Analysis

  • max time kernel
    147s
  • max time network
    150s
  • platform
    windows11-21h2_x64
  • resource
    win11-20240730-en
  • resource tags

    arch:x64arch:x86image:win11-20240730-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    02/08/2024, 13:54

General

  • Target

    0b4c8d5b4c4506c0c43d974ca5ccb59942db38a629342e650d7e3f89d1ea9dca.exe

  • Size

    3.9MB

  • MD5

    4205a5ee0fe64320465bc614e61cbc47

  • SHA1

    576ad1914f3faed1990058c3e36260a2c952871e

  • SHA256

    0b4c8d5b4c4506c0c43d974ca5ccb59942db38a629342e650d7e3f89d1ea9dca

  • SHA512

    5a6af616255e92b86a7d86421cdcadb09b80840442b34e2932961742f8258815a4f2274d7e940f6f6d7397eb0a0b6dd16b49b291fb52a67a4cd858aa4d590a8e

  • SSDEEP

    98304:NFCS06WwrhQyLEhHWH/jUqD1pU/e5YJdpLxgzrd4:zfdWwHExkjUK1+/skpFmW

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\0b4c8d5b4c4506c0c43d974ca5ccb59942db38a629342e650d7e3f89d1ea9dca.exe
    "C:\Users\Admin\AppData\Local\Temp\0b4c8d5b4c4506c0c43d974ca5ccb59942db38a629342e650d7e3f89d1ea9dca.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3692
    • C:\Users\Admin\AppData\Local\Temp\is-BL65L.tmp\0b4c8d5b4c4506c0c43d974ca5ccb59942db38a629342e650d7e3f89d1ea9dca.tmp
      "C:\Users\Admin\AppData\Local\Temp\is-BL65L.tmp\0b4c8d5b4c4506c0c43d974ca5ccb59942db38a629342e650d7e3f89d1ea9dca.tmp" /SL5="$C0206,3868084,54272,C:\Users\Admin\AppData\Local\Temp\0b4c8d5b4c4506c0c43d974ca5ccb59942db38a629342e650d7e3f89d1ea9dca.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:4212
      • C:\Users\Admin\AppData\Local\AC3Filter\ac3filter32.exe
        "C:\Users\Admin\AppData\Local\AC3Filter\ac3filter32.exe" -i
        3⤵
        • Executes dropped EXE
        • System Location Discovery: System Language Discovery
        PID:2532
      • C:\Users\Admin\AppData\Local\AC3Filter\ac3filter32.exe
        "C:\Users\Admin\AppData\Local\AC3Filter\ac3filter32.exe" -s
        3⤵
        • Executes dropped EXE
        • System Location Discovery: System Language Discovery
        PID:2268

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

        • C:\Users\Admin\AppData\Local\AC3Filter\ac3filter32.exe

          Filesize

          4.4MB

          MD5

          cb679e0b550b3fdd8e510047e254a661

          SHA1

          d5625c912195642f80851fad83aa9b883ecafd5c

          SHA256

          5cfd9ac97432cb1bb64803749f842ecc421b8114125672a64c0d91f2943d82e0

          SHA512

          bf6345aa08e8e19dddd6b56d4c498f4337284537a4d18c54f105ae34716d6e5f1167288111a240d7c2e7f22d3b9aba5d861ce0e9806666f1f2660381a79693d5

        • C:\Users\Admin\AppData\Local\Temp\is-95QD2.tmp\_isetup\_iscrypt.dll

          Filesize

          2KB

          MD5

          a69559718ab506675e907fe49deb71e9

          SHA1

          bc8f404ffdb1960b50c12ff9413c893b56f2e36f

          SHA256

          2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

          SHA512

          e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

        • C:\Users\Admin\AppData\Local\Temp\is-BL65L.tmp\0b4c8d5b4c4506c0c43d974ca5ccb59942db38a629342e650d7e3f89d1ea9dca.tmp

          Filesize

          692KB

          MD5

          5ebe11e6392fab730e54dcb5c25aa498

          SHA1

          77d0199f1952ba98dc140c568ed0961dec98e77a

          SHA256

          dca15a70be4ddce976a38be4a643336de4a55a4156c33726da14d1108393171f

          SHA512

          0d81221530d7fa78a59abcb43784f1be39102da72d320ce97c6f56416d5f41bcf902f7bb2df93278d51125caaf6336cf8bd2dbfd9cdf9cb973e4d13c148d82e4

        • memory/2268-87-0x0000000000400000-0x000000000085D000-memory.dmp

          Filesize

          4.4MB

        • memory/2268-70-0x0000000000400000-0x000000000085D000-memory.dmp

          Filesize

          4.4MB

        • memory/2268-111-0x0000000000400000-0x000000000085D000-memory.dmp

          Filesize

          4.4MB

        • memory/2268-108-0x0000000000400000-0x000000000085D000-memory.dmp

          Filesize

          4.4MB

        • memory/2268-104-0x0000000000B70000-0x0000000000C12000-memory.dmp

          Filesize

          648KB

        • memory/2268-103-0x0000000000B70000-0x0000000000C12000-memory.dmp

          Filesize

          648KB

        • memory/2268-59-0x0000000000400000-0x000000000085D000-memory.dmp

          Filesize

          4.4MB

        • memory/2268-60-0x0000000000400000-0x000000000085D000-memory.dmp

          Filesize

          4.4MB

        • memory/2268-102-0x0000000000400000-0x000000000085D000-memory.dmp

          Filesize

          4.4MB

        • memory/2268-99-0x0000000000400000-0x000000000085D000-memory.dmp

          Filesize

          4.4MB

        • memory/2268-63-0x0000000000400000-0x000000000085D000-memory.dmp

          Filesize

          4.4MB

        • memory/2268-65-0x0000000000400000-0x000000000085D000-memory.dmp

          Filesize

          4.4MB

        • memory/2268-67-0x0000000000400000-0x000000000085D000-memory.dmp

          Filesize

          4.4MB

        • memory/2268-96-0x0000000000400000-0x000000000085D000-memory.dmp

          Filesize

          4.4MB

        • memory/2268-73-0x0000000000400000-0x000000000085D000-memory.dmp

          Filesize

          4.4MB

        • memory/2268-76-0x0000000000400000-0x000000000085D000-memory.dmp

          Filesize

          4.4MB

        • memory/2268-77-0x0000000000B70000-0x0000000000C12000-memory.dmp

          Filesize

          648KB

        • memory/2268-81-0x0000000000400000-0x000000000085D000-memory.dmp

          Filesize

          4.4MB

        • memory/2268-93-0x0000000000400000-0x000000000085D000-memory.dmp

          Filesize

          4.4MB

        • memory/2268-90-0x0000000000400000-0x000000000085D000-memory.dmp

          Filesize

          4.4MB

        • memory/2532-54-0x0000000000400000-0x000000000085D000-memory.dmp

          Filesize

          4.4MB

        • memory/2532-56-0x0000000000400000-0x000000000085D000-memory.dmp

          Filesize

          4.4MB

        • memory/2532-52-0x0000000000400000-0x000000000085D000-memory.dmp

          Filesize

          4.4MB

        • memory/3692-1-0x0000000000400000-0x0000000000414000-memory.dmp

          Filesize

          80KB

        • memory/3692-61-0x0000000000400000-0x0000000000414000-memory.dmp

          Filesize

          80KB

        • memory/3692-2-0x0000000000401000-0x000000000040B000-memory.dmp

          Filesize

          40KB

        • memory/4212-10-0x0000000000400000-0x00000000004BD000-memory.dmp

          Filesize

          756KB

        • memory/4212-62-0x0000000000400000-0x00000000004BD000-memory.dmp

          Filesize

          756KB