Analysis

  • max time kernel
    149s
  • max time network
    93s
  • platform
    windows11-21h2_x64
  • resource
    win11-20260130-en
  • resource tags

    arch:x64arch:x86image:win11-20260130-enlocale:en-usos:windows11-21h2-x64systemwindows
  • submitted
    23/04/2026, 03:47

General

  • Target
    2026-04-23_83fccb2dfb1f2ebe0a77b0de7a2d72b6_akira_cobalt-strike_elex_hijackloader.exe
  • Size 770KB
  • Sample260423-ecbcksh19x
  • SHA256 204f66738798d4bb3b578625ba592539bd1450e069baa9fec145a30b4ab4148e
  • 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 3 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 9 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2026-04-23_83fccb2dfb1f2ebe0a77b0de7a2d72b6_akira_cobalt-strike_elex_hijackloader.exe
    "C:\Users\Admin\AppData\Local\Temp\2026-04-23_83fccb2dfb1f2ebe0a77b0de7a2d72b6_akira_cobalt-strike_elex_hijackloader.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:3408
    • C:\Windows\SysWOW64\net.exe
      net stop "Kingsoft AntiVirus Service"
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:4932
      • C:\Windows\SysWOW64\net1.exe
        C:\Windows\system32\net1 stop "Kingsoft AntiVirus Service"
        3⤵
        • System Location Discovery: System Language Discovery
        PID:912
    • C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c C:\Users\Admin\AppData\Local\Temp\$$a5F6.bat
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:484
      • C:\Users\Admin\AppData\Local\Temp\2026-04-23_83fccb2dfb1f2ebe0a77b0de7a2d72b6_akira_cobalt-strike_elex_hijackloader.exe
        "C:\Users\Admin\AppData\Local\Temp\2026-04-23_83fccb2dfb1f2ebe0a77b0de7a2d72b6_akira_cobalt-strike_elex_hijackloader.exe"
        3⤵
        • Executes dropped EXE
        PID:3092
    • 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:4948
      • C:\Windows\SysWOW64\net.exe
        net stop "Kingsoft AntiVirus Service"
        3⤵
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:2752
        • C:\Windows\SysWOW64\net1.exe
          C:\Windows\system32\net1 stop "Kingsoft AntiVirus Service"
          4⤵
          • System Location Discovery: System Language Discovery
          PID:4804
      • C:\Windows\SysWOW64\net.exe
        net stop "Kingsoft AntiVirus Service"
        3⤵
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:2908
        • C:\Windows\SysWOW64\net1.exe
          C:\Windows\system32\net1 stop "Kingsoft AntiVirus Service"
          4⤵
          • System Location Discovery: System Language Discovery
          PID:1324
  • 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:2724

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        RCXA397.tmp

        • Path C:\Program Files (x86)\Common Files\Adobe\ARM\1.0\RCXA397.tmp
        • Size 95KB
        • SHA256 b86a0b99d3333c2c6b98e498d75534100d767f863cad694f455cf7d622887f2c
        • MD5 SHA1 SHA512 SSDEEP TLSH

        RCXA5D6.tmp

        • Path C:\Program Files (x86)\Microsoft\EdgeCore\132.0.2957.140\RCXA5D6.tmp
        • Size 104KB
        • SHA256 cb7875bb6b3634123cad905915e4e43956b52050429e55a81cbdbf6a0b099fe0
        • MD5 SHA1 SHA512 SSDEEP TLSH

        RCXA6C8.tmp

        • Path C:\Program Files (x86)\Microsoft\EdgeUpdate_bk\RCXA6C8.tmp
        • Size 91KB
        • SHA256 f396591740014192661c164a65a9f0ceed159928854f5b92499391106139c96c
        • MD5 SHA1 SHA512 SSDEEP TLSH

        RCXA4CA.tmp

        • Path C:\Program Files (x86)\Microsoft\Edge\Application\139.0.3405.125\RCXA4CA.tmp
        • Size 119KB
        • SHA256 21bffead22748b13ad61a33cdc6a8c0e6f91adb509d3918a733176ae3af18c7d
        • MD5 SHA1 SHA512 SSDEEP TLSH

        RCXA7C2.tmp

        • Path C:\Program Files (x86)\Mozilla Maintenance Service\RCXA7C2.tmp
        • Size 101KB
        • SHA256 adef0c3cac4be2670a062ba4c0d306f76ed6b8e940f6f97f39ad80593a42537e
        • MD5 SHA1 SHA512 SSDEEP TLSH

        7z.exe.Exe

        • Path C:\Program Files\7-Zip\7z.exe.Exe
        • Size 642KB
        • SHA256 b98b356ad3a8ddbf953b3b12de229345879385f53745593ed2ccfd4081cc1105
        • MD5 SHA1 SHA512 SSDEEP TLSH

        RCX9354.tmp

        • Path C:\Program Files\7-Zip\RCX9354.tmp
        • Size 92KB
        • SHA256 e4c55f8e6dda590b3f0e353d91bc21ddf9402d9bd59945c5beeb52953227c43b
        • MD5 SHA1 SHA512 SSDEEP TLSH

        RCX9492.tmp

        • Path C:\Program Files\Java\jdk-1.8\bin\RCX9492.tmp
        • Size 93KB
        • SHA256 3090f92883dcd9a77d0295b20dd0cd584622e24c55897a173b59bfdbb0d3c3d8
        • MD5 SHA1 SHA512 SSDEEP TLSH

        OfficeClickToRun.exe.Exe

        • Path C:\Program Files\Microsoft Office 15\ClientX64\OfficeClickToRun.exe.Exe
        • Size 4.3MB
        • SHA256 9e363b6e2588773bc72e3ff546036b6e798459fddc6347edd8edb6b8c0d55003
        • MD5 SHA1 SHA512 SSDEEP TLSH

        RCXAC39.tmp

        • Path C:\ProgramData\Package Cache\{33d1fd90-4274-48a1-9bc1-97e33d9c2d6f}\RCXAC39.tmp
        • Size 93KB
        • SHA256 da0feb2e81c63513eff9533643e2daabb194c6cbb330eec3dc82bb1d8103aa67
        • MD5 SHA1 SHA512 SSDEEP TLSH

        $$a5F6.bat

        • Path C:\Users\Admin\AppData\Local\Temp\$$a5F6.bat
        • Size 823B
        • SHA256 80cf8bd600f12a868783a40763b41a5847cfa811b2cc00bab1bc5a7bbeb5a753
        • MD5 SHA1 SHA512 TLSH

        2026-04-23_83fccb2dfb1f2ebe0a77b0de7a2d72b6_akira_cobalt-strike_elex_hijackloader.exe.exe

        • Path C:\Users\Admin\AppData\Local\Temp\2026-04-23_83fccb2dfb1f2ebe0a77b0de7a2d72b6_akira_cobalt-strike_elex_hijackloader.exe.exe
        • Size 677KB
        • SHA256 fb6c0990e4976b9a98320e0912842ec11aa380a0f237affd35ef9ad2e7667905
        • MD5 SHA1 SHA512 SSDEEP TLSH

        Logo1_.exe

        • Path C:\Windows\Logo1_.exe
        • Size 93KB
        • SHA256 0a110b7760ee6446461182a49fea68bd2c812886d931a8a05008a84a16be7021
        • MD5 SHA1 SHA512 SSDEEP TLSH

        hosts

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

        memory/2724-16-0x0000000000400000-0x0000000000429000-memory.dmp

        memory/3408-10-0x0000000000400000-0x0000000000429000-memory.dmp

        memory/4948-19-0x0000000000400000-0x0000000000429000-memory.dmp

        memory/4948-890-0x0000000000400000-0x0000000000429000-memory.dmp

        memory/4948-1252-0x0000000000400000-0x0000000000429000-memory.dmp