nefilim | df17933406a8f189b5a3ac728e0437ac178a6139ce18d9c25c3ba53b7e8fb712

General

Target

df17933406a8f189b5a3ac728e0437ac178a6139ce18d9c25c3ba53b7e8fb712.exe
Size

66KB
MD5

c38cf7a56a285bbd15156032494f2432
SHA1

1b2ca5c1454cd0cf0032e2ae09f8604fb896c580
SHA256

df17933406a8f189b5a3ac728e0437ac178a6139ce18d9c25c3ba53b7e8fb712
SHA512

bd375a8b77eacac3ba2015d11e56f8ece41fe4f45cda1bcdc0b64eda9b6e7988084a5a4870b911ddd51fd4b25415b2d9996fa8ef9a63620c8012f4a8cacabcf0

Score

10^/10

nefilim ransomware

Malware Config

Extracted

Path

C:\NEFILIM-DECRYPT.txt

Ransom Note

All of your files have been encrypted with military grade algorithms. We ensure that the only way to retrieve your data is with our software. We will make sure you retrieve your data swiftly and securely when our demands are met. Restoration of your data requires a private key which only we possess. A large amount of your private files have been extracted and is kept in a secure location. If you do not contact us in seven working days of the breach we will start leaking the data. After you contact us we will provide you proof that your files have been extracted. To confirm that our decryption software works email to us 2 files from random computers. You will receive further instructions after you send us the test files. [email protected] [email protected] [email protected]

Emails

[email protected]

Signatures

Nefilim
Ransomware first seen in early 2020 which shares code with the Nemty family. Rewritten in Golang in July 2020.
ransomware nefilim

Modifies extensions of user files 8 IoCs

Ransomware generally changes the extension on encrypted files.

ransomware

Processes:

df17933406a8f189b5a3ac728e0437ac178a6139ce18d9c25c3ba53b7e8fb712.exe

description	ioc	process
File renamed	C:\Users\Admin\Pictures\BlockUnpublish.raw => C:\Users\Admin\Pictures\BlockUnpublish.raw.NEFILIM	df17933406a8f189b5a3ac728e0437ac178a6139ce18d9c25c3ba53b7e8fb712.exe
File renamed	C:\Users\Admin\Pictures\CompressRepair.raw => C:\Users\Admin\Pictures\CompressRepair.raw.NEFILIM	df17933406a8f189b5a3ac728e0437ac178a6139ce18d9c25c3ba53b7e8fb712.exe
File opened for modification	C:\Users\Admin\Pictures\InvokeSelect.tiff	df17933406a8f189b5a3ac728e0437ac178a6139ce18d9c25c3ba53b7e8fb712.exe
File renamed	C:\Users\Admin\Pictures\InvokeSelect.tiff => C:\Users\Admin\Pictures\InvokeSelect.tiff.NEFILIM	df17933406a8f189b5a3ac728e0437ac178a6139ce18d9c25c3ba53b7e8fb712.exe
File renamed	C:\Users\Admin\Pictures\RestorePublish.png => C:\Users\Admin\Pictures\RestorePublish.png.NEFILIM	df17933406a8f189b5a3ac728e0437ac178a6139ce18d9c25c3ba53b7e8fb712.exe
File renamed	C:\Users\Admin\Pictures\UnlockEnter.tif => C:\Users\Admin\Pictures\UnlockEnter.tif.NEFILIM	df17933406a8f189b5a3ac728e0437ac178a6139ce18d9c25c3ba53b7e8fb712.exe
File renamed	C:\Users\Admin\Pictures\UnpublishEnter.png => C:\Users\Admin\Pictures\UnpublishEnter.png.NEFILIM	df17933406a8f189b5a3ac728e0437ac178a6139ce18d9c25c3ba53b7e8fb712.exe
File renamed	C:\Users\Admin\Pictures\BlockDisable.tif => C:\Users\Admin\Pictures\BlockDisable.tif.NEFILIM	df17933406a8f189b5a3ac728e0437ac178a6139ce18d9c25c3ba53b7e8fb712.exe

Deletes itself 1 IoCs

Processes:

cmd.exe

pid process

1644 cmd.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082
Delays execution with timeout.exe 1 IoCs
evasion

Processes:

timeout.exe

pid process

288 timeout.exe

pid	process
1644	cmd.exe

pid	process
288	timeout.exe

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

df17933406a8f189b5a3ac728e0437ac178a6139ce18d9c25c3ba53b7e8fb712.execmd.exe

description	pid	process	target process
PID 1388 wrote to memory of 1644	1388	df17933406a8f189b5a3ac728e0437ac178a6139ce18d9c25c3ba53b7e8fb712.exe	cmd.exe
PID 1388 wrote to memory of 1644	1388	df17933406a8f189b5a3ac728e0437ac178a6139ce18d9c25c3ba53b7e8fb712.exe	cmd.exe
PID 1388 wrote to memory of 1644	1388	df17933406a8f189b5a3ac728e0437ac178a6139ce18d9c25c3ba53b7e8fb712.exe	cmd.exe
PID 1388 wrote to memory of 1644	1388	df17933406a8f189b5a3ac728e0437ac178a6139ce18d9c25c3ba53b7e8fb712.exe	cmd.exe
PID 1644 wrote to memory of 288	1644	cmd.exe	timeout.exe
PID 1644 wrote to memory of 288	1644	cmd.exe	timeout.exe
PID 1644 wrote to memory of 288	1644	cmd.exe	timeout.exe
PID 1644 wrote to memory of 288	1644	cmd.exe	timeout.exe

C:\Users\Admin\AppData\Local\Temp\df17933406a8f189b5a3ac728e0437ac178a6139ce18d9c25c3ba53b7e8fb712.exe
"C:\Users\Admin\AppData\Local\Temp\df17933406a8f189b5a3ac728e0437ac178a6139ce18d9c25c3ba53b7e8fb712.exe"
1⤵
- Modifies extensions of user files
- Suspicious use of WriteProcessMemory
PID:1388
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c timeout /t 3 /nobreak && del "C:\Users\Admin\AppData\Local\Temp\df17933406a8f189b5a3ac728e0437ac178a6139ce18d9c25c3ba53b7e8fb712.exe" /s /f /q
  2⤵
  - Deletes itself
  - Suspicious use of WriteProcessMemory
  PID:1644
- - C:\Windows\SysWOW64\timeout.exe
    timeout /t 3 /nobreak
    3⤵
    - Delays execution with timeout.exe
    PID:288

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/1388-55-0x00000000758A1000-0x00000000758A3000-memory.dmp

Filesize
8KB

Download

Analysis

Sharing