Analysis

  • max time kernel
    148s
  • max time network
    154s
  • platform
    windows11-21h2_x64
  • resource
    win11-20240221-en
  • resource tags

    arch:x64arch:x86image:win11-20240221-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    24/03/2024, 15:24

General

  • Target

    28a8077df899c3c22d4b57ee17971177350fd6b2ccf70868421fd56e1bab1140.exe

  • Size

    2.0MB

  • MD5

    b24a1a31cb5a2a81424b17d988145710

  • SHA1

    11794b1948f3efaf5074e3bf22301440003a33c9

  • SHA256

    28a8077df899c3c22d4b57ee17971177350fd6b2ccf70868421fd56e1bab1140

  • SHA512

    071539dc8fd14c89fe010f272277b47f95a855357983556aad100c77fd14170c1333a27f3b02fddb9689cf64d99ce05ff98cc2e5189d3311274924a9e5fc7c72

  • SSDEEP

    49152:3247n6RRtNoWh/PKGET6RAS3abv8dW6jI:m6n6RRtSWlK9uRf3GUdnI

Malware Config

Extracted

Family

socks5systemz

C2

http://bfiscke.com/search/?q=67e28dd83f08f2204807f9497c27d78406abdd88be4b12ebb517aa5c96bd86ed82df14d714bca5817673aa4be8889b5e4fa9281ae978ff71ea771795af8e05c645db22f31dfe339426fa12a466c553adb719a9577e55b8603e983a608ffe13c9ec9c9c33

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.

  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Suspicious use of WriteProcessMemory 9 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\28a8077df899c3c22d4b57ee17971177350fd6b2ccf70868421fd56e1bab1140.exe
    "C:\Users\Admin\AppData\Local\Temp\28a8077df899c3c22d4b57ee17971177350fd6b2ccf70868421fd56e1bab1140.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2576
    • C:\Users\Admin\AppData\Local\Temp\is-3OJPT.tmp\28a8077df899c3c22d4b57ee17971177350fd6b2ccf70868421fd56e1bab1140.tmp
      "C:\Users\Admin\AppData\Local\Temp\is-3OJPT.tmp\28a8077df899c3c22d4b57ee17971177350fd6b2ccf70868421fd56e1bab1140.tmp" /SL5="$9006A,1771305,54272,C:\Users\Admin\AppData\Local\Temp\28a8077df899c3c22d4b57ee17971177350fd6b2ccf70868421fd56e1bab1140.exe"
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Suspicious use of WriteProcessMemory
      PID:4472
      • C:\Users\Admin\AppData\Local\Site Free Edition\sitefreeedition.exe
        "C:\Users\Admin\AppData\Local\Site Free Edition\sitefreeedition.exe" -i
        3⤵
        • Executes dropped EXE
        PID:2956
      • C:\Users\Admin\AppData\Local\Site Free Edition\sitefreeedition.exe
        "C:\Users\Admin\AppData\Local\Site Free Edition\sitefreeedition.exe" -s
        3⤵
        • Executes dropped EXE
        PID:2408

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\Users\Admin\AppData\Local\Site Free Edition\sitefreeedition.exe

          Filesize

          2.0MB

          MD5

          9aa9c990c1d39b7d5a1bbfac8a1f9ea3

          SHA1

          217b23164048a1f7829eb22848714ad882aa30f2

          SHA256

          cae9f259144d1371674648a8b6606b542148e9a5cc500f878a02ef0fa59b8a3e

          SHA512

          28a98115017732b326a09464f8ff2f5daf397bc15a577a7d9b9d90c5ba282bc14425afda8f5fd09efe4ce6851769471f1c9c84f04d2d2095619bb24f8c2e4458

        • C:\Users\Admin\AppData\Local\Temp\is-3OJPT.tmp\28a8077df899c3c22d4b57ee17971177350fd6b2ccf70868421fd56e1bab1140.tmp

          Filesize

          677KB

          MD5

          5a1e3d46cb5a24f8e50b2a59d2ba1cf3

          SHA1

          fe86894c4757c144449bc744649b7fb9e03346f1

          SHA256

          d3a2c2ce7d70b3b9c30faf3f72bf4ebcdea8f331d6b6cac5dae906327997985d

          SHA512

          a27dc5c443abb31826b14e514aa717be5bf0f548b82170f79705f45ca28abaedc485c5b8738044735f61eca9e1f0ca659b519a3947551404085d07202ae709af

        • C:\Users\Admin\AppData\Local\Temp\is-SAGG4.tmp\_isetup\_iscrypt.dll

          Filesize

          2KB

          MD5

          a69559718ab506675e907fe49deb71e9

          SHA1

          bc8f404ffdb1960b50c12ff9413c893b56f2e36f

          SHA256

          2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

          SHA512

          e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

        • memory/2408-77-0x0000000000400000-0x0000000000601000-memory.dmp

          Filesize

          2.0MB

        • memory/2408-78-0x00000000009A0000-0x0000000000A42000-memory.dmp

          Filesize

          648KB

        • memory/2408-97-0x0000000000400000-0x0000000000601000-memory.dmp

          Filesize

          2.0MB

        • memory/2408-94-0x0000000000400000-0x0000000000601000-memory.dmp

          Filesize

          2.0MB

        • memory/2408-90-0x0000000000400000-0x0000000000601000-memory.dmp

          Filesize

          2.0MB

        • memory/2408-87-0x0000000000400000-0x0000000000601000-memory.dmp

          Filesize

          2.0MB

        • memory/2408-84-0x0000000000400000-0x0000000000601000-memory.dmp

          Filesize

          2.0MB

        • memory/2408-46-0x0000000000400000-0x0000000000601000-memory.dmp

          Filesize

          2.0MB

        • memory/2408-81-0x0000000000400000-0x0000000000601000-memory.dmp

          Filesize

          2.0MB

        • memory/2408-63-0x0000000000400000-0x0000000000601000-memory.dmp

          Filesize

          2.0MB

        • memory/2408-49-0x0000000000400000-0x0000000000601000-memory.dmp

          Filesize

          2.0MB

        • memory/2408-74-0x0000000000400000-0x0000000000601000-memory.dmp

          Filesize

          2.0MB

        • memory/2408-53-0x0000000000400000-0x0000000000601000-memory.dmp

          Filesize

          2.0MB

        • memory/2408-54-0x0000000000400000-0x0000000000601000-memory.dmp

          Filesize

          2.0MB

        • memory/2408-60-0x0000000000400000-0x0000000000601000-memory.dmp

          Filesize

          2.0MB

        • memory/2408-67-0x00000000009A0000-0x0000000000A42000-memory.dmp

          Filesize

          648KB

        • memory/2408-57-0x0000000000400000-0x0000000000601000-memory.dmp

          Filesize

          2.0MB

        • memory/2408-66-0x0000000000400000-0x0000000000601000-memory.dmp

          Filesize

          2.0MB

        • memory/2408-68-0x00000000009A0000-0x0000000000A42000-memory.dmp

          Filesize

          648KB

        • memory/2576-0-0x0000000000400000-0x0000000000414000-memory.dmp

          Filesize

          80KB

        • memory/2576-47-0x0000000000400000-0x0000000000414000-memory.dmp

          Filesize

          80KB

        • memory/2576-2-0x0000000000400000-0x0000000000414000-memory.dmp

          Filesize

          80KB

        • memory/2956-42-0x0000000000400000-0x0000000000601000-memory.dmp

          Filesize

          2.0MB

        • memory/2956-43-0x0000000000400000-0x0000000000601000-memory.dmp

          Filesize

          2.0MB

        • memory/2956-39-0x0000000000400000-0x0000000000601000-memory.dmp

          Filesize

          2.0MB

        • memory/2956-38-0x0000000000400000-0x0000000000601000-memory.dmp

          Filesize

          2.0MB

        • memory/4472-7-0x0000000002340000-0x0000000002341000-memory.dmp

          Filesize

          4KB

        • memory/4472-50-0x0000000002340000-0x0000000002341000-memory.dmp

          Filesize

          4KB

        • memory/4472-48-0x0000000000400000-0x00000000004B8000-memory.dmp

          Filesize

          736KB