bumblebee | bb66936f868620ed0756cb95e926e72b74bc06fff28e70f74c4782c92138d197

General

Target

timi4r.dll
Size

1.7MB
MD5

c2431e5037bdcbc7573520ea8c99ff87
SHA1

8a4f5bcb62f7eb290fd4c903eb15ff58be9f5aa5
SHA256

6aa4da1ac218390e6cb97bcc7c5483ab4815c5e5b075ea86da8f123d25e9832d
SHA512

46452afb80f78f8a7b4c120cac8071e4e7e5e13f03663901c901aa20f7df4a1091ad2f55970087e5c3151115df206e0e09764655d22671535973b1eb2395c7fa

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\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
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\VBoxSF	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\VideoBiosVersion	rundll32.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosDate	rundll32.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	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-1-5-21-790309383-526510583-3802439154-1000\SOFTWARE\Wine	rundll32.exe

Suspicious behavior: EnumeratesProcesses 41 IoCs

pid	Process
748	rundll32.exe
748	rundll32.exe
748	rundll32.exe
748	rundll32.exe
748	rundll32.exe
748	rundll32.exe
748	rundll32.exe
748	rundll32.exe
748	rundll32.exe
748	rundll32.exe
748	rundll32.exe
748	rundll32.exe
748	rundll32.exe
748	rundll32.exe
748	rundll32.exe
748	rundll32.exe
748	rundll32.exe
748	rundll32.exe
748	rundll32.exe
748	rundll32.exe
748	rundll32.exe
748	rundll32.exe
748	rundll32.exe
748	rundll32.exe
748	rundll32.exe
748	rundll32.exe
748	rundll32.exe
748	rundll32.exe
748	rundll32.exe
748	rundll32.exe
748	rundll32.exe
748	rundll32.exe
748	rundll32.exe
748	rundll32.exe
748	rundll32.exe
748	rundll32.exe
748	rundll32.exe
748	rundll32.exe
748	rundll32.exe
748	rundll32.exe
748	rundll32.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\timi4r.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:748