bumblebee | 37104c67794383d81a4bacb301c4e3b4e04d12bcb914494fb8f7c5a2e0ff9994

General

Target

toso3l/toso3l.dll
Size

1.7MB
MD5

e4cd57d7cca00316c3654ce36b4d6418
SHA1

4384cc2613d9edba5052ca97c34509ef7a5424e1
SHA256

48c9b5335b17f314acef74aec578e9d9770779179903175f1b18a7b7d953841c
SHA512

c5b6a93e76ee82d6433e201205620e90e6f982daf95500f957d0820a4bdb7414fd166acf11a44c4f73e3f83d120bbd9f03281c391605ce9a4beaf88ac6fe171d

Score

10^/10

bumblebee 1406r evasion trojan

Malware Config

Extracted

Family

bumblebee

Botnet

1406r

C2

39.57.152.217:440

69.161.201.181:382

244.6.154.71:111

193.233.203.156:443

221.106.84.123:307

194.135.33.148:443

111.99.39.11:387

223.243.46.133:147

48.165.175.199:316

78.89.31.86:229

157.17.142.85:406

90.81.8.16:370

21.29.238.98:209

154.56.0.252:443

103.175.16.108:443

188.57.4.52:357

15.209.19.148:466

160.70.24.228:486

33.145.184.132:240

235.126.132.170:106

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\FADT\VBOX__	rundll32.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\RSDT\VBOX__	rundll32.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\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\SystemBiosVersion	rundll32.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	rundll32.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosDate	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-1-5-21-1819626980-2277161760-1023733287-1000\SOFTWARE\Wine	rundll32.exe

Suspicious behavior: EnumeratesProcesses 41 IoCs

pid	Process
1800	rundll32.exe
1800	rundll32.exe
1800	rundll32.exe
1800	rundll32.exe
1800	rundll32.exe
1800	rundll32.exe
1800	rundll32.exe
1800	rundll32.exe
1800	rundll32.exe
1800	rundll32.exe
1800	rundll32.exe
1800	rundll32.exe
1800	rundll32.exe
1800	rundll32.exe
1800	rundll32.exe
1800	rundll32.exe
1800	rundll32.exe
1800	rundll32.exe
1800	rundll32.exe
1800	rundll32.exe
1800	rundll32.exe
1800	rundll32.exe
1800	rundll32.exe
1800	rundll32.exe
1800	rundll32.exe
1800	rundll32.exe
1800	rundll32.exe
1800	rundll32.exe
1800	rundll32.exe
1800	rundll32.exe
1800	rundll32.exe
1800	rundll32.exe
1800	rundll32.exe
1800	rundll32.exe
1800	rundll32.exe
1800	rundll32.exe
1800	rundll32.exe
1800	rundll32.exe
1800	rundll32.exe
1800	rundll32.exe
1800	rundll32.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\toso3l\toso3l.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:1800