locky | c4370948896e4b1d2fded7d0a85127f5c2e1564e41ecbc47c810ae76b1473ac4

General

Target

20161205_3f1d7664595d2ff885b9fa3bf8a96bbf.js
Size

13KB
MD5

181a0ef665583fb02134e9effa90f86f
SHA1

815bd5e80fb2ba833514548c70a5e35014a993b1
SHA256

c4370948896e4b1d2fded7d0a85127f5c2e1564e41ecbc47c810ae76b1473ac4
SHA512

650b1f77700ea60e0c8bfca25b364a35722a1f6b26ed2358d553adb0ae100ececffb11fa1af873ecf2318e3002e115fb2ce5d7b98f5e16c6428baae18e2d0a10

Score

10^/10

locky locky_osiris ransomware suricata

Malware Config

Signatures

Locky
Ransomware strain released in 2016, with advanced features like anti-analysis.
ransomware locky
Locky (Osiris variant)
Variant of the Locky ransomware seen in the wild since early 2017.
ransomware locky_osiris
suricata: ET MALWARE Nemucod JS Downloader Aug 01 2017
suricata: ET MALWARE Nemucod JS Downloader Aug 01 2017
suricata

Blocklisted process makes network request 9 IoCs

Processes:

wscript.exerundll32.exe

flow	pid	process
5	1048	wscript.exe
7	1048	wscript.exe
9	1048	wscript.exe
11	1048	wscript.exe
12	1028	rundll32.exe
15	1028	rundll32.exe
16	1028	rundll32.exe
17	1028	rundll32.exe
18	1028	rundll32.exe

Modifies extensions of user files 2 IoCs

Ransomware generally changes the extension on encrypted files.

ransomware

Processes:

rundll32.exe

description	ioc	process
File opened for modification	\??\c:\Users\Admin\Pictures\SplitSkip.tiff	rundll32.exe
File opened for modification	\??\c:\Users\Admin\Pictures\MergeExpand.tiff	rundll32.exe

Loads dropped DLL 1 IoCs

Processes:

rundll32.exe

pid process

1028 rundll32.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

pid	process
1028	rundll32.exe

Suspicious use of WriteProcessMemory 10 IoCs

Processes:

wscript.exerundll32.exe

description	pid	process	target process
PID 1048 wrote to memory of 1676	1048	wscript.exe	rundll32.exe
PID 1048 wrote to memory of 1676	1048	wscript.exe	rundll32.exe
PID 1048 wrote to memory of 1676	1048	wscript.exe	rundll32.exe
PID 1676 wrote to memory of 1028	1676	rundll32.exe	rundll32.exe
PID 1676 wrote to memory of 1028	1676	rundll32.exe	rundll32.exe
PID 1676 wrote to memory of 1028	1676	rundll32.exe	rundll32.exe
PID 1676 wrote to memory of 1028	1676	rundll32.exe	rundll32.exe
PID 1676 wrote to memory of 1028	1676	rundll32.exe	rundll32.exe
PID 1676 wrote to memory of 1028	1676	rundll32.exe	rundll32.exe
PID 1676 wrote to memory of 1028	1676	rundll32.exe	rundll32.exe

C:\Windows\system32\wscript.exe
wscript.exe C:\Users\Admin\AppData\Local\Temp\20161205_3f1d7664595d2ff885b9fa3bf8a96bbf.js
1⤵
- Blocklisted process makes network request
- Suspicious use of WriteProcessMemory
PID:1048

C:\Windows\System32\rundll32.exe
"C:\Windows\System32\rundll32.exe" C:\Users\Admin\AppData\Local\Temp\EBB852~1.ZK,TOxNKCZjUHCfTf9D
2⤵
- Suspicious use of WriteProcessMemory
PID:1676

C:\Windows\SysWOW64\rundll32.exe
"C:\Windows\System32\rundll32.exe" C:\Users\Admin\AppData\Local\Temp\EBB852~1.ZK,TOxNKCZjUHCfTf9D
3⤵
- Blocklisted process makes network request
- Modifies extensions of user files
- Loads dropped DLL
PID:1028

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\EBB852~1.ZK
MD5
6b760fbbefa7f8dd1daaa93ebc38725a

SHA1
81841f24244485dae1c1834df3e544893d258f06

SHA256
c564dcc24fa9909a4482feb46d52fa96869a2ad6c8c87b5cbeee19b9b36a0ff6

SHA512
6ea91469538c40dada22b66373da0deb57f48d9d535e5ebd8199b5074a26c93a297386389a58468032dec1aef36423271d7ffaf84feba772b531c9ccd46fc68a

Download Submit
\Users\Admin\AppData\Local\Temp\EBB852~1.ZK
MD5
6b760fbbefa7f8dd1daaa93ebc38725a

SHA1
81841f24244485dae1c1834df3e544893d258f06

SHA256
c564dcc24fa9909a4482feb46d52fa96869a2ad6c8c87b5cbeee19b9b36a0ff6

SHA512
6ea91469538c40dada22b66373da0deb57f48d9d535e5ebd8199b5074a26c93a297386389a58468032dec1aef36423271d7ffaf84feba772b531c9ccd46fc68a

Download Submit
memory/1028-57-0x0000000000000000-mapping.dmp

Download
memory/1028-58-0x0000000074E51000-0x0000000074E53000-memory.dmp

Filesize
8KB

Download
memory/1028-60-0x00000000000F0000-0x00000000000F1000-memory.dmp

Filesize
4KB

Download
memory/1028-61-0x00000000749F0000-0x0000000074A2A000-memory.dmp

Filesize
232KB

Download
memory/1676-55-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

Replay Monitor

Loading Replay Monitor...

Downloads