bumblebee | cee0f9f532ba26beaf22ca8895d0904f1d763dc15daca6e8ed44105f863718be

General

Target

pop3ram.dll
Size

1.2MB
MD5

5ad508a693799dc062d05bd74c92dca2
SHA1

f753f49d262a838cb7e39f31c92f7ab65941761d
SHA256

cee0f9f532ba26beaf22ca8895d0904f1d763dc15daca6e8ed44105f863718be
SHA512

94ddd6564e34f12a4fbbeae1e6bb9437678f8518942692ddd27d38d09cc7f2e7d7208038fa459dc0146f9d08a719b116aef90b378d9d50ac20e3c1adbda021f9

Score

10^/10

bumblebee 1306r evasion trojan

Malware Config

Extracted

Family

bumblebee

Botnet

1306r

C2

185.62.57.182:443

185.250.148.136:443

158.69.98.105:443

193.233.203.156:443

145.239.135.155:443

146.70.125.82:443

146.70.104.250:443

103.175.16.108:443

185.62.58.133:443

194.135.33.148:443

194.135.33.149:443

154.56.0.241:443

23.254.201.97:443

45.147.229.101:443

185.62.58.169:443

192.236.249.68:443

193.239.84.254:443

37.120.198.248:443

146.19.173.139:443

rc4.plain

Signatures

BumbleBee
BumbleBee is a webshell malware written in C++.
trojan bumblebee

Enumerates VirtualBox registry keys 2 TTPs 5 IoCs

evasion

Query Registry

T1012

Virtualization/Sandbox Evasion

T1497

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\VBoxGuest	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\VBoxMouse	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\VBoxService	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\VBoxSF	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\VBoxVideo	rundll32.exe

Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs 3 IoCs

evasion

Query Registry

T1012

Virtualization/Sandbox Evasion

T1497

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	rundll32.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\FADT\VBOX__	rundll32.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\RSDT\VBOX__	rundll32.exe

Looks for VirtualBox Guest Additions in registry 2 TTPs 1 IoCs

evasion

Query Registry

T1012

Virtualization/Sandbox Evasion

T1497

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SOFTWARE\Oracle\VirtualBox Guest Additions	rundll32.exe

Checks BIOS information in registry 2 TTPs 3 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosDate	rundll32.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	rundll32.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	rundll32.exe

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.

evasion

Query Registry

T1012

Virtualization/Sandbox Evasion

T1497

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\SOFTWARE\Wine	rundll32.exe

Suspicious behavior: EnumeratesProcesses 41 IoCs

pid	Process
284	rundll32.exe
284	rundll32.exe
284	rundll32.exe
284	rundll32.exe
284	rundll32.exe
284	rundll32.exe
284	rundll32.exe
284	rundll32.exe
284	rundll32.exe
284	rundll32.exe
284	rundll32.exe
284	rundll32.exe
284	rundll32.exe
284	rundll32.exe
284	rundll32.exe
284	rundll32.exe
284	rundll32.exe
284	rundll32.exe
284	rundll32.exe
284	rundll32.exe
284	rundll32.exe
284	rundll32.exe
284	rundll32.exe
284	rundll32.exe
284	rundll32.exe
284	rundll32.exe
284	rundll32.exe
284	rundll32.exe
284	rundll32.exe
284	rundll32.exe
284	rundll32.exe
284	rundll32.exe
284	rundll32.exe
284	rundll32.exe
284	rundll32.exe
284	rundll32.exe
284	rundll32.exe
284	rundll32.exe
284	rundll32.exe
284	rundll32.exe
284	rundll32.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\pop3ram.dll,#1
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:284