Analysis

  • max time kernel
    149s
  • max time network
    155s
  • platform
    windows7_x64
  • resource
    win7-20230831-en
  • resource tags

    arch:x64arch:x86image:win7-20230831-enlocale:en-usos:windows7-x64system
  • submitted
    14-10-2023 04:24

General

  • Target

    g8ae371b2e5be4d5d2d0c05.exe

  • Size

    290KB

  • MD5

    24acb6ae0ce3f02db7e54d5938e6fa0e

  • SHA1

    7da01643bf195b0b11e0afbcf0c4c65056c54627

  • SHA256

    fe3f4e398b6d08758c70582e76aaf99c5f917de8a05ad9d67a884a07f695f015

  • SHA512

    a4125cb350943943223f6def0e6a06b05bebc85d0af857a04471cc93c1a2f605fc305301a1d91814c31a4c58a4d973c3ae0180fffe15d4d2ae178fc845d7371e

  • SSDEEP

    6144:0GPJDpTxT8jWHgf8YJkVHC++VeQPBZnq0LZYSwFxQx9t0B9bdKoqeUIJkDa:7RpmWHgf8Y6/Qp1nLiDKkKyka

Malware Config

Signatures

  • Detect Gurcu Stealer V3 payload 1 IoCs
  • Gurcu, WhiteSnake

    Gurcu is a malware stealer written in C#.

  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs
  • Checks installed software on the system 1 TTPs

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

  • Looks up external IP address via web service 1 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Modifies system certificate store 2 TTPs 6 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 24 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\g8ae371b2e5be4d5d2d0c05.exe
    "C:\Users\Admin\AppData\Local\Temp\g8ae371b2e5be4d5d2d0c05.exe"
    1⤵
    • Accesses Microsoft Outlook profiles
    • Modifies system certificate store
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    • outlook_office_path
    • outlook_win_path
    PID:752
    • C:\Windows\system32\cmd.exe
      "cmd.exe" /c chcp 65001 && netsh wlan show profiles|findstr /R /C:"[ ]:[ ]"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2764
    • C:\Windows\system32\cmd.exe
      "cmd.exe" /c chcp 65001 && netsh wlan show networks mode=bssid | findstr "SSID BSSID Signal"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2492
  • C:\Windows\system32\findstr.exe
    findstr /R /C:"[ ]:[ ]"
    1⤵
      PID:3004
    • C:\Windows\system32\netsh.exe
      netsh wlan show profiles
      1⤵
        PID:2484
      • C:\Windows\system32\chcp.com
        chcp 65001
        1⤵
          PID:2736
        • C:\Windows\system32\chcp.com
          chcp 65001
          1⤵
            PID:2444
          • C:\Windows\system32\findstr.exe
            findstr "SSID BSSID Signal"
            1⤵
              PID:2460
            • C:\Windows\system32\netsh.exe
              netsh wlan show networks mode=bssid
              1⤵
                PID:2440

              Network

              MITRE ATT&CK Enterprise v15

              Replay Monitor

              Loading Replay Monitor...

              Downloads

              • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015

                Filesize

                344B

                MD5

                f942b4d0b8edbc48e59dafec017a7802

                SHA1

                98bf94f6c98f9f71cffb15d0fbbe76c603bac7b0

                SHA256

                5e1d2daf2e45fd716a955c9ba4f40734b0527cc1e7ac34bcab5c211abd7a2801

                SHA512

                49254adfbe1d9ff06073564e6e006a72bdf92a0ba51d0ae822e94cc32f9469445a3619dd52802db1b8c496049fce3fef95cc07915c5c039281745977963edeac

              • C:\Users\Admin\AppData\Local\Temp\CabC9E6.tmp

                Filesize

                61KB

                MD5

                f3441b8572aae8801c04f3060b550443

                SHA1

                4ef0a35436125d6821831ef36c28ffaf196cda15

                SHA256

                6720349e7d82ee0a8e73920d3c2b7cb2912d9fcf2edb6fd98f2f12820158b0bf

                SHA512

                5ba01ba421b50030e380ae6bbcd2f681f2a91947fe7fedb3c8e6b5f24dce9517abf57b1cf26cc6078d4bb53bde6fcfb2561591337c841f8f2cb121a3d71661b9

              • C:\Users\Admin\AppData\Local\Temp\TarCA75.tmp

                Filesize

                163KB

                MD5

                9441737383d21192400eca82fda910ec

                SHA1

                725e0d606a4fc9ba44aa8ffde65bed15e65367e4

                SHA256

                bc3a6e84e41faeb57e7c21aa3b60c2a64777107009727c5b7c0ed8fe658909e5

                SHA512

                7608dd653a66cd364392a78d4711b48d1707768d36996e4d38871c6843b5714e1d7da4b4cc6db969e6000cfa182bcb74216ef6823d1063f036fc5c3413fb8dcf

              • memory/752-0-0x0000000000CD0000-0x0000000000D1E000-memory.dmp

                Filesize

                312KB

              • memory/752-1-0x000007FEF5A20000-0x000007FEF640C000-memory.dmp

                Filesize

                9.9MB

              • memory/752-2-0x000000001B440000-0x000000001B4C0000-memory.dmp

                Filesize

                512KB

              • memory/752-3-0x000007FEF5A20000-0x000007FEF640C000-memory.dmp

                Filesize

                9.9MB