Malware Analysis Report

2025-08-05 12:45

Sample ID 230308-kkx47see3s
Target oncY2y9LclXNvW43DvC6d.dll
SHA256 cfad0dcd5988f2f30d91b4c51bf68ff571ec988393934ecd7bcb876163f5ea66
Tags
emotet epoch4 banker persistence trojan
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V6

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

cfad0dcd5988f2f30d91b4c51bf68ff571ec988393934ecd7bcb876163f5ea66

Threat Level: Known bad

The file oncY2y9LclXNvW43DvC6d.dll was found to be: Known bad.

Malicious Activity Summary

emotet epoch4 banker persistence trojan

Emotet

Adds Run key to start application

Suspicious behavior: EnumeratesProcesses

Suspicious behavior: RenamesItself

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2023-03-08 08:41

Signatures

N/A

Analysis: behavioral2

Detonation Overview

Submitted

2023-03-08 08:40

Reported

2023-03-08 08:47

Platform

win10v2004-20230220-en

Max time kernel

144s

Max time network

132s

Command Line

regsvr32 /s C:\Users\Admin\AppData\Local\Temp\oncY2y9LclXNvW43DvC6d.dll

Signatures

Emotet

trojan banker emotet

Adds Run key to start application

persistence
Description Indicator Process Target
Key created \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run C:\Windows\system32\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Vnkv.dll = "C:\\Windows\\system32\\regsvr32.exe \"C:\\Windows\\system32\\AzxryDcHtAaJZ\\Vnkv.dll\"" C:\Windows\system32\regsvr32.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Windows\system32\regsvr32.exe N/A
N/A N/A C:\Windows\system32\regsvr32.exe N/A
N/A N/A C:\Windows\system32\regsvr32.exe N/A
N/A N/A C:\Windows\system32\regsvr32.exe N/A
N/A N/A C:\Windows\system32\regsvr32.exe N/A
N/A N/A C:\Windows\system32\regsvr32.exe N/A

Suspicious behavior: RenamesItself

Description Indicator Process Target
N/A N/A C:\Windows\system32\regsvr32.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 4732 wrote to memory of 3244 N/A C:\Windows\system32\regsvr32.exe C:\Windows\system32\regsvr32.exe
PID 4732 wrote to memory of 3244 N/A C:\Windows\system32\regsvr32.exe C:\Windows\system32\regsvr32.exe

Processes

C:\Windows\system32\regsvr32.exe

regsvr32 /s C:\Users\Admin\AppData\Local\Temp\oncY2y9LclXNvW43DvC6d.dll

C:\Windows\system32\regsvr32.exe

C:\Windows\system32\regsvr32.exe "C:\Windows\system32\AzxryDcHtAaJZ\Vnkv.dll"

Network

Country Destination Domain Proto
NL 178.79.208.1:80 tcp
US 8.8.8.8:53 0.204.248.87.in-addr.arpa udp
US 8.8.8.8:53 123.108.74.40.in-addr.arpa udp
US 8.8.8.8:53 76.38.195.152.in-addr.arpa udp
US 8.8.8.8:53 104.219.191.52.in-addr.arpa udp
US 8.8.8.8:53 44.8.109.52.in-addr.arpa udp
US 13.89.179.9:443 tcp
FR 91.121.146.47:8080 91.121.146.47 tcp
US 8.8.8.8:53 47.146.121.91.in-addr.arpa udp
US 8.8.8.8:53 234.238.32.23.in-addr.arpa udp
NL 178.79.208.1:80 tcp
NL 178.79.208.1:80 tcp
NL 173.223.113.164:443 tcp

Files

memory/4732-133-0x0000000180000000-0x000000018002D000-memory.dmp

memory/4732-136-0x0000000001300000-0x0000000001301000-memory.dmp

memory/3244-140-0x0000000000400000-0x00000000004B0000-memory.dmp

memory/3244-153-0x0000000000400000-0x00000000004B0000-memory.dmp

Analysis: behavioral1

Detonation Overview

Submitted

2023-03-08 08:40

Reported

2023-03-08 08:47

Platform

win7-20230220-en

Max time kernel

137s

Max time network

149s

Command Line

regsvr32 /s C:\Users\Admin\AppData\Local\Temp\oncY2y9LclXNvW43DvC6d.dll

Signatures

Emotet

trojan banker emotet

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Windows\system32\regsvr32.exe N/A
N/A N/A C:\Windows\system32\regsvr32.exe N/A
N/A N/A C:\Windows\system32\regsvr32.exe N/A

Suspicious behavior: RenamesItself

Description Indicator Process Target
N/A N/A C:\Windows\system32\regsvr32.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1952 wrote to memory of 1268 N/A C:\Windows\system32\regsvr32.exe C:\Windows\system32\regsvr32.exe
PID 1952 wrote to memory of 1268 N/A C:\Windows\system32\regsvr32.exe C:\Windows\system32\regsvr32.exe
PID 1952 wrote to memory of 1268 N/A C:\Windows\system32\regsvr32.exe C:\Windows\system32\regsvr32.exe
PID 1952 wrote to memory of 1268 N/A C:\Windows\system32\regsvr32.exe C:\Windows\system32\regsvr32.exe
PID 1952 wrote to memory of 1268 N/A C:\Windows\system32\regsvr32.exe C:\Windows\system32\regsvr32.exe

Processes

C:\Windows\system32\regsvr32.exe

regsvr32 /s C:\Users\Admin\AppData\Local\Temp\oncY2y9LclXNvW43DvC6d.dll

C:\Windows\system32\regsvr32.exe

C:\Windows\system32\regsvr32.exe "C:\Windows\system32\YuJPf\iFukdXfAHgnBdl.dll"

Network

Country Destination Domain Proto
FR 91.121.146.47:8080 tcp
FR 91.121.146.47:8080 tcp
US 66.228.32.31:7080 tcp
US 66.228.32.31:7080 tcp
KR 182.162.143.56:443 tcp
KR 182.162.143.56:443 tcp
BR 187.63.160.88:80 tcp
BR 187.63.160.88:80 tcp
US 167.172.199.165:8080 tcp
US 167.172.199.165:8080 tcp
DE 164.90.222.65:443 tcp
DE 164.90.222.65:443 tcp
US 104.168.155.143:8080 tcp
US 104.168.155.143:8080 tcp
KG 91.207.28.33:8080 tcp
US 72.15.201.15:8080 tcp
KR 183.111.227.137:8080 tcp
IN 103.132.242.26:8080 tcp
GB 159.65.88.10:8080 tcp

Files

memory/1952-54-0x0000000001EC0000-0x0000000001F70000-memory.dmp

memory/1952-56-0x0000000180000000-0x000000018002D000-memory.dmp

memory/1952-59-0x00000000003A0000-0x00000000003A1000-memory.dmp

memory/1268-60-0x0000000000350000-0x0000000000400000-memory.dmp