Analysis

  • max time kernel
    150s
  • max time network
    151s
  • platform
    windows7_x64
  • resource
    win7v20210410
  • submitted
    03-05-2021 01:02

General

  • Target

    Factura Serfinanza050288227788749652817960744.exe

  • Size

    1.9MB

  • MD5

    65a849e00f8a9851b36707d010d5f644

  • SHA1

    451b90dab257396edebab0d6ef58eb62bd6cf25b

  • SHA256

    587df9036ffed6807865686f406ff26511a466562129803f75c5b8cd7e0f9839

  • SHA512

    588eae1907460475f68bb17783fb813dd4004ee9759b177e62efe1e22843796fee611082fa1873adf079e30523331d1f18be4295dca6fcef42002c806fb1bd2d

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 6 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 2 IoCs
  • Delays execution with timeout.exe 2 IoCs
  • Suspicious behavior: EnumeratesProcesses 16 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 4 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 58 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Factura Serfinanza050288227788749652817960744.exe
    "C:\Users\Admin\AppData\Local\Temp\Factura Serfinanza050288227788749652817960744.exe"
    1⤵
    • Suspicious use of NtSetInformationThreadHideFromDebugger
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1864
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c timeout 1
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:316
      • C:\Windows\SysWOW64\timeout.exe
        timeout 1
        3⤵
        • Delays execution with timeout.exe
        PID:840
    • C:\Users\Admin\AppData\Local\Temp\Factura Serfinanza050288227788749652817960744.exe
      "C:\Users\Admin\AppData\Local\Temp\Factura Serfinanza050288227788749652817960744.exe"
      2⤵
      • Adds Run key to start application
      • Suspicious use of WriteProcessMemory
      PID:1060
      • C:\Windows\SysWOW64\WScript.exe
        "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:720
        • 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:876
          • 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:440
            • C:\Windows\SysWOW64\cmd.exe
              "C:\Windows\System32\cmd.exe" /c timeout 1
              6⤵
              • Suspicious use of WriteProcessMemory
              PID:760
              • C:\Windows\SysWOW64\timeout.exe
                timeout 1
                7⤵
                • Delays execution with timeout.exe
                PID:1664
            • 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 use of SetWindowsHookEx
              PID:2044
            • C:\Windows\SysWOW64\WerFault.exe
              C:\Windows\SysWOW64\WerFault.exe -u -p 440 -s 888
              6⤵
              • Loads dropped DLL
              • Program crash
              • Suspicious behavior: EnumeratesProcesses
              • Suspicious behavior: GetForegroundWindowSpam
              • Suspicious use of AdjustPrivilegeToken
              PID:1632
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 1864 -s 888
      2⤵
      • Program crash
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: GetForegroundWindowSpam
      • Suspicious use of AdjustPrivilegeToken
      PID:380

Network

MITRE ATT&CK Matrix ATT&CK v6

Persistence

Registry Run Keys / Startup Folder

1
T1060

Defense Evasion

Modify Registry

1
T1112

Discovery

System Information Discovery

1
T1082

Replay Monitor

Loading Replay Monitor...

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

    65a849e00f8a9851b36707d010d5f644

    SHA1

    451b90dab257396edebab0d6ef58eb62bd6cf25b

    SHA256

    587df9036ffed6807865686f406ff26511a466562129803f75c5b8cd7e0f9839

    SHA512

    588eae1907460475f68bb17783fb813dd4004ee9759b177e62efe1e22843796fee611082fa1873adf079e30523331d1f18be4295dca6fcef42002c806fb1bd2d

  • C:\Users\Admin\AppData\Roaming\System32\PxxoServicesTrialNet1.exe
    MD5

    65a849e00f8a9851b36707d010d5f644

    SHA1

    451b90dab257396edebab0d6ef58eb62bd6cf25b

    SHA256

    587df9036ffed6807865686f406ff26511a466562129803f75c5b8cd7e0f9839

    SHA512

    588eae1907460475f68bb17783fb813dd4004ee9759b177e62efe1e22843796fee611082fa1873adf079e30523331d1f18be4295dca6fcef42002c806fb1bd2d

  • C:\Users\Admin\AppData\Roaming\System32\PxxoServicesTrialNet1.exe
    MD5

    65a849e00f8a9851b36707d010d5f644

    SHA1

    451b90dab257396edebab0d6ef58eb62bd6cf25b

    SHA256

    587df9036ffed6807865686f406ff26511a466562129803f75c5b8cd7e0f9839

    SHA512

    588eae1907460475f68bb17783fb813dd4004ee9759b177e62efe1e22843796fee611082fa1873adf079e30523331d1f18be4295dca6fcef42002c806fb1bd2d

  • \Users\Admin\AppData\Roaming\System32\PxxoServicesTrialNet1.exe
    MD5

    65a849e00f8a9851b36707d010d5f644

    SHA1

    451b90dab257396edebab0d6ef58eb62bd6cf25b

    SHA256

    587df9036ffed6807865686f406ff26511a466562129803f75c5b8cd7e0f9839

    SHA512

    588eae1907460475f68bb17783fb813dd4004ee9759b177e62efe1e22843796fee611082fa1873adf079e30523331d1f18be4295dca6fcef42002c806fb1bd2d

  • \Users\Admin\AppData\Roaming\System32\PxxoServicesTrialNet1.exe
    MD5

    65a849e00f8a9851b36707d010d5f644

    SHA1

    451b90dab257396edebab0d6ef58eb62bd6cf25b

    SHA256

    587df9036ffed6807865686f406ff26511a466562129803f75c5b8cd7e0f9839

    SHA512

    588eae1907460475f68bb17783fb813dd4004ee9759b177e62efe1e22843796fee611082fa1873adf079e30523331d1f18be4295dca6fcef42002c806fb1bd2d

  • \Users\Admin\AppData\Roaming\System32\PxxoServicesTrialNet1.exe
    MD5

    65a849e00f8a9851b36707d010d5f644

    SHA1

    451b90dab257396edebab0d6ef58eb62bd6cf25b

    SHA256

    587df9036ffed6807865686f406ff26511a466562129803f75c5b8cd7e0f9839

    SHA512

    588eae1907460475f68bb17783fb813dd4004ee9759b177e62efe1e22843796fee611082fa1873adf079e30523331d1f18be4295dca6fcef42002c806fb1bd2d

  • \Users\Admin\AppData\Roaming\System32\PxxoServicesTrialNet1.exe
    MD5

    65a849e00f8a9851b36707d010d5f644

    SHA1

    451b90dab257396edebab0d6ef58eb62bd6cf25b

    SHA256

    587df9036ffed6807865686f406ff26511a466562129803f75c5b8cd7e0f9839

    SHA512

    588eae1907460475f68bb17783fb813dd4004ee9759b177e62efe1e22843796fee611082fa1873adf079e30523331d1f18be4295dca6fcef42002c806fb1bd2d

  • \Users\Admin\AppData\Roaming\System32\PxxoServicesTrialNet1.exe
    MD5

    65a849e00f8a9851b36707d010d5f644

    SHA1

    451b90dab257396edebab0d6ef58eb62bd6cf25b

    SHA256

    587df9036ffed6807865686f406ff26511a466562129803f75c5b8cd7e0f9839

    SHA512

    588eae1907460475f68bb17783fb813dd4004ee9759b177e62efe1e22843796fee611082fa1873adf079e30523331d1f18be4295dca6fcef42002c806fb1bd2d

  • \Users\Admin\AppData\Roaming\System32\PxxoServicesTrialNet1.exe
    MD5

    65a849e00f8a9851b36707d010d5f644

    SHA1

    451b90dab257396edebab0d6ef58eb62bd6cf25b

    SHA256

    587df9036ffed6807865686f406ff26511a466562129803f75c5b8cd7e0f9839

    SHA512

    588eae1907460475f68bb17783fb813dd4004ee9759b177e62efe1e22843796fee611082fa1873adf079e30523331d1f18be4295dca6fcef42002c806fb1bd2d

  • memory/316-62-0x0000000000000000-mapping.dmp
  • memory/380-68-0x0000000000000000-mapping.dmp
  • memory/380-73-0x0000000000350000-0x0000000000351000-memory.dmp
    Filesize

    4KB

  • memory/440-77-0x0000000000000000-mapping.dmp
  • memory/440-89-0x0000000000600000-0x0000000000601000-memory.dmp
    Filesize

    4KB

  • memory/440-79-0x00000000013C0000-0x00000000013C1000-memory.dmp
    Filesize

    4KB

  • memory/720-69-0x0000000000000000-mapping.dmp
  • memory/760-82-0x0000000000000000-mapping.dmp
  • memory/840-63-0x0000000000000000-mapping.dmp
  • memory/876-74-0x0000000000000000-mapping.dmp
  • memory/1060-65-0x0000000000400000-0x0000000000422000-memory.dmp
    Filesize

    136KB

  • memory/1060-67-0x0000000076A81000-0x0000000076A83000-memory.dmp
    Filesize

    8KB

  • memory/1060-66-0x0000000000413FA4-mapping.dmp
  • memory/1060-72-0x0000000000400000-0x0000000000422000-memory.dmp
    Filesize

    136KB

  • memory/1632-88-0x0000000000000000-mapping.dmp
  • memory/1632-96-0x00000000003C0000-0x00000000003C1000-memory.dmp
    Filesize

    4KB

  • memory/1664-83-0x0000000000000000-mapping.dmp
  • memory/1864-59-0x0000000000E40000-0x0000000000E41000-memory.dmp
    Filesize

    4KB

  • memory/1864-64-0x0000000005F30000-0x0000000005F31000-memory.dmp
    Filesize

    4KB

  • memory/1864-61-0x0000000000410000-0x0000000000450000-memory.dmp
    Filesize

    256KB

  • memory/2044-85-0x0000000000413FA4-mapping.dmp
  • memory/2044-90-0x0000000000400000-0x0000000000422000-memory.dmp
    Filesize

    136KB