Malware Analysis Report

2025-05-28 18:51

Sample ID 250111-ffvq3axmbl
Target ad1dfc910b1815aea7983124549d2c04376db9b2249b99e3e672b91df91bfec6.exe
SHA256 ad1dfc910b1815aea7983124549d2c04376db9b2249b99e3e672b91df91bfec6
Tags
discovery guloader downloader
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

Analysis: static1

Detonation Overview

Signatures

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: behavioral3

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

ad1dfc910b1815aea7983124549d2c04376db9b2249b99e3e672b91df91bfec6

Threat Level: Known bad

The file ad1dfc910b1815aea7983124549d2c04376db9b2249b99e3e672b91df91bfec6.exe was found to be: Known bad.

Malicious Activity Summary

discovery guloader downloader

Guloader family

Guloader,Cloudeye

Loads dropped DLL

Legitimate hosting services abused for malware hosting/C2

Suspicious use of NtSetInformationThreadHideFromDebugger

Suspicious use of SetThreadContext

Drops file in Windows directory

Enumerates physical storage devices

Unsigned PE

Program crash

System Location Discovery: System Language Discovery

NSIS installer

Suspicious behavior: MapViewOfSection

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2025-01-11 04:49

Signatures

Unsigned PE

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

NSIS installer

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

Analysis: behavioral4

Detonation Overview

Submitted

2025-01-11 04:49

Reported

2025-01-11 04:51

Platform

win10v2004-20241007-en

Max time kernel

95s

Max time network

137s

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 3432 wrote to memory of 4016 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 3432 wrote to memory of 4016 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 3432 wrote to memory of 4016 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 456 -p 4016 -ip 4016

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 4016 -s 612

Network

Country Destination Domain Proto
US 8.8.8.8:53 232.168.11.51.in-addr.arpa udp
US 8.8.8.8:53 4.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.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 75.117.19.2.in-addr.arpa udp
US 8.8.8.8:53 180.129.81.91.in-addr.arpa udp
US 8.8.8.8:53 21.236.111.52.in-addr.arpa udp

Files

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2025-01-11 04:49

Reported

2025-01-11 04:51

Platform

win7-20241010-en

Max time kernel

144s

Max time network

146s

Command Line

"C:\Users\Admin\AppData\Local\Temp\ad1dfc910b1815aea7983124549d2c04376db9b2249b99e3e672b91df91bfec6.exe"

Signatures

Guloader family

guloader

Guloader,Cloudeye

downloader guloader

Legitimate hosting services abused for malware hosting/C2

Description Indicator Process Target
N/A drive.google.com N/A N/A
N/A drive.google.com N/A N/A

Drops file in Windows directory

Description Indicator Process Target
File created C:\Windows\Arder.lnk C:\Users\Admin\AppData\Local\Temp\ad1dfc910b1815aea7983124549d2c04376db9b2249b99e3e672b91df91bfec6.exe N/A
File opened for modification C:\Windows\resources\0409\figenkaktusses\Ea40.ini C:\Users\Admin\AppData\Local\Temp\ad1dfc910b1815aea7983124549d2c04376db9b2249b99e3e672b91df91bfec6.exe N/A
File opened for modification C:\Windows\Fonts\heraclitic.Wom C:\Users\Admin\AppData\Local\Temp\ad1dfc910b1815aea7983124549d2c04376db9b2249b99e3e672b91df91bfec6.exe N/A
File opened for modification C:\Windows\storsejlenes\blackweed.hor C:\Users\Admin\AppData\Local\Temp\ad1dfc910b1815aea7983124549d2c04376db9b2249b99e3e672b91df91bfec6.exe N/A
File opened for modification C:\Windows\Arder.lnk C:\Users\Admin\AppData\Local\Temp\ad1dfc910b1815aea7983124549d2c04376db9b2249b99e3e672b91df91bfec6.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\ad1dfc910b1815aea7983124549d2c04376db9b2249b99e3e672b91df91bfec6.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\ad1dfc910b1815aea7983124549d2c04376db9b2249b99e3e672b91df91bfec6.exe N/A

Suspicious behavior: MapViewOfSection

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\ad1dfc910b1815aea7983124549d2c04376db9b2249b99e3e672b91df91bfec6.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1740 wrote to memory of 2428 N/A C:\Users\Admin\AppData\Local\Temp\ad1dfc910b1815aea7983124549d2c04376db9b2249b99e3e672b91df91bfec6.exe C:\Users\Admin\AppData\Local\Temp\ad1dfc910b1815aea7983124549d2c04376db9b2249b99e3e672b91df91bfec6.exe
PID 1740 wrote to memory of 2428 N/A C:\Users\Admin\AppData\Local\Temp\ad1dfc910b1815aea7983124549d2c04376db9b2249b99e3e672b91df91bfec6.exe C:\Users\Admin\AppData\Local\Temp\ad1dfc910b1815aea7983124549d2c04376db9b2249b99e3e672b91df91bfec6.exe
PID 1740 wrote to memory of 2428 N/A C:\Users\Admin\AppData\Local\Temp\ad1dfc910b1815aea7983124549d2c04376db9b2249b99e3e672b91df91bfec6.exe C:\Users\Admin\AppData\Local\Temp\ad1dfc910b1815aea7983124549d2c04376db9b2249b99e3e672b91df91bfec6.exe
PID 1740 wrote to memory of 2428 N/A C:\Users\Admin\AppData\Local\Temp\ad1dfc910b1815aea7983124549d2c04376db9b2249b99e3e672b91df91bfec6.exe C:\Users\Admin\AppData\Local\Temp\ad1dfc910b1815aea7983124549d2c04376db9b2249b99e3e672b91df91bfec6.exe
PID 1740 wrote to memory of 2428 N/A C:\Users\Admin\AppData\Local\Temp\ad1dfc910b1815aea7983124549d2c04376db9b2249b99e3e672b91df91bfec6.exe C:\Users\Admin\AppData\Local\Temp\ad1dfc910b1815aea7983124549d2c04376db9b2249b99e3e672b91df91bfec6.exe
PID 1740 wrote to memory of 2428 N/A C:\Users\Admin\AppData\Local\Temp\ad1dfc910b1815aea7983124549d2c04376db9b2249b99e3e672b91df91bfec6.exe C:\Users\Admin\AppData\Local\Temp\ad1dfc910b1815aea7983124549d2c04376db9b2249b99e3e672b91df91bfec6.exe

Processes

C:\Users\Admin\AppData\Local\Temp\ad1dfc910b1815aea7983124549d2c04376db9b2249b99e3e672b91df91bfec6.exe

"C:\Users\Admin\AppData\Local\Temp\ad1dfc910b1815aea7983124549d2c04376db9b2249b99e3e672b91df91bfec6.exe"

C:\Users\Admin\AppData\Local\Temp\ad1dfc910b1815aea7983124549d2c04376db9b2249b99e3e672b91df91bfec6.exe

"C:\Users\Admin\AppData\Local\Temp\ad1dfc910b1815aea7983124549d2c04376db9b2249b99e3e672b91df91bfec6.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 drive.google.com udp
GB 142.250.179.238:443 drive.google.com tcp
US 8.8.8.8:53 c.pki.goog udp
GB 142.250.200.35:80 c.pki.goog tcp
US 8.8.8.8:53 o.pki.goog udp
GB 142.250.200.35:80 o.pki.goog tcp
US 8.8.8.8:53 drive.usercontent.google.com udp
GB 216.58.212.225:443 drive.usercontent.google.com tcp
US 8.8.8.8:53 www.microsoft.com udp
GB 95.100.245.144:80 www.microsoft.com tcp
US 8.8.8.8:53 crl.microsoft.com udp
GB 88.221.134.83:80 crl.microsoft.com tcp

Files

C:\Windows\Arder.lnk

MD5 200c1a59b30141625f069f6328d20924
SHA1 691cd95853894e5c0fd74b77897941e26ca71374
SHA256 12ca596fce6f1dda25e8ea902e29e4e96c5ffe8f424c2fa47ff904476656e1c9
SHA512 a387538688bfd0a5bae9cc3aa3007952f618f91b90b11066e2450d939e04cfebf51f534d13dacd91c390a1171574d1257c3b09539d2b1866b6086ce1365c50e0

\Users\Admin\AppData\Local\Temp\nsy9213.tmp\System.dll

MD5 34442e1e0c2870341df55e1b7b3cccdc
SHA1 99b2fa21aead4b6ccd8ff2f6d3d3453a51d9c70c
SHA256 269d232712c86983336badb40b9e55e80052d8389ed095ebf9214964d43b6bb1
SHA512 4a8c57fb12997438b488b862f3fc9dc0f236e07bb47b2bce6053dcb03ac7ad171842f02ac749f02dda4719c681d186330524cd2953d33cb50854844e74b33d51

memory/1740-280-0x0000000002F50000-0x0000000004509000-memory.dmp

memory/1740-281-0x0000000076D71000-0x0000000076E72000-memory.dmp

memory/1740-282-0x0000000076D70000-0x0000000076F19000-memory.dmp

memory/1740-283-0x0000000002F50000-0x0000000004509000-memory.dmp

memory/2428-284-0x0000000000400000-0x0000000001462000-memory.dmp

memory/2428-285-0x0000000076D70000-0x0000000076F19000-memory.dmp

memory/2428-306-0x0000000000400000-0x0000000001462000-memory.dmp

memory/1740-318-0x0000000002F50000-0x0000000004509000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2025-01-11 04:49

Reported

2025-01-11 04:51

Platform

win10v2004-20241007-en

Max time kernel

140s

Max time network

151s

Command Line

"C:\Users\Admin\AppData\Local\Temp\ad1dfc910b1815aea7983124549d2c04376db9b2249b99e3e672b91df91bfec6.exe"

Signatures

Guloader family

guloader

Guloader,Cloudeye

downloader guloader

Legitimate hosting services abused for malware hosting/C2

Description Indicator Process Target
N/A drive.google.com N/A N/A
N/A drive.google.com N/A N/A

Drops file in Windows directory

Description Indicator Process Target
File opened for modification C:\Windows\storsejlenes\blackweed.hor C:\Users\Admin\AppData\Local\Temp\ad1dfc910b1815aea7983124549d2c04376db9b2249b99e3e672b91df91bfec6.exe N/A
File opened for modification C:\Windows\Arder.lnk C:\Users\Admin\AppData\Local\Temp\ad1dfc910b1815aea7983124549d2c04376db9b2249b99e3e672b91df91bfec6.exe N/A
File created C:\Windows\Arder.lnk C:\Users\Admin\AppData\Local\Temp\ad1dfc910b1815aea7983124549d2c04376db9b2249b99e3e672b91df91bfec6.exe N/A
File opened for modification C:\Windows\resources\0409\figenkaktusses\Ea40.ini C:\Users\Admin\AppData\Local\Temp\ad1dfc910b1815aea7983124549d2c04376db9b2249b99e3e672b91df91bfec6.exe N/A
File opened for modification C:\Windows\Fonts\heraclitic.Wom C:\Users\Admin\AppData\Local\Temp\ad1dfc910b1815aea7983124549d2c04376db9b2249b99e3e672b91df91bfec6.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\ad1dfc910b1815aea7983124549d2c04376db9b2249b99e3e672b91df91bfec6.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\ad1dfc910b1815aea7983124549d2c04376db9b2249b99e3e672b91df91bfec6.exe N/A

Suspicious behavior: MapViewOfSection

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\ad1dfc910b1815aea7983124549d2c04376db9b2249b99e3e672b91df91bfec6.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\ad1dfc910b1815aea7983124549d2c04376db9b2249b99e3e672b91df91bfec6.exe

"C:\Users\Admin\AppData\Local\Temp\ad1dfc910b1815aea7983124549d2c04376db9b2249b99e3e672b91df91bfec6.exe"

C:\Users\Admin\AppData\Local\Temp\ad1dfc910b1815aea7983124549d2c04376db9b2249b99e3e672b91df91bfec6.exe

"C:\Users\Admin\AppData\Local\Temp\ad1dfc910b1815aea7983124549d2c04376db9b2249b99e3e672b91df91bfec6.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 13.86.106.20.in-addr.arpa udp
US 8.8.8.8:53 172.214.232.199.in-addr.arpa udp
US 8.8.8.8:53 136.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 97.17.167.52.in-addr.arpa udp
US 8.8.8.8:53 drive.google.com udp
GB 142.250.179.238:443 drive.google.com tcp
US 8.8.8.8:53 c.pki.goog udp
GB 142.250.200.35:80 c.pki.goog tcp
US 8.8.8.8:53 o.pki.goog udp
GB 142.250.200.35:80 o.pki.goog tcp
US 8.8.8.8:53 238.179.250.142.in-addr.arpa udp
US 8.8.8.8:53 35.200.250.142.in-addr.arpa udp
US 8.8.8.8:53 drive.usercontent.google.com udp
GB 216.58.212.225:443 drive.usercontent.google.com tcp
US 8.8.8.8:53 225.212.58.216.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 21.236.111.52.in-addr.arpa udp

Files

C:\Windows\Arder.lnk

MD5 0f4bd53a63a7a4ed46df0f42a3d248ce
SHA1 875e1d20a386d7810e6befc7793054c357555fa8
SHA256 13752b5c6f1248c7fe42f8c1d11e8a8402034bbbd30168cfc5223446de5c7d59
SHA512 c18be80707390cf8c36912494a49eb209a7fdb2e8b6e8f35087e7fd17fe919fc436997a3fc83c1a51b10631cee158e273b919a63a1ccbd4ea92ddadaabf13633

C:\Users\Admin\AppData\Local\Temp\nsi8CFF.tmp\System.dll

MD5 34442e1e0c2870341df55e1b7b3cccdc
SHA1 99b2fa21aead4b6ccd8ff2f6d3d3453a51d9c70c
SHA256 269d232712c86983336badb40b9e55e80052d8389ed095ebf9214964d43b6bb1
SHA512 4a8c57fb12997438b488b862f3fc9dc0f236e07bb47b2bce6053dcb03ac7ad171842f02ac749f02dda4719c681d186330524cd2953d33cb50854844e74b33d51

memory/2824-279-0x0000000002AB0000-0x0000000004069000-memory.dmp

memory/2824-280-0x0000000077C61000-0x0000000077D81000-memory.dmp

memory/2824-282-0x0000000075104000-0x0000000075105000-memory.dmp

memory/2824-281-0x0000000002AB0000-0x0000000004069000-memory.dmp

memory/3444-283-0x0000000000400000-0x0000000001654000-memory.dmp

memory/3444-284-0x0000000001660000-0x0000000002C19000-memory.dmp

memory/3444-285-0x0000000077CE8000-0x0000000077CE9000-memory.dmp

memory/3444-286-0x0000000077D05000-0x0000000077D06000-memory.dmp

memory/3444-299-0x0000000001660000-0x0000000002C19000-memory.dmp

memory/3444-300-0x0000000000400000-0x0000000001654000-memory.dmp

memory/3444-301-0x0000000077C61000-0x0000000077D81000-memory.dmp

memory/2824-307-0x0000000002AB0000-0x0000000004069000-memory.dmp

Analysis: behavioral3

Detonation Overview

Submitted

2025-01-11 04:49

Reported

2025-01-11 04:52

Platform

win7-20241010-en

Max time kernel

118s

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 2204 -s 224

Network

N/A

Files

N/A