Analysis

  • max time kernel
    149s
  • max time network
    152s
  • platform
    windows7_x64
  • resource
    win7v20201028
  • submitted
    21-01-2021 10:16

General

  • Target

    SecuriteInfo.com.BehavesLike.Win32.Generic.tz.3504.exe

  • Size

    1.3MB

  • MD5

    33c35598a22a81d9d62986a910bc4d46

  • SHA1

    9177c4636517c04dad78521286ffe8928b3c8672

  • SHA256

    0a5a4665f8d532812a8c8992b8ecc0e58efb56e7730382268ca3ca65a0f74f38

  • SHA512

    4dba8eeb9f9d2861c13dd9107a90e98d89412ef815aa19ed502cc292d6afed79ff582bdc5faad1d9b9d74c73e887a5bb83a49c64c69e04cc53270bbb3fae03d0

Malware Config

Extracted

Family

remcos

C2

swryijgrvcsgkopnmcdertvgdswbvmophtfdczxs.ydns.eu:2017

Signatures

  • Remcos

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

  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 2 IoCs
  • Adds Run key to start application 2 TTPs 4 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious use of NtSetInformationThreadHideFromDebugger 15 IoCs
  • Suspicious use of SetThreadContext 2 IoCs
  • Program crash 1 IoCs
  • Delays execution with timeout.exe 6 IoCs
  • Suspicious behavior: EnumeratesProcesses 11 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 86 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.BehavesLike.Win32.Generic.tz.3504.exe
    "C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.BehavesLike.Win32.Generic.tz.3504.exe"
    1⤵
    • Suspicious use of NtSetInformationThreadHideFromDebugger
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1968
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c timeout 1
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1700
      • C:\Windows\SysWOW64\timeout.exe
        timeout 1
        3⤵
        • Delays execution with timeout.exe
        PID:1656
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c timeout 1
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:792
      • C:\Windows\SysWOW64\timeout.exe
        timeout 1
        3⤵
        • Delays execution with timeout.exe
        PID:1100
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c timeout 1
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:268
      • C:\Windows\SysWOW64\timeout.exe
        timeout 1
        3⤵
        • Delays execution with timeout.exe
        PID:576
    • C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.BehavesLike.Win32.Generic.tz.3504.exe
      "C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.BehavesLike.Win32.Generic.tz.3504.exe"
      2⤵
      • Adds Run key to start application
      • Suspicious use of WriteProcessMemory
      PID:584
      • C:\Windows\SysWOW64\WScript.exe
        "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:1132
        • C:\Windows\SysWOW64\cmd.exe
          "C:\Windows\System32\cmd.exe" /c "C:\Users\Admin\AppData\Roaming\vlc.exe"
          4⤵
          • Loads dropped DLL
          • Suspicious use of WriteProcessMemory
          PID:1068
          • C:\Users\Admin\AppData\Roaming\vlc.exe
            C:\Users\Admin\AppData\Roaming\vlc.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:1856
            • C:\Windows\SysWOW64\cmd.exe
              "C:\Windows\System32\cmd.exe" /c timeout 1
              6⤵
              • Suspicious use of WriteProcessMemory
              PID:1120
              • C:\Windows\SysWOW64\timeout.exe
                timeout 1
                7⤵
                • Delays execution with timeout.exe
                PID:1596
            • C:\Windows\SysWOW64\cmd.exe
              "C:\Windows\System32\cmd.exe" /c timeout 1
              6⤵
              • Suspicious use of WriteProcessMemory
              PID:1696
              • C:\Windows\SysWOW64\timeout.exe
                timeout 1
                7⤵
                • Delays execution with timeout.exe
                PID:1172
            • C:\Windows\SysWOW64\cmd.exe
              "C:\Windows\System32\cmd.exe" /c timeout 1
              6⤵
                PID:532
                • C:\Windows\SysWOW64\timeout.exe
                  timeout 1
                  7⤵
                  • Delays execution with timeout.exe
                  PID:576
              • C:\Users\Admin\AppData\Roaming\vlc.exe
                "C:\Users\Admin\AppData\Roaming\vlc.exe"
                6⤵
                • Executes dropped EXE
                • Adds Run key to start application
                • Suspicious use of SetWindowsHookEx
                PID:1220
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -u -p 1968 -s 936
        2⤵
        • Program crash
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:992

    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

      0fd303b21c1a43c6a9078e6f5280ca85

      SHA1

      0db8f1ae34f4e2e72184e337951fde826c0bd26f

      SHA256

      5d8c6cfdf8fc198c4fd279487e5c1620ece89e39781c6337f4cb5e111e606ddc

      SHA512

      be4cdd48940bead0274c7cf08abd9bc75b5db468159cbf883198712d0bb15ad81a069638c628eba62237cfa0a197f845c0d9e1f4727c9608a8d642f7aba38671

    • C:\Users\Admin\AppData\Roaming\vlc.exe
      MD5

      33c35598a22a81d9d62986a910bc4d46

      SHA1

      9177c4636517c04dad78521286ffe8928b3c8672

      SHA256

      0a5a4665f8d532812a8c8992b8ecc0e58efb56e7730382268ca3ca65a0f74f38

      SHA512

      4dba8eeb9f9d2861c13dd9107a90e98d89412ef815aa19ed502cc292d6afed79ff582bdc5faad1d9b9d74c73e887a5bb83a49c64c69e04cc53270bbb3fae03d0

    • C:\Users\Admin\AppData\Roaming\vlc.exe
      MD5

      33c35598a22a81d9d62986a910bc4d46

      SHA1

      9177c4636517c04dad78521286ffe8928b3c8672

      SHA256

      0a5a4665f8d532812a8c8992b8ecc0e58efb56e7730382268ca3ca65a0f74f38

      SHA512

      4dba8eeb9f9d2861c13dd9107a90e98d89412ef815aa19ed502cc292d6afed79ff582bdc5faad1d9b9d74c73e887a5bb83a49c64c69e04cc53270bbb3fae03d0

    • C:\Users\Admin\AppData\Roaming\vlc.exe
      MD5

      33c35598a22a81d9d62986a910bc4d46

      SHA1

      9177c4636517c04dad78521286ffe8928b3c8672

      SHA256

      0a5a4665f8d532812a8c8992b8ecc0e58efb56e7730382268ca3ca65a0f74f38

      SHA512

      4dba8eeb9f9d2861c13dd9107a90e98d89412ef815aa19ed502cc292d6afed79ff582bdc5faad1d9b9d74c73e887a5bb83a49c64c69e04cc53270bbb3fae03d0

    • \Users\Admin\AppData\Roaming\vlc.exe
      MD5

      33c35598a22a81d9d62986a910bc4d46

      SHA1

      9177c4636517c04dad78521286ffe8928b3c8672

      SHA256

      0a5a4665f8d532812a8c8992b8ecc0e58efb56e7730382268ca3ca65a0f74f38

      SHA512

      4dba8eeb9f9d2861c13dd9107a90e98d89412ef815aa19ed502cc292d6afed79ff582bdc5faad1d9b9d74c73e887a5bb83a49c64c69e04cc53270bbb3fae03d0

    • \Users\Admin\AppData\Roaming\vlc.exe
      MD5

      33c35598a22a81d9d62986a910bc4d46

      SHA1

      9177c4636517c04dad78521286ffe8928b3c8672

      SHA256

      0a5a4665f8d532812a8c8992b8ecc0e58efb56e7730382268ca3ca65a0f74f38

      SHA512

      4dba8eeb9f9d2861c13dd9107a90e98d89412ef815aa19ed502cc292d6afed79ff582bdc5faad1d9b9d74c73e887a5bb83a49c64c69e04cc53270bbb3fae03d0

    • memory/268-11-0x0000000000000000-mapping.dmp
    • memory/532-39-0x0000000000000000-mapping.dmp
    • memory/576-12-0x0000000000000000-mapping.dmp
    • memory/576-40-0x0000000000000000-mapping.dmp
    • memory/584-19-0x0000000000400000-0x0000000000421000-memory.dmp
      Filesize

      132KB

    • memory/584-13-0x0000000000400000-0x0000000000421000-memory.dmp
      Filesize

      132KB

    • memory/584-14-0x0000000000413FA4-mapping.dmp
    • memory/584-15-0x0000000075ED1000-0x0000000075ED3000-memory.dmp
      Filesize

      8KB

    • memory/792-9-0x0000000000000000-mapping.dmp
    • memory/992-22-0x0000000000240000-0x0000000000241000-memory.dmp
      Filesize

      4KB

    • memory/992-18-0x0000000002250000-0x0000000002261000-memory.dmp
      Filesize

      68KB

    • memory/992-16-0x0000000000000000-mapping.dmp
    • memory/1068-23-0x0000000000000000-mapping.dmp
    • memory/1100-10-0x0000000000000000-mapping.dmp
    • memory/1120-34-0x0000000000000000-mapping.dmp
    • memory/1132-24-0x00000000028F0000-0x00000000028F4000-memory.dmp
      Filesize

      16KB

    • memory/1132-17-0x0000000000000000-mapping.dmp
    • memory/1172-38-0x0000000000000000-mapping.dmp
    • memory/1220-45-0x0000000000400000-0x0000000000421000-memory.dmp
      Filesize

      132KB

    • memory/1220-42-0x0000000000413FA4-mapping.dmp
    • memory/1596-35-0x0000000000000000-mapping.dmp
    • memory/1656-8-0x0000000000000000-mapping.dmp
    • memory/1696-37-0x0000000000000000-mapping.dmp
    • memory/1700-7-0x0000000000000000-mapping.dmp
    • memory/1856-31-0x0000000000D20000-0x0000000000D21000-memory.dmp
      Filesize

      4KB

    • memory/1856-36-0x0000000004D30000-0x0000000004D31000-memory.dmp
      Filesize

      4KB

    • memory/1856-30-0x0000000074200000-0x00000000748EE000-memory.dmp
      Filesize

      6.9MB

    • memory/1856-28-0x0000000000000000-mapping.dmp
    • memory/1968-6-0x0000000000700000-0x0000000000701000-memory.dmp
      Filesize

      4KB

    • memory/1968-5-0x00000000006D0000-0x0000000000700000-memory.dmp
      Filesize

      192KB

    • memory/1968-3-0x00000000009B0000-0x00000000009B1000-memory.dmp
      Filesize

      4KB

    • memory/1968-2-0x0000000074200000-0x00000000748EE000-memory.dmp
      Filesize

      6.9MB