e58cd1fc646d37b9fd8040d9f7f4110bb07cbdadb1f5dd4a55413acacd33807d

General

Target
0f2bd22e41ca408211f2fcfbf4d05645.xls
Size 118KB
Sample220112-eshrlabae6
SHA256 e58cd1fc646d37b9fd8040d9f7f4110bb07cbdadb1f5dd4a55413acacd33807d
MD5 0f2bd22e41ca408211f2fcfbf4d05645
SHA1 e396920d9f3ddaa9c1c25325794dc1cc9d5d860f
SHA512 75de138b42573b73253ca721cc2727ffcf0e0ce4336866e8e952380b3749ec7064a65ae6984ecd0f3d00e8784f40a2e00fe00fd18b78a60b4b54e888aacdd3fb
MD5 SHA1 SHA512

Score

10^/10

Malware Config

Extracted

Language

xlm4.0

Source

URLs

xlm40.dropper
http://www.cuneytkocas.com/wp-content/VSnofpES1wO2CcVob/
xlm40.dropper
http://towardsun.net/admin/BYGGkrYAnT/

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	4836	344	rundll32.exe	67

Blocklisted process makes network request 2 IoCs

flow	pid	Process
41	4848	rundll32.exe
47	4848	rundll32.exe

Downloads MZ/PE file

Loads dropped DLL 2 IoCs

pid	Process
4836	rundll32.exe
4872	rundll32.exe

Drops file in System32 directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\Uijptwbkpmkz\kjsdzqaszskmbn.slr	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\ProcessorNameString	EXCEL.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
344	EXCEL.EXE

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4848	rundll32.exe
4848	rundll32.exe

Suspicious use of SetWindowsHookEx 12 IoCs

pid	Process
344	EXCEL.EXE
344	EXCEL.EXE
344	EXCEL.EXE
344	EXCEL.EXE
344	EXCEL.EXE
344	EXCEL.EXE
344	EXCEL.EXE
344	EXCEL.EXE
344	EXCEL.EXE
344	EXCEL.EXE
344	EXCEL.EXE
344	EXCEL.EXE

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 344 wrote to memory of 4836	344	EXCEL.EXE	71
PID 344 wrote to memory of 4836	344	EXCEL.EXE	71
PID 344 wrote to memory of 4836	344	EXCEL.EXE	71
PID 4836 wrote to memory of 4872	4836	rundll32.exe	72
PID 4836 wrote to memory of 4872	4836	rundll32.exe	72
PID 4836 wrote to memory of 4872	4836	rundll32.exe	72
PID 4872 wrote to memory of 4864	4872	rundll32.exe	73
PID 4872 wrote to memory of 4864	4872	rundll32.exe	73
PID 4872 wrote to memory of 4864	4872	rundll32.exe	73
PID 4864 wrote to memory of 4848	4864	rundll32.exe	74
PID 4864 wrote to memory of 4848	4864	rundll32.exe	74
PID 4864 wrote to memory of 4848	4864	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\0f2bd22e41ca408211f2fcfbf4d05645.xls"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:344
- 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:4836
- - 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:4872
  - - C:\Windows\SysWOW64\rundll32.exe
      C:\Windows\SysWOW64\rundll32.exe "C:\Windows\SysWOW64\Uijptwbkpmkz\kjsdzqaszskmbn.slr",kSOQmjmwTPY
      4⤵
      Suspicious use of WriteProcessMemory
      PID:4864
    - - C:\Windows\SysWOW64\rundll32.exe
        
        C:\Windows\SysWOW64\rundll32.exe "C:\Windows\System32\Uijptwbkpmkz\kjsdzqaszskmbn.slr",DllRegisterServer
        5⤵
        Blocklisted process makes network request
        Suspicious behavior: EnumeratesProcesses
        
        PID:4848

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/344-118-0x00007FF836310000-0x00007FF836320000-memory.dmp

Download

memory/344-119-0x0000021949E20000-0x0000021949E22000-memory.dmp

Download

memory/344-120-0x0000021949E20000-0x0000021949E22000-memory.dmp

Download

memory/344-121-0x00007FF836310000-0x00007FF836320000-memory.dmp

Download

memory/344-122-0x0000021949E20000-0x0000021949E22000-memory.dmp

Download

memory/344-115-0x00007FF836310000-0x00007FF836320000-memory.dmp

Download

memory/344-117-0x00007FF836310000-0x00007FF836320000-memory.dmp

Download

memory/344-116-0x00007FF836310000-0x00007FF836320000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads