Analysis

  • max time kernel
    141s
  • max time network
    143s
  • platform
    windows7_x64
  • resource
    win7v20201028
  • submitted
    21-01-2021 11:34

General

  • Target

    1 Total New Invoices-Thursday January 21 2021.xlsm

  • Size

    30KB

  • MD5

    d89d70ee6809ef93910bfbf10c4caf94

  • SHA1

    5e8d4db8464fd6d427d5987ae6cb017ceac13839

  • SHA256

    55cbb43aad59d149ba4bc06684771b5d87a3f570da165437c4d07d442d4b8db7

  • SHA512

    c5eb5a46edb4cf9a7eeeb7e945665f9091d2b536310d5e4de54d47fca8690821c28c004a4677daae1273911f8e60d467cd8424f2e7e23e12f20ac589bb6d5073

Malware Config

Extracted

Language
xlm4.0
Source

Extracted

Family

dridex

Botnet

10444

C2

194.225.58.214:443

211.110.44.63:5353

69.164.207.140:3388

198.57.200.100:3786

rc4.plain
rc4.plain

Signatures

  • Dridex

    Dridex(known as Bugat/Cridex) is a form of malware that specializes in stealing bank credentials.

  • Process spawned unexpected child process 2 IoCs

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

  • Dridex Loader 2 IoCs

    Detects Dridex both x86 and x64 loader in memory.

  • Loads dropped DLL 1 IoCs
  • Office loads VBA resources, possible macro or embedded object present
  • Enumerates system info in registry 2 TTPs 1 IoCs
  • Modifies Internet Explorer settings 1 TTPs 9 IoCs
  • Modifies registry class 280 IoCs
  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious use of SetWindowsHookEx 3 IoCs
  • Suspicious use of WriteProcessMemory 14 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\1 Total New Invoices-Thursday January 21 2021.xlsm"
    1⤵
    • Enumerates system info in registry
    • Modifies Internet Explorer settings
    • Modifies registry class
    • Suspicious behavior: AddClipboardFormatListener
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:2028
    • C:\Windows\SysWOW64\regsvr32.exe
      "C:\Windows\System32\regsvr32.exe" -s C:\Users\Admin\AppData\Local\Temp\bksuh.dll
      2⤵
      • Process spawned unexpected child process
      PID:2040
    • C:\Windows\SysWOW64\regsvr32.exe
      "C:\Windows\System32\regsvr32.exe" -s C:\Users\Admin\AppData\Local\Temp\bksuh.dll
      2⤵
      • Process spawned unexpected child process
      • Loads dropped DLL
      PID:1532

Network

MITRE ATT&CK Matrix ATT&CK v6

Defense Evasion

Modify Registry

1
T1112

Discovery

Query Registry

1
T1012

System Information Discovery

1
T1082

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Temp\bksuh.dll
    MD5

    a01d5a105e5f7f87d6219289021d6fcd

    SHA1

    2ca71d7ba72b5ad78f7497c94e898bfc66f1788d

    SHA256

    b1db3e9ff85ecb2f697ac7c77e2e1e3617320ff9c16567dce4f5ddc9610d3a8c

    SHA512

    8f77d4b6a083b99ea50bae16fbd7d53cf619199e07b1b9488ce26379615d7a1fbf6a4e0b4b05600d4a1ee4338b5ccb8d5e128dd166440a606ffa3ff4dc129da5

  • \Users\Admin\AppData\Local\Temp\bksuh.dll
    MD5

    a01d5a105e5f7f87d6219289021d6fcd

    SHA1

    2ca71d7ba72b5ad78f7497c94e898bfc66f1788d

    SHA256

    b1db3e9ff85ecb2f697ac7c77e2e1e3617320ff9c16567dce4f5ddc9610d3a8c

    SHA512

    8f77d4b6a083b99ea50bae16fbd7d53cf619199e07b1b9488ce26379615d7a1fbf6a4e0b4b05600d4a1ee4338b5ccb8d5e128dd166440a606ffa3ff4dc129da5

  • memory/1532-8-0x0000000000000000-mapping.dmp
  • memory/1532-12-0x000000006C9E0000-0x000000006CA1D000-memory.dmp
    Filesize

    244KB

  • memory/1532-13-0x000000006C9E0000-0x000000006CA1D000-memory.dmp
    Filesize

    244KB

  • memory/1532-14-0x0000000000320000-0x0000000000321000-memory.dmp
    Filesize

    4KB

  • memory/1720-7-0x000007FEF6AD0000-0x000007FEF6D4A000-memory.dmp
    Filesize

    2.5MB

  • memory/2028-2-0x000000002FA41000-0x000000002FA44000-memory.dmp
    Filesize

    12KB

  • memory/2028-3-0x0000000071D11000-0x0000000071D13000-memory.dmp
    Filesize

    8KB

  • memory/2028-4-0x000000005FFF0000-0x0000000060000000-memory.dmp
    Filesize

    64KB

  • memory/2040-5-0x0000000000000000-mapping.dmp
  • memory/2040-6-0x0000000075C31000-0x0000000075C33000-memory.dmp
    Filesize

    8KB