c415f6432a14864da8d7cd66dab9263599364b3b1d8b3fd13e4c725d1a0c4562

General

Target
e0b77c94246a20ec8d2a633c5aa226e2.xls
Size 113KB
Sample220111-ynp5nahcdm
SHA256 c415f6432a14864da8d7cd66dab9263599364b3b1d8b3fd13e4c725d1a0c4562
MD5 e0b77c94246a20ec8d2a633c5aa226e2
SHA1 3bce907c9316aff89b1fcc9364a639ed9bc6c351
SHA512 5bda064cf282d3732ab8482f443392b73b64cb8ef90108cdaf758b2b8bb5507b9c707c721e677d843d351f5bf61f019b924da183032b206f93cea277743287c1
MD5 SHA1 SHA512

Score

10^/10

suricata

Malware Config

Extracted

Language

xlm4.0

Source

URLs

xlm40.dropper
http://gaidov.bg/wp-includes/Ug/
xlm40.dropper
http://studiokrishnaproduction.com/wp-includes/3mJ/

Signatures

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	2508	3708	rundll32.exe	67

suricata: ET MALWARE W32/Emotet CnC Beacon 3
suricata: ET MALWARE W32/Emotet CnC Beacon 3
suricata

Blocklisted process makes network request 2 IoCs

flow	pid	Process
48	4900	rundll32.exe
49	4900	rundll32.exe

Downloads MZ/PE file

Loads dropped DLL 2 IoCs

pid	Process
2508	rundll32.exe
1352	rundll32.exe

Drops file in System32 directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\Bvhwpzhpnsap\lnwnbd.juk	rundll32.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

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
3708	EXCEL.EXE

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4900	rundll32.exe
4900	rundll32.exe

Suspicious use of SetWindowsHookEx 12 IoCs

pid	Process
3708	EXCEL.EXE
3708	EXCEL.EXE
3708	EXCEL.EXE
3708	EXCEL.EXE
3708	EXCEL.EXE
3708	EXCEL.EXE
3708	EXCEL.EXE
3708	EXCEL.EXE
3708	EXCEL.EXE
3708	EXCEL.EXE
3708	EXCEL.EXE
3708	EXCEL.EXE

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 3708 wrote to memory of 2508	3708	EXCEL.EXE	71
PID 3708 wrote to memory of 2508	3708	EXCEL.EXE	71
PID 3708 wrote to memory of 2508	3708	EXCEL.EXE	71
PID 2508 wrote to memory of 1352	2508	rundll32.exe	72
PID 2508 wrote to memory of 1352	2508	rundll32.exe	72
PID 2508 wrote to memory of 1352	2508	rundll32.exe	72
PID 1352 wrote to memory of 3540	1352	rundll32.exe	73
PID 1352 wrote to memory of 3540	1352	rundll32.exe	73
PID 1352 wrote to memory of 3540	1352	rundll32.exe	73
PID 3540 wrote to memory of 4900	3540	rundll32.exe	74
PID 3540 wrote to memory of 4900	3540	rundll32.exe	74
PID 3540 wrote to memory of 4900	3540	rundll32.exe	74

C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE
"C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE" "C:\Users\Admin\AppData\Local\Temp\e0b77c94246a20ec8d2a633c5aa226e2.xls"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3708
- C:\Windows\SysWow64\rundll32.exe
  C:\Windows\SysWow64\rundll32.exe ..\sun.ocx,D"&"l"&"lR"&"egister"&"Serve"&"r
  2⤵
  - Process spawned unexpected child process
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:2508
- - C:\Windows\SysWOW64\rundll32.exe
    C:\Windows\SysWOW64\rundll32.exe "C:\Users\Admin\sun.ocx",DllRegisterServer
    3⤵
    - Loads dropped DLL
    - Drops file in System32 directory
    - Suspicious use of WriteProcessMemory
    PID:1352
  - - C:\Windows\SysWOW64\rundll32.exe
      C:\Windows\SysWOW64\rundll32.exe "C:\Windows\SysWOW64\Bvhwpzhpnsap\lnwnbd.juk",uQuKIAiecBFQ
      4⤵
      Suspicious use of WriteProcessMemory
      PID:3540
    - - C:\Windows\SysWOW64\rundll32.exe
        
        C:\Windows\SysWOW64\rundll32.exe "C:\Windows\System32\Bvhwpzhpnsap\lnwnbd.juk",DllRegisterServer
        5⤵
        Blocklisted process makes network request
        Suspicious behavior: EnumeratesProcesses
        
        PID:4900

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

3

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/3708-118-0x00007FFB3D3D0000-0x00007FFB3D3E0000-memory.dmp

Download

memory/3708-122-0x00000170A1C30000-0x00000170A1C32000-memory.dmp

Download

memory/3708-121-0x00007FFB3D3D0000-0x00007FFB3D3E0000-memory.dmp

Download

memory/3708-120-0x00000170A1C30000-0x00000170A1C32000-memory.dmp

Download

memory/3708-119-0x00000170A1C30000-0x00000170A1C32000-memory.dmp

Download

memory/3708-115-0x00007FFB3D3D0000-0x00007FFB3D3E0000-memory.dmp

Download

memory/3708-117-0x00007FFB3D3D0000-0x00007FFB3D3E0000-memory.dmp

Download

memory/3708-116-0x00007FFB3D3D0000-0x00007FFB3D3E0000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads