700e374b
        • MD5 SHA1 SHA512 TLSH

        2026-05-31_9a69a4bef47f5f59d4cafc2efe203ff8_cobalt-strike_elex_hijackloader_icedid_njrat_vidar.exe.exe

        • Path C:\Users\Admin\AppData\Local\Temp\2026-05-31_9a69a4bef47f5f59d4cafc2efe203ff8_cobalt-strike_elex_hijackloader_icedid_njrat_vidar.exe.exe
        • Size 5.8MB
        • SHA256 949e4af3e2606039f10f991a4f4bea460988621c68351fe3c0a3df3d38465a3d
        • MD5 SHA1 SHA512 SSDEEP TLSH

        Logo1_.exe

        • Path C:\Windows\Logo1_.exe
        • Size 93KB
        • SHA256 1889666e905b6304b7f75c66d5816d0fe6b3db6ebc315c4be26b197bd303ce31
        • MD5 SHA1 SHA512 SSDEEP TLSH

        hosts

        • Path C:\Windows\system32\drivers\etc\hosts
        • Size 842B
        • SHA256 d9704dab05e988be3e5e7b7c020bb9814906d11bb9c31ad80d4ed1316f6bc94e
        • MD5 SHA1 SHA512 TLSH

        memory/4168-0-0x0000000000400000-0x0000000000429000-memory.dmp

        memory/4168-12-0x0000000000400000-0x0000000000429000-memory.dmp

        memory/4196-22-0x0000000000400000-0x0000000000429000-memory.dmp

        memory/4196-857-0x0000000000400000-0x0000000000429000-memory.dmp

        memory/4196-10-0x0000000000400000-0x0000000000429000-memory.dmp

        memory/4196-1256-0x0000000000400000-0x0000000000429000-memory.dmp

        memory/4832-19-0x0000000000400000-0x0000000000429000-memory.dmp