bumblebee | c99d8022ba102c4152c0bb445a4cb90616bf77d9ad329432cacbe1243068bd5f

Analysis

max time kernel
186s
max time network
195s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
09-11-2022 12:09

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General

Target

uk1108.xlsm
Size

56KB
MD5

fed5ca25e44378f5d0855ff53471a0fd
SHA1

07e15c01242644b8ba067e19dc5e2cda116ad66d
SHA256

c99d8022ba102c4152c0bb445a4cb90616bf77d9ad329432cacbe1243068bd5f
SHA512

2bbf20c069db84df6fc6bba863e5942b4c4289b026ba23dd1b8dc88078871f1e891fa6828d97c03af03f465af8499080b31150f2574298af500517821730be28
SSDEEP

768:m9x5Mu+xWpt1J3S5f3v4Jfa3ODVs3KnooaRHIuZVvgEeqI54f5Wl:eHMu+xWLC5/wJi3eVsdtLVvm+0l

Score

10^/10

bumblebee 0411r trojan

Malware Config

Extracted

Family

bumblebee

Botnet

0411r

172.86.121.123:443

176.223.165.125:443

45.66.248.216:443

rc4.plain

Signatures

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

Process spawned unexpected child process 1 IoCs

This typically indicates the parent process was compromised via an exploit or macro.

description	pid	pid_target	Process	procid_target
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	896	4444	rundll32.exe	77

Downloads MZ/PE file

Loads dropped DLL 1 IoCs

pid	Process
896	rundll32.exe

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
896	rundll32.exe

Checks processor information in registry 2 TTPs 3 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	EXCEL.EXE

Enumerates system info in registry 2 TTPs 3 IoCs

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\BIOS	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemFamily	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU	EXCEL.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
4444	EXCEL.EXE

Suspicious use of SetWindowsHookEx 12 IoCs

pid	Process
4444	EXCEL.EXE
4444	EXCEL.EXE
4444	EXCEL.EXE
4444	EXCEL.EXE
4444	EXCEL.EXE
4444	EXCEL.EXE
4444	EXCEL.EXE
4444	EXCEL.EXE
4444	EXCEL.EXE
4444	EXCEL.EXE
4444	EXCEL.EXE
4444	EXCEL.EXE

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 4444 wrote to memory of 896	4444	EXCEL.EXE	87
PID 4444 wrote to memory of 896	4444	EXCEL.EXE	87

C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE
"C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE" "C:\Users\Admin\AppData\Local\Temp\uk1108.xlsm"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4444
- C:\Windows\SYSTEM32\rundll32.exe
  rundll32 name.dll,SendData
  2⤵
  - Process spawned unexpected child process
  - Loads dropped DLL
  - Suspicious use of NtCreateThreadExHideFromDebugger
  PID:896

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\Documents\name.dll

Filesize
994KB

MD5
557dc6188b5bd3f5385489efd5eb9c9e

SHA1
78364c3ed0c86b012434ca6f482271d400d1f287

SHA256
def313ac6db22932e42ae1d62c1ce190c620a06bde637258bd79e21561b41163

SHA512
b4d0e3ca1a06007e0ad5d71e054376bc20582b34cd8fe8ff82c7c578f5a9fc367c2da245f79aa823ffc4b2a473dff9a385adb3208f9c39cbe31c7205caec970b

Download Submit
C:\Users\Admin\Documents\name.dll

Filesize
994KB

MD5
557dc6188b5bd3f5385489efd5eb9c9e

SHA1
78364c3ed0c86b012434ca6f482271d400d1f287

SHA256
def313ac6db22932e42ae1d62c1ce190c620a06bde637258bd79e21561b41163

SHA512
b4d0e3ca1a06007e0ad5d71e054376bc20582b34cd8fe8ff82c7c578f5a9fc367c2da245f79aa823ffc4b2a473dff9a385adb3208f9c39cbe31c7205caec970b

Download Submit
memory/896-142-0x0000026527090000-0x00000265271D9000-memory.dmp

Filesize
1.3MB

Download
memory/896-143-0x0000026526ED0000-0x0000026526F46000-memory.dmp

Filesize
472KB

Download
memory/4444-132-0x00007FFEC6450000-0x00007FFEC6460000-memory.dmp

Filesize
64KB

Download
memory/4444-133-0x00007FFEC6450000-0x00007FFEC6460000-memory.dmp

Filesize
64KB

Download
memory/4444-134-0x00007FFEC6450000-0x00007FFEC6460000-memory.dmp

Filesize
64KB

Download
memory/4444-135-0x00007FFEC6450000-0x00007FFEC6460000-memory.dmp

Filesize
64KB

Download
memory/4444-136-0x00007FFEC6450000-0x00007FFEC6460000-memory.dmp

Filesize
64KB

Download
memory/4444-137-0x00007FFEC40F0000-0x00007FFEC4100000-memory.dmp

Filesize
64KB

Download
memory/4444-138-0x00007FFEC40F0000-0x00007FFEC4100000-memory.dmp

Filesize
64KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads