Malware Analysis Report

2024-12-06 03:25

Sample ID 241022-t71y2svdkc
Target 22102024_1642_21102024_Transferenciapg.pdf.rar
SHA256 790f423f015c7a47de1d62c5fa4148c8b491209b22a272cfff42b8cd7e61e0ee
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

790f423f015c7a47de1d62c5fa4148c8b491209b22a272cfff42b8cd7e61e0ee

Threat Level: Known bad

The file 22102024_1642_21102024_Transferenciapg.pdf.rar 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 NtCreateThreadExHideFromDebugger

Suspicious use of SetThreadContext

Suspicious use of NtSetInformationThreadHideFromDebugger

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 behavior: EnumeratesProcesses

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-10-22 16:42

Signatures

Unsigned PE

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

2024-10-22 16:42

Reported

2024-10-22 16:47

Platform

win7-20240729-en

Max time kernel

239s

Max time network

240s

Command Line

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

Signatures

Guloader,Cloudeye

downloader guloader

Loads dropped DLL

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

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

Suspicious use of NtCreateThreadExHideFromDebugger

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

Suspicious use of NtSetInformationThreadHideFromDebugger

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

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 2748 set thread context of 884 N/A C:\Users\Admin\AppData\Local\Temp\outrap.exe C:\Users\Admin\AppData\Local\Temp\outrap.exe

Drops file in Windows directory

Description Indicator Process Target
File opened for modification C:\Windows\resources\Trnregimenternes\totalsanerende.Obs202 C:\Users\Admin\AppData\Local\Temp\outrap.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\outrap.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\outrap.exe N/A

Suspicious behavior: MapViewOfSection

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

Processes

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

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

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

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

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 142.250.178.3:80 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 www.microsoft.com udp
GB 184.25.193.234:80 www.microsoft.com tcp
US 8.8.8.8:53 crl.microsoft.com udp
GB 2.18.190.72:80 crl.microsoft.com tcp

Files

C:\Users\Admin\Music\incinerations.lnk

MD5 8beb31457eb468a14351c2873169fcaa
SHA1 cf68377dff7ae294e464ef5fc913b2de195d51ab
SHA256 4ffba9f5e0b15d0689e6412ebc9d315e926b5b70490bc34fa829a8631041da91
SHA512 e0661077039088bb1cd97f19ada8052703244750ffcf2b22d0d839751b50f799c12233bd915d4d72d520d9478b17d0ef743c66532b00b50e7ca39dbed655bf24

\Users\Admin\AppData\Local\Temp\nso7F7D.tmp\System.dll

MD5 cf85183b87314359488b850f9e97a698
SHA1 6b6c790037eec7ebea4d05590359cb4473f19aea
SHA256 3b6a5cb2a3c091814fce297c04fb677f72732fb21615102c62a195fdc2e7dfac
SHA512 fe484b3fc89aeed3a6b71b90b90ea11a787697e56be3077154b6ddc2646850f6c38589ed422ff792e391638a80a778d33f22e891e76b5d65896c6fb4696a2c3b

memory/2748-429-0x0000000003BC0000-0x0000000005CB6000-memory.dmp

memory/2748-430-0x0000000077201000-0x0000000077302000-memory.dmp

memory/2748-431-0x0000000077200000-0x00000000773A9000-memory.dmp

memory/2748-432-0x00000000773F0000-0x00000000774C6000-memory.dmp

memory/2748-433-0x0000000003BC0000-0x0000000005CB6000-memory.dmp

memory/884-435-0x0000000077200000-0x00000000773A9000-memory.dmp

memory/884-434-0x0000000000400000-0x0000000001462000-memory.dmp

memory/884-457-0x0000000000400000-0x0000000001462000-memory.dmp

memory/884-458-0x0000000000400000-0x0000000001462000-memory.dmp

memory/884-464-0x0000000000400000-0x0000000001462000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-10-22 16:42

Reported

2024-10-22 16:47

Platform

win10v2004-20241007-en

Max time kernel

130s

Max time network

203s

Command Line

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

Signatures

Guloader,Cloudeye

downloader guloader

Loads dropped DLL

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

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

Suspicious use of NtCreateThreadExHideFromDebugger

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

Suspicious use of NtSetInformationThreadHideFromDebugger

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

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 4168 set thread context of 1340 N/A C:\Users\Admin\AppData\Local\Temp\outrap.exe C:\Users\Admin\AppData\Local\Temp\outrap.exe

Drops file in Windows directory

Description Indicator Process Target
File opened for modification C:\Windows\resources\Trnregimenternes\totalsanerende.Obs202 C:\Users\Admin\AppData\Local\Temp\outrap.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\outrap.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\outrap.exe N/A

Suspicious behavior: MapViewOfSection

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

Processes

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

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

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

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

Network

Country Destination Domain Proto
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 149.220.183.52.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 g.bing.com udp
US 150.171.27.10:443 g.bing.com tcp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 138.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 43.58.199.20.in-addr.arpa udp
US 8.8.8.8:53 13.86.106.20.in-addr.arpa udp
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 142.250.178.3:80 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 8.8.8.8:53 238.16.217.172.in-addr.arpa udp
US 8.8.8.8:53 3.178.250.142.in-addr.arpa udp
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 97.201.58.216.in-addr.arpa udp
US 8.8.8.8:53 50.23.12.20.in-addr.arpa udp
US 8.8.8.8:53 198.187.3.20.in-addr.arpa udp
US 8.8.8.8:53 139.190.18.2.in-addr.arpa udp
US 8.8.8.8:53 138.190.18.2.in-addr.arpa udp
US 8.8.8.8:53 240.221.184.93.in-addr.arpa udp
US 8.8.8.8:53 31.243.111.52.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

Files

C:\Users\Admin\Music\incinerations.lnk

MD5 dbe6662c5c0836c31d370d8e00205b4f
SHA1 e9fd850a470c54041afcfa400c731cb6621dab32
SHA256 ad828e50f5cc99cd445970176d51b18aef19558534e444162af89046c8919c20
SHA512 36bbdcde78e509c69a3608f609930ae73709c73d295e6c658228c6613aec80c5a52c82a2dedff0310449e43704c6164eca8dbab7f11b95b8db33f7a893db8bf2

C:\Users\Admin\AppData\Local\Temp\nsp78EA.tmp\System.dll

MD5 cf85183b87314359488b850f9e97a698
SHA1 6b6c790037eec7ebea4d05590359cb4473f19aea
SHA256 3b6a5cb2a3c091814fce297c04fb677f72732fb21615102c62a195fdc2e7dfac
SHA512 fe484b3fc89aeed3a6b71b90b90ea11a787697e56be3077154b6ddc2646850f6c38589ed422ff792e391638a80a778d33f22e891e76b5d65896c6fb4696a2c3b

memory/4168-429-0x00000000035E0000-0x00000000056D6000-memory.dmp

memory/4168-430-0x0000000077071000-0x0000000077191000-memory.dmp

memory/4168-432-0x00000000035E0000-0x00000000056D6000-memory.dmp

memory/1340-431-0x0000000000400000-0x0000000001654000-memory.dmp

memory/1340-433-0x0000000001660000-0x0000000003756000-memory.dmp

memory/1340-446-0x0000000001660000-0x0000000003756000-memory.dmp

memory/1340-447-0x0000000000400000-0x0000000001654000-memory.dmp

memory/1340-448-0x0000000000400000-0x0000000001654000-memory.dmp

memory/1340-449-0x0000000077071000-0x0000000077191000-memory.dmp

memory/1340-450-0x0000000000400000-0x0000000001654000-memory.dmp

memory/1340-453-0x0000000000400000-0x0000000001654000-memory.dmp

memory/1340-454-0x0000000001660000-0x0000000003756000-memory.dmp

Analysis: behavioral3

Detonation Overview

Submitted

2024-10-22 16:42

Reported

2024-10-22 16:47

Platform

win7-20240903-en

Max time kernel

118s

Max time network

118s

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 1596 -s 224

Network

N/A

Files

N/A

Analysis: behavioral4

Detonation Overview

Submitted

2024-10-22 16:42

Reported

2024-10-22 16:47

Platform

win10v2004-20241007-en

Max time kernel

133s

Max time network

206s

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 4508 wrote to memory of 2916 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 4508 wrote to memory of 2916 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 4508 wrote to memory of 2916 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 360 -p 2916 -ip 2916

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2916 -s 612

Network

Country Destination Domain Proto
US 8.8.8.8:53 241.150.49.20.in-addr.arpa udp
US 8.8.8.8:53 77.190.18.2.in-addr.arpa udp
US 8.8.8.8:53 75.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 13.86.106.20.in-addr.arpa udp
US 8.8.8.8:53 241.42.69.40.in-addr.arpa udp
US 8.8.8.8:53 50.23.12.20.in-addr.arpa udp
US 8.8.8.8:53 69.190.18.2.in-addr.arpa udp
US 8.8.8.8:53 133.190.18.2.in-addr.arpa udp
US 8.8.8.8:53 26.35.223.20.in-addr.arpa udp
US 8.8.8.8:53 19.229.111.52.in-addr.arpa udp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 8.8.8.8:53 10.28.171.150.in-addr.arpa udp

Files

N/A