bumblebee | 2b379f9fd440fb0e6d5e6dc6f65c4fbf17d31840add7f182ceec78514cedd94a

General

Target

documents.lnk
Size

995B
MD5

657e82d44e6e48dc6cb9822bc074e37b
SHA1

2a8f2a505b1fe7dec3550cc5b2d1969a7aec91a2
SHA256

9d3b6e8b7bd58f0ff72fb9188e4aefdd988fa86d81043f2850f335bea004b182
SHA512

16759c899c1c08688885ba4c9b5d8b3a43583b5d2bd8ce3824a0de422cc34dfe5385241e058d7f1862b4a4de0f5ed1727b1a41e0d0e00b87fd7b444d6924ce9a

Score

10^/10

bumblebee 2510 evasion trojan

Malware Config

Extracted

Family

bumblebee

Botnet

2510

C2

69.46.15.158:443

135.125.241.35:443

172.86.120.141:443

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\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
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\VBoxVideo	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-1-5-21-999675638-2867687379-27515722-1000\SOFTWARE\Wine	rundll32.exe

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
1764	rundll32.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 42 IoCs

pid	Process
1764	rundll32.exe
1764	rundll32.exe
1764	rundll32.exe
1764	rundll32.exe
1764	rundll32.exe
1764	rundll32.exe
1764	rundll32.exe
1764	rundll32.exe
1764	rundll32.exe
1764	rundll32.exe
1764	rundll32.exe
1764	rundll32.exe
1764	rundll32.exe
1764	rundll32.exe
1764	rundll32.exe
1764	rundll32.exe
1764	rundll32.exe
1764	rundll32.exe
1764	rundll32.exe
1764	rundll32.exe
1764	rundll32.exe
1764	rundll32.exe
1764	rundll32.exe
1764	rundll32.exe
1764	rundll32.exe
1764	rundll32.exe
1764	rundll32.exe
1764	rundll32.exe
1764	rundll32.exe
1764	rundll32.exe
1764	rundll32.exe
1764	rundll32.exe
1764	rundll32.exe
1764	rundll32.exe
1764	rundll32.exe
1764	rundll32.exe
1764	rundll32.exe
1764	rundll32.exe
1764	rundll32.exe
1764	rundll32.exe
1764	rundll32.exe
1764	rundll32.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1992 wrote to memory of 1800	1992	cmd.exe	27
PID 1992 wrote to memory of 1800	1992	cmd.exe	27
PID 1992 wrote to memory of 1800	1992	cmd.exe	27
PID 1800 wrote to memory of 1764	1800	cmd.exe	28
PID 1800 wrote to memory of 1764	1800	cmd.exe	28
PID 1800 wrote to memory of 1764	1800	cmd.exe	28

C:\Windows\system32\cmd.exe
cmd /c C:\Users\Admin\AppData\Local\Temp\documents.lnk
1⤵
- Suspicious use of WriteProcessMemory
PID:1992
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c OUBcVbISpNCsLG.bat
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1800
- - C:\Windows\system32\rundll32.exe
    rundll32 lXNqexIxTwBWAS.dll,newrequest
    3⤵
    - 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 use of NtCreateThreadExHideFromDebugger
    - Suspicious behavior: EnumeratesProcesses
    PID:1764

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Virtualization/Sandbox Evasion

4

T1497

Credential Access

Discovery

Query Registry

5

T1012

System Information Discovery

2

T1082

Virtualization/Sandbox Evasion

4

T1497

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/1764-90-0x0000000001D80000-0x0000000001ED3000-memory.dmp

Filesize
1.3MB

Download
memory/1992-54-0x000007FEFBE81000-0x000007FEFBE83000-memory.dmp

Filesize
8KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads