locky | 0537fa38b88755f39df1cd774b907ec759dacab2388dc0109f4db9f0e9d191a0

General

Target

Locky.exe
Size

180KB
MD5

b06d9dd17c69ed2ae75d9e40b2631b42
SHA1

b606aaa402bfe4a15ef80165e964d384f25564e4
SHA256

bc98c8b22461a2c2631b2feec399208fdc4ecd1cd2229066c2f385caa958daa3
SHA512

8e54aca4feb51611142c1f2bf303200113604013c2603eea22d72d00297cb1cb40a2ef11f5129989cd14f90e495db79bffd15bd6282ff564c4af7975b1610c1c
SSDEEP

3072:gzWgfLlUc7CIJ1tkZaQyjhOosc8MKi6KDXnLCtyAR0u1cZ86:gdLl4wkZa/UDiD7ukst1H6

Score

10^/10

locky discovery ransomware

Malware Config

Signatures

Locky
Ransomware strain released in 2016, with advanced features like anti-analysis.
ransomware locky
Drops file in Windows directory 1 IoCs

Processes:

WINWORD.EXE

description ioc process

File opened for modification C:\Windows\Debug\WIA\wiatrace.log WINWORD.EXE
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

description	ioc	process
File opened for modification	C:\Windows\Debug\WIA\wiatrace.log	WINWORD.EXE

System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

Processes:

WINWORD.EXELocky.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	WINWORD.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Locky.exe

Office loads VBA resources, possible macro or embedded object present
Modifies registry class 1 IoCs

Processes:

rundll32.exe

description ioc process

Key created \REGISTRY\USER\S-1-5-21-312935884-697965778-3955649944-1000_Classes\Local Settings rundll32.exe
Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

WINWORD.EXE

pid process

2860 WINWORD.EXE
Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

rundll32.exe

pid process

2376 rundll32.exe
Suspicious use of FindShellTrayWindow 1 IoCs

Processes:

WINWORD.EXE

pid process

2860 WINWORD.EXE
Suspicious use of SetWindowsHookEx 2 IoCs

Processes:

WINWORD.EXE

pid process

2860 WINWORD.EXE
2860 WINWORD.EXE

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-312935884-697965778-3955649944-1000_Classes\Local Settings	rundll32.exe

pid	process
2860	WINWORD.EXE

pid	process
2376	rundll32.exe

pid	process
2860	WINWORD.EXE

pid	process
2860	WINWORD.EXE
2860	WINWORD.EXE

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

WINWORD.EXE

description	pid	process	target process
PID 2860 wrote to memory of 3048	2860	WINWORD.EXE	splwow64.exe
PID 2860 wrote to memory of 3048	2860	WINWORD.EXE	splwow64.exe
PID 2860 wrote to memory of 3048	2860	WINWORD.EXE	splwow64.exe
PID 2860 wrote to memory of 3048	2860	WINWORD.EXE	splwow64.exe

C:\Users\Admin\AppData\Local\Temp\Locky.exe
"C:\Users\Admin\AppData\Local\Temp\Locky.exe"
1⤵
- System Location Discovery: System Language Discovery
PID:2688

C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE
"C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE" /n "C:\Users\Admin\Desktop\StepInvoke.docx"
1⤵
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of FindShellTrayWindow
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2860

C:\Windows\splwow64.exe
C:\Windows\splwow64.exe 12288
2⤵
PID:3048

C:\Windows\system32\rundll32.exe
"C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\Desktop\ExitGrant.svgz
1⤵
- Modifies registry class
- Suspicious behavior: GetForegroundWindowSpam
PID:2376

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Roaming\Microsoft\UProof\ExcludeDictionaryEN0409.lex
Filesize
2B

MD5
f3b25701fe362ec84616a93a45ce9998

SHA1
d62636d8caec13f04e28442a0a6fa1afeb024bbb

SHA256
b3d510ef04275ca8e698e5b3cbb0ece3949ef9252f0cdc839e9ee347409a2209

SHA512
98c5f56f3de340690c139e58eb7dac111979f0d4dffe9c4b24ff849510f4b6ffa9fd608c0a3de9ac3c9fd2190f0efaf715309061490f9755a9bfdf1c54ca0d84

Download Submit
memory/2688-28-0x0000000000400000-0x00000000007D1000-memory.dmp

Filesize
3.8MB

Download
memory/2688-26-0x0000000000400000-0x00000000007D1000-memory.dmp

Filesize
3.8MB

Download
memory/2688-39-0x0000000000400000-0x00000000007D1000-memory.dmp

Filesize
3.8MB

Download
memory/2688-37-0x0000000000400000-0x00000000007D1000-memory.dmp

Filesize
3.8MB

Download
memory/2688-17-0x0000000000400000-0x00000000007D1000-memory.dmp

Filesize
3.8MB

Download
memory/2688-1-0x0000000000220000-0x0000000000224000-memory.dmp

Filesize
16KB

Download
memory/2688-36-0x0000000000400000-0x00000000007D1000-memory.dmp

Filesize
3.8MB

Download
memory/2688-33-0x0000000000400000-0x00000000007D1000-memory.dmp

Filesize
3.8MB

Download
memory/2688-0-0x0000000000220000-0x0000000000224000-memory.dmp

Filesize
16KB

Download
memory/2688-30-0x0000000000400000-0x00000000007D1000-memory.dmp

Filesize
3.8MB

Download
memory/2860-2-0x000000002F4E1000-0x000000002F4E2000-memory.dmp

Filesize
4KB

Download
memory/2860-25-0x0000000070D8D000-0x0000000070D98000-memory.dmp

Filesize
44KB

Download
memory/2860-4-0x0000000070D8D000-0x0000000070D98000-memory.dmp

Filesize
44KB

Download
memory/2860-3-0x000000005FFF0000-0x0000000060000000-memory.dmp

Filesize
64KB

Download

Analysis

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