bumblebee | 5cf736ccf0952dc2b6b1cac95841947e5436b690d2f2949f17d5100e8d2e40ab

General

Target

rec.dll
Size

2.0MB
MD5

1f1d96a3f69ce08560740e0595dc0f70
SHA1

2cb4edd8a1c820413ee6e9a811db8d76bacdfe55
SHA256

d9dc399f5583db5e3bfe1998d9296695975dbd2217f7ada8e28a4d605896c8a7
SHA512

2eaa82853ee6386e920f5c86e388e854ca736dc21d0306b52897f7ef1f1c434f306fbb277f9180330409fd0ca794c058e20bedff4bfbc84660a6ca686d21f58c

Score

10^/10

bumblebee 146a evasion trojan

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++.
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\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
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\VBoxGuest	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\RSDT\VBOX__	rundll32.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	rundll32.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\FADT\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
1668	rundll32.exe
1668	rundll32.exe
1668	rundll32.exe
1668	rundll32.exe
1668	rundll32.exe
1668	rundll32.exe
1668	rundll32.exe
1668	rundll32.exe
1668	rundll32.exe
1668	rundll32.exe
1668	rundll32.exe
1668	rundll32.exe
1668	rundll32.exe
1668	rundll32.exe
1668	rundll32.exe
1668	rundll32.exe
1668	rundll32.exe
1668	rundll32.exe
1668	rundll32.exe
1668	rundll32.exe
1668	rundll32.exe
1668	rundll32.exe
1668	rundll32.exe
1668	rundll32.exe
1668	rundll32.exe
1668	rundll32.exe
1668	rundll32.exe
1668	rundll32.exe
1668	rundll32.exe
1668	rundll32.exe
1668	rundll32.exe
1668	rundll32.exe
1668	rundll32.exe
1668	rundll32.exe
1668	rundll32.exe
1668	rundll32.exe
1668	rundll32.exe
1668	rundll32.exe
1668	rundll32.exe
1668	rundll32.exe
1668	rundll32.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\rec.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:1668