bumblebee | 5c15151a29fab8a2d58fa55aa6c88a58a456b0a6bc959b843e9ceb2295c61885

Analysis

max time kernel
1246s
max time network
1252s
platform
windows7_x64
resource
win7-20220901-en
resource tags

arch:x64arch:x86image:win7-20220901-enlocale:en-usos:windows7-x64system
submitted
31-10-2022 20:40

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General

Target

evwvwet543yc0.dll
Size

2.8MB
MD5

63a316eba32ceedb0a6f2c02499fee0d
SHA1

c95091727e0b80206bc08fe6f5419f7fa0b6a719
SHA256

5c15151a29fab8a2d58fa55aa6c88a58a456b0a6bc959b843e9ceb2295c61885
SHA512

9d17db2d937cffee92c1897e26db01bc1d41262f4aae4fcb6746ddc897a00e901686dab876a3fa48a682efcd617b05dfaa0522f066f6dfca7a54fbda921917ac
SSDEEP

49152:AY1LnDpAyAelZQtflyyyuSXfiCC8M7vZ+x1BxkJj52DTUFPRAK8hVgi:3pDAZlyyyuSXfiCC8M7vZ+x1BxkJjKUq

Score

10^/10

bumblebee 2809 evasion trojan

Malware Config

Extracted

Family

bumblebee

Botnet

2809

224.56.150.48:443

209.141.41.150:443

192.119.68.104:443

51.83.249.124:443

rc4.plain

Signatures

BumbleBee
BumbleBee is a webshell malware written in C++.
trojan bumblebee

Enumerates VirtualBox registry keys 2 TTPs 10 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\VBoxService	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\VBoxSF	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\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\VBoxVideo	rundll32.exe

Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs 6 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
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 2 IoCs

evasion

Query Registry

T1012

Virtualization/Sandbox Evasion

T1497

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SOFTWARE\Oracle\VirtualBox Guest Additions	rundll32.exe
Key opened	\REGISTRY\MACHINE\SOFTWARE\Oracle\VirtualBox Guest Additions	rundll32.exe

Checks BIOS information in registry 2 TTPs 6 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
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 2 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-1-5-21-4063495947-34355257-727531523-1000\SOFTWARE\Wine	rundll32.exe
Key opened	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\SOFTWARE\Wine	rundll32.exe

Suspicious use of NtCreateThreadExHideFromDebugger 2 IoCs

pid	Process
2020	rundll32.exe
1968	rundll32.exe

Program crash 2 IoCs

pid	pid_target	Process	procid_target
2024	1328	WerFault.exe	8
1404	1384	WerFault.exe	29

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
2020	rundll32.exe
2020	rundll32.exe
2020	rundll32.exe
2020	rundll32.exe
2020	rundll32.exe
2020	rundll32.exe
2020	rundll32.exe
2020	rundll32.exe
2020	rundll32.exe
2020	rundll32.exe
2020	rundll32.exe
2020	rundll32.exe
2020	rundll32.exe
2020	rundll32.exe
2020	rundll32.exe
2020	rundll32.exe
2020	rundll32.exe
2020	rundll32.exe
2020	rundll32.exe
2020	rundll32.exe
2020	rundll32.exe
2020	rundll32.exe
2020	rundll32.exe
2020	rundll32.exe
2020	rundll32.exe
2020	rundll32.exe
2020	rundll32.exe
2020	rundll32.exe
2020	rundll32.exe
2020	rundll32.exe
2020	rundll32.exe
2020	rundll32.exe
2020	rundll32.exe
2020	rundll32.exe
2020	rundll32.exe
2020	rundll32.exe
2020	rundll32.exe
2020	rundll32.exe
2020	rundll32.exe
2020	rundll32.exe
2020	rundll32.exe
2020	rundll32.exe
1968	rundll32.exe
1968	rundll32.exe
1968	rundll32.exe
1968	rundll32.exe
1968	rundll32.exe
1968	rundll32.exe
1968	rundll32.exe
1968	rundll32.exe
1968	rundll32.exe
1968	rundll32.exe
1968	rundll32.exe
1968	rundll32.exe
1968	rundll32.exe
1968	rundll32.exe
1968	rundll32.exe
1968	rundll32.exe
1968	rundll32.exe
1968	rundll32.exe
1968	rundll32.exe
1968	rundll32.exe
1968	rundll32.exe
1968	rundll32.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 1328 wrote to memory of 2024	1328	rundll32.exe	26
PID 1328 wrote to memory of 2024	1328	rundll32.exe	26
PID 1328 wrote to memory of 2024	1328	rundll32.exe	26
PID 808 wrote to memory of 1384	808	cmd.exe	29
PID 808 wrote to memory of 1384	808	cmd.exe	29
PID 808 wrote to memory of 1384	808	cmd.exe	29
PID 1384 wrote to memory of 1404	1384	rundll32.exe	30
PID 1384 wrote to memory of 1404	1384	rundll32.exe	30
PID 1384 wrote to memory of 1404	1384	rundll32.exe	30
PID 808 wrote to memory of 2020	808	cmd.exe	31
PID 808 wrote to memory of 2020	808	cmd.exe	31
PID 808 wrote to memory of 2020	808	cmd.exe	31

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\evwvwet543yc0.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1328
- C:\Windows\system32\WerFault.exe
  C:\Windows\system32\WerFault.exe -u -p 1328 -s 84
  2⤵
  - Program crash
  PID:2024

C:\Windows\system32\cmd.exe
"C:\Windows\system32\cmd.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:808
- C:\Windows\system32\rundll32.exe
  rundll32 evwvwet543yc0.dll,#2
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1384
- - C:\Windows\system32\WerFault.exe
    C:\Windows\system32\WerFault.exe -u -p 1384 -s 84
    3⤵
    - Program crash
    PID:1404
- C:\Windows\system32\rundll32.exe
  rundll32 evwvwet543yc0.dll,#3
  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 use of NtCreateThreadExHideFromDebugger
  - Suspicious behavior: EnumeratesProcesses
  PID:2020

C:\Windows\system32\cmd.exe
"C:\Windows\system32\cmd.exe"
1⤵
PID:1988
- C:\Windows\system32\rundll32.exe
  rundll32 evwvwet543yc0.dll,#3
  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 use of NtCreateThreadExHideFromDebugger
  - Suspicious behavior: EnumeratesProcesses
  PID:1968

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

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Downloads

memory/1968-59-0x0000000001DC0000-0x0000000001F13000-memory.dmp

Filesize
1.3MB

Download
memory/2020-58-0x0000000002010000-0x0000000002163000-memory.dmp

Filesize
1.3MB

Download