nefilim | df17933406a8f189b5a3ac728e0437ac178a6139ce18d9c25c3ba53b7e8fb712

General

Target

df17933406a8f189b5a3ac728e0437ac178a6139ce18d9c25c3ba53b7e8fb712.exe
Size

66KB
MD5

c38cf7a56a285bbd15156032494f2432
SHA1

1b2ca5c1454cd0cf0032e2ae09f8604fb896c580
SHA256

df17933406a8f189b5a3ac728e0437ac178a6139ce18d9c25c3ba53b7e8fb712
SHA512

bd375a8b77eacac3ba2015d11e56f8ece41fe4f45cda1bcdc0b64eda9b6e7988084a5a4870b911ddd51fd4b25415b2d9996fa8ef9a63620c8012f4a8cacabcf0

Score

10^/10

nefilim persistence 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 12 IoCs

Ransomware generally changes the extension on encrypted files.

ransomware

Processes:

df17933406a8f189b5a3ac728e0437ac178a6139ce18d9c25c3ba53b7e8fb712.exe

description	ioc	process
File renamed	C:\Users\Admin\Pictures\SuspendStart.raw => C:\Users\Admin\Pictures\SuspendStart.raw.NEFILIM	df17933406a8f189b5a3ac728e0437ac178a6139ce18d9c25c3ba53b7e8fb712.exe
File opened for modification	C:\Users\Admin\Pictures\ApproveNew.tiff	df17933406a8f189b5a3ac728e0437ac178a6139ce18d9c25c3ba53b7e8fb712.exe
File renamed	C:\Users\Admin\Pictures\ApproveNew.tiff => C:\Users\Admin\Pictures\ApproveNew.tiff.NEFILIM	df17933406a8f189b5a3ac728e0437ac178a6139ce18d9c25c3ba53b7e8fb712.exe
File renamed	C:\Users\Admin\Pictures\GetSuspend.raw => C:\Users\Admin\Pictures\GetSuspend.raw.NEFILIM	df17933406a8f189b5a3ac728e0437ac178a6139ce18d9c25c3ba53b7e8fb712.exe
File renamed	C:\Users\Admin\Pictures\GroupUninstall.crw => C:\Users\Admin\Pictures\GroupUninstall.crw.NEFILIM	df17933406a8f189b5a3ac728e0437ac178a6139ce18d9c25c3ba53b7e8fb712.exe
File renamed	C:\Users\Admin\Pictures\ResolvePush.raw => C:\Users\Admin\Pictures\ResolvePush.raw.NEFILIM	df17933406a8f189b5a3ac728e0437ac178a6139ce18d9c25c3ba53b7e8fb712.exe
File renamed	C:\Users\Admin\Pictures\RestartApprove.crw => C:\Users\Admin\Pictures\RestartApprove.crw.NEFILIM	df17933406a8f189b5a3ac728e0437ac178a6139ce18d9c25c3ba53b7e8fb712.exe
File renamed	C:\Users\Admin\Pictures\SplitConnect.raw => C:\Users\Admin\Pictures\SplitConnect.raw.NEFILIM	df17933406a8f189b5a3ac728e0437ac178a6139ce18d9c25c3ba53b7e8fb712.exe
File renamed	C:\Users\Admin\Pictures\SyncPing.raw => C:\Users\Admin\Pictures\SyncPing.raw.NEFILIM	df17933406a8f189b5a3ac728e0437ac178a6139ce18d9c25c3ba53b7e8fb712.exe
File renamed	C:\Users\Admin\Pictures\UnlockRevoke.raw => C:\Users\Admin\Pictures\UnlockRevoke.raw.NEFILIM	df17933406a8f189b5a3ac728e0437ac178a6139ce18d9c25c3ba53b7e8fb712.exe
File renamed	C:\Users\Admin\Pictures\UnprotectConfirm.raw => C:\Users\Admin\Pictures\UnprotectConfirm.raw.NEFILIM	df17933406a8f189b5a3ac728e0437ac178a6139ce18d9c25c3ba53b7e8fb712.exe
File renamed	C:\Users\Admin\Pictures\CompleteRead.png => C:\Users\Admin\Pictures\CompleteRead.png.NEFILIM	df17933406a8f189b5a3ac728e0437ac178a6139ce18d9c25c3ba53b7e8fb712.exe

Sets service image path in registry 2 TTPs
persistence

Registry Run Keys / Startup Folder
T1060

Modify Registry
T1112

Drops file in Windows directory 6 IoCs

Processes:

svchost.exe

description	ioc	process
File opened for modification	C:\Windows\SoftwareDistribution\ReportingEvents.log	svchost.exe
File opened for modification	C:\Windows\WindowsUpdate.log	svchost.exe
File opened for modification	C:\Windows\SoftwareDistribution\DataStore\Logs\edb.chk	svchost.exe
File opened for modification	C:\Windows\SoftwareDistribution\DataStore\Logs\edb.log	svchost.exe
File opened for modification	C:\Windows\SoftwareDistribution\DataStore\DataStore.edb	svchost.exe
File opened for modification	C:\Windows\SoftwareDistribution\DataStore\DataStore.jfm	svchost.exe

Modifies data under HKEY_USERS 41 IoCs

Processes:

WaaSMedicAgent.exe

description	ioc	process
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\CA	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\trust\Certificates	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Root\CTLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\TrustedPeople	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\trust\CRLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\trust\Certificates	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\CA	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\TrustedPeople\Certificates	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\trust	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\trust\CTLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\CA\CTLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\Disallowed\CTLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Root\Certificates	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\SmartCardRoot\Certificates	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\SmartCardRoot\CRLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\SmartCardRoot\CTLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\trust	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\trust\CRLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\CA\Certificates	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\CA\CTLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Disallowed\CRLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\Disallowed	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\Disallowed\CRLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\TrustedPeople	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Root	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\TrustedPeople\CRLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\WinTrust\Trust Providers\Software Publishing	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\CA\CRLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\CA\CRLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Disallowed	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Disallowed\Certificates	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\Disallowed\Certificates	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\TrustedPeople\CTLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\trust\CTLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\TrustedPeople\Certificates	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\CA\Certificates	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Disallowed\CTLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Root\CRLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\SmartCardRoot	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\TrustedPeople\CRLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\TrustedPeople\CTLs	WaaSMedicAgent.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

Processes:

svchost.exe

description	pid	process
Token: SeShutdownPrivilege	4944	svchost.exe
Token: SeCreatePagefilePrivilege	4944	svchost.exe
Token: SeShutdownPrivilege	4944	svchost.exe
Token: SeCreatePagefilePrivilege	4944	svchost.exe
Token: SeShutdownPrivilege	4944	svchost.exe
Token: SeCreatePagefilePrivilege	4944	svchost.exe

C:\Users\Admin\AppData\Local\Temp\df17933406a8f189b5a3ac728e0437ac178a6139ce18d9c25c3ba53b7e8fb712.exe
"C:\Users\Admin\AppData\Local\Temp\df17933406a8f189b5a3ac728e0437ac178a6139ce18d9c25c3ba53b7e8fb712.exe"
1⤵
- Modifies extensions of user files
PID:4608

C:\Windows\System32\WaaSMedicAgent.exe
C:\Windows\System32\WaaSMedicAgent.exe de26a79fa0f6969090475828d7f7380c z1ytZviW3UWXXe7FFO3Dkg.0.1.0.0.0
1⤵
- Modifies data under HKEY_USERS
PID:1524

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k netsvcs -p -s wuauserv
1⤵
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
PID:4944

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/4944-130-0x00000211E5D40000-0x00000211E5D50000-memory.dmp

Filesize
64KB

Download
memory/4944-131-0x00000211E5DA0000-0x00000211E5DB0000-memory.dmp

Filesize
64KB

Download
memory/4944-132-0x00000211E8AC0000-0x00000211E8AC4000-memory.dmp

Filesize
16KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads