Overview

overview

10

Static

static

10

I63f8affb2...ba.exe

windows7-x64

10

I63f8affb2...ba.exe

windows10-1703-x64

10

I63f8affb2...ba.exe

windows10-2004-x64

10

I63f8affb2...ba.exe

windows11-21h2-x64

10

Resubmissions

10-04-2024 02:45

240410-c88xlscb89 10

10-04-2024 02:45

240410-c88a3scb88 10

10-04-2024 02:45

240410-c8631scb86 10

10-04-2024 02:45

240410-c86ggscb85 10

14-10-2023 02:07

231014-cj7cgsba81 10

Analysis

  • max time kernel
    843s
  • max time network
    846s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    10-04-2024 02:45

Sharing

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General

  • Target

    I63f8affb2294c837814c33f5446924ba.exe

  • Size

    89KB

  • MD5

    dfb3936eb972928af9ec106505364786

  • SHA1

    06a05bf8d2675ea58e44d3fdc0d9e610be021ca8

  • SHA256

    2d1765fd2323db0b7a1b2a4413f793bb6b3a544ed7ba19c1b0d9c4db80747a93

  • SHA512

    e71c24d1804792be45281e70e97d909817e18d0948dcaf86b3e49d22d9f085278b8d043613f1fee0468a28f9e10218ac2cce3315e4c1575f242b324f606e950f

  • SSDEEP

    1536:/JVNAuC4/P1xAqm9wRC+IWMVYJGOupb1cus6SQsjhp5cNbMQaZ9bqk4gxmsuZmQ+:fN//HAqm9wRC+IWMVYJGOubXsjL5wvsD

Score
10/10
gurcucollectionspywarestealer

Malware Config

Signatures

  • Detect Gurcu Stealer V3 payload 3 IoCs
  • Gurcu, WhiteSnake

    Gurcu is a malware stealer written in C#.

    stealergurcu
  • Deletes itself 1 IoCs
  • Executes dropped EXE 2 IoCs
  • Reads WinSCP keys stored on the system 2 TTPs

    Tries to access WinSCP stored sessions.

    spywarestealer
  • Reads user/profile data of web browsers 2 TTPs

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

    spywarestealer
  • Accesses Microsoft Outlook profiles 1 TTPs 6 IoCs
    collection
  • Looks up external IP address via web service 1 IoCs

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

  • Enumerates physical storage devices 1 TTPs

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

  • Creates scheduled task(s) 1 TTPs 1 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

    persistence
  • Modifies system certificate store 2 TTPs 4 IoCs
    evasionspywaretrojan
  • Runs ping.exe 1 TTPs 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of WriteProcessMemory 24 IoCs
  • Uses Task Scheduler COM API 1 TTPs

    The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.

    persistence
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\I63f8affb2294c837814c33f5446924ba.exe
    "C:\Users\Admin\AppData\Local\Temp\I63f8affb2294c837814c33f5446924ba.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2144
    • C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /C chcp 65001 && ping 127.0.0.1 && schtasks /create /tn "I63f8affb2294c837814c33f5446924ba" /sc MINUTE /tr "C:\Users\Admin\AppData\Local\EsetSecurity\I63f8affb2294c837814c33f5446924ba.exe" /rl HIGHEST /f && DEL /F /S /Q /A "C:\Users\Admin\AppData\Local\Temp\I63f8affb2294c837814c33f5446924ba.exe" &&START "" "C:\Users\Admin\AppData\Local\EsetSecurity\I63f8affb2294c837814c33f5446924ba.exe"
      2⤵
      • Deletes itself
      • Suspicious use of WriteProcessMemory
      PID:2672
      • C:\Windows\system32\chcp.com
        chcp 65001
        3⤵
          PID:2572
        • C:\Windows\system32\PING.EXE
          ping 127.0.0.1
          3⤵
          • Runs ping.exe
          PID:2704
        • C:\Windows\system32\schtasks.exe
          schtasks /create /tn "I63f8affb2294c837814c33f5446924ba" /sc MINUTE /tr "C:\Users\Admin\AppData\Local\EsetSecurity\I63f8affb2294c837814c33f5446924ba.exe" /rl HIGHEST /f
          3⤵
          • Creates scheduled task(s)
          PID:2668
        • C:\Users\Admin\AppData\Local\EsetSecurity\I63f8affb2294c837814c33f5446924ba.exe
          "C:\Users\Admin\AppData\Local\EsetSecurity\I63f8affb2294c837814c33f5446924ba.exe"
          3⤵
          • Executes dropped EXE
          • Accesses Microsoft Outlook profiles
          • Modifies system certificate store
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:2472
          • C:\Windows\system32\WerFault.exe
            C:\Windows\system32\WerFault.exe -u -p 2472 -s 3164
            4⤵
              PID:3052
      • C:\Windows\system32\taskeng.exe
        taskeng.exe {0AD8D30C-508E-4D92-A9AB-536DAB0AE15F} S-1-5-21-778096762-2241304387-192235952-1000:AYFLYVMK\Admin:Interactive:[1]
        1⤵
        • Suspicious use of WriteProcessMemory
        PID:2228
        • C:\Users\Admin\AppData\Local\EsetSecurity\I63f8affb2294c837814c33f5446924ba.exe
          C:\Users\Admin\AppData\Local\EsetSecurity\I63f8affb2294c837814c33f5446924ba.exe
          2⤵
          • Executes dropped EXE
          • Accesses Microsoft Outlook profiles
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          • outlook_office_path
          • outlook_win_path
          PID:1800
          • C:\Windows\system32\WerFault.exe
            C:\Windows\system32\WerFault.exe -u -p 1800 -s 3140
            3⤵
              PID:1488

        Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

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

          68KB

          MD5

          29f65ba8e88c063813cc50a4ea544e93

          SHA1

          05a7040d5c127e68c25d81cc51271ffb8bef3568

          SHA256

          1ed81fa8dfb6999a9fedc6e779138ffd99568992e22d300acd181a6d2c8de184

          SHA512

          e29b2e92c496245bed3372578074407e8ef8882906ce10c35b3c8deebfefe01b5fd7f3030acaa693e175f4b7aca6cd7d8d10ae1c731b09c5fa19035e005de3aa

          Download Submit

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

          344B

          MD5

          e3e993b99b8f6cfea260570b32b4a153

          SHA1

          05fae08909a2bbd972b0583ac8af23dbfa7f957d

          SHA256

          3702894816923831adf38a34d5ac211836e50ab79978039a8c993c72d867f0a1

          SHA512

          9f74dcc38e06b8f8afa12f7ea800fc626701c0eacee85005e8f545c9531cb2ed7b5b799cb2bb5188c57c743aaef1e10c21d33bc3475c9e70a7917825e6dbfa91

          Download Submit

        • C:\Users\Admin\AppData\Local\EsetSecurity\I63f8affb2294c837814c33f5446924ba.exe
          Filesize

          89KB

          MD5

          dfb3936eb972928af9ec106505364786

          SHA1

          06a05bf8d2675ea58e44d3fdc0d9e610be021ca8

          SHA256

          2d1765fd2323db0b7a1b2a4413f793bb6b3a544ed7ba19c1b0d9c4db80747a93

          SHA512

          e71c24d1804792be45281e70e97d909817e18d0948dcaf86b3e49d22d9f085278b8d043613f1fee0468a28f9e10218ac2cce3315e4c1575f242b324f606e950f

          Download Submit

        • C:\Users\Admin\AppData\Local\Temp\Cab7571.tmp
          Filesize

          65KB

          MD5

          ac05d27423a85adc1622c714f2cb6184

          SHA1

          b0fe2b1abddb97837ea0195be70ab2ff14d43198

          SHA256

          c6456e12e5e53287a547af4103e0397cb9697e466cf75844312dc296d43d144d

          SHA512

          6d0ef9050e41fbae680e0e59dd0f90b6ac7fea5579ef5708b69d5da33a0ece7e8b16574b58b17b64a34cc34a4ffc22b4a62c1ece61f36c4a11a0665e0536b90d

          Download Submit

        • C:\Users\Admin\AppData\Local\Temp\Tar7681.tmp
          Filesize

          177KB

          MD5

          435a9ac180383f9fa094131b173a2f7b

          SHA1

          76944ea657a9db94f9a4bef38f88c46ed4166983

          SHA256

          67dc37ed50b8e63272b49a254a6039ee225974f1d767bb83eb1fd80e759a7c34

          SHA512

          1a6b277611959720a9c71114957620517ad94541302f164eb872bd322292a952409bafb8bc2ac793b16ad5f25d83f8594ccff2b7834e3c2b2b941e6fc84c009a

          Download Submit

        • C:\Users\Admin\AppData\Local\Temp\installUtilLog.txt
          Filesize

          82B

          MD5

          1d2c0986ba3c3af924ad4b8776a45190

          SHA1

          e4199810598c592fb4304eb37cf90d2ce2065a11

          SHA256

          8f8cc850ea7e227ba100ad943c4c9000857e39d66a0aa6a245f599e6868d04c2

          SHA512

          275f4de2999bc947be2a179aab2ed6e33d7591d3464d3ba43d3ca1b6fc0ada3aae2090f39dc3620bfcfa57824e26aba7b401145137f87115bbd4c3589a291524

          Download Submit

        • C:\Users\Admin\AppData\Local\jdm9hu6p1h\port.dat
          Filesize

          4B

          MD5

          a8aa681aaa4588a8dbd3b42b26d59a1a

          SHA1

          8b1e80abca15b33ca7bf105e31725bfaa007c5f3

          SHA256

          4d578fd7ecf82962ceb689769e59d6abb4599a638ec14ac8f96b1fdf948cb60d

          SHA512

          f16f50f598f2cb317f35da8434a5448e71f40d78a8aa2711df836c1a31c46e19954d128f0d16604f2024348d2951b0488e76bfe0807de8ef336b6804357820ba

          Download Submit

        • memory/1800-104-0x000000001B120000-0x000000001B1A0000-memory.dmp

          Filesize

          512KB

          Download

        • memory/1800-103-0x000007FEF5390000-0x000007FEF5D7C000-memory.dmp

          Filesize

          9.9MB

          Download

        • memory/1800-128-0x000007FEF5390000-0x000007FEF5D7C000-memory.dmp

          Filesize

          9.9MB

          Download

        • memory/1800-129-0x000000001B120000-0x000000001B1A0000-memory.dmp

          Filesize

          512KB

          Download

        • memory/2144-2-0x000000001B1E0000-0x000000001B260000-memory.dmp

          Filesize

          512KB

          Download

        • memory/2144-5-0x000007FEF5D80000-0x000007FEF676C000-memory.dmp

          Filesize

          9.9MB

          Download

        • memory/2144-1-0x000007FEF5D80000-0x000007FEF676C000-memory.dmp

          Filesize

          9.9MB

          Download

        • memory/2144-0-0x0000000000EE0000-0x0000000000EFC000-memory.dmp

          Filesize

          112KB

          Download

        • memory/2472-10-0x000007FEF5390000-0x000007FEF5D7C000-memory.dmp

          Filesize

          9.9MB

          Download

        • memory/2472-9-0x0000000000910000-0x000000000092C000-memory.dmp

          Filesize

          112KB

          Download

        • memory/2472-127-0x000007FEF5390000-0x000007FEF5D7C000-memory.dmp

          Filesize

          9.9MB

          Download