Malware Analysis Report

2024-12-06 03:18

Sample ID 241024-cqynxszekd
Target d4403b301fd83b63921be53b6d3e9dfab987ff2aa133511b3b2e1a4dcc22cdc5.exe
SHA256 d4403b301fd83b63921be53b6d3e9dfab987ff2aa133511b3b2e1a4dcc22cdc5
Tags
guloader discovery downloader
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

d4403b301fd83b63921be53b6d3e9dfab987ff2aa133511b3b2e1a4dcc22cdc5

Threat Level: Known bad

The file d4403b301fd83b63921be53b6d3e9dfab987ff2aa133511b3b2e1a4dcc22cdc5.exe was found to be: Known bad.

Malicious Activity Summary

guloader discovery downloader

Guloader,Cloudeye

Loads dropped DLL

Legitimate hosting services abused for malware hosting/C2

Suspicious use of NtSetInformationThreadHideFromDebugger

Drops file in System32 directory

Suspicious use of NtCreateThreadExHideFromDebugger

Suspicious use of SetThreadContext

Drops file in Windows directory

Enumerates physical storage devices

Program crash

System Location Discovery: System Language Discovery

Unsigned PE

NSIS installer

Suspicious behavior: EnumeratesProcesses

Suspicious behavior: MapViewOfSection

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-10-24 02:17

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: behavioral1

Detonation Overview

Submitted

2024-10-24 02:17

Reported

2024-10-24 04:38

Platform

win7-20240903-en

Max time kernel

119s

Max time network

120s

Command Line

"C:\Users\Admin\AppData\Local\Temp\d4403b301fd83b63921be53b6d3e9dfab987ff2aa133511b3b2e1a4dcc22cdc5.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\oecus\svante.Eft C:\Users\Admin\AppData\Local\Temp\d4403b301fd83b63921be53b6d3e9dfab987ff2aa133511b3b2e1a4dcc22cdc5.exe N/A

Suspicious use of NtCreateThreadExHideFromDebugger

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\d4403b301fd83b63921be53b6d3e9dfab987ff2aa133511b3b2e1a4dcc22cdc5.exe N/A

Drops file in Windows directory

Description Indicator Process Target
File opened for modification C:\Windows\resources\sankthansaftnerne\clodpoll.saf C:\Users\Admin\AppData\Local\Temp\d4403b301fd83b63921be53b6d3e9dfab987ff2aa133511b3b2e1a4dcc22cdc5.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\d4403b301fd83b63921be53b6d3e9dfab987ff2aa133511b3b2e1a4dcc22cdc5.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\d4403b301fd83b63921be53b6d3e9dfab987ff2aa133511b3b2e1a4dcc22cdc5.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\d4403b301fd83b63921be53b6d3e9dfab987ff2aa133511b3b2e1a4dcc22cdc5.exe N/A

Suspicious behavior: MapViewOfSection

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\d4403b301fd83b63921be53b6d3e9dfab987ff2aa133511b3b2e1a4dcc22cdc5.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2372 wrote to memory of 2556 N/A C:\Users\Admin\AppData\Local\Temp\d4403b301fd83b63921be53b6d3e9dfab987ff2aa133511b3b2e1a4dcc22cdc5.exe C:\Users\Admin\AppData\Local\Temp\d4403b301fd83b63921be53b6d3e9dfab987ff2aa133511b3b2e1a4dcc22cdc5.exe
PID 2372 wrote to memory of 2556 N/A C:\Users\Admin\AppData\Local\Temp\d4403b301fd83b63921be53b6d3e9dfab987ff2aa133511b3b2e1a4dcc22cdc5.exe C:\Users\Admin\AppData\Local\Temp\d4403b301fd83b63921be53b6d3e9dfab987ff2aa133511b3b2e1a4dcc22cdc5.exe
PID 2372 wrote to memory of 2556 N/A C:\Users\Admin\AppData\Local\Temp\d4403b301fd83b63921be53b6d3e9dfab987ff2aa133511b3b2e1a4dcc22cdc5.exe C:\Users\Admin\AppData\Local\Temp\d4403b301fd83b63921be53b6d3e9dfab987ff2aa133511b3b2e1a4dcc22cdc5.exe
PID 2372 wrote to memory of 2556 N/A C:\Users\Admin\AppData\Local\Temp\d4403b301fd83b63921be53b6d3e9dfab987ff2aa133511b3b2e1a4dcc22cdc5.exe C:\Users\Admin\AppData\Local\Temp\d4403b301fd83b63921be53b6d3e9dfab987ff2aa133511b3b2e1a4dcc22cdc5.exe
PID 2372 wrote to memory of 2556 N/A C:\Users\Admin\AppData\Local\Temp\d4403b301fd83b63921be53b6d3e9dfab987ff2aa133511b3b2e1a4dcc22cdc5.exe C:\Users\Admin\AppData\Local\Temp\d4403b301fd83b63921be53b6d3e9dfab987ff2aa133511b3b2e1a4dcc22cdc5.exe
PID 2372 wrote to memory of 2556 N/A C:\Users\Admin\AppData\Local\Temp\d4403b301fd83b63921be53b6d3e9dfab987ff2aa133511b3b2e1a4dcc22cdc5.exe C:\Users\Admin\AppData\Local\Temp\d4403b301fd83b63921be53b6d3e9dfab987ff2aa133511b3b2e1a4dcc22cdc5.exe
PID 2556 wrote to memory of 2004 N/A C:\Users\Admin\AppData\Local\Temp\d4403b301fd83b63921be53b6d3e9dfab987ff2aa133511b3b2e1a4dcc22cdc5.exe C:\Windows\SysWOW64\WerFault.exe
PID 2556 wrote to memory of 2004 N/A C:\Users\Admin\AppData\Local\Temp\d4403b301fd83b63921be53b6d3e9dfab987ff2aa133511b3b2e1a4dcc22cdc5.exe C:\Windows\SysWOW64\WerFault.exe
PID 2556 wrote to memory of 2004 N/A C:\Users\Admin\AppData\Local\Temp\d4403b301fd83b63921be53b6d3e9dfab987ff2aa133511b3b2e1a4dcc22cdc5.exe C:\Windows\SysWOW64\WerFault.exe
PID 2556 wrote to memory of 2004 N/A C:\Users\Admin\AppData\Local\Temp\d4403b301fd83b63921be53b6d3e9dfab987ff2aa133511b3b2e1a4dcc22cdc5.exe C:\Windows\SysWOW64\WerFault.exe

Processes

C:\Users\Admin\AppData\Local\Temp\d4403b301fd83b63921be53b6d3e9dfab987ff2aa133511b3b2e1a4dcc22cdc5.exe

"C:\Users\Admin\AppData\Local\Temp\d4403b301fd83b63921be53b6d3e9dfab987ff2aa133511b3b2e1a4dcc22cdc5.exe"

C:\Users\Admin\AppData\Local\Temp\d4403b301fd83b63921be53b6d3e9dfab987ff2aa133511b3b2e1a4dcc22cdc5.exe

"C:\Users\Admin\AppData\Local\Temp\d4403b301fd83b63921be53b6d3e9dfab987ff2aa133511b3b2e1a4dcc22cdc5.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2556 -s 68

Network

Country Destination Domain Proto
US 8.8.8.8:53 drive.google.com udp
GB 172.217.16.238:443 drive.google.com tcp
US 8.8.8.8:53 c.pki.goog udp
GB 172.217.16.227:80 c.pki.goog tcp
US 8.8.8.8:53 o.pki.goog udp
GB 142.250.178.3:80 o.pki.goog tcp
US 8.8.8.8:53 drive.usercontent.google.com udp
GB 216.58.201.97:443 drive.usercontent.google.com tcp
US 8.8.8.8:53 crl.microsoft.com udp
GB 2.18.190.73:80 crl.microsoft.com tcp

Files

C:\Users\Admin\Desktop\peripheries.lnk

MD5 4021a7636bb3e259ef1e3008ca525eba
SHA1 0b3b95efca7fa20a6136a0c771d0ee093940f513
SHA256 e6ac3b7108594184ad294ead053236dc56dedb7a7778e9e311912f6df12b8e45
SHA512 5422ac2b033cc21d2967476e0eb474affe00440a8f5ad195153aa69335f658d244c18b1ee906dfc86e172f75231eb3f45fb3689244f50dce7c32548debe2b8fd

C:\Users\Admin\Desktop\peripheries.lnk

MD5 45c4d5c75a54af4ee0c3af95862d41ca
SHA1 99a0c99d133dbb4765a2e41b8721b02fac4a7245
SHA256 ee3c6db42ef7623832610b8febd6c1b76baec8b56409736ba4c94636994d6748
SHA512 8817d93162c41af7055d8466e16f16e216fc176a73bdf807c222bbe8d858c480528f105a2b5a8a43875e5848dcc4c09e1e9d7280bf56033bbe9d3d1afe6e49f3

\Users\Admin\AppData\Local\Temp\nsjD470.tmp\System.dll

MD5 cf85183b87314359488b850f9e97a698
SHA1 6b6c790037eec7ebea4d05590359cb4473f19aea
SHA256 3b6a5cb2a3c091814fce297c04fb677f72732fb21615102c62a195fdc2e7dfac
SHA512 fe484b3fc89aeed3a6b71b90b90ea11a787697e56be3077154b6ddc2646850f6c38589ed422ff792e391638a80a778d33f22e891e76b5d65896c6fb4696a2c3b

memory/2372-24644-0x00000000036E0000-0x000000000612C000-memory.dmp

memory/2372-24645-0x0000000077AA1000-0x0000000077BA2000-memory.dmp

memory/2372-24647-0x0000000077AA0000-0x0000000077C49000-memory.dmp

memory/2372-24646-0x00000000036E0000-0x000000000612C000-memory.dmp

memory/2372-24648-0x00000000036E0000-0x000000000612C000-memory.dmp

memory/2556-24649-0x0000000000400000-0x0000000001462000-memory.dmp

memory/2556-24650-0x0000000077AA0000-0x0000000077C49000-memory.dmp

memory/2556-24670-0x0000000000400000-0x0000000001462000-memory.dmp

memory/2556-24672-0x0000000000400000-0x0000000001462000-memory.dmp

memory/2556-24674-0x0000000000400000-0x0000000001462000-memory.dmp

memory/2556-24673-0x0000000000400000-0x0000000001462000-memory.dmp

memory/2556-24676-0x0000000000400000-0x0000000001462000-memory.dmp

memory/2556-24675-0x0000000000400000-0x0000000001462000-memory.dmp

memory/2556-24677-0x0000000000400000-0x0000000001462000-memory.dmp

Analysis: behavioral2

Detonation Overview

Reported

0001-01-01 00:00

Command Line

N/A

Signatures

N/A

Processes

N/A

Network

N/A

Files

N/A

Analysis: behavioral3

Detonation Overview

Submitted

2024-10-24 02:17

Reported

2024-10-24 04:42

Platform

win7-20241010-en

Max time kernel

119s

Max time network

126s

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 2732 -s 228

Network

N/A

Files

N/A

Analysis: behavioral4

Detonation Overview

Submitted

2024-10-24 02:17

Reported

2024-10-24 23:03

Platform

win10v2004-20241007-en

Max time kernel

149s

Max time network

151s

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 2720 wrote to memory of 2696 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2720 wrote to memory of 2696 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2720 wrote to memory of 2696 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 420 -p 2696 -ip 2696

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2696 -s 612

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 0.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 232.168.11.51.in-addr.arpa udp
US 8.8.8.8:53 56.163.245.4.in-addr.arpa udp
US 8.8.8.8:53 241.42.69.40.in-addr.arpa udp
US 8.8.8.8:53 43.58.199.20.in-addr.arpa udp
US 8.8.8.8:53 30.243.111.52.in-addr.arpa udp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp

Files

N/A