b7dd3bce3ebfbc2d5e3a9f00d47f27cb6a5895c4618c878e314e573a7c216df1

Analysis

max time kernel
150s
max time network
160s
platform
windows10-ltsc 2021_x64
resource
win10ltsc2021-20241211-en
resource tags

arch:x64arch:x86image:win10ltsc2021-20241211-enlocale:en-usos:windows10-ltsc 2021-x64system
submitted
04-01-2025 01:04

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General

Target

The-MALWARE-Repo-master/Email-Worm/Lentin/Lentin.d.exe
Size

26KB
MD5

d9ce0273f791da275ed2a69446413a87
SHA1

38cf7ea93d74fb770bfba766845cf29bef0169df
SHA256

aa2e8d70654e30cf11e2b57e92cea72a9823a048f75fc9029da04e1e4d8a9810
SHA512

a521b2a55207c9996c0399bc0403c0865c23bf7457b5cfa80d0bec2c2eeb898a30599d99dda15ece4aa5db405c46ea4183d4b3bac20a3d5836775efccedd0f8e
SSDEEP

384:EfhdE5u7Gd2xurrqotHeK5oeh94uKcAvl50HHMqn7VtN3F/n4tyyUGLtFly0s:SEc7KPrGotHeKzAXvWMO13ZerL/5s

Score

7^/10

discovery persistence

Malware Config

Signatures

Modifies system executable filetype association 2 TTPs 2 IoCs

persistence

Modify Registry

T1112

Change Default File Association

T1546.001

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command	Lentin.d.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "\"C:\\Windows\\nlwsrr\" %1 %*"	Lentin.d.exe

Drops file in Windows directory 4 IoCs

description	ioc	Process
File created	C:\Windows\nlwsrr.txt	Lentin.d.exe
File created	C:\Windows\nlwsrr.exe	Lentin.d.exe
File opened for modification	C:\Windows\nlwsrr.exe	Lentin.d.exe
File opened for modification	C:\Windows\nlwsrrnlwsrr.dll	Lentin.d.exe

System Location Discovery: System Language Discovery 1 TTPs 1 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Lentin.d.exe

Modifies registry class 2 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command	Lentin.d.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "\"C:\\Windows\\nlwsrr\" %1 %*"	Lentin.d.exe

C:\Users\Admin\AppData\Local\Temp\The-MALWARE-Repo-master\Email-Worm\Lentin\Lentin.d.exe
"C:\Users\Admin\AppData\Local\Temp\The-MALWARE-Repo-master\Email-Worm\Lentin\Lentin.d.exe"
1⤵
- Modifies system executable filetype association
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Modifies registry class
PID:4640

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Event Triggered Execution

T1546

Change Default File Association

T1546.001

Privilege Escalation

Event Triggered Execution

T1546

Change Default File Association

T1546.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/4640-0-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

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memory/4640-3-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads