Malware Analysis Report

2024-12-06 03:24

Sample ID 241022-t4xr8avbrc
Target 22102024_1637_22102024_factura.rar
SHA256 28d29ff8363e71797bd687b5d42b715633e42ce76f4649c7ae68f5a229a36ac9
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

28d29ff8363e71797bd687b5d42b715633e42ce76f4649c7ae68f5a229a36ac9

Threat Level: Known bad

The file 22102024_1637_22102024_factura.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 NtSetInformationThreadHideFromDebugger

Suspicious use of NtCreateThreadExHideFromDebugger

Suspicious use of SetThreadContext

Drops file in Windows directory

Program crash

Unsigned PE

Enumerates physical storage devices

System Location Discovery: System Language Discovery

NSIS installer

Suspicious use of WriteProcessMemory

Suspicious behavior: MapViewOfSection

Suspicious behavior: EnumeratesProcesses

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-10-22 16:37

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 16:37

Reported

2024-10-22 16:42

Platform

win7-20240708-en

Max time kernel

119s

Max time network

174s

Command Line

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

Signatures

Guloader,Cloudeye

downloader guloader

Loads dropped DLL

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

Suspicious use of NtSetInformationThreadHideFromDebugger

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

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 2380 set thread context of 2860 N/A C:\Users\Admin\AppData\Local\Temp\Gansa.exe C:\Users\Admin\AppData\Local\Temp\Gansa.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\Gansa.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\Gansa.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\Gansa.exe N/A

Suspicious behavior: MapViewOfSection

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

Processes

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

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

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

"C:\Users\Admin\AppData\Local\Temp\Gansa.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 crl.microsoft.com udp
GB 2.18.190.75:80 crl.microsoft.com tcp
US 8.8.8.8:53 www.microsoft.com udp
GB 184.25.193.234:80 www.microsoft.com tcp

Files

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

MD5 1c2b8790978c2e8c8ce45d3c029e87ab
SHA1 7e864b161457faa2360606167c7ac61479e128e2
SHA256 26917d24d97b03c146f45fa8e9035077b4c6973d2513b60cb1c5e9b1951d1a88
SHA512 f4a117da4c0d09684bf19a63f419a8ba8c617b795abac470d3bc273f70b03e6e1001e701af472addbc28289faa227714f6d4dcdcff4da6ddf7bccf7c4d9c3b84

\Users\Admin\AppData\Local\Temp\nsoBAF7.tmp\System.dll

MD5 cf85183b87314359488b850f9e97a698
SHA1 6b6c790037eec7ebea4d05590359cb4473f19aea
SHA256 3b6a5cb2a3c091814fce297c04fb677f72732fb21615102c62a195fdc2e7dfac
SHA512 fe484b3fc89aeed3a6b71b90b90ea11a787697e56be3077154b6ddc2646850f6c38589ed422ff792e391638a80a778d33f22e891e76b5d65896c6fb4696a2c3b

memory/2380-429-0x0000000003A30000-0x0000000006973000-memory.dmp

memory/2380-430-0x0000000003A30000-0x0000000006973000-memory.dmp

memory/2380-432-0x00000000779F0000-0x0000000077B99000-memory.dmp

memory/2380-431-0x00000000779F1000-0x0000000077AF2000-memory.dmp

memory/2380-435-0x0000000003A30000-0x0000000006973000-memory.dmp

memory/2860-434-0x00000000779F0000-0x0000000077B99000-memory.dmp

memory/2860-433-0x0000000000400000-0x0000000001462000-memory.dmp

memory/2860-455-0x0000000000400000-0x0000000001462000-memory.dmp

memory/2860-457-0x0000000000400000-0x0000000001462000-memory.dmp

memory/2860-458-0x0000000000400000-0x0000000001462000-memory.dmp

memory/2860-464-0x0000000000400000-0x0000000001462000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-10-22 16:37

Reported

2024-10-22 16:42

Platform

win10v2004-20241007-en

Max time kernel

135s

Max time network

203s

Command Line

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

Signatures

Guloader,Cloudeye

downloader guloader

Loads dropped DLL

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

Suspicious use of NtSetInformationThreadHideFromDebugger

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

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 3412 set thread context of 3488 N/A C:\Users\Admin\AppData\Local\Temp\Gansa.exe C:\Users\Admin\AppData\Local\Temp\Gansa.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\Gansa.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\Gansa.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\Gansa.exe N/A

Suspicious behavior: MapViewOfSection

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

Processes

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

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

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

"C:\Users\Admin\AppData\Local\Temp\Gansa.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 2.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 88.156.103.20.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 8.8.8.8:53 217.106.137.52.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 drive.usercontent.google.com udp
GB 216.58.201.97:443 drive.usercontent.google.com 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 97.201.58.216.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 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 29.243.111.52.in-addr.arpa udp
US 8.8.8.8:53 205.47.74.20.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

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

MD5 f9842e93387b3e6e52d3055df84dbabc
SHA1 7da25f0b4ac3962a0b84f56833a980a7b7d6a1ab
SHA256 0f4f832bc7594227f8dbe02612a20aaac0248c5e2e1334db8f8810b92d79cb9f
SHA512 d722c963fafefa334787e831e8f8fd1d979baa17c3f47592edc4cfb19543c42d736425d0f19a462dd38293c8d654bb690a25bcd513f18bffafbc87eceeddb124

C:\Users\Admin\AppData\Local\Temp\nsy8195.tmp\System.dll

MD5 cf85183b87314359488b850f9e97a698
SHA1 6b6c790037eec7ebea4d05590359cb4473f19aea
SHA256 3b6a5cb2a3c091814fce297c04fb677f72732fb21615102c62a195fdc2e7dfac
SHA512 fe484b3fc89aeed3a6b71b90b90ea11a787697e56be3077154b6ddc2646850f6c38589ed422ff792e391638a80a778d33f22e891e76b5d65896c6fb4696a2c3b

memory/3412-429-0x0000000003870000-0x00000000067B3000-memory.dmp

memory/3412-430-0x0000000003870000-0x00000000067B3000-memory.dmp

memory/3412-431-0x00000000776F1000-0x0000000077811000-memory.dmp

memory/3412-433-0x0000000010004000-0x0000000010005000-memory.dmp

memory/3412-432-0x00000000776F1000-0x0000000077811000-memory.dmp

memory/3488-434-0x0000000000400000-0x0000000001654000-memory.dmp

memory/3412-435-0x0000000003870000-0x00000000067B3000-memory.dmp

memory/3488-436-0x0000000001660000-0x00000000045A3000-memory.dmp

memory/3488-449-0x0000000000400000-0x0000000001654000-memory.dmp

memory/3488-450-0x0000000001660000-0x00000000045A3000-memory.dmp

memory/3488-451-0x0000000000400000-0x0000000001654000-memory.dmp

memory/3488-452-0x0000000000400000-0x0000000001654000-memory.dmp

memory/3488-453-0x0000000000400000-0x0000000001654000-memory.dmp

memory/3488-456-0x0000000000400000-0x0000000001654000-memory.dmp

memory/3488-457-0x0000000001660000-0x00000000045A3000-memory.dmp

Analysis: behavioral3

Detonation Overview

Submitted

2024-10-22 16:37

Reported

2024-10-22 16:42

Platform

win7-20241010-en

Max time kernel

120s

Max time network

125s

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 2324 -s 228

Network

N/A

Files

N/A

Analysis: behavioral4

Detonation Overview

Submitted

2024-10-22 16:37

Reported

2024-10-22 16:42

Platform

win10v2004-20241007-en

Max time kernel

135s

Max time network

207s

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 1172 wrote to memory of 4740 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1172 wrote to memory of 4740 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1172 wrote to memory of 4740 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 424 -p 4740 -ip 4740

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 4740 -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 69.190.18.2.in-addr.arpa udp
US 8.8.8.8:53 69.31.126.40.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 8.8.8.8:53 232.168.11.51.in-addr.arpa udp
US 8.8.8.8:53 217.106.137.52.in-addr.arpa udp
US 8.8.8.8:53 212.20.149.52.in-addr.arpa udp
US 8.8.8.8:53 241.42.69.40.in-addr.arpa udp
US 8.8.8.8:53 137.190.18.2.in-addr.arpa udp
US 8.8.8.8:53 29.243.111.52.in-addr.arpa udp
US 8.8.8.8:53 205.47.74.20.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