5471bc0d0b81c3ee5e169546f5eb63613253af486bc28e14da70e43ba2acbdf7

General

Target
SecuriteInfo.com.Exploit.Siggen3.24636.18577.13265.xls
Size 113KB
Sample220111-tfm8wagbe9
SHA256 5471bc0d0b81c3ee5e169546f5eb63613253af486bc28e14da70e43ba2acbdf7
MD5 bd2d05e48abaa25bc165950b2411eb0f
SHA1 59f7eac8fe1ffd18fa7866fdd2f4530ab8a4a0e2
SHA512 ae8285927907278f6a8be109b25a16912bbd67ec468c374f88138ab7be978684161e729ac9c6b32885f2f81054378e35551cadf50963dc6095a960bccdc6908a
MD5 SHA1 SHA512

Score

10^/10

Malware Config

Extracted

Language

xlm4.0

Source

URLs

xlm40.dropper
http://gaidov.bg/wp-includes/Ug/

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	4028	3376	rundll32.exe	67

Blocklisted process makes network request 2 IoCs

flow	pid	Process
47	4916	rundll32.exe
49	4916	rundll32.exe

Downloads MZ/PE file

Loads dropped DLL 2 IoCs

pid	Process
4028	rundll32.exe
2356	rundll32.exe

Drops file in System32 directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\Xdmolblmpatdvqli\hkyfk.yrb	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
3376	EXCEL.EXE

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4916	rundll32.exe
4916	rundll32.exe

Suspicious use of SetWindowsHookEx 12 IoCs

pid	Process
3376	EXCEL.EXE
3376	EXCEL.EXE
3376	EXCEL.EXE
3376	EXCEL.EXE
3376	EXCEL.EXE
3376	EXCEL.EXE
3376	EXCEL.EXE
3376	EXCEL.EXE
3376	EXCEL.EXE
3376	EXCEL.EXE
3376	EXCEL.EXE
3376	EXCEL.EXE

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 3376 wrote to memory of 4028	3376	EXCEL.EXE	70
PID 3376 wrote to memory of 4028	3376	EXCEL.EXE	70
PID 3376 wrote to memory of 4028	3376	EXCEL.EXE	70
PID 4028 wrote to memory of 2356	4028	rundll32.exe	72
PID 4028 wrote to memory of 2356	4028	rundll32.exe	72
PID 4028 wrote to memory of 2356	4028	rundll32.exe	72
PID 2356 wrote to memory of 3592	2356	rundll32.exe	73
PID 2356 wrote to memory of 3592	2356	rundll32.exe	73
PID 2356 wrote to memory of 3592	2356	rundll32.exe	73
PID 3592 wrote to memory of 4916	3592	rundll32.exe	74
PID 3592 wrote to memory of 4916	3592	rundll32.exe	74
PID 3592 wrote to memory of 4916	3592	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\SecuriteInfo.com.Exploit.Siggen3.24636.18577.13265.xls"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3376
- 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:4028
- - 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:2356
  - - C:\Windows\SysWOW64\rundll32.exe
      C:\Windows\SysWOW64\rundll32.exe "C:\Windows\SysWOW64\Xdmolblmpatdvqli\hkyfk.yrb",OEOA
      4⤵
      Suspicious use of WriteProcessMemory
      PID:3592
    - - C:\Windows\SysWOW64\rundll32.exe
        
        C:\Windows\SysWOW64\rundll32.exe "C:\Windows\System32\Xdmolblmpatdvqli\hkyfk.yrb",DllRegisterServer
        5⤵
        Blocklisted process makes network request
        Suspicious behavior: EnumeratesProcesses
        
        PID:4916

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/3376-118-0x00007FFBCE9E0000-0x00007FFBCE9F0000-memory.dmp

Download

memory/3376-120-0x00000212DCD50000-0x00000212DCD52000-memory.dmp

Download

memory/3376-121-0x00007FFBCE9E0000-0x00007FFBCE9F0000-memory.dmp

Download

memory/3376-122-0x00000212DCD50000-0x00000212DCD52000-memory.dmp

Download

memory/3376-119-0x00000212DCD50000-0x00000212DCD52000-memory.dmp

Download

memory/3376-115-0x00007FFBCE9E0000-0x00007FFBCE9F0000-memory.dmp

Download

memory/3376-117-0x00007FFBCE9E0000-0x00007FFBCE9F0000-memory.dmp

Download

memory/3376-116-0x00007FFBCE9E0000-0x00007FFBCE9F0000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads