Malware Analysis Report

2024-12-06 03:02

Sample ID 241119-f1ekks1gkp
Target Korrekturlsning.exe
SHA256 00b33c93902d9cb8722957b2512a45196b37284ffd85489e74d973aae7ec1962
Tags
discovery guloader vipkeylogger downloader keylogger persistence stealer collection spyware
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral3

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral4

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

00b33c93902d9cb8722957b2512a45196b37284ffd85489e74d973aae7ec1962

Threat Level: Known bad

The file Korrekturlsning.exe was found to be: Known bad.

Malicious Activity Summary

discovery guloader vipkeylogger downloader keylogger persistence stealer collection spyware

Guloader family

Vipkeylogger family

Guloader,Cloudeye

VIPKeylogger

Loads dropped DLL

Reads user/profile data of local email clients

Reads user/profile data of web browsers

Accesses Microsoft Outlook profiles

Looks up external IP address via web service

Adds Run key to start application

Suspicious use of NtSetInformationThreadHideFromDebugger

Suspicious use of SetThreadContext

Suspicious use of NtCreateThreadExHideFromDebugger

Drops file in Windows directory

Program crash

Unsigned PE

System Location Discovery: System Language Discovery

Enumerates physical storage devices

Browser Information Discovery

Suspicious use of WriteProcessMemory

Suspicious behavior: MapViewOfSection

outlook_win_path

outlook_office_path

Suspicious use of AdjustPrivilegeToken

Suspicious behavior: EnumeratesProcesses

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-11-19 05:20

Signatures

Unsigned PE

Description Indicator Process Target
N/A N/A N/A N/A
N/A N/A N/A N/A

Analysis: behavioral3

Detonation Overview

Submitted

2024-11-19 05:20

Reported

2024-11-19 05:22

Platform

win7-20240903-en

Max time kernel

122s

Max time network

123s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\$PLUGINSDIR\System.dll,#1

Signatures

Program crash

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\WerFault.exe C:\Windows\SysWOW64\rundll32.exe

System Location Discovery: System Language Discovery

discovery
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\rundll32.exe N/A

Processes

C:\Windows\system32\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\$PLUGINSDIR\System.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\$PLUGINSDIR\System.dll,#1

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 1928 -s 220

Network

N/A

Files

N/A

Analysis: behavioral4

Detonation Overview

Submitted

2024-11-19 05:20

Reported

2024-11-19 05:22

Platform

win10v2004-20241007-en

Max time kernel

150s

Max time network

152s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\$PLUGINSDIR\System.dll,#1

Signatures

Program crash

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\WerFault.exe C:\Windows\SysWOW64\rundll32.exe

System Location Discovery: System Language Discovery

discovery
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\rundll32.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1596 wrote to memory of 3504 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1596 wrote to memory of 3504 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1596 wrote to memory of 3504 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe

Processes

C:\Windows\system32\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\$PLUGINSDIR\System.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\$PLUGINSDIR\System.dll,#1

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 3504 -ip 3504

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 3504 -s 612

Network

Country Destination Domain Proto
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 154.239.44.20.in-addr.arpa udp
US 8.8.8.8:53 134.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 217.106.137.52.in-addr.arpa udp
US 8.8.8.8:53 53.210.109.20.in-addr.arpa udp
US 8.8.8.8:53 206.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 65.139.73.23.in-addr.arpa udp
US 8.8.8.8:53 172.214.232.199.in-addr.arpa udp
US 8.8.8.8:53 13.227.111.52.in-addr.arpa udp
US 8.8.8.8:53 udp

Files

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-11-19 05:20

Reported

2024-11-19 05:22

Platform

win7-20241010-en

Max time kernel

121s

Max time network

123s

Command Line

"C:\Users\Admin\AppData\Local\Temp\Korrekturlsning.exe"

Signatures

Guloader family

guloader

Guloader,Cloudeye

downloader guloader

VIPKeylogger

stealer keylogger vipkeylogger

Vipkeylogger family

vipkeylogger

Loads dropped DLL

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\Korrekturlsning.exe N/A

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-2039016743-699959520-214465309-1000\Software\Microsoft\Windows\CurrentVersion\RunOnce\Rytmiserendes = "C:\\Users\\Admin\\AppData\\Local\\Temp\\nonconsumption\\Oraklerne100.exe" C:\Users\Admin\AppData\Local\Temp\Korrekturlsning.exe N/A

Looks up external IP address via web service

Description Indicator Process Target
N/A checkip.dyndns.org N/A N/A

Suspicious use of NtCreateThreadExHideFromDebugger

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\Korrekturlsning.exe N/A

Suspicious use of NtSetInformationThreadHideFromDebugger

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\Korrekturlsning.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\Korrekturlsning.exe N/A

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 576 set thread context of 2520 N/A C:\Users\Admin\AppData\Local\Temp\Korrekturlsning.exe C:\Users\Admin\AppData\Local\Temp\Korrekturlsning.exe

Drops file in Windows directory

Description Indicator Process Target
File opened for modification C:\Windows\resources\0409\slnger\barometerstandenes.san C:\Users\Admin\AppData\Local\Temp\Korrekturlsning.exe N/A

Enumerates physical storage devices

System Location Discovery: System Language Discovery

discovery
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\Korrekturlsning.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\Korrekturlsning.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\Korrekturlsning.exe N/A

Suspicious behavior: MapViewOfSection

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\Korrekturlsning.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\Korrekturlsning.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\Korrekturlsning.exe

"C:\Users\Admin\AppData\Local\Temp\Korrekturlsning.exe"

C:\Users\Admin\AppData\Local\Temp\Korrekturlsning.exe

"C:\Users\Admin\AppData\Local\Temp\Korrekturlsning.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 mertvinc.com.tr udp
TR 185.244.144.68:80 mertvinc.com.tr tcp
US 8.8.8.8:53 checkip.dyndns.org udp
US 158.101.44.242:80 checkip.dyndns.org tcp
US 8.8.8.8:53 reallyfreegeoip.org udp
US 104.21.67.152:443 reallyfreegeoip.org tcp
US 8.8.8.8:53 api.telegram.org udp
NL 149.154.167.220:443 api.telegram.org tcp

Files

\Users\Admin\AppData\Local\Temp\nsyD4CD.tmp\System.dll

MD5 75ed96254fbf894e42058062b4b4f0d1
SHA1 996503f1383b49021eb3427bc28d13b5bbd11977
SHA256 a632d74332b3f08f834c732a103dafeb09a540823a2217ca7f49159755e8f1d7
SHA512 58174896db81d481947b8745dafe3a02c150f3938bb4543256e8cce1145154e016d481df9fe68dac6d48407c62cbe20753320ebd5fe5e84806d07ce78e0eb0c4

memory/576-9-0x00000000031B0000-0x000000000587E000-memory.dmp

memory/576-10-0x0000000077811000-0x0000000077912000-memory.dmp

memory/576-11-0x0000000077810000-0x00000000779B9000-memory.dmp

memory/2520-13-0x0000000077810000-0x00000000779B9000-memory.dmp

memory/576-12-0x00000000031B0000-0x000000000587E000-memory.dmp

memory/2520-15-0x00000000007E0000-0x0000000001842000-memory.dmp

memory/2520-16-0x00000000007E0000-0x0000000001842000-memory.dmp

memory/2520-17-0x00000000007E0000-0x000000000082A000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-11-19 05:20

Reported

2024-11-19 05:22

Platform

win10v2004-20241007-en

Max time kernel

146s

Max time network

146s

Command Line

"C:\Users\Admin\AppData\Local\Temp\Korrekturlsning.exe"

Signatures

Guloader family

guloader

Guloader,Cloudeye

downloader guloader

VIPKeylogger

stealer keylogger vipkeylogger

Vipkeylogger family

vipkeylogger

Loads dropped DLL

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\Korrekturlsning.exe N/A

Reads user/profile data of local email clients

spyware stealer

Reads user/profile data of web browsers

spyware stealer

Accesses Microsoft Outlook profiles

collection
Description Indicator Process Target
Key opened \REGISTRY\USER\S-1-5-21-940901362-3608833189-1915618603-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 C:\Users\Admin\AppData\Local\Temp\Korrekturlsning.exe N/A
Key opened \REGISTRY\USER\S-1-5-21-940901362-3608833189-1915618603-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 C:\Users\Admin\AppData\Local\Temp\Korrekturlsning.exe N/A
Key opened \REGISTRY\USER\S-1-5-21-940901362-3608833189-1915618603-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 C:\Users\Admin\AppData\Local\Temp\Korrekturlsning.exe N/A

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-940901362-3608833189-1915618603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce\Rytmiserendes = "C:\\Users\\Admin\\AppData\\Local\\Temp\\nonconsumption\\Oraklerne100.exe" C:\Users\Admin\AppData\Local\Temp\Korrekturlsning.exe N/A

Looks up external IP address via web service

Description Indicator Process Target
N/A checkip.dyndns.org N/A N/A

Suspicious use of NtCreateThreadExHideFromDebugger

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\Korrekturlsning.exe N/A

Suspicious use of NtSetInformationThreadHideFromDebugger

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\Korrekturlsning.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\Korrekturlsning.exe N/A

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 4820 set thread context of 740 N/A C:\Users\Admin\AppData\Local\Temp\Korrekturlsning.exe C:\Users\Admin\AppData\Local\Temp\Korrekturlsning.exe

Drops file in Windows directory

Description Indicator Process Target
File opened for modification C:\Windows\resources\0409\slnger\barometerstandenes.san C:\Users\Admin\AppData\Local\Temp\Korrekturlsning.exe N/A

Browser Information Discovery

discovery

Enumerates physical storage devices

System Location Discovery: System Language Discovery

discovery
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\Korrekturlsning.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\Korrekturlsning.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\Korrekturlsning.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\Korrekturlsning.exe N/A

Suspicious behavior: MapViewOfSection

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\Korrekturlsning.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\Korrekturlsning.exe N/A

outlook_office_path

Description Indicator Process Target
Key opened \REGISTRY\USER\S-1-5-21-940901362-3608833189-1915618603-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 C:\Users\Admin\AppData\Local\Temp\Korrekturlsning.exe N/A

outlook_win_path

Description Indicator Process Target
Key opened \REGISTRY\USER\S-1-5-21-940901362-3608833189-1915618603-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 C:\Users\Admin\AppData\Local\Temp\Korrekturlsning.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\Korrekturlsning.exe

"C:\Users\Admin\AppData\Local\Temp\Korrekturlsning.exe"

C:\Users\Admin\AppData\Local\Temp\Korrekturlsning.exe

"C:\Users\Admin\AppData\Local\Temp\Korrekturlsning.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 232.168.11.51.in-addr.arpa udp
US 8.8.8.8:53 172.214.232.199.in-addr.arpa udp
US 8.8.8.8:53 133.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 mertvinc.com.tr udp
TR 185.244.144.68:80 mertvinc.com.tr tcp
US 8.8.8.8:53 checkip.dyndns.org udp
BR 132.226.247.73:80 checkip.dyndns.org tcp
US 8.8.8.8:53 68.144.244.185.in-addr.arpa udp
US 8.8.8.8:53 reallyfreegeoip.org udp
US 104.21.67.152:443 reallyfreegeoip.org tcp
US 8.8.8.8:53 152.67.21.104.in-addr.arpa udp
US 8.8.8.8:53 73.247.226.132.in-addr.arpa udp
US 8.8.8.8:53 api.telegram.org udp
NL 149.154.167.220:443 api.telegram.org tcp
US 8.8.8.8:53 220.167.154.149.in-addr.arpa udp
US 8.8.8.8:53 200.163.202.172.in-addr.arpa udp
US 8.8.8.8:53 206.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 22.236.111.52.in-addr.arpa udp

Files

C:\Users\Admin\AppData\Local\Temp\nsh8C14.tmp\System.dll

MD5 75ed96254fbf894e42058062b4b4f0d1
SHA1 996503f1383b49021eb3427bc28d13b5bbd11977
SHA256 a632d74332b3f08f834c732a103dafeb09a540823a2217ca7f49159755e8f1d7
SHA512 58174896db81d481947b8745dafe3a02c150f3938bb4543256e8cce1145154e016d481df9fe68dac6d48407c62cbe20753320ebd5fe5e84806d07ce78e0eb0c4

memory/4820-8-0x0000000002DF0000-0x00000000054BE000-memory.dmp

memory/4820-9-0x00000000779A1000-0x0000000077AC1000-memory.dmp

memory/4820-10-0x0000000074694000-0x0000000074695000-memory.dmp

memory/4820-11-0x0000000002DF0000-0x00000000054BE000-memory.dmp

memory/740-12-0x0000000001A40000-0x000000000410E000-memory.dmp

memory/740-14-0x00000000007E0000-0x0000000001A34000-memory.dmp

memory/740-15-0x00000000007E0000-0x0000000001A34000-memory.dmp

memory/740-16-0x00000000007E0000-0x000000000082A000-memory.dmp

memory/740-17-0x0000000036B40000-0x00000000370E4000-memory.dmp

memory/740-18-0x0000000037130000-0x00000000371CC000-memory.dmp

memory/740-19-0x0000000001A40000-0x000000000410E000-memory.dmp

memory/740-20-0x00000000378B0000-0x0000000037A72000-memory.dmp

memory/740-21-0x0000000037AA0000-0x0000000037AF0000-memory.dmp

memory/740-22-0x0000000037B80000-0x00000000380AC000-memory.dmp

memory/740-26-0x0000000038100000-0x0000000038192000-memory.dmp

memory/740-27-0x00000000381F0000-0x00000000381FA000-memory.dmp