nefilim | 5670c99223078ac71638a076ca00bfc6ceed9a5a6ad34029ea45f6e881683e3f

Analysis

max time kernel
129s
max time network
134s
platform
windows10-2004_x64
resource
win10v2004-20230220-en
resource tags

arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system
submitted
07-03-2023 01:08

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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 6 IoCs

Ransomware generally changes the extension on encrypted files.

ransomware

Processes:

2daa5144081dd288c1dc936ec27b1c8bd709633450ceb73f235fccd1c3d3c62e.exe

description	ioc	process
File renamed	C:\Users\Admin\Pictures\ExitRename.tif => C:\Users\Admin\Pictures\ExitRename.tif.NEFILIM	2daa5144081dd288c1dc936ec27b1c8bd709633450ceb73f235fccd1c3d3c62e.exe
File opened for modification	C:\Users\Admin\Pictures\InitializeProtect.tiff	2daa5144081dd288c1dc936ec27b1c8bd709633450ceb73f235fccd1c3d3c62e.exe
File renamed	C:\Users\Admin\Pictures\InitializeProtect.tiff => C:\Users\Admin\Pictures\InitializeProtect.tiff.NEFILIM	2daa5144081dd288c1dc936ec27b1c8bd709633450ceb73f235fccd1c3d3c62e.exe
File renamed	C:\Users\Admin\Pictures\PublishAdd.tif => C:\Users\Admin\Pictures\PublishAdd.tif.NEFILIM	2daa5144081dd288c1dc936ec27b1c8bd709633450ceb73f235fccd1c3d3c62e.exe
File renamed	C:\Users\Admin\Pictures\UninstallComplete.tif => C:\Users\Admin\Pictures\UninstallComplete.tif.NEFILIM	2daa5144081dd288c1dc936ec27b1c8bd709633450ceb73f235fccd1c3d3c62e.exe
File renamed	C:\Users\Admin\Pictures\WatchRequest.tif => C:\Users\Admin\Pictures\WatchRequest.tif.NEFILIM	2daa5144081dd288c1dc936ec27b1c8bd709633450ceb73f235fccd1c3d3c62e.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

2daa5144081dd288c1dc936ec27b1c8bd709633450ceb73f235fccd1c3d3c62e.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1675742406-747946869-1029867430-1000\Control Panel\International\Geo\Nation	2daa5144081dd288c1dc936ec27b1c8bd709633450ceb73f235fccd1c3d3c62e.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

4544 timeout.exe

pid	process
4544	timeout.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

2daa5144081dd288c1dc936ec27b1c8bd709633450ceb73f235fccd1c3d3c62e.execmd.exe

description	pid	process	target process
PID 3344 wrote to memory of 4528	3344	2daa5144081dd288c1dc936ec27b1c8bd709633450ceb73f235fccd1c3d3c62e.exe	cmd.exe
PID 3344 wrote to memory of 4528	3344	2daa5144081dd288c1dc936ec27b1c8bd709633450ceb73f235fccd1c3d3c62e.exe	cmd.exe
PID 3344 wrote to memory of 4528	3344	2daa5144081dd288c1dc936ec27b1c8bd709633450ceb73f235fccd1c3d3c62e.exe	cmd.exe
PID 4528 wrote to memory of 4544	4528	cmd.exe	timeout.exe
PID 4528 wrote to memory of 4544	4528	cmd.exe	timeout.exe
PID 4528 wrote to memory of 4544	4528	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
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3344
- 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⤵
  - Suspicious use of WriteProcessMemory
  PID:4528
- - C:\Windows\SysWOW64\timeout.exe
    timeout /t 3 /nobreak
    3⤵
    - Delays execution with timeout.exe
    PID:4544

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

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

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