nefilim | 5670c99223078ac71638a076ca00bfc6ceed9a5a6ad34029ea45f6e881683e3f

Analysis

max time kernel
30s
max time network
34s
platform
windows7_x64
resource
win7-20230220-en
resource tags

arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
submitted
07-03-2023 01:08

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

2daa5144081dd288c1dc936ec27b1c8bd709633450ceb73f235fccd1c3d3c62e.exe
Size

70KB
MD5

193e702195e8ed5c50cc482569559462
SHA1

47a5307b78fa2c60c20ce63c553aef4a6d5a3e1c
SHA256

2daa5144081dd288c1dc936ec27b1c8bd709633450ceb73f235fccd1c3d3c62e
SHA512

d5ae5a8bccfc08bc07834caaebaed7a6cde1911170eb8de99322bf15be3ad111b5042d6401dcb06e64a6a429eee19d964878089af205474b377b77627bb63a35
SSDEEP

768:lXStkFWTBhyugDC60CPJkEBx9w7mSDh3vkkjvshT3ED18nv04ZPqpb348Uq1krHO:liMWV3gDCk6EBwT/kJbvkbuq1krj0z

Score

10^/10

nefilim ransomware

Malware Config

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 3 IoCs

Ransomware generally changes the extension on encrypted files.

ransomware

Processes:

2daa5144081dd288c1dc936ec27b1c8bd709633450ceb73f235fccd1c3d3c62e.exe

description	ioc	process
File renamed	C:\Users\Admin\Pictures\ConvertFromDismount.png => C:\Users\Admin\Pictures\ConvertFromDismount.png.NEFILIM	2daa5144081dd288c1dc936ec27b1c8bd709633450ceb73f235fccd1c3d3c62e.exe
File renamed	C:\Users\Admin\Pictures\InvokeImport.tif => C:\Users\Admin\Pictures\InvokeImport.tif.NEFILIM	2daa5144081dd288c1dc936ec27b1c8bd709633450ceb73f235fccd1c3d3c62e.exe
File renamed	C:\Users\Admin\Pictures\LimitCompress.tif => C:\Users\Admin\Pictures\LimitCompress.tif.NEFILIM	2daa5144081dd288c1dc936ec27b1c8bd709633450ceb73f235fccd1c3d3c62e.exe

Deletes itself 1 IoCs

Processes:

cmd.exe

pid process

812 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

1336 timeout.exe

pid	process
812	cmd.exe

pid	process
1336	timeout.exe

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

2daa5144081dd288c1dc936ec27b1c8bd709633450ceb73f235fccd1c3d3c62e.execmd.exe

description	pid	process	target process
PID 1744 wrote to memory of 812	1744	2daa5144081dd288c1dc936ec27b1c8bd709633450ceb73f235fccd1c3d3c62e.exe	cmd.exe
PID 1744 wrote to memory of 812	1744	2daa5144081dd288c1dc936ec27b1c8bd709633450ceb73f235fccd1c3d3c62e.exe	cmd.exe
PID 1744 wrote to memory of 812	1744	2daa5144081dd288c1dc936ec27b1c8bd709633450ceb73f235fccd1c3d3c62e.exe	cmd.exe
PID 1744 wrote to memory of 812	1744	2daa5144081dd288c1dc936ec27b1c8bd709633450ceb73f235fccd1c3d3c62e.exe	cmd.exe
PID 812 wrote to memory of 1336	812	cmd.exe	timeout.exe
PID 812 wrote to memory of 1336	812	cmd.exe	timeout.exe
PID 812 wrote to memory of 1336	812	cmd.exe	timeout.exe
PID 812 wrote to memory of 1336	812	cmd.exe	timeout.exe

C:\Users\Admin\AppData\Local\Temp\2daa5144081dd288c1dc936ec27b1c8bd709633450ceb73f235fccd1c3d3c62e.exe
"C:\Users\Admin\AppData\Local\Temp\2daa5144081dd288c1dc936ec27b1c8bd709633450ceb73f235fccd1c3d3c62e.exe"
1⤵
- Modifies extensions of user files
- Suspicious use of WriteProcessMemory
PID:1744
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c timeout /t 3 /nobreak && del "C:\Users\Admin\AppData\Local\Temp\2daa5144081dd288c1dc936ec27b1c8bd709633450ceb73f235fccd1c3d3c62e.exe" /s /f /q
  2⤵
  - Deletes itself
  - Suspicious use of WriteProcessMemory
  PID:812
- - C:\Windows\SysWOW64\timeout.exe
    timeout /t 3 /nobreak
    3⤵
    - Delays execution with timeout.exe
    PID:1336

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

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads