Analysis

  • max time kernel
    143s
  • max time network
    131s
  • platform
    windows7_x64
  • resource
    win7-20240220-en
  • resource tags

    arch:x64arch:x86image:win7-20240220-enlocale:en-usos:windows7-x64system
  • submitted
    25-06-2024 14:07

General

  • Target

    crt.exe

  • Size

    5.1MB

  • MD5

    101f00585e773ec198e3e0721f0d582d

  • SHA1

    c1ca25c1f6e709f61596d2be1843a629b171dd59

  • SHA256

    6185fdacf0b903ea8bb2eee380a0c60e314ad7da93c7833b188c796f3f97b5be

  • SHA512

    15c06517403fd1d492b40f3c8a60c392dc6a6087e8b9610e022906b977dc45b9087ed3e7b2091ff8522b766c9f441da2797bb70fb7942400f699a9717402c556

  • SSDEEP

    98304:mkwXtlj7PeddJb7xJvyRgG6P7rTpc91us3KLCZTf9X8oK878t:2Laddz1ymG6P7rtcCSKLCZD93C

Malware Config

Extracted

Family

socks5systemz

C2

bheuiyo.com

http://bheuiyo.com/search/?q=67e28dd86554fa2a495aa4197c27d78406abdd88be4b12ebb517aa5c96bd86ed82df14d714bca5817673aa4de8889b5e4fa9281ae978a071ea771795af8e05c645db22f31df92d8b38e316a667d307eca743ec4c2b07b52966923a6e8dfd15c5ec96

http://bheuiyo.com/search/?q=67e28dd86554fa2a495aa4197c27d78406abdd88be4b12eab517aa5c96bd86e9938745885a8bbc896c58e713bc90c91836b5281fc235a925ed3e03d6bd974a95129070b616e96cc92be20ea778c255bbe258b90d3b4eed3233d1626a8ff810c9ec979e3ece6c

Signatures

  • Detect Socks5Systemz Payload 3 IoCs
  • Socks5Systemz

    Socks5Systemz is a botnet written in C++.

  • Executes dropped EXE 3 IoCs
  • Loads dropped DLL 5 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 FindShellTrayWindow 1 IoCs
  • Suspicious use of WriteProcessMemory 15 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\crt.exe
    "C:\Users\Admin\AppData\Local\Temp\crt.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of WriteProcessMemory
    PID:2792
    • C:\Users\Admin\AppData\Local\Temp\is-HRILE.tmp\crt.tmp
      "C:\Users\Admin\AppData\Local\Temp\is-HRILE.tmp\crt.tmp" /SL5="$500F8,5052624,54272,C:\Users\Admin\AppData\Local\Temp\crt.exe"
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of WriteProcessMemory
      PID:2144
      • C:\Users\Admin\AppData\Local\MP3 RIP Free Edition\mp3ripfreeedition32.exe
        "C:\Users\Admin\AppData\Local\MP3 RIP Free Edition\mp3ripfreeedition32.exe" -i
        3⤵
        • Executes dropped EXE
        PID:2596
      • C:\Users\Admin\AppData\Local\MP3 RIP Free Edition\mp3ripfreeedition32.exe
        "C:\Users\Admin\AppData\Local\MP3 RIP Free Edition\mp3ripfreeedition32.exe" -s
        3⤵
        • Executes dropped EXE
        PID:2604

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • \Users\Admin\AppData\Local\MP3 RIP Free Edition\mp3ripfreeedition32.exe

    Filesize

    3.2MB

    MD5

    9e75cd003585ff2f172a841d41ed6d75

    SHA1

    9d551f43cfeb84d1a585d53d2bdde8e17be436bc

    SHA256

    c576f2f3581928de1e62be3e4efff1b5c5415e89c3bdc0cd5536ce41a781c370

    SHA512

    817c32c8943325d27723274425c4fa5c3fb7f36c52a2c85f8038e956033edf96b5d9340df3238865b706fffd8094b1ba3e940bcc17e2feae24d1b15fe2fac67c

  • \Users\Admin\AppData\Local\Temp\is-HRILE.tmp\crt.tmp

    Filesize

    680KB

    MD5

    9a46eeaa9fb1370478ba7108b30aab2b

    SHA1

    045f0a44dd0f4710013a390da2865a2fac04389e

    SHA256

    71693251b98a555e6e01fcabf559218ad137f5de772218631147c3d87fc31820

    SHA512

    89ee61a63303ee11d77596e80e0abec6ede6c1fbba1b6bc6ee50991da335426b4fb0cc7d7a90c3c33d56dda222592a3090e771b9fcaef2f6e5951b78467fef66

  • \Users\Admin\AppData\Local\Temp\is-I8BDI.tmp\_isetup\_iscrypt.dll

    Filesize

    2KB

    MD5

    a69559718ab506675e907fe49deb71e9

    SHA1

    bc8f404ffdb1960b50c12ff9413c893b56f2e36f

    SHA256

    2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

    SHA512

    e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

  • \Users\Admin\AppData\Local\Temp\is-I8BDI.tmp\_isetup\_shfoldr.dll

    Filesize

    22KB

    MD5

    92dc6ef532fbb4a5c3201469a5b5eb63

    SHA1

    3e89ff837147c16b4e41c30d6c796374e0b8e62c

    SHA256

    9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87

    SHA512

    9908e573921d5dbc3454a1c0a6c969ab8a81cc2e8b5385391d46b1a738fb06a76aa3282e0e58d0d2ffa6f27c85668cd5178e1500b8a39b1bbae04366ae6a86d3

  • memory/2144-75-0x0000000000400000-0x00000000004BA000-memory.dmp

    Filesize

    744KB

  • memory/2144-80-0x0000000005A10000-0x0000000005D48000-memory.dmp

    Filesize

    3.2MB

  • memory/2144-12-0x0000000000400000-0x00000000004BA000-memory.dmp

    Filesize

    744KB

  • memory/2144-64-0x0000000005A10000-0x0000000005D48000-memory.dmp

    Filesize

    3.2MB

  • memory/2596-65-0x0000000000400000-0x0000000000738000-memory.dmp

    Filesize

    3.2MB

  • memory/2596-66-0x0000000000400000-0x0000000000738000-memory.dmp

    Filesize

    3.2MB

  • memory/2596-70-0x0000000000400000-0x0000000000738000-memory.dmp

    Filesize

    3.2MB

  • memory/2604-89-0x0000000000400000-0x0000000000738000-memory.dmp

    Filesize

    3.2MB

  • memory/2604-99-0x0000000000400000-0x0000000000738000-memory.dmp

    Filesize

    3.2MB

  • memory/2604-123-0x0000000000400000-0x0000000000738000-memory.dmp

    Filesize

    3.2MB

  • memory/2604-76-0x0000000000400000-0x0000000000738000-memory.dmp

    Filesize

    3.2MB

  • memory/2604-79-0x0000000000400000-0x0000000000738000-memory.dmp

    Filesize

    3.2MB

  • memory/2604-120-0x0000000000400000-0x0000000000738000-memory.dmp

    Filesize

    3.2MB

  • memory/2604-83-0x0000000000400000-0x0000000000738000-memory.dmp

    Filesize

    3.2MB

  • memory/2604-86-0x0000000000400000-0x0000000000738000-memory.dmp

    Filesize

    3.2MB

  • memory/2604-72-0x0000000000400000-0x0000000000738000-memory.dmp

    Filesize

    3.2MB

  • memory/2604-92-0x0000000000400000-0x0000000000738000-memory.dmp

    Filesize

    3.2MB

  • memory/2604-93-0x00000000023C0000-0x0000000002462000-memory.dmp

    Filesize

    648KB

  • memory/2604-116-0x00000000023C0000-0x0000000002462000-memory.dmp

    Filesize

    648KB

  • memory/2604-102-0x0000000000400000-0x0000000000738000-memory.dmp

    Filesize

    3.2MB

  • memory/2604-105-0x0000000000400000-0x0000000000738000-memory.dmp

    Filesize

    3.2MB

  • memory/2604-108-0x0000000000400000-0x0000000000738000-memory.dmp

    Filesize

    3.2MB

  • memory/2604-111-0x0000000000400000-0x0000000000738000-memory.dmp

    Filesize

    3.2MB

  • memory/2604-114-0x0000000000400000-0x0000000000738000-memory.dmp

    Filesize

    3.2MB

  • memory/2604-115-0x00000000023C0000-0x0000000002462000-memory.dmp

    Filesize

    648KB

  • memory/2792-74-0x0000000000400000-0x0000000000414000-memory.dmp

    Filesize

    80KB

  • memory/2792-0-0x0000000000400000-0x0000000000414000-memory.dmp

    Filesize

    80KB

  • memory/2792-2-0x0000000000401000-0x000000000040B000-memory.dmp

    Filesize

    40KB