Analysis

  • max time kernel
    141s
  • max time network
    131s
  • platform
    windows11-21h2_x64
  • resource
    win11-20240802-en
  • resource tags

    arch:x64arch:x86image:win11-20240802-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    03/08/2024, 18:53

General

  • Target

    crt.exe

  • Size

    3.8MB

  • MD5

    4087ac4aa59c087a40a7f6be6b1d1f41

  • SHA1

    ec07e43fbf9c80668f05f07c355381547f3662c7

  • SHA256

    0384c6409bb5afac939fef6bb65bb6e5ca9d61eee4f20652e754cf0410cb7ebb

  • SHA512

    b1ab2aeb5f38be4f45abf7f56096702e2f2b715c5f7602130f8dc64b3301684075a9d45b89d8b187005f7378626f60fc36c04c7f8e9d50880d625fd6d5308f4d

  • SSDEEP

    98304:NNF9XFgUtkpVLQ3gt3DPIYWYdRfIxbpjOsdIqbwjcOf12d3:hhFTqVM+3DUYdOxbEELbbOfQ9

Malware Config

Signatures

  • Detect Socks5Systemz Payload 3 IoCs
  • Socks5Systemz

    Socks5Systemz is a botnet written in C++.

  • Executes dropped EXE 3 IoCs
  • Loads dropped DLL 1 IoCs
  • Unexpected DNS network traffic destination 1 IoCs

    Network traffic to other servers than the configured DNS servers was detected on the DNS port.

  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

  • System Location Discovery: System Language Discovery 1 TTPs 4 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of WriteProcessMemory 9 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\crt.exe
    "C:\Users\Admin\AppData\Local\Temp\crt.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:5996
    • C:\Users\Admin\AppData\Local\Temp\is-9OCDI.tmp\crt.tmp
      "C:\Users\Admin\AppData\Local\Temp\is-9OCDI.tmp\crt.tmp" /SL5="$5020A,3727048,54272,C:\Users\Admin\AppData\Local\Temp\crt.exe"
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of WriteProcessMemory
      PID:2868
      • C:\Users\Admin\AppData\Local\Jeengle\jeengle32_64.exe
        "C:\Users\Admin\AppData\Local\Jeengle\jeengle32_64.exe" -i
        3⤵
        • Executes dropped EXE
        • System Location Discovery: System Language Discovery
        PID:2464
      • C:\Users\Admin\AppData\Local\Jeengle\jeengle32_64.exe
        "C:\Users\Admin\AppData\Local\Jeengle\jeengle32_64.exe" -s
        3⤵
        • Executes dropped EXE
        • System Location Discovery: System Language Discovery
        PID:3316

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

        • C:\Users\Admin\AppData\Local\Jeengle\jeengle32_64.exe

          Filesize

          4.4MB

          MD5

          4925ca5d4f92f8f94143c07230ad902e

          SHA1

          ee19d5ec9bf9ae559b8d9fdb5867fa82b69e56e8

          SHA256

          3630e5ae47900bd8039dd6fd7fd0cac05286b029504b01dcc9d122f449576965

          SHA512

          721118e2cdea68f407c48f3b04774a87aae65c1f3529b2149c49471d231fd0b8fe39125f654dda8d7f527901d8971595ba2ded8734bb27c986f94e2e4c59a4ee

        • C:\Users\Admin\AppData\Local\Temp\is-790KV.tmp\_isetup\_iscrypt.dll

          Filesize

          2KB

          MD5

          a69559718ab506675e907fe49deb71e9

          SHA1

          bc8f404ffdb1960b50c12ff9413c893b56f2e36f

          SHA256

          2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

          SHA512

          e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

        • C:\Users\Admin\AppData\Local\Temp\is-9OCDI.tmp\crt.tmp

          Filesize

          692KB

          MD5

          96e2c8db3dd8e1f3632aab3b400e4b9a

          SHA1

          4272048cddf5a17cee879c2c421f61e33baeff69

          SHA256

          624f7af3f2c4baa83666b9d02935116368c7660d5ee7059704f1d7279cde4cf2

          SHA512

          1d1642d10d31bf54e78fa6b3bba5e31b4fe745f1834d61dcf5ffd1d99934c1d7ba3ecc4832d0c3519380f5ded71632bf084ad4cfb3f74785e54d434508a8e984

        • memory/2464-57-0x0000000000400000-0x0000000000863000-memory.dmp

          Filesize

          4.4MB

        • memory/2464-52-0x0000000000400000-0x0000000000863000-memory.dmp

          Filesize

          4.4MB

        • memory/2464-53-0x0000000000400000-0x0000000000863000-memory.dmp

          Filesize

          4.4MB

        • memory/2464-55-0x0000000000400000-0x0000000000863000-memory.dmp

          Filesize

          4.4MB

        • memory/2868-62-0x0000000000400000-0x00000000004BD000-memory.dmp

          Filesize

          756KB

        • memory/2868-10-0x0000000000400000-0x00000000004BD000-memory.dmp

          Filesize

          756KB

        • memory/3316-66-0x0000000000400000-0x0000000000863000-memory.dmp

          Filesize

          4.4MB

        • memory/3316-86-0x0000000000400000-0x0000000000863000-memory.dmp

          Filesize

          4.4MB

        • memory/3316-110-0x0000000000400000-0x0000000000863000-memory.dmp

          Filesize

          4.4MB

        • memory/3316-107-0x0000000000400000-0x0000000000863000-memory.dmp

          Filesize

          4.4MB

        • memory/3316-63-0x0000000000400000-0x0000000000863000-memory.dmp

          Filesize

          4.4MB

        • memory/3316-103-0x0000000002690000-0x0000000002732000-memory.dmp

          Filesize

          648KB

        • memory/3316-69-0x0000000000400000-0x0000000000863000-memory.dmp

          Filesize

          4.4MB

        • memory/3316-72-0x0000000000400000-0x0000000000863000-memory.dmp

          Filesize

          4.4MB

        • memory/3316-75-0x0000000000400000-0x0000000000863000-memory.dmp

          Filesize

          4.4MB

        • memory/3316-78-0x0000000002690000-0x0000000002732000-memory.dmp

          Filesize

          648KB

        • memory/3316-81-0x0000000000400000-0x0000000000863000-memory.dmp

          Filesize

          4.4MB

        • memory/3316-60-0x0000000000400000-0x0000000000863000-memory.dmp

          Filesize

          4.4MB

        • memory/3316-89-0x0000000000400000-0x0000000000863000-memory.dmp

          Filesize

          4.4MB

        • memory/3316-92-0x0000000000400000-0x0000000000863000-memory.dmp

          Filesize

          4.4MB

        • memory/3316-95-0x0000000000400000-0x0000000000863000-memory.dmp

          Filesize

          4.4MB

        • memory/3316-98-0x0000000000400000-0x0000000000863000-memory.dmp

          Filesize

          4.4MB

        • memory/3316-101-0x0000000000400000-0x0000000000863000-memory.dmp

          Filesize

          4.4MB

        • memory/3316-102-0x0000000002690000-0x0000000002732000-memory.dmp

          Filesize

          648KB

        • memory/5996-1-0x0000000000400000-0x0000000000414000-memory.dmp

          Filesize

          80KB

        • memory/5996-2-0x0000000000401000-0x000000000040B000-memory.dmp

          Filesize

          40KB

        • memory/5996-61-0x0000000000400000-0x0000000000414000-memory.dmp

          Filesize

          80KB