Analysis

  • max time kernel
    148s
  • max time network
    151s
  • platform
    windows7_x64
  • resource
    win7v20210410
  • submitted
    13-04-2021 07:02

General

  • Target

    Devis de commande urgent SDX88467638,pdf.exe

  • Size

    838KB

  • MD5

    3cbd690be25928be30b522ad04785ef5

  • SHA1

    e2f8ab8ceaaa0bf2a65fd8291f1355a58ad66561

  • SHA256

    2644d67e0fbbce929f70bdc4c07912617a2a65e611faeb72acd51a091e529a5e

  • SHA512

    388334e5ddc09edaefffa1050c6c2e6a5bbc88c24d1973b0fbfbb69a8fcace4d985e8166bbebc5d767749fde55b8fd2251f9bd9f6499f8f984c14f1d59c9a9e7

Malware Config

Extracted

Family

remcos

C2

ongod4life.ddns.net:4344

Signatures

  • ModiLoader, DBatLoader

    ModiLoader is a Delphi loader that misuses cloud services to download other malicious families.

  • Remcos

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

  • Executes dropped EXE 2 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Enumerates connected drives 3 TTPs 24 IoCs

    Attempts to read the root path of hard drives other than the default C: drive.

  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious use of WriteProcessMemory 27 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Devis de commande urgent SDX88467638,pdf.exe
    "C:\Users\Admin\AppData\Local\Temp\Devis de commande urgent SDX88467638,pdf.exe"
    1⤵
    • Adds Run key to start application
    • Enumerates connected drives
    • Suspicious use of WriteProcessMemory
    PID:1676
    • C:\Program Files (x86)\internet explorer\ieinstal.exe
      "C:\Program Files (x86)\internet explorer\ieinstal.exe"
      2⤵
        PID:672
      • C:\Windows\SysWOW64\cmd.exe
        cmd /c ""C:\Users\Public\stt.bat" "
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:1140
        • C:\Windows\SysWOW64\cmd.exe
          C:\Windows\system32\cmd.exe /K C:\Users\Public\PXOR.bat
          3⤵
            PID:1784
            • C:\Windows \System32\Netplwiz.exe
              "C:\Windows \System32\Netplwiz.exe"
              4⤵
              • Executes dropped EXE
              PID:556
            • C:\Windows \System32\Netplwiz.exe
              "C:\Windows \System32\Netplwiz.exe"
              4⤵
              • Executes dropped EXE
              PID:904

      Network

      MITRE ATT&CK Matrix ATT&CK v6

      Persistence

      Registry Run Keys / Startup Folder

      1
      T1060

      Defense Evasion

      Modify Registry

      1
      T1112

      Discovery

      Query Registry

      1
      T1012

      Peripheral Device Discovery

      1
      T1120

      System Information Discovery

      2
      T1082

      Replay Monitor

      Loading Replay Monitor...

      Downloads

      • C:\Users\Public\NETUTILS.dll
        MD5

        39507d772c63ca496a25a14a8b5d14b2

        SHA1

        5b603f5c11eb9ab4313694315b4d4894ff4641d4

        SHA256

        36d1fa474cd8271f9b74b9481025614b6ff309f767f69d9f1ff3960c7205ad12

        SHA512

        0c740fd7b6d67d9938b0d8e1ea7d6c41910dd6d0b85b4ec8b6015ff8c0c73798dee01f01da0b5b0c07038663aca7945faca0e2b5afc1cb751aaba7567d332f5f

      • C:\Users\Public\Netplwiz.exe
        MD5

        f94b7fb6dac49844d03c7087b2d8b472

        SHA1

        0e84139fced0ee8ef929d0bd5f01559a7dcf1db0

        SHA256

        46e31f337ed0d9a6fe3f159abc91c9b9b6a6062982bbcd84a51784d7128e7ae4

        SHA512

        d63878f94f7699e4cc63c2cd885c29455e0c423d32dba750e4fc3aa74dbaca80a1a4b176719213b9fc6584de6a40cddff7864c7fb4cfba13dfcb437a36e41b80

      • C:\Users\Public\PXOR.bat
        MD5

        0d8aef656413642f55e0902cc5df5e6f

        SHA1

        73ec56d08bd9b3c45d55c97bd1c1286b77c8ff49

        SHA256

        670f94b92f45bc2f3f44a80c7f3021f874aa16fde38ed7d7f3ebed13ae09fa11

        SHA512

        efe690b1bcf06e16be469622b45c98b5dc1f1e06410cbf7e7dccb2975524c4d6bc7e23de9a129d50d73cd924f02e23f925555894f2c7da1064dcc57151f50876

      • C:\Users\Public\stt.bat
        MD5

        8a850253c31df9a7e1c00c80df2630d5

        SHA1

        e3da74081b027a3b591488b28da22742bcfe8495

        SHA256

        8fdeba3ec903bde700342083d16f72452366aa0b1b30d0e58dee0af74cebfa35

        SHA512

        30510bdc34680a0865a0811d9be29dec91c74717feccd58c9b4d88e77be9e5d13a539806a1b2901aff595b2fe2cc45926b69ed42e899d2dd2913c78a732e84d1

      • C:\Windows \System32\Netplwiz.exe
        MD5

        f94b7fb6dac49844d03c7087b2d8b472

        SHA1

        0e84139fced0ee8ef929d0bd5f01559a7dcf1db0

        SHA256

        46e31f337ed0d9a6fe3f159abc91c9b9b6a6062982bbcd84a51784d7128e7ae4

        SHA512

        d63878f94f7699e4cc63c2cd885c29455e0c423d32dba750e4fc3aa74dbaca80a1a4b176719213b9fc6584de6a40cddff7864c7fb4cfba13dfcb437a36e41b80

      • C:\Windows \System32\Netplwiz.exe
        MD5

        f94b7fb6dac49844d03c7087b2d8b472

        SHA1

        0e84139fced0ee8ef929d0bd5f01559a7dcf1db0

        SHA256

        46e31f337ed0d9a6fe3f159abc91c9b9b6a6062982bbcd84a51784d7128e7ae4

        SHA512

        d63878f94f7699e4cc63c2cd885c29455e0c423d32dba750e4fc3aa74dbaca80a1a4b176719213b9fc6584de6a40cddff7864c7fb4cfba13dfcb437a36e41b80

      • memory/672-76-0x0000000000110000-0x0000000000111000-memory.dmp
        Filesize

        4KB

      • memory/672-65-0x0000000000000000-mapping.dmp
      • memory/672-78-0x0000000000280000-0x0000000000281000-memory.dmp
        Filesize

        4KB

      • memory/672-79-0x0000000010540000-0x0000000010564000-memory.dmp
        Filesize

        144KB

      • memory/672-80-0x0000000000400000-0x0000000000422000-memory.dmp
        Filesize

        136KB

      • memory/672-81-0x00000000000D0000-0x00000000000D1000-memory.dmp
        Filesize

        4KB

      • memory/1140-67-0x0000000000000000-mapping.dmp
      • memory/1676-64-0x0000000075971000-0x0000000075973000-memory.dmp
        Filesize

        8KB

      • memory/1676-61-0x00000000003E0000-0x00000000003FA000-memory.dmp
        Filesize

        104KB

      • memory/1676-59-0x0000000000230000-0x0000000000231000-memory.dmp
        Filesize

        4KB

      • memory/1784-69-0x0000000000000000-mapping.dmp
      • memory/1784-82-0x00000000022E0000-0x00000000022E1000-memory.dmp
        Filesize

        4KB