edb7ef5d016fbb9228f1c0d5a3f3088990dc3d55acfdcbc6e4ed7cc97ead62c2

General

Target
SecuriteInfo.com.Heur.20045.25227.xlsm
Size 83KB
Sample220112-chabcsafa9
SHA256 edb7ef5d016fbb9228f1c0d5a3f3088990dc3d55acfdcbc6e4ed7cc97ead62c2
MD5 1677d09c0f2ca6a4d9b21aeba3cf7367
SHA1 4f78a36e89939b2bdf4667efda64698d8b991480
SHA512 76da2cfc70145930a8d2b144972a9b8bff0fc744bc27f5a8fef9050426d9be843279360979a28e729a852f53c6f4bd79de410102974dceeb8006ff28c8ffad88
MD5 SHA1 SHA512

Score

10^/10

Malware Config

Extracted

Language

xlm4.0

Source

URLs

xlm40.dropper
http://www.be-pu.com/4.hana/Y1XWpb1zWMRD/

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	3680	3052	rundll32.exe	68

Blocklisted process makes network request 1 IoCs

flow	pid	Process
43	3840	rundll32.exe

Downloads MZ/PE file

Loads dropped DLL 2 IoCs

pid	Process
3680	rundll32.exe
2984	rundll32.exe

Drops file in System32 directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\Agxwdpywbeutguen\cbrcke.pja	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 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
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0	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
3052	EXCEL.EXE

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
3840	rundll32.exe
3840	rundll32.exe

Suspicious use of SetWindowsHookEx 12 IoCs

pid	Process
3052	EXCEL.EXE
3052	EXCEL.EXE
3052	EXCEL.EXE
3052	EXCEL.EXE
3052	EXCEL.EXE
3052	EXCEL.EXE
3052	EXCEL.EXE
3052	EXCEL.EXE
3052	EXCEL.EXE
3052	EXCEL.EXE
3052	EXCEL.EXE
3052	EXCEL.EXE

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 3052 wrote to memory of 3680	3052	EXCEL.EXE	72
PID 3052 wrote to memory of 3680	3052	EXCEL.EXE	72
PID 3052 wrote to memory of 3680	3052	EXCEL.EXE	72
PID 3680 wrote to memory of 2984	3680	rundll32.exe	73
PID 3680 wrote to memory of 2984	3680	rundll32.exe	73
PID 3680 wrote to memory of 2984	3680	rundll32.exe	73
PID 2984 wrote to memory of 2052	2984	rundll32.exe	74
PID 2984 wrote to memory of 2052	2984	rundll32.exe	74
PID 2984 wrote to memory of 2052	2984	rundll32.exe	74
PID 2052 wrote to memory of 3840	2052	rundll32.exe	75
PID 2052 wrote to memory of 3840	2052	rundll32.exe	75
PID 2052 wrote to memory of 3840	2052	rundll32.exe	75

C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE
"C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE" "C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.Heur.20045.25227.xlsm"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3052
- C:\Windows\SysWow64\rundll32.exe
  C:\Windows\SysWow64\rundll32.exe ..\adi.ocx,D"&"l"&"lR"&"egister"&"Serve"&"r
  2⤵
  - Process spawned unexpected child process
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:3680
- - C:\Windows\SysWOW64\rundll32.exe
    C:\Windows\SysWOW64\rundll32.exe "C:\Users\Admin\adi.ocx",DllRegisterServer
    3⤵
    - Loads dropped DLL
    - Drops file in System32 directory
    - Suspicious use of WriteProcessMemory
    PID:2984
  - - C:\Windows\SysWOW64\rundll32.exe
      C:\Windows\SysWOW64\rundll32.exe "C:\Windows\SysWOW64\Agxwdpywbeutguen\cbrcke.pja",TvUSRgQRaixHsF
      4⤵
      Suspicious use of WriteProcessMemory
      PID:2052
    - - C:\Windows\SysWOW64\rundll32.exe
        
        C:\Windows\SysWOW64\rundll32.exe "C:\Windows\System32\Agxwdpywbeutguen\cbrcke.pja",DllRegisterServer
        5⤵
        Blocklisted process makes network request
        Suspicious behavior: EnumeratesProcesses
        
        PID:3840

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/3052-120-0x0000028FEE210000-0x0000028FEE212000-memory.dmp

Download

memory/3052-121-0x00007FFEF3A30000-0x00007FFEF3A40000-memory.dmp

Download

memory/3052-122-0x0000028FEE210000-0x0000028FEE212000-memory.dmp

Download

memory/3052-128-0x00007FFEEFFC0000-0x00007FFEEFFD0000-memory.dmp

Download

memory/3052-129-0x00007FFEEFFC0000-0x00007FFEEFFD0000-memory.dmp

Download

memory/3052-119-0x0000028FEE210000-0x0000028FEE212000-memory.dmp

Download

memory/3052-115-0x00007FFEF3A30000-0x00007FFEF3A40000-memory.dmp

Download

memory/3052-118-0x00007FFEF3A30000-0x00007FFEF3A40000-memory.dmp

Download

memory/3052-117-0x00007FFEF3A30000-0x00007FFEF3A40000-memory.dmp

Download

memory/3052-116-0x00007FFEF3A30000-0x00007FFEF3A40000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads