681415bec47952960626cc90f36aae28fe01283c16cdcf187ba5c331d170facc

General

Target
0b05d440d03b784560c936d2cf93a033.xls
Size 113KB
Sample220111-s2ggsagba7
SHA256 681415bec47952960626cc90f36aae28fe01283c16cdcf187ba5c331d170facc
MD5 0b05d440d03b784560c936d2cf93a033
SHA1 30cd168113c45712f8b2786e10142a06cac7dc4d
SHA512 ba341cd9c6f30790e41bf807b7004542dedc9396437acc113a0e6863c3c432ccebf393c98c19db9e8f5014de701b05822d0b97af368564cd86523d431f321edd
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	2444	2696	rundll32.exe	67

Blocklisted process makes network request 2 IoCs

flow	pid	Process
34	3128	rundll32.exe
35	3128	rundll32.exe

Downloads MZ/PE file

Loads dropped DLL 2 IoCs

pid	Process
2444	rundll32.exe
3392	rundll32.exe

Drops file in System32 directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\Muvdnuojhphkp\qlmjlud.znh	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
2696	EXCEL.EXE

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
3128	rundll32.exe
3128	rundll32.exe

Suspicious use of SetWindowsHookEx 12 IoCs

pid	Process
2696	EXCEL.EXE
2696	EXCEL.EXE
2696	EXCEL.EXE
2696	EXCEL.EXE
2696	EXCEL.EXE
2696	EXCEL.EXE
2696	EXCEL.EXE
2696	EXCEL.EXE
2696	EXCEL.EXE
2696	EXCEL.EXE
2696	EXCEL.EXE
2696	EXCEL.EXE

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 2696 wrote to memory of 2444	2696	EXCEL.EXE	70
PID 2696 wrote to memory of 2444	2696	EXCEL.EXE	70
PID 2696 wrote to memory of 2444	2696	EXCEL.EXE	70
PID 2444 wrote to memory of 3392	2444	rundll32.exe	71
PID 2444 wrote to memory of 3392	2444	rundll32.exe	71
PID 2444 wrote to memory of 3392	2444	rundll32.exe	71
PID 3392 wrote to memory of 992	3392	rundll32.exe	72
PID 3392 wrote to memory of 992	3392	rundll32.exe	72
PID 3392 wrote to memory of 992	3392	rundll32.exe	72
PID 992 wrote to memory of 3128	992	rundll32.exe	73
PID 992 wrote to memory of 3128	992	rundll32.exe	73
PID 992 wrote to memory of 3128	992	rundll32.exe	73

C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE
"C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE" "C:\Users\Admin\AppData\Local\Temp\0b05d440d03b784560c936d2cf93a033.xls"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2696
- 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:2444
- - 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:3392
  - - C:\Windows\SysWOW64\rundll32.exe
      C:\Windows\SysWOW64\rundll32.exe "C:\Windows\SysWOW64\Muvdnuojhphkp\qlmjlud.znh",EoGFF
      4⤵
      Suspicious use of WriteProcessMemory
      PID:992
    - - C:\Windows\SysWOW64\rundll32.exe
        
        C:\Windows\SysWOW64\rundll32.exe "C:\Windows\System32\Muvdnuojhphkp\qlmjlud.znh",DllRegisterServer
        5⤵
        Blocklisted process makes network request
        Suspicious behavior: EnumeratesProcesses
        
        PID:3128

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/2696-118-0x00007FFD72FE0000-0x00007FFD72FF0000-memory.dmp

Download

memory/2696-121-0x0000019476E70000-0x0000019476E72000-memory.dmp

Download

memory/2696-122-0x0000019476E70000-0x0000019476E72000-memory.dmp

Download

memory/2696-120-0x0000019476E70000-0x0000019476E72000-memory.dmp

Download

memory/2696-119-0x00007FFD72FE0000-0x00007FFD72FF0000-memory.dmp

Download

memory/2696-115-0x00007FFD72FE0000-0x00007FFD72FF0000-memory.dmp

Download

memory/2696-117-0x00007FFD72FE0000-0x00007FFD72FF0000-memory.dmp

Download

memory/2696-116-0x00007FFD72FE0000-0x00007FFD72FF0000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads