locky | fad379ba7f9d1b7e2d8efd4f92e622e386e56e4a05499d4a0c80e05072a5d355

Analysis

max time kernel
151s
max time network
119s
platform
windows7_x64
resource
win7-en-20211014
submitted
17-11-2021 11:53

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General

Target

20161205_9ce2d7bf1b9cf61897a960de3e0481d0.js
Size

13KB
MD5

558d1d1e23ddd0847e8a5f2d5ed4f930
SHA1

9c59224dff0787058da1a8b2c1c6182a1a6dd9d5
SHA256

fad379ba7f9d1b7e2d8efd4f92e622e386e56e4a05499d4a0c80e05072a5d355
SHA512

ad98ec378d4ae717dc93e94fbc672907345e78e85e1d1a0fa3677a517362a6e61ba1322c0a35743ab93d00e4a7968ef603c854e721365a62e9f08b8ad3fc1beb

Score

10^/10

locky locky_osiris ransomware

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

Blocklisted process makes network request 7 IoCs

flow	pid	Process
6	1680	wscript.exe
8	1680	wscript.exe
9	1888	rundll32.exe
12	1888	rundll32.exe
13	1888	rundll32.exe
14	1888	rundll32.exe
15	1888	rundll32.exe

Modifies extensions of user files 2 IoCs

Ransomware generally changes the extension on encrypted files.

ransomware

description	ioc	Process
File opened for modification	\??\c:\Users\Admin\Pictures\CheckpointShow.tiff	rundll32.exe
File opened for modification	\??\c:\Users\Admin\Pictures\RestartSubmit.tiff	rundll32.exe

Loads dropped DLL 1 IoCs

pid	Process
1888	rundll32.exe

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

System Information Discovery
T1082

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 1680 wrote to memory of 1940	1680	wscript.exe	30
PID 1680 wrote to memory of 1940	1680	wscript.exe	30
PID 1680 wrote to memory of 1940	1680	wscript.exe	30
PID 1940 wrote to memory of 1888	1940	rundll32.exe	31
PID 1940 wrote to memory of 1888	1940	rundll32.exe	31
PID 1940 wrote to memory of 1888	1940	rundll32.exe	31
PID 1940 wrote to memory of 1888	1940	rundll32.exe	31
PID 1940 wrote to memory of 1888	1940	rundll32.exe	31
PID 1940 wrote to memory of 1888	1940	rundll32.exe	31
PID 1940 wrote to memory of 1888	1940	rundll32.exe	31

C:\Windows\system32\wscript.exe
wscript.exe C:\Users\Admin\AppData\Local\Temp\20161205_9ce2d7bf1b9cf61897a960de3e0481d0.js
1⤵
- Blocklisted process makes network request
- Suspicious use of WriteProcessMemory
PID:1680
- C:\Windows\System32\rundll32.exe
  "C:\Windows\System32\rundll32.exe" C:\Users\Admin\AppData\Local\Temp\5kCGed9T.zk,TOxNKCZjUHCfTf9D
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1940
- - C:\Windows\SysWOW64\rundll32.exe
    "C:\Windows\System32\rundll32.exe" C:\Users\Admin\AppData\Local\Temp\5kCGed9T.zk,TOxNKCZjUHCfTf9D
    3⤵
    - Blocklisted process makes network request
    - Modifies extensions of user files
    - Loads dropped DLL
    PID:1888

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/1888-58-0x00000000754F1000-0x00000000754F3000-memory.dmp

Filesize
8KB

Download
memory/1888-60-0x00000000001E0000-0x00000000001E1000-memory.dmp

Filesize
4KB

Download
memory/1888-61-0x0000000074B40000-0x0000000074B7A000-memory.dmp

Filesize
232KB

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