bumblebee | 8427fe989bc9b71a07d2a26a80e9f88fb2f2a7cb068fff5a7998e6a4628432bc

General

Target

loader.bat
Size

55B
MD5

7570714d0f7f867da3c26839c45842fd
SHA1

4d72ffc8ad5aa71c100f732da6eebd5d6e237414
SHA256

b3cb8e9bd42228a54aebd27f2f1435cb2643f698ab805aac64b691f0c0cdf5a6
SHA512

24396fa0e43cd8d5efa1c555905aae9ef1d7041d5aaf00e255d71ebbfc7dcaa72172c455148a2cefecfc52c1978ef782ce011473f4d837ae7a30f2c95880a613

Score

10^/10

bumblebee 276r evasion trojan

Malware Config

Extracted

Family

bumblebee

Botnet

276r

C2

76.81.225.65:337

41.28.188.77:212

51.199.209.83:290

192.119.77.100:443

68.121.248.35:464

54.37.131.14:443

149.197.87.217:409

224.110.0.53:105

253.13.70.127:340

122.50.173.112:157

103.25.51.23:388

199.61.79.119:346

68.14.88.177:143

227.12.148.222:270

33.93.97.183:112

168.113.169.88:428

64.157.160.42:207

156.151.142.100:123

146.19.253.56:443

135.36.57.27:157

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\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
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\VBoxMouse	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\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
912	rundll32.exe
912	rundll32.exe
912	rundll32.exe
912	rundll32.exe
912	rundll32.exe
912	rundll32.exe
912	rundll32.exe
912	rundll32.exe
912	rundll32.exe
912	rundll32.exe
912	rundll32.exe
912	rundll32.exe
912	rundll32.exe
912	rundll32.exe
912	rundll32.exe
912	rundll32.exe
912	rundll32.exe
912	rundll32.exe
912	rundll32.exe
912	rundll32.exe
912	rundll32.exe
912	rundll32.exe
912	rundll32.exe
912	rundll32.exe
912	rundll32.exe
912	rundll32.exe
912	rundll32.exe
912	rundll32.exe
912	rundll32.exe
912	rundll32.exe
912	rundll32.exe
912	rundll32.exe
912	rundll32.exe
912	rundll32.exe
912	rundll32.exe
912	rundll32.exe
912	rundll32.exe
912	rundll32.exe
912	rundll32.exe
912	rundll32.exe
912	rundll32.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 988 wrote to memory of 912	988	cmd.exe	28
PID 988 wrote to memory of 912	988	cmd.exe	28
PID 988 wrote to memory of 912	988	cmd.exe	28

C:\Windows\system32\cmd.exe
cmd /c "C:\Users\Admin\AppData\Local\Temp\loader.bat"
1⤵
- Suspicious use of WriteProcessMemory
PID:988
- C:\Windows\system32\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\n3zarek.dll,RoOEiztJvW
  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:912