Malware Analysis Report

2024-10-18 23:09

Sample ID 240522-r87f4sfa53
Target d5c2c232447f0e59930b03dfb417815c61fa857d6ed61237554a947e598a08f1.exe
SHA256 d5c2c232447f0e59930b03dfb417815c61fa857d6ed61237554a947e598a08f1
Tags
guloader downloader
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

d5c2c232447f0e59930b03dfb417815c61fa857d6ed61237554a947e598a08f1

Threat Level: Known bad

The file d5c2c232447f0e59930b03dfb417815c61fa857d6ed61237554a947e598a08f1.exe was found to be: Known bad.

Malicious Activity Summary

guloader downloader

Guloader,Cloudeye

Loads dropped DLL

Legitimate hosting services abused for malware hosting/C2

Suspicious use of NtSetInformationThreadHideFromDebugger

Suspicious use of SetThreadContext

Drops file in System32 directory

Drops file in Windows directory

Drops file in Program Files directory

Program crash

Unsigned PE

Enumerates physical storage devices

NSIS installer

Suspicious behavior: MapViewOfSection

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-05-22 14:52

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: behavioral3

Detonation Overview

Submitted

2024-05-22 14:52

Reported

2024-05-22 14:55

Platform

win7-20240508-en

Max time kernel

122s

Max time network

125s

Command Line

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

Signatures

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 1332 -s 220

Network

N/A

Files

N/A

Analysis: behavioral4

Detonation Overview

Submitted

2024-05-22 14:52

Reported

2024-05-22 14:55

Platform

win10v2004-20240426-en

Max time kernel

145s

Max time network

135s

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

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1840 wrote to memory of 3980 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1840 wrote to memory of 3980 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1840 wrote to memory of 3980 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 428 -p 3980 -ip 3980

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 3980 -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 g.bing.com udp
US 204.79.197.237:443 g.bing.com tcp
US 8.8.8.8:53 237.197.79.204.in-addr.arpa udp
US 8.8.8.8:53 0.205.248.87.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 74.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 196.249.167.52.in-addr.arpa udp
NL 23.62.61.113:443 www.bing.com tcp
US 8.8.8.8:53 113.61.62.23.in-addr.arpa udp
NL 23.62.61.113:443 www.bing.com tcp
US 8.8.8.8:53 88.156.103.20.in-addr.arpa udp
US 8.8.8.8:53 58.55.71.13.in-addr.arpa udp
US 8.8.8.8:53 86.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 15.164.165.52.in-addr.arpa udp
US 8.8.8.8:53 99.58.20.217.in-addr.arpa udp
US 8.8.8.8:53 29.243.111.52.in-addr.arpa udp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 8.8.8.8:53 26.35.223.20.in-addr.arpa udp

Files

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-05-22 14:52

Reported

2024-05-22 14:55

Platform

win7-20240419-en

Max time kernel

149s

Max time network

151s

Command Line

"C:\Users\Admin\AppData\Local\Temp\d5c2c232447f0e59930b03dfb417815c61fa857d6ed61237554a947e598a08f1.exe"

Signatures

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 System32 directory

Description Indicator Process Target
File opened for modification C:\Windows\SysWOW64\Ranglesten\atriumgaardes.pla C:\Users\Admin\AppData\Local\Temp\d5c2c232447f0e59930b03dfb417815c61fa857d6ed61237554a947e598a08f1.exe N/A

Drops file in Program Files directory

Description Indicator Process Target
File opened for modification C:\Program Files (x86)\Common Files\senegas.sed C:\Users\Admin\AppData\Local\Temp\d5c2c232447f0e59930b03dfb417815c61fa857d6ed61237554a947e598a08f1.exe N/A

Drops file in Windows directory

Description Indicator Process Target
File opened for modification C:\Windows\resources\0409\bearlet.tor C:\Users\Admin\AppData\Local\Temp\d5c2c232447f0e59930b03dfb417815c61fa857d6ed61237554a947e598a08f1.exe N/A
File opened for modification C:\Windows\andenklasseskupeens\jordfyld.ini C:\Users\Admin\AppData\Local\Temp\d5c2c232447f0e59930b03dfb417815c61fa857d6ed61237554a947e598a08f1.exe N/A

Enumerates physical storage devices

Suspicious behavior: MapViewOfSection

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\d5c2c232447f0e59930b03dfb417815c61fa857d6ed61237554a947e598a08f1.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1736 wrote to memory of 2668 N/A C:\Users\Admin\AppData\Local\Temp\d5c2c232447f0e59930b03dfb417815c61fa857d6ed61237554a947e598a08f1.exe C:\Users\Admin\AppData\Local\Temp\d5c2c232447f0e59930b03dfb417815c61fa857d6ed61237554a947e598a08f1.exe
PID 1736 wrote to memory of 2668 N/A C:\Users\Admin\AppData\Local\Temp\d5c2c232447f0e59930b03dfb417815c61fa857d6ed61237554a947e598a08f1.exe C:\Users\Admin\AppData\Local\Temp\d5c2c232447f0e59930b03dfb417815c61fa857d6ed61237554a947e598a08f1.exe
PID 1736 wrote to memory of 2668 N/A C:\Users\Admin\AppData\Local\Temp\d5c2c232447f0e59930b03dfb417815c61fa857d6ed61237554a947e598a08f1.exe C:\Users\Admin\AppData\Local\Temp\d5c2c232447f0e59930b03dfb417815c61fa857d6ed61237554a947e598a08f1.exe
PID 1736 wrote to memory of 2668 N/A C:\Users\Admin\AppData\Local\Temp\d5c2c232447f0e59930b03dfb417815c61fa857d6ed61237554a947e598a08f1.exe C:\Users\Admin\AppData\Local\Temp\d5c2c232447f0e59930b03dfb417815c61fa857d6ed61237554a947e598a08f1.exe
PID 1736 wrote to memory of 2668 N/A C:\Users\Admin\AppData\Local\Temp\d5c2c232447f0e59930b03dfb417815c61fa857d6ed61237554a947e598a08f1.exe C:\Users\Admin\AppData\Local\Temp\d5c2c232447f0e59930b03dfb417815c61fa857d6ed61237554a947e598a08f1.exe
PID 1736 wrote to memory of 2668 N/A C:\Users\Admin\AppData\Local\Temp\d5c2c232447f0e59930b03dfb417815c61fa857d6ed61237554a947e598a08f1.exe C:\Users\Admin\AppData\Local\Temp\d5c2c232447f0e59930b03dfb417815c61fa857d6ed61237554a947e598a08f1.exe

Processes

C:\Users\Admin\AppData\Local\Temp\d5c2c232447f0e59930b03dfb417815c61fa857d6ed61237554a947e598a08f1.exe

"C:\Users\Admin\AppData\Local\Temp\d5c2c232447f0e59930b03dfb417815c61fa857d6ed61237554a947e598a08f1.exe"

C:\Users\Admin\AppData\Local\Temp\d5c2c232447f0e59930b03dfb417815c61fa857d6ed61237554a947e598a08f1.exe

"C:\Users\Admin\AppData\Local\Temp\d5c2c232447f0e59930b03dfb417815c61fa857d6ed61237554a947e598a08f1.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 drive.google.com udp
GB 142.250.187.238:443 drive.google.com tcp
US 8.8.8.8:53 drive.usercontent.google.com udp
GB 142.250.179.225:443 drive.usercontent.google.com tcp

Files

\Users\Admin\AppData\Local\Temp\nsd918.tmp\System.dll

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

memory/1736-14-0x00000000040D0000-0x00000000060D1000-memory.dmp

memory/1736-15-0x0000000077981000-0x0000000077A82000-memory.dmp

memory/1736-16-0x0000000077980000-0x0000000077B29000-memory.dmp

memory/2668-17-0x0000000000400000-0x0000000001462000-memory.dmp

memory/2668-18-0x0000000077980000-0x0000000077B29000-memory.dmp

memory/1736-19-0x00000000040D0000-0x00000000060D1000-memory.dmp

memory/2668-20-0x0000000000400000-0x0000000001462000-memory.dmp

memory/1736-54-0x00000000040D0000-0x00000000060D1000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-05-22 14:52

Reported

2024-05-22 14:55

Platform

win10v2004-20240508-en

Max time kernel

149s

Max time network

147s

Command Line

"C:\Users\Admin\AppData\Local\Temp\d5c2c232447f0e59930b03dfb417815c61fa857d6ed61237554a947e598a08f1.exe"

Signatures

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 System32 directory

Description Indicator Process Target
File opened for modification C:\Windows\SysWOW64\Ranglesten\atriumgaardes.pla C:\Users\Admin\AppData\Local\Temp\d5c2c232447f0e59930b03dfb417815c61fa857d6ed61237554a947e598a08f1.exe N/A

Drops file in Program Files directory

Description Indicator Process Target
File opened for modification C:\Program Files (x86)\Common Files\senegas.sed C:\Users\Admin\AppData\Local\Temp\d5c2c232447f0e59930b03dfb417815c61fa857d6ed61237554a947e598a08f1.exe N/A

Drops file in Windows directory

Description Indicator Process Target
File opened for modification C:\Windows\resources\0409\bearlet.tor C:\Users\Admin\AppData\Local\Temp\d5c2c232447f0e59930b03dfb417815c61fa857d6ed61237554a947e598a08f1.exe N/A
File opened for modification C:\Windows\andenklasseskupeens\jordfyld.ini C:\Users\Admin\AppData\Local\Temp\d5c2c232447f0e59930b03dfb417815c61fa857d6ed61237554a947e598a08f1.exe N/A

Enumerates physical storage devices

Suspicious behavior: MapViewOfSection

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\d5c2c232447f0e59930b03dfb417815c61fa857d6ed61237554a947e598a08f1.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\d5c2c232447f0e59930b03dfb417815c61fa857d6ed61237554a947e598a08f1.exe

"C:\Users\Admin\AppData\Local\Temp\d5c2c232447f0e59930b03dfb417815c61fa857d6ed61237554a947e598a08f1.exe"

C:\Users\Admin\AppData\Local\Temp\d5c2c232447f0e59930b03dfb417815c61fa857d6ed61237554a947e598a08f1.exe

"C:\Users\Admin\AppData\Local\Temp\d5c2c232447f0e59930b03dfb417815c61fa857d6ed61237554a947e598a08f1.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 209.205.72.20.in-addr.arpa udp
US 8.8.8.8:53 18.24.18.2.in-addr.arpa udp
US 8.8.8.8:53 g.bing.com udp
US 204.79.197.237:443 g.bing.com tcp
NL 23.62.61.97:443 www.bing.com tcp
US 8.8.8.8:53 20.160.190.20.in-addr.arpa udp
US 8.8.8.8:53 237.197.79.204.in-addr.arpa udp
US 8.8.8.8:53 97.61.62.23.in-addr.arpa udp
NL 23.62.61.129:443 www.bing.com tcp
US 8.8.8.8:53 129.61.62.23.in-addr.arpa udp
US 8.8.8.8:53 drive.google.com udp
GB 142.250.187.238:443 drive.google.com tcp
US 8.8.8.8:53 196.249.167.52.in-addr.arpa udp
US 8.8.8.8:53 238.187.250.142.in-addr.arpa udp
US 8.8.8.8:53 67.169.217.172.in-addr.arpa udp
US 8.8.8.8:53 drive.usercontent.google.com udp
GB 142.250.179.225:443 drive.usercontent.google.com tcp
US 8.8.8.8:53 225.179.250.142.in-addr.arpa udp
US 8.8.8.8:53 157.123.68.40.in-addr.arpa udp
US 8.8.8.8:53 15.164.165.52.in-addr.arpa udp
US 8.8.8.8:53 0.204.248.87.in-addr.arpa udp
US 8.8.8.8:53 30.243.111.52.in-addr.arpa udp
US 8.8.8.8:53 57.169.31.20.in-addr.arpa udp

Files

C:\Users\Admin\AppData\Local\Temp\nsg638F.tmp\System.dll

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

memory/2268-13-0x0000000005240000-0x0000000007241000-memory.dmp

memory/2268-14-0x0000000077D91000-0x0000000077EB1000-memory.dmp

memory/2268-15-0x00000000749E4000-0x00000000749E5000-memory.dmp

memory/4924-16-0x0000000000400000-0x0000000001654000-memory.dmp

memory/4924-17-0x0000000001660000-0x0000000003661000-memory.dmp

memory/2268-27-0x0000000005240000-0x0000000007241000-memory.dmp

memory/4924-31-0x0000000000400000-0x0000000001654000-memory.dmp

memory/4924-33-0x0000000001660000-0x0000000003661000-memory.dmp

memory/2268-38-0x0000000005240000-0x0000000007241000-memory.dmp