Analysis

  • max time kernel
    92s
  • max time network
    149s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220414-en
  • submitted
    27/06/2022, 18:17

General

  • Target

    file.dll

  • Size

    1.3MB

  • MD5

    2dcdc650159b4147ab3eba65800cf553

  • SHA1

    53658de68b22b1ca5707ab99e9178b75a7320427

  • SHA256

    921f3bfa1f2c1397a749a336c9fb77243932d20eac2a0812348727e5ac83aefa

  • SHA512

    cc30d88a7fc26333d71dbd53fb1e7c54de3069efdaa67947c103030b60c1d13716c37cfde48eb7fae2dc556efb5b29de1e37fc23585055e14940380bf1c9008b

Malware Config

Extracted

Family

bumblebee

Botnet

246a

C2

231.215.229.228:485

69.52.231.230:347

239.99.55.244:383

128.197.89.141:438

100.75.172.149:488

23.82.141.11:443

107.77.228.163:260

88.232.241.45:176

51.83.253.131:443

80.194.203.32:143

18.248.93.197:110

200.194.145.202:359

154.56.0.111:443

154.207.124.132:129

174.104.34.167:296

84.224.237.39:382

195.250.7.94:370

237.251.89.198:174

81.39.2.175:407

139.203.193.38:443

rc4.plain

Signatures

  • BumbleBee

    BumbleBee is a webshell malware written in C++.

  • Enumerates VirtualBox registry keys 2 TTPs 5 IoCs
  • Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs 3 IoCs
  • Looks for VirtualBox Guest Additions in registry 2 TTPs 1 IoCs
  • Checks BIOS information in registry 2 TTPs 3 IoCs

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

  • Identifies Wine through registry keys 2 TTPs 1 IoCs

    Wine is a compatibility layer capable of running Windows applications, which can be used as sandboxing environment.

  • Suspicious behavior: EnumeratesProcesses 64 IoCs

Processes

  • C:\Windows\system32\regsvr32.exe
    regsvr32 /s C:\Users\Admin\AppData\Local\Temp\file.dll
    1⤵
    • Enumerates VirtualBox registry keys
    • Identifies VirtualBox via ACPI registry values (likely anti-VM)
    • Looks for VirtualBox Guest Additions in registry
    • Checks BIOS information in registry
    • Identifies Wine through registry keys
    • Suspicious behavior: EnumeratesProcesses
    PID:3880

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads

  • memory/3880-130-0x0000000002B10000-0x0000000002C26000-memory.dmp

    Filesize

    1.1MB

  • memory/3880-131-0x0000000002B10000-0x0000000002C26000-memory.dmp

    Filesize

    1.1MB

  • memory/3880-132-0x0000000002B10000-0x0000000002C26000-memory.dmp

    Filesize

    1.1MB

  • memory/3880-133-0x00007FFD01B00000-0x00007FFD01B10000-memory.dmp

    Filesize

    64KB