bumblebee | a54302b0bf056c65deb759122f71e757b11155d82e648f9e206dab91aab44bd4

Analysis

max time kernel
141s
max time network
148s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
26-02-2024 21:58

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

a54302b0bf056c65deb759122f71e757b11155d82e648f9e206dab91aab44bd4.dll
Size

2.6MB
MD5

39fb644929c57fb75aace407f429cb12
SHA1

f449e79493fcf15dc870466e2ea639d2cbcd8e14
SHA256

a54302b0bf056c65deb759122f71e757b11155d82e648f9e206dab91aab44bd4
SHA512

b32fbd9bc5a58a449199d11decbd1006571ccc849dfcc839477bc457f522fe9f2ca11f3d55ef31978ac0c5e0f811b6e339ecef4c64724b7cf4aedf8d524daade
SSDEEP

49152:K61vkm5V04xOerjOXpe6ZZ1S71F1Q6pn2OL4wC548J3Y5kU:K6Nkm5V04xOerjOXpe2Z1S71UgLq5JJ

Score

10^/10

bumblebee 25html evasion loader

Malware Config

Extracted

Family

bumblebee

Botnet

25html

23.83.134.136:443

138.201.190.52:443

rc4.plain

Signatures

BumbleBee
BumbleBee is a loader malware written in C++.
loader bumblebee

Detects executables referencing many IR and analysis tools 15 IoCs

resource	yara_rule
behavioral2/memory/4128-2-0x0000021FBE790000-0x0000021FBE9DB000-memory.dmp	INDICATOR_SUSPICIOUS_References_SecTools
behavioral2/memory/4128-0-0x0000021FBE790000-0x0000021FBE9DB000-memory.dmp	INDICATOR_SUSPICIOUS_References_SecTools
behavioral2/memory/4128-9-0x0000021FBE790000-0x0000021FBE9DB000-memory.dmp	INDICATOR_SUSPICIOUS_References_SecTools
behavioral2/memory/4128-10-0x0000021FBE790000-0x0000021FBE9DB000-memory.dmp	INDICATOR_SUSPICIOUS_References_SecTools
behavioral2/memory/4128-12-0x0000021FBE790000-0x0000021FBE9DB000-memory.dmp	INDICATOR_SUSPICIOUS_References_SecTools
behavioral2/memory/4128-13-0x0000021FBE790000-0x0000021FBE9DB000-memory.dmp	INDICATOR_SUSPICIOUS_References_SecTools
behavioral2/memory/4128-14-0x0000021FBE790000-0x0000021FBE9DB000-memory.dmp	INDICATOR_SUSPICIOUS_References_SecTools
behavioral2/memory/4128-15-0x0000021FBE790000-0x0000021FBE9DB000-memory.dmp	INDICATOR_SUSPICIOUS_References_SecTools
behavioral2/memory/4128-16-0x0000021FBE790000-0x0000021FBE9DB000-memory.dmp	INDICATOR_SUSPICIOUS_References_SecTools
behavioral2/memory/4128-17-0x0000021FBE790000-0x0000021FBE9DB000-memory.dmp	INDICATOR_SUSPICIOUS_References_SecTools
behavioral2/memory/4128-18-0x0000021FBE790000-0x0000021FBE9DB000-memory.dmp	INDICATOR_SUSPICIOUS_References_SecTools
behavioral2/memory/4128-19-0x0000021FBE790000-0x0000021FBE9DB000-memory.dmp	INDICATOR_SUSPICIOUS_References_SecTools
behavioral2/memory/4128-20-0x0000021FBE790000-0x0000021FBE9DB000-memory.dmp	INDICATOR_SUSPICIOUS_References_SecTools
behavioral2/memory/4128-21-0x0000021FBE790000-0x0000021FBE9DB000-memory.dmp	INDICATOR_SUSPICIOUS_References_SecTools
behavioral2/memory/4128-22-0x0000021FBE790000-0x0000021FBE9DB000-memory.dmp	INDICATOR_SUSPICIOUS_References_SecTools

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\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
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\VBoxService	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 6 IoCs

flow	pid	Process
24	4128	rundll32.exe
33	4128	rundll32.exe
34	4128	rundll32.exe
42	4128	rundll32.exe
46	4128	rundll32.exe
47	4128	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-1-5-21-3808065738-1666277613-1125846146-1000\SOFTWARE\Wine	rundll32.exe

Checks for VirtualBox DLLs, possible anti-VM trick 1 TTPs 1 IoCs

Certain files are specific to VirtualBox VMs and can be used to detect execution in a VM.

System Information Discovery

T1082

description	ioc	Process
File opened (read-only)	\??\VBoxMiniRdrDN	rundll32.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
4128	rundll32.exe
4128	rundll32.exe
4128	rundll32.exe
4128	rundll32.exe
4128	rundll32.exe
4128	rundll32.exe
4128	rundll32.exe
4128	rundll32.exe
4128	rundll32.exe
4128	rundll32.exe
4128	rundll32.exe
4128	rundll32.exe
4128	rundll32.exe
4128	rundll32.exe
4128	rundll32.exe
4128	rundll32.exe
4128	rundll32.exe
4128	rundll32.exe
4128	rundll32.exe
4128	rundll32.exe
4128	rundll32.exe
4128	rundll32.exe
4128	rundll32.exe
4128	rundll32.exe
4128	rundll32.exe
4128	rundll32.exe
4128	rundll32.exe
4128	rundll32.exe
4128	rundll32.exe
4128	rundll32.exe
4128	rundll32.exe
4128	rundll32.exe
4128	rundll32.exe
4128	rundll32.exe
4128	rundll32.exe
4128	rundll32.exe
4128	rundll32.exe
4128	rundll32.exe
4128	rundll32.exe
4128	rundll32.exe
4128	rundll32.exe
4128	rundll32.exe
4128	rundll32.exe
4128	rundll32.exe
4128	rundll32.exe
4128	rundll32.exe
4128	rundll32.exe
4128	rundll32.exe
4128	rundll32.exe
4128	rundll32.exe
4128	rundll32.exe
4128	rundll32.exe
4128	rundll32.exe
4128	rundll32.exe
4128	rundll32.exe
4128	rundll32.exe
4128	rundll32.exe
4128	rundll32.exe
4128	rundll32.exe
4128	rundll32.exe
4128	rundll32.exe
4128	rundll32.exe
4128	rundll32.exe
4128	rundll32.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\a54302b0bf056c65deb759122f71e757b11155d82e648f9e206dab91aab44bd4.dll,#1
1⤵
- Enumerates VirtualBox registry keys
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Looks for VirtualBox Guest Additions in registry
- Blocklisted process makes network request
- Checks BIOS information in registry
- Identifies Wine through registry keys
- Checks for VirtualBox DLLs, possible anti-VM trick
- Suspicious behavior: EnumeratesProcesses
PID:4128

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=4064 --field-trial-handle=2356,i,13261194862334667799,7441241219475888176,262144 --variations-seed-version /prefetch:8
1⤵
PID:2860

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

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

Loading Replay Monitor...

Downloads

memory/4128-3-0x00007FFFC4C70000-0x00007FFFC4E65000-memory.dmp

Filesize
2.0MB

Download
memory/4128-2-0x0000021FBE790000-0x0000021FBE9DB000-memory.dmp

Filesize
2.3MB

Download
memory/4128-1-0x00007FFFC4C70000-0x00007FFFC4E65000-memory.dmp

Filesize
2.0MB

Download
memory/4128-0-0x0000021FBE790000-0x0000021FBE9DB000-memory.dmp

Filesize
2.3MB

Download
memory/4128-4-0x00007FFFC4C70000-0x00007FFFC4E65000-memory.dmp

Filesize
2.0MB

Download
memory/4128-5-0x00007FFFC4C70000-0x00007FFFC4E65000-memory.dmp

Filesize
2.0MB

Download
memory/4128-6-0x00007FFFC4C70000-0x00007FFFC4E65000-memory.dmp

Filesize
2.0MB

Download
memory/4128-7-0x00007FFFC4C70000-0x00007FFFC4E65000-memory.dmp

Filesize
2.0MB

Download
memory/4128-8-0x00007FFFC4C60000-0x00007FFFC4C70000-memory.dmp

Filesize
64KB

Download
memory/4128-9-0x0000021FBE790000-0x0000021FBE9DB000-memory.dmp

Filesize
2.3MB

Download
memory/4128-10-0x0000021FBE790000-0x0000021FBE9DB000-memory.dmp

Filesize
2.3MB

Download
memory/4128-11-0x00007FFFC4C70000-0x00007FFFC4E65000-memory.dmp

Filesize
2.0MB

Download
memory/4128-12-0x0000021FBE790000-0x0000021FBE9DB000-memory.dmp

Filesize
2.3MB

Download
memory/4128-13-0x0000021FBE790000-0x0000021FBE9DB000-memory.dmp

Filesize
2.3MB

Download
memory/4128-14-0x0000021FBE790000-0x0000021FBE9DB000-memory.dmp

Filesize
2.3MB

Download
memory/4128-15-0x0000021FBE790000-0x0000021FBE9DB000-memory.dmp

Filesize
2.3MB

Download
memory/4128-16-0x0000021FBE790000-0x0000021FBE9DB000-memory.dmp

Filesize
2.3MB

Download
memory/4128-17-0x0000021FBE790000-0x0000021FBE9DB000-memory.dmp

Filesize
2.3MB

Download
memory/4128-18-0x0000021FBE790000-0x0000021FBE9DB000-memory.dmp

Filesize
2.3MB

Download
memory/4128-19-0x0000021FBE790000-0x0000021FBE9DB000-memory.dmp

Filesize
2.3MB

Download
memory/4128-20-0x0000021FBE790000-0x0000021FBE9DB000-memory.dmp

Filesize
2.3MB

Download
memory/4128-21-0x0000021FBE790000-0x0000021FBE9DB000-memory.dmp

Filesize
2.3MB

Download
memory/4128-22-0x0000021FBE790000-0x0000021FBE9DB000-memory.dmp

Filesize
2.3MB

Download