Analysis

  • max time kernel
    151s
  • max time network
    149s
  • platform
    windows7_x64
  • resource
    win7v20210408
  • submitted
    06-05-2021 15:46

General

  • Target

    Factura Serfinanza_091060156_57614532_47411165355359140_4125802_77434958822958585231_35731076880_pdf.exe

  • Size

    1.8MB

  • MD5

    e13f7ded8bfc14808ca964c5dec10b9f

  • SHA1

    c5606c21b84a858ed7b54da2a7f17802fffcddb3

  • SHA256

    e8cac456b3e4a072d16142f0dd9f9b0500013cfefe7359e4293d4cff61f9eaf7

  • SHA512

    91d0cfb0e051c3ab5f8b97a5d8afb83476d825d7e87760a93220fd44cfd42c93b6b394341924521202988595e1a787586c087b614d8ab7df42563ccc2b490e7d

Score
10/10

Malware Config

Extracted

Family

remcos

C2

databasepropersonombrecomercialideasearchwords.services:3521

Signatures

  • Remcos

    Remcos is a closed-source remote control and surveillance software.

  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 1 IoCs
  • Adds Run key to start application 2 TTPs 4 IoCs
  • Suspicious use of NtSetInformationThreadHideFromDebugger 15 IoCs
  • Suspicious use of SetThreadContext 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Program crash 1 IoCs
  • Delays execution with timeout.exe 2 IoCs
  • Suspicious behavior: EnumeratesProcesses 11 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 54 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Factura Serfinanza_091060156_57614532_47411165355359140_4125802_77434958822958585231_35731076880_pdf.exe
    "C:\Users\Admin\AppData\Local\Temp\Factura Serfinanza_091060156_57614532_47411165355359140_4125802_77434958822958585231_35731076880_pdf.exe"
    1⤵
    • Suspicious use of NtSetInformationThreadHideFromDebugger
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:864
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c timeout 1
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1400
      • C:\Windows\SysWOW64\timeout.exe
        timeout 1
        3⤵
        • Delays execution with timeout.exe
        PID:600
    • C:\Users\Admin\AppData\Local\Temp\Factura Serfinanza_091060156_57614532_47411165355359140_4125802_77434958822958585231_35731076880_pdf.exe
      "C:\Users\Admin\AppData\Local\Temp\Factura Serfinanza_091060156_57614532_47411165355359140_4125802_77434958822958585231_35731076880_pdf.exe"
      2⤵
      • Adds Run key to start application
      • Suspicious use of WriteProcessMemory
      PID:1092
      • C:\Windows\SysWOW64\WScript.exe
        "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:1592
        • C:\Windows\SysWOW64\cmd.exe
          "C:\Windows\System32\cmd.exe" /c "C:\Users\Admin\AppData\Roaming\System32\PxxoServicesTrialNet1.exe"
          4⤵
          • Loads dropped DLL
          • Suspicious use of WriteProcessMemory
          PID:752
          • C:\Users\Admin\AppData\Roaming\System32\PxxoServicesTrialNet1.exe
            C:\Users\Admin\AppData\Roaming\System32\PxxoServicesTrialNet1.exe
            5⤵
            • Executes dropped EXE
            • Suspicious use of NtSetInformationThreadHideFromDebugger
            • Suspicious use of SetThreadContext
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            • Suspicious use of WriteProcessMemory
            PID:1144
            • C:\Windows\SysWOW64\cmd.exe
              "C:\Windows\System32\cmd.exe" /c timeout 1
              6⤵
              • Suspicious use of WriteProcessMemory
              PID:1488
              • C:\Windows\SysWOW64\timeout.exe
                timeout 1
                7⤵
                • Delays execution with timeout.exe
                PID:1656
            • C:\Users\Admin\AppData\Roaming\System32\PxxoServicesTrialNet1.exe
              "C:\Users\Admin\AppData\Roaming\System32\PxxoServicesTrialNet1.exe"
              6⤵
              • Executes dropped EXE
              • Adds Run key to start application
              • Suspicious behavior: GetForegroundWindowSpam
              • Suspicious use of SetWindowsHookEx
              PID:1616
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 864 -s 884
      2⤵
      • Program crash
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:1784

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\install.vbs

    MD5

    a39af763b1c09ead3c98a6a615f377fe

    SHA1

    9bd3d39c89e47fe7072270ecc80b810103235c03

    SHA256

    a3930d7535eb768523ee52bbe69f13f857a0ae0f982d7bfc354d802f21010f8f

    SHA512

    3ed8e33ac95fd2536286b4afb2ed2a082bb5f98843478262b32263a14a5dbe0425de7b8d9662a5e482b207ebf8484ace8009ecd1881a6f6f8b0ccf3b0fdfe5da

  • C:\Users\Admin\AppData\Roaming\System32\PxxoServicesTrialNet1.exe

    MD5

    e13f7ded8bfc14808ca964c5dec10b9f

    SHA1

    c5606c21b84a858ed7b54da2a7f17802fffcddb3

    SHA256

    e8cac456b3e4a072d16142f0dd9f9b0500013cfefe7359e4293d4cff61f9eaf7

    SHA512

    91d0cfb0e051c3ab5f8b97a5d8afb83476d825d7e87760a93220fd44cfd42c93b6b394341924521202988595e1a787586c087b614d8ab7df42563ccc2b490e7d

  • C:\Users\Admin\AppData\Roaming\System32\PxxoServicesTrialNet1.exe

    MD5

    e13f7ded8bfc14808ca964c5dec10b9f

    SHA1

    c5606c21b84a858ed7b54da2a7f17802fffcddb3

    SHA256

    e8cac456b3e4a072d16142f0dd9f9b0500013cfefe7359e4293d4cff61f9eaf7

    SHA512

    91d0cfb0e051c3ab5f8b97a5d8afb83476d825d7e87760a93220fd44cfd42c93b6b394341924521202988595e1a787586c087b614d8ab7df42563ccc2b490e7d

  • C:\Users\Admin\AppData\Roaming\System32\PxxoServicesTrialNet1.exe

    MD5

    e13f7ded8bfc14808ca964c5dec10b9f

    SHA1

    c5606c21b84a858ed7b54da2a7f17802fffcddb3

    SHA256

    e8cac456b3e4a072d16142f0dd9f9b0500013cfefe7359e4293d4cff61f9eaf7

    SHA512

    91d0cfb0e051c3ab5f8b97a5d8afb83476d825d7e87760a93220fd44cfd42c93b6b394341924521202988595e1a787586c087b614d8ab7df42563ccc2b490e7d

  • \Users\Admin\AppData\Roaming\System32\PxxoServicesTrialNet1.exe

    MD5

    e13f7ded8bfc14808ca964c5dec10b9f

    SHA1

    c5606c21b84a858ed7b54da2a7f17802fffcddb3

    SHA256

    e8cac456b3e4a072d16142f0dd9f9b0500013cfefe7359e4293d4cff61f9eaf7

    SHA512

    91d0cfb0e051c3ab5f8b97a5d8afb83476d825d7e87760a93220fd44cfd42c93b6b394341924521202988595e1a787586c087b614d8ab7df42563ccc2b490e7d

  • memory/600-65-0x0000000000000000-mapping.dmp

  • memory/752-75-0x0000000000000000-mapping.dmp

  • memory/864-60-0x00000000000B0000-0x00000000000B1000-memory.dmp

    Filesize

    4KB

  • memory/864-63-0x0000000005FB0000-0x0000000005FB1000-memory.dmp

    Filesize

    4KB

  • memory/864-62-0x0000000000440000-0x000000000047E000-memory.dmp

    Filesize

    248KB

  • memory/1092-66-0x0000000000400000-0x0000000000422000-memory.dmp

    Filesize

    136KB

  • memory/1092-67-0x0000000000413FA4-mapping.dmp

  • memory/1092-68-0x0000000075891000-0x0000000075893000-memory.dmp

    Filesize

    8KB

  • memory/1092-73-0x0000000000400000-0x0000000000422000-memory.dmp

    Filesize

    136KB

  • memory/1144-80-0x0000000000C50000-0x0000000000C51000-memory.dmp

    Filesize

    4KB

  • memory/1144-78-0x0000000000000000-mapping.dmp

  • memory/1144-85-0x0000000000460000-0x0000000000461000-memory.dmp

    Filesize

    4KB

  • memory/1400-64-0x0000000000000000-mapping.dmp

  • memory/1488-83-0x0000000000000000-mapping.dmp

  • memory/1592-69-0x0000000000000000-mapping.dmp

  • memory/1616-87-0x0000000000413FA4-mapping.dmp

  • memory/1616-90-0x0000000000400000-0x0000000000422000-memory.dmp

    Filesize

    136KB

  • memory/1656-84-0x0000000000000000-mapping.dmp

  • memory/1784-74-0x00000000021B0000-0x000000000238A000-memory.dmp

    Filesize

    1.9MB

  • memory/1784-70-0x0000000000000000-mapping.dmp