Malware Analysis Report

2024-11-15 09:59

Sample ID 241111-cmkynazjht
Target 25e63b30d14cfb8e34d5223ad2d2eee2d684603b5e74b91fdecd2ff9b8945066.exe
SHA256 25e63b30d14cfb8e34d5223ad2d2eee2d684603b5e74b91fdecd2ff9b8945066
Tags
guloader discovery downloader vipkeylogger keylogger stealer
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral3

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral4

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

25e63b30d14cfb8e34d5223ad2d2eee2d684603b5e74b91fdecd2ff9b8945066

Threat Level: Known bad

The file 25e63b30d14cfb8e34d5223ad2d2eee2d684603b5e74b91fdecd2ff9b8945066.exe was found to be: Known bad.

Malicious Activity Summary

guloader discovery downloader vipkeylogger keylogger stealer

VIPKeylogger

Vipkeylogger family

Guloader,Cloudeye

Guloader family

Loads dropped DLL

Looks up external IP address via web service

Suspicious use of NtCreateThreadExHideFromDebugger

Drops file in System32 directory

Suspicious use of NtSetInformationThreadHideFromDebugger

Suspicious use of SetThreadContext

Drops file in Windows directory

Program crash

Unsigned PE

Enumerates physical storage devices

System Location Discovery: System Language Discovery

Suspicious behavior: EnumeratesProcesses

Suspicious use of WriteProcessMemory

Suspicious behavior: MapViewOfSection

Suspicious use of AdjustPrivilegeToken

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-11-11 02:11

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-11-11 02:11

Reported

2024-11-11 02:14

Platform

win7-20240708-en

Max time kernel

146s

Max time network

148s

Command Line

"C:\Users\Admin\AppData\Local\Temp\25e63b30d14cfb8e34d5223ad2d2eee2d684603b5e74b91fdecd2ff9b8945066.exe"

Signatures

Guloader family

guloader

Guloader,Cloudeye

downloader guloader

Drops file in System32 directory

Description Indicator Process Target
File opened for modification C:\Windows\SysWOW64\diskussionsklubbens.ini C:\Users\Admin\AppData\Local\Temp\25e63b30d14cfb8e34d5223ad2d2eee2d684603b5e74b91fdecd2ff9b8945066.exe N/A

Drops file in Windows directory

Description Indicator Process Target
File opened for modification C:\Windows\resources\0409\mooktar\julekaktussers.ini C:\Users\Admin\AppData\Local\Temp\25e63b30d14cfb8e34d5223ad2d2eee2d684603b5e74b91fdecd2ff9b8945066.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\25e63b30d14cfb8e34d5223ad2d2eee2d684603b5e74b91fdecd2ff9b8945066.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\25e63b30d14cfb8e34d5223ad2d2eee2d684603b5e74b91fdecd2ff9b8945066.exe N/A

Suspicious behavior: MapViewOfSection

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\25e63b30d14cfb8e34d5223ad2d2eee2d684603b5e74b91fdecd2ff9b8945066.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2644 wrote to memory of 2760 N/A C:\Users\Admin\AppData\Local\Temp\25e63b30d14cfb8e34d5223ad2d2eee2d684603b5e74b91fdecd2ff9b8945066.exe C:\Users\Admin\AppData\Local\Temp\25e63b30d14cfb8e34d5223ad2d2eee2d684603b5e74b91fdecd2ff9b8945066.exe
PID 2644 wrote to memory of 2760 N/A C:\Users\Admin\AppData\Local\Temp\25e63b30d14cfb8e34d5223ad2d2eee2d684603b5e74b91fdecd2ff9b8945066.exe C:\Users\Admin\AppData\Local\Temp\25e63b30d14cfb8e34d5223ad2d2eee2d684603b5e74b91fdecd2ff9b8945066.exe
PID 2644 wrote to memory of 2760 N/A C:\Users\Admin\AppData\Local\Temp\25e63b30d14cfb8e34d5223ad2d2eee2d684603b5e74b91fdecd2ff9b8945066.exe C:\Users\Admin\AppData\Local\Temp\25e63b30d14cfb8e34d5223ad2d2eee2d684603b5e74b91fdecd2ff9b8945066.exe
PID 2644 wrote to memory of 2760 N/A C:\Users\Admin\AppData\Local\Temp\25e63b30d14cfb8e34d5223ad2d2eee2d684603b5e74b91fdecd2ff9b8945066.exe C:\Users\Admin\AppData\Local\Temp\25e63b30d14cfb8e34d5223ad2d2eee2d684603b5e74b91fdecd2ff9b8945066.exe
PID 2644 wrote to memory of 2760 N/A C:\Users\Admin\AppData\Local\Temp\25e63b30d14cfb8e34d5223ad2d2eee2d684603b5e74b91fdecd2ff9b8945066.exe C:\Users\Admin\AppData\Local\Temp\25e63b30d14cfb8e34d5223ad2d2eee2d684603b5e74b91fdecd2ff9b8945066.exe
PID 2644 wrote to memory of 2760 N/A C:\Users\Admin\AppData\Local\Temp\25e63b30d14cfb8e34d5223ad2d2eee2d684603b5e74b91fdecd2ff9b8945066.exe C:\Users\Admin\AppData\Local\Temp\25e63b30d14cfb8e34d5223ad2d2eee2d684603b5e74b91fdecd2ff9b8945066.exe

Processes

C:\Users\Admin\AppData\Local\Temp\25e63b30d14cfb8e34d5223ad2d2eee2d684603b5e74b91fdecd2ff9b8945066.exe

"C:\Users\Admin\AppData\Local\Temp\25e63b30d14cfb8e34d5223ad2d2eee2d684603b5e74b91fdecd2ff9b8945066.exe"

C:\Users\Admin\AppData\Local\Temp\25e63b30d14cfb8e34d5223ad2d2eee2d684603b5e74b91fdecd2ff9b8945066.exe

"C:\Users\Admin\AppData\Local\Temp\25e63b30d14cfb8e34d5223ad2d2eee2d684603b5e74b91fdecd2ff9b8945066.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 api.onedrive.com udp
US 13.107.42.12:443 api.onedrive.com tcp
US 13.107.42.12:443 api.onedrive.com tcp
US 13.107.42.12:443 api.onedrive.com tcp
US 13.107.42.12:443 api.onedrive.com tcp
US 13.107.42.12:443 api.onedrive.com tcp
US 13.107.42.12:443 api.onedrive.com tcp
US 13.107.42.12:443 api.onedrive.com tcp
US 13.107.42.12:443 api.onedrive.com tcp
US 13.107.42.12:443 api.onedrive.com tcp
US 13.107.42.12:443 api.onedrive.com tcp
US 13.107.42.12:443 api.onedrive.com tcp
US 13.107.42.12:443 api.onedrive.com tcp
US 13.107.42.12:443 api.onedrive.com tcp
US 13.107.42.12:443 api.onedrive.com tcp

Files

\Users\Admin\AppData\Local\Temp\nse427.tmp\System.dll

MD5 564bb0373067e1785cba7e4c24aab4bf
SHA1 7c9416a01d821b10b2eef97b80899d24014d6fc1
SHA256 7a9ddee34562cd3703f1502b5c70e99cd5bba15de2b6845a3555033d7f6cb2a5
SHA512 22c61a323cb9293d7ec5c7e7e60674d0e2f7b29d55be25eb3c128ea2cd7440a1400cee17c43896b996278007c0d247f331a9b8964e3a40a0eb1404a9596c4472

memory/2644-13-0x0000000003780000-0x0000000004392000-memory.dmp

memory/2644-14-0x0000000077A51000-0x0000000077B52000-memory.dmp

memory/2644-15-0x0000000077A50000-0x0000000077BF9000-memory.dmp

memory/2760-17-0x0000000077A50000-0x0000000077BF9000-memory.dmp

memory/2644-16-0x0000000003780000-0x0000000004392000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\Cab2C7F.tmp

MD5 49aebf8cbd62d92ac215b2923fb1b9f5
SHA1 1723be06719828dda65ad804298d0431f6aff976
SHA256 b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f
SHA512 bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b

C:\Users\Admin\AppData\Local\Temp\Tar2CA1.tmp

MD5 4ea6026cf93ec6338144661bf1202cd1
SHA1 a1dec9044f750ad887935a01430bf49322fbdcb7
SHA256 8efbc21559ef8b1bcf526800d8070baad42474ce7198e26fa771dbb41a76b1d8
SHA512 6c7e0980e39aacf4c3689802353f464a08cd17753bd210ee997e5f2a455deb4f287a9ef74d84579dbde49bc96213cd2b8b247723919c412ea980aa6e6bfe218b

memory/2760-70-0x0000000000460000-0x00000000014C2000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-11-11 02:11

Reported

2024-11-11 02:14

Platform

win10v2004-20241007-en

Max time kernel

149s

Max time network

153s

Command Line

"C:\Users\Admin\AppData\Local\Temp\25e63b30d14cfb8e34d5223ad2d2eee2d684603b5e74b91fdecd2ff9b8945066.exe"

Signatures

Guloader family

guloader

Guloader,Cloudeye

downloader guloader

VIPKeylogger

stealer keylogger vipkeylogger

Vipkeylogger family

vipkeylogger

Looks up external IP address via web service

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

Drops file in System32 directory

Description Indicator Process Target
File opened for modification C:\Windows\SysWOW64\diskussionsklubbens.ini C:\Users\Admin\AppData\Local\Temp\25e63b30d14cfb8e34d5223ad2d2eee2d684603b5e74b91fdecd2ff9b8945066.exe N/A

Suspicious use of NtCreateThreadExHideFromDebugger

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\25e63b30d14cfb8e34d5223ad2d2eee2d684603b5e74b91fdecd2ff9b8945066.exe N/A

Drops file in Windows directory

Description Indicator Process Target
File opened for modification C:\Windows\resources\0409\mooktar\julekaktussers.ini C:\Users\Admin\AppData\Local\Temp\25e63b30d14cfb8e34d5223ad2d2eee2d684603b5e74b91fdecd2ff9b8945066.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\25e63b30d14cfb8e34d5223ad2d2eee2d684603b5e74b91fdecd2ff9b8945066.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\25e63b30d14cfb8e34d5223ad2d2eee2d684603b5e74b91fdecd2ff9b8945066.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\25e63b30d14cfb8e34d5223ad2d2eee2d684603b5e74b91fdecd2ff9b8945066.exe N/A

Suspicious behavior: MapViewOfSection

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\25e63b30d14cfb8e34d5223ad2d2eee2d684603b5e74b91fdecd2ff9b8945066.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\25e63b30d14cfb8e34d5223ad2d2eee2d684603b5e74b91fdecd2ff9b8945066.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\25e63b30d14cfb8e34d5223ad2d2eee2d684603b5e74b91fdecd2ff9b8945066.exe

"C:\Users\Admin\AppData\Local\Temp\25e63b30d14cfb8e34d5223ad2d2eee2d684603b5e74b91fdecd2ff9b8945066.exe"

C:\Users\Admin\AppData\Local\Temp\25e63b30d14cfb8e34d5223ad2d2eee2d684603b5e74b91fdecd2ff9b8945066.exe

"C:\Users\Admin\AppData\Local\Temp\25e63b30d14cfb8e34d5223ad2d2eee2d684603b5e74b91fdecd2ff9b8945066.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 424 -p 4640 -ip 4640

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 4640 -s 2268

Network

Country Destination Domain Proto
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 209.205.72.20.in-addr.arpa udp
US 8.8.8.8:53 83.210.23.2.in-addr.arpa udp
US 8.8.8.8:53 76.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 api.onedrive.com udp
US 13.107.42.12:443 api.onedrive.com tcp
US 8.8.8.8:53 12.42.107.13.in-addr.arpa udp
US 8.8.8.8:53 gciyqg.dm.files.1drv.com udp
US 13.107.42.12:443 gciyqg.dm.files.1drv.com tcp
US 8.8.8.8:53 58.55.71.13.in-addr.arpa udp
US 8.8.8.8:53 checkip.dyndns.org udp
US 158.101.44.242:80 checkip.dyndns.org tcp
US 8.8.8.8:53 242.44.101.158.in-addr.arpa udp
US 8.8.8.8:53 50.23.12.20.in-addr.arpa udp
US 8.8.8.8:53 206.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 240.221.184.93.in-addr.arpa udp
US 8.8.8.8:53 172.214.232.199.in-addr.arpa udp
US 8.8.8.8:53 29.243.111.52.in-addr.arpa udp
US 8.8.8.8:53 17.173.189.20.in-addr.arpa udp

Files

C:\Users\Admin\AppData\Local\Temp\nsf93E4.tmp\System.dll

MD5 564bb0373067e1785cba7e4c24aab4bf
SHA1 7c9416a01d821b10b2eef97b80899d24014d6fc1
SHA256 7a9ddee34562cd3703f1502b5c70e99cd5bba15de2b6845a3555033d7f6cb2a5
SHA512 22c61a323cb9293d7ec5c7e7e60674d0e2f7b29d55be25eb3c128ea2cd7440a1400cee17c43896b996278007c0d247f331a9b8964e3a40a0eb1404a9596c4472

memory/2452-12-0x0000000003280000-0x0000000003E92000-memory.dmp

memory/2452-13-0x00000000777A1000-0x00000000778C1000-memory.dmp

memory/2452-14-0x0000000074495000-0x0000000074496000-memory.dmp

memory/2452-15-0x0000000003280000-0x0000000003E92000-memory.dmp

memory/4640-16-0x00000000016C0000-0x00000000022D2000-memory.dmp

memory/4640-17-0x0000000077828000-0x0000000077829000-memory.dmp

memory/4640-18-0x0000000077845000-0x0000000077846000-memory.dmp

memory/4640-24-0x00000000777A1000-0x00000000778C1000-memory.dmp

memory/4640-23-0x00000000016C0000-0x00000000022D2000-memory.dmp

memory/4640-22-0x0000000000460000-0x00000000016B4000-memory.dmp

memory/4640-25-0x0000000000460000-0x00000000004AA000-memory.dmp

memory/4640-26-0x0000000034F50000-0x00000000354F4000-memory.dmp

memory/4640-27-0x0000000032BD0000-0x0000000032C6C000-memory.dmp

memory/4640-29-0x00000000777A1000-0x00000000778C1000-memory.dmp

memory/4640-30-0x00000000016C0000-0x00000000022D2000-memory.dmp

Analysis: behavioral3

Detonation Overview

Submitted

2024-11-11 02:11

Reported

2024-11-11 02:14

Platform

win7-20241010-en

Max time kernel

73s

Max time network

19s

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 2044 -s 224

Network

N/A

Files

N/A

Analysis: behavioral4

Detonation Overview

Submitted

2024-11-11 02:11

Reported

2024-11-11 02:14

Platform

win10v2004-20241007-en

Max time kernel

93s

Max time network

141s

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 3300 wrote to memory of 3936 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 3300 wrote to memory of 3936 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 3300 wrote to memory of 3936 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 3936 -ip 3936

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 3936 -s 612

Network

Country Destination Domain Proto
US 8.8.8.8:53 154.239.44.20.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 8.8.8.8:53 209.205.72.20.in-addr.arpa udp
US 8.8.8.8:53 104.219.191.52.in-addr.arpa udp
US 8.8.8.8:53 18.31.95.13.in-addr.arpa udp
US 8.8.8.8:53 50.23.12.20.in-addr.arpa udp
US 8.8.8.8:53 240.221.184.93.in-addr.arpa udp
US 8.8.8.8:53 22.236.111.52.in-addr.arpa udp

Files

N/A