Analysis

  • max time kernel
    157s
  • max time network
    148s
  • platform
    windows10_x64
  • resource
    win10-en-20211104
  • submitted
    04-12-2021 03:08

General

  • Target

    f26a443ac89f9b418959ed6f59163358f57a469af9a4509ca82bfec3e6d092b0.xlsm

  • Size

    37KB

  • MD5

    b85066e6d286499120d91f942f43d371

  • SHA1

    1cfc720d33149fb6e1600144c701b057edc7c38c

  • SHA256

    f26a443ac89f9b418959ed6f59163358f57a469af9a4509ca82bfec3e6d092b0

  • SHA512

    9c676cc214ebfb50326858fc91ebae9811a4b2d3924f742d87eb0274766bdc8c1e4e8d394d3cdea7e6fcdaab2ce0c61d0a8f040c3026541a319755f2bc777f61

Malware Config

Extracted

Language
xlm4.0
Source
URLs
xlm40.dropper

http://inorte.com.br/awkl2/NFkGvrZkoh7TdwolFM/

Extracted

Family

emotet

Botnet

Epoch4

C2

172.104.227.98:443

31.207.89.74:8080

46.55.222.11:443

41.76.108.46:8080

103.8.26.103:8080

185.184.25.237:8080

103.8.26.102:8080

203.114.109.124:443

45.118.115.99:8080

178.79.147.66:8080

58.227.42.236:80

45.118.135.203:7080

103.75.201.2:443

195.154.133.20:443

192.254.71.210:443

45.142.114.231:8080

212.237.5.209:443

207.38.84.195:8080

104.251.214.46:8080

212.237.17.99:8080

eck1.plain
ecs1.plain

Signatures

  • Emotet

    Emotet is a trojan that is primarily spread through spam emails.

  • Process spawned unexpected child process 1 IoCs

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

  • Blocklisted process makes network request 1 IoCs
  • Downloads MZ/PE file
  • Loads dropped DLL 2 IoCs
  • Drops file in System32 directory 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Checks processor information in registry 2 TTPs 3 IoCs

    Processor information is often read in order to detect sandboxing environments.

  • Enumerates system info in registry 2 TTPs 3 IoCs
  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of SetWindowsHookEx 12 IoCs
  • Suspicious use of WriteProcessMemory 12 IoCs

Processes

  • C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE
    "C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE" "C:\Users\Admin\AppData\Local\Temp\f26a443ac89f9b418959ed6f59163358f57a469af9a4509ca82bfec3e6d092b0.xlsm"
    1⤵
    • Checks processor information in registry
    • Enumerates system info in registry
    • Suspicious behavior: AddClipboardFormatListener
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:3992
    • C:\Windows\SysWOW64\rundll32.exe
      C:\Windows\SysWOW64\rundll32.exe ..\bestb.ocx,D"&"l"&"l"&"R"&"eg"&"i"&"s"&"t"&"erServer
      2⤵
      • Process spawned unexpected child process
      • Loads dropped DLL
      • Suspicious use of WriteProcessMemory
      PID:1592
      • C:\Windows\SysWOW64\rundll32.exe
        C:\Windows\SysWOW64\rundll32.exe "C:\Users\Admin\bestb.ocx",DllRegisterServer
        3⤵
        • Loads dropped DLL
        • Drops file in System32 directory
        • Suspicious use of WriteProcessMemory
        PID:5028
        • C:\Windows\SysWOW64\rundll32.exe
          C:\Windows\SysWOW64\rundll32.exe "C:\Windows\SysWOW64\Mlmeykththemvtt\sdgddnexo.vvj",CQvKg
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:4948
          • C:\Windows\SysWOW64\rundll32.exe
            C:\Windows\SysWOW64\rundll32.exe "C:\Windows\System32\Mlmeykththemvtt\sdgddnexo.vvj",DllRegisterServer
            5⤵
            • Blocklisted process makes network request
            • Suspicious behavior: EnumeratesProcesses
            PID:2812

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • C:\Users\Admin\bestb.ocx

    MD5

    2f93cb3701205b257b8ef5e76545923b

    SHA1

    c53d45e900d52a0a4802f858ac94a10bdbff3d15

    SHA256

    16211b428f9d5da08b3a0d77589bf217f34558388d52d294f7d37dfe5e44b2e0

    SHA512

    2c095cce1927a872f66457b18d4f8d71cb62af05dbfd8fef930959f9cebeada93557acf11218b5d9798f59f4de565cec7b86c03410d7bf68249ccd5f86625095

  • \Users\Admin\bestb.ocx

    MD5

    2f93cb3701205b257b8ef5e76545923b

    SHA1

    c53d45e900d52a0a4802f858ac94a10bdbff3d15

    SHA256

    16211b428f9d5da08b3a0d77589bf217f34558388d52d294f7d37dfe5e44b2e0

    SHA512

    2c095cce1927a872f66457b18d4f8d71cb62af05dbfd8fef930959f9cebeada93557acf11218b5d9798f59f4de565cec7b86c03410d7bf68249ccd5f86625095

  • \Users\Admin\bestb.ocx

    MD5

    2f93cb3701205b257b8ef5e76545923b

    SHA1

    c53d45e900d52a0a4802f858ac94a10bdbff3d15

    SHA256

    16211b428f9d5da08b3a0d77589bf217f34558388d52d294f7d37dfe5e44b2e0

    SHA512

    2c095cce1927a872f66457b18d4f8d71cb62af05dbfd8fef930959f9cebeada93557acf11218b5d9798f59f4de565cec7b86c03410d7bf68249ccd5f86625095

  • memory/1592-269-0x0000000000000000-mapping.dmp

  • memory/1592-274-0x0000000010000000-0x0000000010027000-memory.dmp

    Filesize

    156KB

  • memory/2812-277-0x0000000000000000-mapping.dmp

  • memory/3992-122-0x0000020935970000-0x0000020935972000-memory.dmp

    Filesize

    8KB

  • memory/3992-123-0x0000020935970000-0x0000020935972000-memory.dmp

    Filesize

    8KB

  • memory/3992-124-0x00007FF9CB1D0000-0x00007FF9CB1E0000-memory.dmp

    Filesize

    64KB

  • memory/3992-125-0x0000020935970000-0x0000020935972000-memory.dmp

    Filesize

    8KB

  • memory/3992-118-0x00007FF9CB1D0000-0x00007FF9CB1E0000-memory.dmp

    Filesize

    64KB

  • memory/3992-121-0x00007FF9CB1D0000-0x00007FF9CB1E0000-memory.dmp

    Filesize

    64KB

  • memory/3992-120-0x00007FF9CB1D0000-0x00007FF9CB1E0000-memory.dmp

    Filesize

    64KB

  • memory/3992-119-0x00007FF9CB1D0000-0x00007FF9CB1E0000-memory.dmp

    Filesize

    64KB

  • memory/4948-276-0x0000000000000000-mapping.dmp

  • memory/5028-272-0x0000000000000000-mapping.dmp