bumblebee | 1249075a0c4af8ecfeb4a3ab1e9ef692cb8876591d73f3470106402ab1592717

Target

arch.dll
Size

1.9MB
MD5

16da4284ab7ab9d5669c34c339132ed6
SHA1

34dc625fc243d06cbc33d403ac7ee05edfd32819
SHA256

1249075a0c4af8ecfeb4a3ab1e9ef692cb8876591d73f3470106402ab1592717
SHA512

b4bbbb6467a7602b5b2789a66ca343f3706fe1e15a13e639951adaa9a06b8cd97ba6ee6f05340dea679306b22fa7de02ab45b532f1e0de0abd429a9982b68923

Score

10^/10

bumblebee 2lg5 evasion trojan

Malware Config

Extracted

Family

bumblebee

Botnet

2lg5

23.254.229.131:443

79.110.52.71:443

51.75.62.99:443

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\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-1-5-21-3297182285-798020602-2032295036-1000\SOFTWARE\Wine	rundll32.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
4396	rundll32.exe
4396	rundll32.exe
4396	rundll32.exe
4396	rundll32.exe
4396	rundll32.exe
4396	rundll32.exe
4396	rundll32.exe
4396	rundll32.exe
4396	rundll32.exe
4396	rundll32.exe
4396	rundll32.exe
4396	rundll32.exe
4396	rundll32.exe
4396	rundll32.exe
4396	rundll32.exe
4396	rundll32.exe
4396	rundll32.exe
4396	rundll32.exe
4396	rundll32.exe
4396	rundll32.exe
4396	rundll32.exe
4396	rundll32.exe
4396	rundll32.exe
4396	rundll32.exe
4396	rundll32.exe
4396	rundll32.exe
4396	rundll32.exe
4396	rundll32.exe
4396	rundll32.exe
4396	rundll32.exe
4396	rundll32.exe
4396	rundll32.exe
4396	rundll32.exe
4396	rundll32.exe
4396	rundll32.exe
4396	rundll32.exe
4396	rundll32.exe
4396	rundll32.exe
4396	rundll32.exe
4396	rundll32.exe
4396	rundll32.exe
4396	rundll32.exe
4396	rundll32.exe
4396	rundll32.exe
4396	rundll32.exe
4396	rundll32.exe
4396	rundll32.exe
4396	rundll32.exe
4396	rundll32.exe
4396	rundll32.exe
4396	rundll32.exe
4396	rundll32.exe
4396	rundll32.exe
4396	rundll32.exe
4396	rundll32.exe
4396	rundll32.exe
4396	rundll32.exe
4396	rundll32.exe
4396	rundll32.exe
4396	rundll32.exe
4396	rundll32.exe
4396	rundll32.exe
4396	rundll32.exe
4396	rundll32.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 1948 wrote to memory of 4396	1948	cmd.exe	73
PID 1948 wrote to memory of 4396	1948	cmd.exe	73

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\arch.dll,#1
1⤵
PID:1916

C:\Windows\System32\rundll32.exe
C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
1⤵
PID:1312

C:\Windows\System32\cmd.exe
"C:\Windows\System32\cmd.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1948
- C:\Windows\system32\rundll32.exe
  rundll32.exe arch.dll oUlluzkNOs
  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:4396

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Virtualization/Sandbox Evasion

T1497

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Virtualization/Sandbox Evasion

T1497

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/4396-118-0x000001FC03FB0000-0x000001FC040C7000-memory.dmp

Filesize
1.1MB

Download
memory/4396-119-0x00007FFAA4220000-0x00007FFAA4223000-memory.dmp

Filesize
12KB

Download