Analysis

  • max time kernel
    91s
  • max time network
    125s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220414-en
  • submitted
    15/06/2022, 05:39

General

  • Target

    rec/replay.lnk

  • Size

    1KB

  • MD5

    4e543f7a1f8d9c3014623983c74c570f

  • SHA1

    9d71a451a20f5c14fa97ce12f38e64e11576361b

  • SHA256

    c0987d05cb86664e27d0f3cb7ed5142f38935e8ce7754cbe5e4525fdca480cdd

  • SHA512

    c539f4694b59567c33754d92e74e7f56968abe5325efc12aba308f53fd19ea4901164326a003735335418f4ae9539fe9e03e1e54b72827dc9f38dfe463faa58d

Malware Config

Extracted

Family

bumblebee

Botnet

146a

C2

12.236.242.155:211

243.92.11.201:387

182.10.38.85:198

117.75.94.181:456

148.70.67.206:267

247.23.37.74:155

122.247.231.47:117

45.142.214.167:443

171.227.174.67:108

204.1.81.223:110

145.239.28.110:443

170.24.243.46:441

69.235.89.243:366

4.165.175.212:387

76.96.116.176:190

128.44.54.202:493

103.175.16.106:443

40.72.17.141:326

146.19.173.186:443

51.68.145.54:443

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.

  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • 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.

  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of WriteProcessMemory 2 IoCs

Processes

  • C:\Windows\system32\cmd.exe
    cmd /c C:\Users\Admin\AppData\Local\Temp\rec\replay.lnk
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4288
    • C:\Windows\System32\rundll32.exe
      "C:\Windows\System32\rundll32.exe" replay.dll,ScdHrYnuuU
      2⤵
      • 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:3392

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads

  • memory/3392-131-0x0000022225BE0000-0x0000022225CF7000-memory.dmp

    Filesize

    1.1MB

  • memory/3392-132-0x00007FFC6A400000-0x00007FFC6A410000-memory.dmp

    Filesize

    64KB