1a243db583013a6999761dad88d6952351fdc2cd17d2016990276a9dd11ac90b

General

Target

nn30.xlsm
Size

83KB
MD5

9636f43534938f7dfa6f9662fca03ff8
SHA1

494885b3781fe4adab15e6738a99555a341b4b82
SHA256

1a243db583013a6999761dad88d6952351fdc2cd17d2016990276a9dd11ac90b
SHA512

e1e9e6832eb13fd3d6f22b22be0f3aeb41b662c4c217dd6f2a841b38b71d2c82cc14dbf97a3167c30be56e9838398870349e12196493a49ca21ab166fe1edd63

Score

10^/10

Malware Config

Extracted

Language

xlm4.0

Source

URLs

xlm40.dropper

https://zml.laneso.com/packet/AlvJ8OdtSYEeeCQP/

xlm40.dropper

http://ostadsarma.com/wp-admin/JNgASjNC/

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	496	2712	rundll32.exe	52

Blocklisted process makes network request 2 IoCs

flow	pid	Process
44	2488	rundll32.exe
45	2488	rundll32.exe

Downloads MZ/PE file

Loads dropped DLL 4 IoCs

pid	Process
496	rundll32.exe
4056	rundll32.exe
3504	rundll32.exe
2488	rundll32.exe

Drops file in System32 directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\Bbnyqwtgf\vxvmxxowqtbwh.lxg	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 5 IoCs

Processor 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\CentralProcessor\0\ProcessorNameString	EXCEL.EXE
Key opened	\Registry\Machine\HARDWARE\DESCRIPTION\System\CentralProcessor\0	MusNotification.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	MusNotification.exe
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	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
2712	EXCEL.EXE

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2488	rundll32.exe
2488	rundll32.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeShutdownPrivilege	1312	MusNotification.exe
Token: SeCreatePagefilePrivilege	1312	MusNotification.exe

Suspicious use of FindShellTrayWindow 2 IoCs

pid	Process
2712	EXCEL.EXE
2712	EXCEL.EXE

Suspicious use of SetWindowsHookEx 12 IoCs

pid	Process
2712	EXCEL.EXE
2712	EXCEL.EXE
2712	EXCEL.EXE
2712	EXCEL.EXE
2712	EXCEL.EXE
2712	EXCEL.EXE
2712	EXCEL.EXE
2712	EXCEL.EXE
2712	EXCEL.EXE
2712	EXCEL.EXE
2712	EXCEL.EXE
2712	EXCEL.EXE

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 2712 wrote to memory of 496	2712	EXCEL.EXE	55
PID 2712 wrote to memory of 496	2712	EXCEL.EXE	55
PID 2712 wrote to memory of 496	2712	EXCEL.EXE	55
PID 496 wrote to memory of 4056	496	rundll32.exe	56
PID 496 wrote to memory of 4056	496	rundll32.exe	56
PID 496 wrote to memory of 4056	496	rundll32.exe	56
PID 4056 wrote to memory of 3504	4056	rundll32.exe	57
PID 4056 wrote to memory of 3504	4056	rundll32.exe	57
PID 4056 wrote to memory of 3504	4056	rundll32.exe	57
PID 3504 wrote to memory of 2488	3504	rundll32.exe	58
PID 3504 wrote to memory of 2488	3504	rundll32.exe	58
PID 3504 wrote to memory of 2488	3504	rundll32.exe	58

C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE
"C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE" "C:\Users\Admin\AppData\Local\Temp\nn30.xlsm"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of FindShellTrayWindow
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2712
- C:\Windows\SysWow64\rundll32.exe
  C:\Windows\SysWow64\rundll32.exe ..\erum.ocx,D"&"l"&"lR"&"egister"&"Serve"&"r
  2⤵
  - Process spawned unexpected child process
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:496
- - C:\Windows\SysWOW64\rundll32.exe
    C:\Windows\SysWOW64\rundll32.exe "C:\Users\Admin\erum.ocx",DllRegisterServer
    3⤵
    - Loads dropped DLL
    - Drops file in System32 directory
    - Suspicious use of WriteProcessMemory
    PID:4056
  - - C:\Windows\SysWOW64\rundll32.exe
      C:\Windows\SysWOW64\rundll32.exe "C:\Windows\SysWOW64\Bbnyqwtgf\vxvmxxowqtbwh.lxg",cBlztdS
      4⤵
      Loads dropped DLL
      Suspicious use of WriteProcessMemory
      PID:3504
    - - C:\Windows\SysWOW64\rundll32.exe
        
        C:\Windows\SysWOW64\rundll32.exe "C:\Windows\System32\Bbnyqwtgf\vxvmxxowqtbwh.lxg",DllRegisterServer
        5⤵
        Blocklisted process makes network request
        Loads dropped DLL
        Suspicious behavior: EnumeratesProcesses
        
        PID:2488

C:\Windows\system32\MusNotification.exe
C:\Windows\system32\MusNotification.exe
1⤵
- Checks processor information in registry
- Suspicious use of AdjustPrivilegeToken
PID:1312

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

Replay Monitor

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Downloads

memory/496-148-0x0000000004065000-0x0000000004066000-memory.dmp

Filesize
4KB

Download
memory/496-147-0x0000000004041000-0x0000000004065000-memory.dmp

Filesize
144KB

Download
memory/2488-182-0x00000000051C1000-0x00000000051E5000-memory.dmp

Filesize
144KB

Download
memory/2488-176-0x0000000003061000-0x0000000003085000-memory.dmp

Filesize
144KB

Download
memory/2488-178-0x0000000005081000-0x00000000050A5000-memory.dmp

Filesize
144KB

Download
memory/2488-180-0x0000000005161000-0x0000000005185000-memory.dmp

Filesize
144KB

Download
memory/2488-184-0x00000000052A1000-0x00000000052C5000-memory.dmp

Filesize
144KB

Download
memory/2488-186-0x00000000055B1000-0x00000000055D5000-memory.dmp

Filesize
144KB

Download
memory/2712-152-0x000001B062D50000-0x000001B062D52000-memory.dmp

Filesize
8KB

Download
memory/2712-138-0x000001B062D50000-0x000001B062D52000-memory.dmp

Filesize
8KB

Download
memory/2712-140-0x000001B062D50000-0x000001B062D52000-memory.dmp

Filesize
8KB

Download
memory/2712-142-0x000001B062D50000-0x000001B062D52000-memory.dmp

Filesize
8KB

Download
memory/2712-131-0x00007FFCE5130000-0x00007FFCE5140000-memory.dmp

Filesize
64KB

Download
memory/2712-141-0x000001B062D50000-0x000001B062D52000-memory.dmp

Filesize
8KB

Download
memory/2712-151-0x000001B062D50000-0x000001B062D52000-memory.dmp

Filesize
8KB

Download
memory/2712-130-0x00007FFCE5130000-0x00007FFCE5140000-memory.dmp

Filesize
64KB

Download
memory/2712-153-0x000001B062D50000-0x000001B062D52000-memory.dmp

Filesize
8KB

Download
memory/2712-155-0x000001B062D50000-0x000001B062D52000-memory.dmp

Filesize
8KB

Download
memory/2712-154-0x000001B062D50000-0x000001B062D52000-memory.dmp

Filesize
8KB

Download
memory/2712-132-0x00007FFCE5130000-0x00007FFCE5140000-memory.dmp

Filesize
64KB

Download
memory/2712-158-0x000001B062D50000-0x000001B062D52000-memory.dmp

Filesize
8KB

Download
memory/2712-159-0x000001B062D50000-0x000001B062D52000-memory.dmp

Filesize
8KB

Download
memory/2712-133-0x00007FFCE5130000-0x00007FFCE5140000-memory.dmp

Filesize
64KB

Download
memory/2712-134-0x00007FFCE5130000-0x00007FFCE5140000-memory.dmp

Filesize
64KB

Download
memory/2712-135-0x000001B062D50000-0x000001B062D52000-memory.dmp

Filesize
8KB

Download
memory/2712-136-0x000001B062D50000-0x000001B062D52000-memory.dmp

Filesize
8KB

Download
memory/2712-137-0x000001B062D50000-0x000001B062D52000-memory.dmp

Filesize
8KB

Download
memory/2712-139-0x000001B062D50000-0x000001B062D52000-memory.dmp

Filesize
8KB

Download
memory/2712-143-0x000001B062D50000-0x000001B062D52000-memory.dmp

Filesize
8KB

Download
memory/3504-172-0x0000000004D11000-0x0000000004D35000-memory.dmp

Filesize
144KB

Download
memory/4056-170-0x00000000051B1000-0x00000000051D5000-memory.dmp

Filesize
144KB

Download
memory/4056-166-0x0000000004E31000-0x0000000004E55000-memory.dmp

Filesize
144KB

Download
memory/4056-164-0x0000000004DD1000-0x0000000004DF5000-memory.dmp

Filesize
144KB

Download
memory/4056-162-0x0000000004CC1000-0x0000000004CE5000-memory.dmp

Filesize
144KB

Download
memory/4056-160-0x0000000004BD1000-0x0000000004BF5000-memory.dmp

Filesize
144KB

Download
memory/4056-156-0x0000000004611000-0x0000000004635000-memory.dmp

Filesize
144KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads