Analysis

  • max time kernel
    138s
  • max time network
    152s
  • platform
    windows7_x64
  • resource
    win7v20210410
  • submitted
    16-04-2021 06:39

General

  • Target

    qbsubf8fng_AGOSTO_DOC21408001.doc

  • Size

    1.4MB

  • MD5

    53a47a7554872f55e5d4cf09d9598b20

  • SHA1

    6d8d37d0cdbfb96d79eb69e05766ee40393fcd63

  • SHA256

    27ce70fee0c8e0e90e20dfd2f1e2db5d5a13b8857be1dfd2142f04ab77bc6510

  • SHA512

    f8764308302ec4088ba5c2f6ea8efc06de66e771932d42a22b449fcfb32b3afc5fdf98a7417291cbef36cfcdbbf494b3983faa03bef43c3bb9c16a1bfb796f19

Malware Config

Signatures

  • DcRat

    DarkCrystal(DC) is a new .NET RAT active since June 2019 capable of loading additional plugins.

  • DiamondFox

    DiamondFox is a multipurpose botnet with many capabilities.

  • DiamondFox payload 3 IoCs

    Detects DiamondFox payload in file/memory.

  • NirSoft WebBrowserPassView 3 IoCs

    Password recovery tool for various web browsers

  • Nirsoft 3 IoCs
  • Blocklisted process makes network request 2 IoCs
  • Executes dropped EXE 3 IoCs
  • Drops startup file 2 IoCs
  • Loads dropped DLL 1 IoCs
  • Reads user/profile data of web browsers 2 TTPs

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

  • Checks installed software on the system 1 TTPs

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

  • Suspicious use of SetThreadContext 2 IoCs
  • Drops file in Windows directory 1 IoCs
  • Office loads VBA resources, possible macro or embedded object present
  • Launches Equation Editor 1 TTPs 1 IoCs

    Equation Editor is an old Office component often targeted by exploits such as CVE-2017-11882.

  • Modifies Internet Explorer settings 1 TTPs 9 IoCs
  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 53 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 56 IoCs

Processes

  • C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE
    "C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE" /n "C:\Users\Admin\AppData\Local\Temp\qbsubf8fng_AGOSTO_DOC21408001.doc"
    1⤵
    • Drops file in Windows directory
    • Modifies Internet Explorer settings
    • Suspicious behavior: AddClipboardFormatListener
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:484
    • C:\Windows\splwow64.exe
      C:\Windows\splwow64.exe 12288
      2⤵
        PID:1996
    • C:\Program Files (x86)\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE
      "C:\Program Files (x86)\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE" -Embedding
      1⤵
      • Blocklisted process makes network request
      • Loads dropped DLL
      • Launches Equation Editor
      • Suspicious use of WriteProcessMemory
      PID:1724
      • C:\Users\Public\69577.exe
        "C:\Users\Public\69577.exe"
        2⤵
        • Executes dropped EXE
        • Drops startup file
        • Suspicious use of SetThreadContext
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:992
        • C:\Users\Public\69577.exe
          "C:\Users\Public\69577.exe"
          3⤵
          • Executes dropped EXE
          • Suspicious use of SetThreadContext
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of WriteProcessMemory
          PID:1336
          • C:\Windows\SysWOW64\Wbem\wmic.exe
            "wmic" /Node:localhost /Namespace:\\root\SecurityCenter2 path AntiVirusProduct get DisplayName /FORMAT:List
            4⤵
            • Suspicious use of AdjustPrivilegeToken
            PID:292
          • C:\Windows\SysWOW64\Wbem\wmic.exe
            "wmic" os get caption /FORMAT:List
            4⤵
            • Suspicious use of AdjustPrivilegeToken
            PID:928
          • C:\Windows\SysWOW64\Wbem\wmic.exe
            "wmic" path win32_VideoController get caption /FORMAT:List
            4⤵
              PID:1760
            • C:\Windows\SysWOW64\Wbem\wmic.exe
              "wmic" path win32_NetworkAdapterConfiguration where IPEnabled=1 get IPAddress /FORMAT:List
              4⤵
                PID:1676
              • C:\Windows\SysWOW64\Wbem\wmic.exe
                "wmic" LogicalDisk Where DriveType=4 get VolumeName /FORMAT:List
                4⤵
                  PID:112
                • C:\Windows\SysWOW64\Wbem\wmic.exe
                  "wmic" path win32_PingStatus where address='vladisfoxlink.ru' get StatusCode /FORMAT:List
                  4⤵
                    PID:1476
                  • C:\Windows\SysWOW64\Wbem\wmic.exe
                    "wmic" path win32_PingStatus where address='vladisfoxlink.ru' get ResponseTime /FORMAT:List
                    4⤵
                      PID:1608
                    • C:\Users\Public\69577.exe
                      /scomma "C:\Users\Public\1.log"
                      4⤵
                      • Executes dropped EXE
                      • Suspicious behavior: EnumeratesProcesses
                      PID:1696

              Network

              MITRE ATT&CK Matrix ATT&CK v6

              Execution

              Exploitation for Client Execution

              1
              T1203

              Defense Evasion

              Modify Registry

              1
              T1112

              Credential Access

              Credentials in Files

              1
              T1081

              Discovery

              Query Registry

              1
              T1012

              Collection

              Data from Local System

              1
              T1005

              Replay Monitor

              Loading Replay Monitor...

              Downloads

              • C:\Users\Public\1.log
                MD5

                4f7d90f045ae07792fb8d76bce925854

                SHA1

                c39b2866368f2c88c1865aa5577792bd2fb8bfe5

                SHA256

                df74b997137fec63589828cafa9df9bfe272b330ffb8743fa4db79096a0fdc34

                SHA512

                4ce48987acf465b7064d0162449eaf929b1e80dc760fe2da72e2841754a34536be5b2c17ade17d58e76c31bc9fdd6540820191395b9399287aabf4007274ae71

              • C:\Users\Public\69577.exe
                MD5

                1f130569a8373dfae4f387d4757769cf

                SHA1

                038f27c37ade7fcb97745e149b65258a7a1ea295

                SHA256

                ed5872028e073a00549aa0ffe151dc4d641eae83694c1fcc3dc545183c091d97

                SHA512

                7401da486a4141efe362f3ba80299f3305e05866e7a04cad8a40107fe6a83765e4616af4ef6f6f40b605135cd34a3c48dedc6023ee32facfb8b4984f29cfa7b3

              • C:\Users\Public\69577.exe
                MD5

                1f130569a8373dfae4f387d4757769cf

                SHA1

                038f27c37ade7fcb97745e149b65258a7a1ea295

                SHA256

                ed5872028e073a00549aa0ffe151dc4d641eae83694c1fcc3dc545183c091d97

                SHA512

                7401da486a4141efe362f3ba80299f3305e05866e7a04cad8a40107fe6a83765e4616af4ef6f6f40b605135cd34a3c48dedc6023ee32facfb8b4984f29cfa7b3

              • C:\Users\Public\69577.exe
                MD5

                1f130569a8373dfae4f387d4757769cf

                SHA1

                038f27c37ade7fcb97745e149b65258a7a1ea295

                SHA256

                ed5872028e073a00549aa0ffe151dc4d641eae83694c1fcc3dc545183c091d97

                SHA512

                7401da486a4141efe362f3ba80299f3305e05866e7a04cad8a40107fe6a83765e4616af4ef6f6f40b605135cd34a3c48dedc6023ee32facfb8b4984f29cfa7b3

              • C:\Users\Public\69577.exe
                MD5

                1f130569a8373dfae4f387d4757769cf

                SHA1

                038f27c37ade7fcb97745e149b65258a7a1ea295

                SHA256

                ed5872028e073a00549aa0ffe151dc4d641eae83694c1fcc3dc545183c091d97

                SHA512

                7401da486a4141efe362f3ba80299f3305e05866e7a04cad8a40107fe6a83765e4616af4ef6f6f40b605135cd34a3c48dedc6023ee32facfb8b4984f29cfa7b3

              • \Users\Public\69577.exe
                MD5

                1f130569a8373dfae4f387d4757769cf

                SHA1

                038f27c37ade7fcb97745e149b65258a7a1ea295

                SHA256

                ed5872028e073a00549aa0ffe151dc4d641eae83694c1fcc3dc545183c091d97

                SHA512

                7401da486a4141efe362f3ba80299f3305e05866e7a04cad8a40107fe6a83765e4616af4ef6f6f40b605135cd34a3c48dedc6023ee32facfb8b4984f29cfa7b3

              • memory/112-83-0x0000000000000000-mapping.dmp
              • memory/292-78-0x0000000000000000-mapping.dmp
              • memory/484-93-0x000000005FFF0000-0x0000000060000000-memory.dmp
                Filesize

                64KB

              • memory/484-60-0x0000000070701000-0x0000000070703000-memory.dmp
                Filesize

                8KB

              • memory/484-61-0x000000005FFF0000-0x0000000060000000-memory.dmp
                Filesize

                64KB

              • memory/484-59-0x0000000072C81000-0x0000000072C84000-memory.dmp
                Filesize

                12KB

              • memory/928-80-0x0000000000000000-mapping.dmp
              • memory/992-66-0x0000000000000000-mapping.dmp
              • memory/992-72-0x0000000004BE0000-0x0000000004BE1000-memory.dmp
                Filesize

                4KB

              • memory/992-69-0x0000000001340000-0x0000000001341000-memory.dmp
                Filesize

                4KB

              • memory/992-73-0x0000000000280000-0x0000000000281000-memory.dmp
                Filesize

                4KB

              • memory/992-71-0x00000000004F0000-0x000000000052F000-memory.dmp
                Filesize

                252KB

              • memory/992-85-0x0000000004BE5000-0x0000000004BF6000-memory.dmp
                Filesize

                68KB

              • memory/1336-75-0x0000000000401000-mapping.dmp
              • memory/1336-79-0x0000000000400000-0x0000000000435000-memory.dmp
                Filesize

                212KB

              • memory/1336-74-0x0000000000400000-0x0000000000435000-memory.dmp
                Filesize

                212KB

              • memory/1476-84-0x0000000000000000-mapping.dmp
              • memory/1608-86-0x0000000000000000-mapping.dmp
              • memory/1676-82-0x0000000000000000-mapping.dmp
              • memory/1696-87-0x0000000000400000-0x000000000047C000-memory.dmp
                Filesize

                496KB

              • memory/1696-88-0x00000000004466F4-mapping.dmp
              • memory/1696-91-0x0000000000400000-0x000000000047C000-memory.dmp
                Filesize

                496KB

              • memory/1724-64-0x0000000075EF1000-0x0000000075EF3000-memory.dmp
                Filesize

                8KB

              • memory/1760-81-0x0000000000000000-mapping.dmp
              • memory/1996-63-0x000007FEFC181000-0x000007FEFC183000-memory.dmp
                Filesize

                8KB

              • memory/1996-62-0x0000000000000000-mapping.dmp