Malware Analysis Report

2024-10-23 15:36

Sample ID 230914-kr6pxsag7v
Target a6ac1a8bb63362ed7515f2ca02fb52be.exe
SHA256 e1dbce8a89b5fea0f3cf6da9560fd573dfe9c93c5d6d8d2fef8902a3589cdf15
Tags
bumblebee js1 trojan
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

e1dbce8a89b5fea0f3cf6da9560fd573dfe9c93c5d6d8d2fef8902a3589cdf15

Threat Level: Known bad

The file a6ac1a8bb63362ed7515f2ca02fb52be.exe was found to be: Known bad.

Malicious Activity Summary

bumblebee js1 trojan

BumbleBee

Suspicious use of NtCreateThreadExHideFromDebugger

Drops file in System32 directory

Unsigned PE

Checks processor information in registry

Enumerates system info in registry

Uses Task Scheduler COM API

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2023-09-14 08:51

Signatures

Unsigned PE

Description Indicator Process Target
N/A N/A N/A N/A

Analysis: behavioral1

Detonation Overview

Submitted

2023-09-14 08:51

Reported

2023-09-14 08:53

Platform

win7-20230831-en

Max time kernel

120s

Max time network

123s

Command Line

regsvr32 /s C:\Users\Admin\AppData\Local\Temp\a6ac1a8bb63362ed7515f2ca02fb52be.dll

Signatures

BumbleBee

trojan bumblebee

Suspicious use of NtCreateThreadExHideFromDebugger

Description Indicator Process Target
N/A N/A C:\Windows\system32\regsvr32.exe N/A

Processes

C:\Windows\system32\regsvr32.exe

regsvr32 /s C:\Users\Admin\AppData\Local\Temp\a6ac1a8bb63362ed7515f2ca02fb52be.dll

Network

Country Destination Domain Proto
US 8.8.8.8:53 v5b6ml4o0nq.life udp
DE 116.203.151.240:443 v5b6ml4o0nq.life tcp

Files

memory/1116-0-0x0000000001E60000-0x0000000001ED9000-memory.dmp

memory/1116-1-0x0000000077740000-0x00000000778E9000-memory.dmp

memory/1116-2-0x0000000001FF0000-0x00000000020FA000-memory.dmp

memory/1116-4-0x0000000077740000-0x00000000778E9000-memory.dmp

memory/1116-5-0x0000000001FF0000-0x00000000020FA000-memory.dmp

memory/1116-6-0x0000000001FF0000-0x00000000020FA000-memory.dmp

memory/1116-7-0x0000000001E60000-0x0000000001ED9000-memory.dmp

memory/1116-8-0x0000000077740000-0x00000000778E9000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2023-09-14 08:51

Reported

2023-09-14 08:53

Platform

win10v2004-20230831-en

Max time kernel

143s

Max time network

148s

Command Line

C:\Windows\System32\svchost.exe -k netsvcs -p

Signatures

BumbleBee

trojan bumblebee

Drops file in System32 directory

Description Indicator Process Target
File created C:\Windows\system32\config\systemprofile\AppData\Local\Microsoft\InstallService\{19843BFB-B491-4721-8BA9-CB88D55B767E}.catalogItem C:\Windows\System32\svchost.exe N/A

Suspicious use of NtCreateThreadExHideFromDebugger

Description Indicator Process Target
N/A N/A C:\Windows\system32\regsvr32.exe N/A

Checks processor information in registry

Description Indicator Process Target
Key opened \REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0 C:\Windows\System32\svchost.exe N/A
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz C:\Windows\System32\svchost.exe N/A
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString C:\Windows\System32\svchost.exe N/A

Enumerates system info in registry

Description Indicator Process Target
Key opened \REGISTRY\MACHINE\Hardware\Description\System\BIOS C:\Windows\System32\svchost.exe N/A
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU C:\Windows\System32\svchost.exe N/A

Uses Task Scheduler COM API

persistence

Processes

C:\Windows\System32\svchost.exe

C:\Windows\System32\svchost.exe -k netsvcs -p

C:\Windows\system32\regsvr32.exe

regsvr32 /s C:\Users\Admin\AppData\Local\Temp\a6ac1a8bb63362ed7515f2ca02fb52be.dll

Network

Country Destination Domain Proto
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 23.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 240.221.184.93.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 208.194.73.20.in-addr.arpa udp
US 8.8.8.8:53 9.228.82.20.in-addr.arpa udp
US 8.8.8.8:53 41.110.16.96.in-addr.arpa udp
US 8.8.8.8:53 55.36.223.20.in-addr.arpa udp
US 8.8.8.8:53 v5b6ml4o0nq.life udp
DE 116.203.151.240:443 v5b6ml4o0nq.life tcp
US 8.8.8.8:53 240.151.203.116.in-addr.arpa udp
US 8.8.8.8:53 158.240.127.40.in-addr.arpa udp
US 8.8.8.8:53 183.59.114.20.in-addr.arpa udp
US 8.8.8.8:53 206.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 254.1.248.8.in-addr.arpa udp
US 8.8.8.8:53 63.141.182.52.in-addr.arpa udp

Files

memory/2432-5-0x0000000002780000-0x00000000027F9000-memory.dmp

memory/2432-7-0x00007FFC5FD30000-0x00007FFC5FF25000-memory.dmp

memory/2432-6-0x0000000002950000-0x0000000002A5A000-memory.dmp

memory/2432-9-0x0000000002950000-0x0000000002A5A000-memory.dmp

memory/2432-11-0x0000000002950000-0x0000000002A5A000-memory.dmp

memory/2432-10-0x00007FFC5FD30000-0x00007FFC5FF25000-memory.dmp

memory/2432-8-0x00007FFC5FD30000-0x00007FFC5FF25000-memory.dmp

memory/2432-14-0x0000000002950000-0x0000000002A5A000-memory.dmp

memory/2432-15-0x0000000002780000-0x00000000027F9000-memory.dmp

memory/2432-16-0x00007FFC5FD30000-0x00007FFC5FF25000-memory.dmp