Analysis

  • max time kernel
    134s
  • max time network
    157s
  • platform
    windows7_x64
  • resource
    win7-20230220-en
  • resource tags

    arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
  • submitted
    05-05-2023 20:38

General

  • Target

    fdc83f58a30b80240c5887c6646324600f3896421059b80caddacfdb196287ea.exe

  • Size

    165KB

  • MD5

    547933c1a8ea0eb111e619d70ca2c657

  • SHA1

    aca394a095c3951ace115ac621a67df1ff4d2e33

  • SHA256

    fdc83f58a30b80240c5887c6646324600f3896421059b80caddacfdb196287ea

  • SHA512

    5df1b41c5f19e304cc0758b175252c17cc6ccb1d3d91ba2f153138dfbd8e2ef3cd6efe8a136559c55952bdb43a7f206f7ba4e04674ee95363ca8409e48745c2b

  • SSDEEP

    1536:ROwwIJbzij3pPEOGFmd8Szav8IDYFUxT1DR5jPVSBSVG41AG9wL4yXacCwPIC6Xi:RyIlz2p8Yai3GNzDeeb4FzeDGwKSHqj

Score
10/10

Malware Config

Extracted

Family

gurcu

C2

https://api.telegram.org/bot6193093056:AAHzyNGUGS9aUG6CCx6ENLoXpCFLzEQywIQ/sendMessage?chat_id=1098292643

Signatures

  • Gurcu, WhiteSnake

    Gurcu is a malware stealer written in C#.

  • Deletes itself 1 IoCs
  • Executes dropped EXE 2 IoCs
  • Reads user/profile data of web browsers 2 TTPs

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

  • Looks up external IP address via web service 2 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).

  • Program crash 2 IoCs
  • Creates scheduled task(s) 1 TTPs 1 IoCs

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

  • Modifies system certificate store 2 TTPs 6 IoCs
  • Runs ping.exe 1 TTPs 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 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.

Processes

  • C:\Users\Admin\AppData\Local\Temp\fdc83f58a30b80240c5887c6646324600f3896421059b80caddacfdb196287ea.exe
    "C:\Users\Admin\AppData\Local\Temp\fdc83f58a30b80240c5887c6646324600f3896421059b80caddacfdb196287ea.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1756
    • C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /C chcp 65001 && ping 127.0.0.1 && schtasks /create /tn "fdc83f58a30b80240c5887c6646324600f3896421059b80caddacfdb196287ea" /sc MINUTE /tr "C:\Users\Admin\AppData\Local\NET.Framework\fdc83f58a30b80240c5887c6646324600f3896421059b80caddacfdb196287ea.exe" /rl HIGHEST /f && DEL /F /S /Q /A "C:\Users\Admin\AppData\Local\Temp\fdc83f58a30b80240c5887c6646324600f3896421059b80caddacfdb196287ea.exe" &&START "" "C:\Users\Admin\AppData\Local\NET.Framework\fdc83f58a30b80240c5887c6646324600f3896421059b80caddacfdb196287ea.exe"
      2⤵
      • Deletes itself
      • Suspicious use of WriteProcessMemory
      PID:1984
      • C:\Windows\system32\chcp.com
        chcp 65001
        3⤵
          PID:468
        • C:\Windows\system32\PING.EXE
          ping 127.0.0.1
          3⤵
          • Runs ping.exe
          PID:1320
        • C:\Windows\system32\schtasks.exe
          schtasks /create /tn "fdc83f58a30b80240c5887c6646324600f3896421059b80caddacfdb196287ea" /sc MINUTE /tr "C:\Users\Admin\AppData\Local\NET.Framework\fdc83f58a30b80240c5887c6646324600f3896421059b80caddacfdb196287ea.exe" /rl HIGHEST /f
          3⤵
          • Creates scheduled task(s)
          PID:988
        • C:\Users\Admin\AppData\Local\NET.Framework\fdc83f58a30b80240c5887c6646324600f3896421059b80caddacfdb196287ea.exe
          "C:\Users\Admin\AppData\Local\NET.Framework\fdc83f58a30b80240c5887c6646324600f3896421059b80caddacfdb196287ea.exe"
          3⤵
          • Executes dropped EXE
          • Modifies system certificate store
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:1876
          • C:\Windows\system32\WerFault.exe
            C:\Windows\system32\WerFault.exe -u -p 1876 -s 1812
            4⤵
            • Program crash
            PID:1312
    • C:\Windows\system32\taskeng.exe
      taskeng.exe {B69336A8-3A3B-4890-8DF9-5F8DC9F8A25E} S-1-5-21-3948302646-268491222-1934009652-1000:KXZDHPUW\Admin:Interactive:[1]
      1⤵
      • Suspicious use of WriteProcessMemory
      PID:1720
      • C:\Users\Admin\AppData\Local\NET.Framework\fdc83f58a30b80240c5887c6646324600f3896421059b80caddacfdb196287ea.exe
        C:\Users\Admin\AppData\Local\NET.Framework\fdc83f58a30b80240c5887c6646324600f3896421059b80caddacfdb196287ea.exe
        2⤵
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:1320
        • C:\Windows\system32\WerFault.exe
          C:\Windows\system32\WerFault.exe -u -p 1320 -s 1796
          3⤵
          • Program crash
          PID:1896

    Network

    MITRE ATT&CK Enterprise v6

    Replay Monitor

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    Downloads

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

      Filesize

      62KB

      MD5

      3ac860860707baaf32469fa7cc7c0192

      SHA1

      c33c2acdaba0e6fa41fd2f00f186804722477639

      SHA256

      d015145d551ecd14916270efad773bbc9fd57fad2228d2c24559f696c961d904

      SHA512

      d62ad2408c969a95550fb87efda50f988770ba5e39972041bf85924275baf156b8bec309ecc6409e5acdd37ec175dea40eff921ab58933b5b5b5d35a6147567c

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

      Filesize

      62KB

      MD5

      3ac860860707baaf32469fa7cc7c0192

      SHA1

      c33c2acdaba0e6fa41fd2f00f186804722477639

      SHA256

      d015145d551ecd14916270efad773bbc9fd57fad2228d2c24559f696c961d904

      SHA512

      d62ad2408c969a95550fb87efda50f988770ba5e39972041bf85924275baf156b8bec309ecc6409e5acdd37ec175dea40eff921ab58933b5b5b5d35a6147567c

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

      Filesize

      344B

      MD5

      8537d7ae33ee47c16b9165ccf7545801

      SHA1

      79efcf849536341890f7ce631ef1af0551172aa7

      SHA256

      f18564d73ba299d45d3eeb83c2adbece6d2302de4f0eb373326a488b4f0cdabf

      SHA512

      6706ab354fb82661d1f131dcee4cd674e4c041bf633e6a16cae05143b7c5e29eb78701822ffdc864f28c83310ff352dd86148e40eab98c1dab957ff182d512d3

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

      Filesize

      344B

      MD5

      a12f825ce80f79e3fe0097f3c6774b3f

      SHA1

      519169154615fb93efa05e4b008b0fe85d407647

      SHA256

      03333fe8d73e3a1a28e0cd5be8954ac616dfc4e0bb449c8177303aacbf2e5dc3

      SHA512

      a98b87ab293de8da29ea12aac2ed01006492a255630f5ab01d36fd29f4010f416a12cd0d0d0f0f87c774ae9e1b4dfef8b4de0005f7f6ce06929cf618fbd7f483

    • C:\Users\Admin\AppData\Local\NET.Framework\fdc83f58a30b80240c5887c6646324600f3896421059b80caddacfdb196287ea.exe

      Filesize

      165KB

      MD5

      547933c1a8ea0eb111e619d70ca2c657

      SHA1

      aca394a095c3951ace115ac621a67df1ff4d2e33

      SHA256

      fdc83f58a30b80240c5887c6646324600f3896421059b80caddacfdb196287ea

      SHA512

      5df1b41c5f19e304cc0758b175252c17cc6ccb1d3d91ba2f153138dfbd8e2ef3cd6efe8a136559c55952bdb43a7f206f7ba4e04674ee95363ca8409e48745c2b

    • C:\Users\Admin\AppData\Local\NET.Framework\fdc83f58a30b80240c5887c6646324600f3896421059b80caddacfdb196287ea.exe

      Filesize

      165KB

      MD5

      547933c1a8ea0eb111e619d70ca2c657

      SHA1

      aca394a095c3951ace115ac621a67df1ff4d2e33

      SHA256

      fdc83f58a30b80240c5887c6646324600f3896421059b80caddacfdb196287ea

      SHA512

      5df1b41c5f19e304cc0758b175252c17cc6ccb1d3d91ba2f153138dfbd8e2ef3cd6efe8a136559c55952bdb43a7f206f7ba4e04674ee95363ca8409e48745c2b

    • C:\Users\Admin\AppData\Local\NET.Framework\fdc83f58a30b80240c5887c6646324600f3896421059b80caddacfdb196287ea.exe

      Filesize

      165KB

      MD5

      547933c1a8ea0eb111e619d70ca2c657

      SHA1

      aca394a095c3951ace115ac621a67df1ff4d2e33

      SHA256

      fdc83f58a30b80240c5887c6646324600f3896421059b80caddacfdb196287ea

      SHA512

      5df1b41c5f19e304cc0758b175252c17cc6ccb1d3d91ba2f153138dfbd8e2ef3cd6efe8a136559c55952bdb43a7f206f7ba4e04674ee95363ca8409e48745c2b

    • C:\Users\Admin\AppData\Local\Temp\Cab1D16.tmp

      Filesize

      61KB

      MD5

      fc4666cbca561e864e7fdf883a9e6661

      SHA1

      2f8d6094c7a34bf12ea0bbf0d51ee9c5bb7939a5

      SHA256

      10f3deb6c452d749a7451b5d065f4c0449737e5ee8a44f4d15844b503141e65b

      SHA512

      c71f54b571e01f247f072be4bbebdf5d8410b67eb79a61e7e0d9853fe857ab9bd12f53e6af3394b935560178107291fc4be351b27deb388eba90ba949633d57d

    • C:\Users\Admin\AppData\Local\Temp\Tar1E45.tmp

      Filesize

      164KB

      MD5

      4ff65ad929cd9a367680e0e5b1c08166

      SHA1

      c0af0d4396bd1f15c45f39d3b849ba444233b3a2

      SHA256

      c8733c93cc5aaf5ca206d06af22ee8dbdec764fb5085019a6a9181feb9dfdee6

      SHA512

      f530dc0d024a5a3b8903ffaaa41b608a5ccdd6da4ba1949f2c2e55a9fca475fec5c8d2119b5763cabe7ef1c3788fb9dcac621869db51d65b1d83cfe404fb4c27

    • C:\Users\Admin\AppData\Local\d92pmiifqt\port.dat

      Filesize

      4B

      MD5

      761efc843ff05ab74ed358713dd51c1b

      SHA1

      ee07861ec1b5b66ff87ab5adb0c412ef9a6e549f

      SHA256

      1adb67461a4c3739283e6b97ba7984e0d4b024a4dcbf1f341c389f0c581fde4a

      SHA512

      f0b33f84f14133417029461ee28fe392b90e06a7c0daa07c553c779dcaa072ce61d5a723a1db03b6f542f5a6f3f90ebd637b533151e2d8ff50cd2fb88dcaffce

    • memory/1320-132-0x000000001B2D0000-0x000000001B350000-memory.dmp

      Filesize

      512KB

    • memory/1756-54-0x0000000000C60000-0x0000000000C90000-memory.dmp

      Filesize

      192KB

    • memory/1756-55-0x000000001B1B0000-0x000000001B230000-memory.dmp

      Filesize

      512KB

    • memory/1876-61-0x0000000000390000-0x00000000003C0000-memory.dmp

      Filesize

      192KB