bumblebee | cb45fc44b2fe203c3825a5ed5342a82288e5517e5d5ed711297abf5a7541e616

General

Target

newfile26.xlsm
Size

55KB
MD5

fdd4a9c584623083903c0d32c942a784
SHA1

099eb8322a9711337a7dfa224b00a359a4a5aa85
SHA256

cb45fc44b2fe203c3825a5ed5342a82288e5517e5d5ed711297abf5a7541e616
SHA512

95fbf878898be7e0a7d8ff9e770f2086d65cc2dfe7f75427ddc12e2583a7719b32458d5eb0e2c6f2211c71bf04eeb62e85930b97c09ff095f52a1ba953facb65
SSDEEP

768:KtDd/fxWpt1J3S5f3v4Jfa3ODVs3KnooaRHIuZVvDb6fQl2baajQjFH:i5/fxWLC5/wJi3eVsdtLVvKIl2baaiH

Score

10^/10

bumblebee 0411r trojan

Malware Config

Extracted

Family

bumblebee

Botnet

0411r

C2

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	4880	4960	rundll32.exe	65

Downloads MZ/PE file

Loads dropped DLL 2 IoCs

pid	Process
4880	rundll32.exe
3656	rundll32.exe

Suspicious use of NtCreateThreadExHideFromDebugger 2 IoCs

pid	Process
4880	rundll32.exe
3656	rundll32.exe

Program crash 2 IoCs

pid	pid_target	Process	procid_target
4936	4880	WerFault.exe	69
4008	3656	WerFault.exe	78

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
4960	EXCEL.EXE

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
2356	powershell.exe
2356	powershell.exe
2356	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2356	powershell.exe

Suspicious use of SetWindowsHookEx 28 IoCs

pid	Process
4960	EXCEL.EXE
4960	EXCEL.EXE
4960	EXCEL.EXE
4960	EXCEL.EXE
4960	EXCEL.EXE
4960	EXCEL.EXE
4960	EXCEL.EXE
4960	EXCEL.EXE
4960	EXCEL.EXE
4960	EXCEL.EXE
4960	EXCEL.EXE
4960	EXCEL.EXE
4960	EXCEL.EXE
4960	EXCEL.EXE
4960	EXCEL.EXE
4960	EXCEL.EXE
4960	EXCEL.EXE
4960	EXCEL.EXE
4960	EXCEL.EXE
4960	EXCEL.EXE
4960	EXCEL.EXE
4960	EXCEL.EXE
4960	EXCEL.EXE
4960	EXCEL.EXE
4960	EXCEL.EXE
4960	EXCEL.EXE
4960	EXCEL.EXE
4960	EXCEL.EXE

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 4960 wrote to memory of 4880	4960	EXCEL.EXE	69
PID 4960 wrote to memory of 4880	4960	EXCEL.EXE	69
PID 4208 wrote to memory of 3656	4208	cmd.exe	78
PID 4208 wrote to memory of 3656	4208	cmd.exe	78

C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE
"C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE" "C:\Users\Admin\AppData\Local\Temp\newfile26.xlsm"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4960
- C:\Windows\SYSTEM32\rundll32.exe
  rundll32 name.dll,SendData
  2⤵
  - Process spawned unexpected child process
  - Loads dropped DLL
  - Suspicious use of NtCreateThreadExHideFromDebugger
  PID:4880
- - C:\Windows\system32\WerFault.exe
    C:\Windows\system32\WerFault.exe -u -p 4880 -s 388
    3⤵
    - Program crash
    PID:4936

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:2356

C:\Windows\system32\cmd.exe
"C:\Windows\system32\cmd.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:4208
- C:\Windows\system32\rundll32.exe
  rundll32 name.dll,SendData
  2⤵
  - Loads dropped DLL
  - Suspicious use of NtCreateThreadExHideFromDebugger
  PID:3656
- - C:\Windows\system32\WerFault.exe
    C:\Windows\system32\WerFault.exe -u -p 3656 -s 388
    3⤵
    - Program crash
    PID:4008

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

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

Filesize
996KB

MD5
29dc5554a958d16358c38ff8c2d6e968

SHA1
7c7bfbb0d1c9c5f43f6510d0933bd866f68f369b

SHA256
0260a3ed2496aaa24fb2703b57a5155360ea4471af362402732aa7cacdb8ee4c

SHA512
7adcb119a2c20ba95fa9a7a6fd73d77e9de834c8516504a0e7b7ba8b53d75d00bd6b4428a4faab9c9f5087dbab41b25cd109586bf46f71655ab9f88c01f1590d

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

Filesize
996KB

MD5
29dc5554a958d16358c38ff8c2d6e968

SHA1
7c7bfbb0d1c9c5f43f6510d0933bd866f68f369b

SHA256
0260a3ed2496aaa24fb2703b57a5155360ea4471af362402732aa7cacdb8ee4c

SHA512
7adcb119a2c20ba95fa9a7a6fd73d77e9de834c8516504a0e7b7ba8b53d75d00bd6b4428a4faab9c9f5087dbab41b25cd109586bf46f71655ab9f88c01f1590d

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

Filesize
996KB

MD5
29dc5554a958d16358c38ff8c2d6e968

SHA1
7c7bfbb0d1c9c5f43f6510d0933bd866f68f369b

SHA256
0260a3ed2496aaa24fb2703b57a5155360ea4471af362402732aa7cacdb8ee4c

SHA512
7adcb119a2c20ba95fa9a7a6fd73d77e9de834c8516504a0e7b7ba8b53d75d00bd6b4428a4faab9c9f5087dbab41b25cd109586bf46f71655ab9f88c01f1590d

Download Submit
memory/2356-315-0x000001ECE68D0000-0x000001ECE690C000-memory.dmp

Filesize
240KB

Download
memory/2356-296-0x000001ECE6330000-0x000001ECE6352000-memory.dmp

Filesize
136KB

Download
memory/2356-326-0x000001ECE6990000-0x000001ECE6A06000-memory.dmp

Filesize
472KB

Download
memory/3656-355-0x0000020342FC0000-0x0000020343036000-memory.dmp

Filesize
472KB

Download
memory/3656-354-0x0000020343180000-0x00000203432C9000-memory.dmp

Filesize
1.3MB

Download
memory/4880-287-0x000001E98F860000-0x000001E98F8D6000-memory.dmp

Filesize
472KB

Download
memory/4880-286-0x000001E98FAF0000-0x000001E98FC39000-memory.dmp

Filesize
1.3MB

Download
memory/4960-132-0x00007FFBEB590000-0x00007FFBEB5A0000-memory.dmp

Filesize
64KB

Download
memory/4960-120-0x00007FFBEE9B0000-0x00007FFBEE9C0000-memory.dmp

Filesize
64KB

Download
memory/4960-122-0x00007FFBEE9B0000-0x00007FFBEE9C0000-memory.dmp

Filesize
64KB

Download
memory/4960-123-0x00007FFBEE9B0000-0x00007FFBEE9C0000-memory.dmp

Filesize
64KB

Download
memory/4960-121-0x00007FFBEE9B0000-0x00007FFBEE9C0000-memory.dmp

Filesize
64KB

Download
memory/4960-133-0x00007FFBEB590000-0x00007FFBEB5A0000-memory.dmp

Filesize
64KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads