bumblebee | 5cf736ccf0952dc2b6b1cac95841947e5436b690d2f2949f17d5100e8d2e40ab

General

Target

install.bat
Size

33B
MD5

7eb1c4dd9c71972cfb9f97a84393095c
SHA1

e88433f7d787f119ae28a7b30263372462388344
SHA256

b9761b63f5538662fba077ef05a16594fec5cf7ee9ec350e9c1b504fcc9ff438
SHA512

72c2d50ebea8b4c9d2700d39d1ba7adae8c4f90678080c557d1d39ba1deb79553105c44e61318b0df0e0f66d10d19226536096e98cf2219891a2aadb91a8f021

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\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
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\VBoxService	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-1-5-21-1083475884-596052423-1669053738-1000\SOFTWARE\Wine	rundll32.exe

Suspicious behavior: EnumeratesProcesses 41 IoCs

pid	Process
952	rundll32.exe
952	rundll32.exe
952	rundll32.exe
952	rundll32.exe
952	rundll32.exe
952	rundll32.exe
952	rundll32.exe
952	rundll32.exe
952	rundll32.exe
952	rundll32.exe
952	rundll32.exe
952	rundll32.exe
952	rundll32.exe
952	rundll32.exe
952	rundll32.exe
952	rundll32.exe
952	rundll32.exe
952	rundll32.exe
952	rundll32.exe
952	rundll32.exe
952	rundll32.exe
952	rundll32.exe
952	rundll32.exe
952	rundll32.exe
952	rundll32.exe
952	rundll32.exe
952	rundll32.exe
952	rundll32.exe
952	rundll32.exe
952	rundll32.exe
952	rundll32.exe
952	rundll32.exe
952	rundll32.exe
952	rundll32.exe
952	rundll32.exe
952	rundll32.exe
952	rundll32.exe
952	rundll32.exe
952	rundll32.exe
952	rundll32.exe
952	rundll32.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 904 wrote to memory of 952	904	cmd.exe	29
PID 904 wrote to memory of 952	904	cmd.exe	29
PID 904 wrote to memory of 952	904	cmd.exe	29

C:\Windows\system32\cmd.exe
cmd /c "C:\Users\Admin\AppData\Local\Temp\install.bat"
1⤵
- Suspicious use of WriteProcessMemory
PID:904
- C:\Windows\system32\rundll32.exe
  rundll32 rec.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:952