Analysis

  • max time kernel
    51s
  • max time network
    59s
  • platform
    windows7_x64
  • resource
    win7v20201028
  • submitted
    06-03-2021 13:54

General

  • Target

    20c5c02873f69ec0ad6b8c1470d90a3f3a350ebb1de0cd957e820663eff20baf.dll

  • Size

    168KB

  • MD5

    3f0cf83ea4ecd9c97eb4b605d586bd7c

  • SHA1

    b233ca947f52d7795502d7e7d32760827cca4dd9

  • SHA256

    20c5c02873f69ec0ad6b8c1470d90a3f3a350ebb1de0cd957e820663eff20baf

  • SHA512

    a961482a1fa96db7110724401ee6394a56d7ffdc015627337792fb193f09aeb6978fe2964e6e5dce3e62f15d0c957f8253742e809062e4aec7c104e8e7251105

Malware Config

Extracted

Family

dridex

Botnet

111

C2

173.203.78.138:443

217.160.107.189:6601

77.220.64.150:5037

rc4.plain
rc4.plain

Signatures

  • Dridex

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

  • Dridex Loader 2 IoCs

    Detects Dridex both x86 and x64 loader in memory.

  • Blocklisted process makes network request 2 IoCs
  • Checks installed software on the system 1 TTPs

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

  • Checks whether UAC is enabled 1 TTPs 1 IoCs
  • Suspicious use of WriteProcessMemory 7 IoCs

Processes

  • C:\Windows\system32\rundll32.exe
    rundll32.exe C:\Users\Admin\AppData\Local\Temp\20c5c02873f69ec0ad6b8c1470d90a3f3a350ebb1de0cd957e820663eff20baf.dll,#1
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1656
    • C:\Windows\SysWOW64\rundll32.exe
      rundll32.exe C:\Users\Admin\AppData\Local\Temp\20c5c02873f69ec0ad6b8c1470d90a3f3a350ebb1de0cd957e820663eff20baf.dll,#1
      2⤵
      • Blocklisted process makes network request
      • Checks whether UAC is enabled
      PID:1960

Network

MITRE ATT&CK Matrix ATT&CK v6

Discovery

Query Registry

1
T1012

System Information Discovery

1
T1082

Replay Monitor

Loading Replay Monitor...

Downloads

  • memory/1528-7-0x000007FEF7BD0000-0x000007FEF7E4A000-memory.dmp
    Filesize

    2.5MB

  • memory/1960-2-0x0000000000000000-mapping.dmp
  • memory/1960-3-0x00000000765A1000-0x00000000765A3000-memory.dmp
    Filesize

    8KB

  • memory/1960-4-0x0000000075320000-0x000000007534C000-memory.dmp
    Filesize

    176KB

  • memory/1960-5-0x00000000001E0000-0x00000000001E6000-memory.dmp
    Filesize

    24KB

  • memory/1960-6-0x0000000075320000-0x000000007533F000-memory.dmp
    Filesize

    124KB