Malware Analysis Report

2025-04-03 14:22

Sample ID 241211-dkk2baxphn
Target 9bcc8408251780a35ef15c86ca5613bc508d3be0562864f5756b9b8a7cd9115e.rar
SHA256 9bcc8408251780a35ef15c86ca5613bc508d3be0562864f5756b9b8a7cd9115e
Tags
discovery guloader collection downloader evasion spyware stealer
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

9bcc8408251780a35ef15c86ca5613bc508d3be0562864f5756b9b8a7cd9115e

Threat Level: Known bad

The file 9bcc8408251780a35ef15c86ca5613bc508d3be0562864f5756b9b8a7cd9115e.rar was found to be: Known bad.

Malicious Activity Summary

discovery guloader collection downloader evasion spyware stealer

Guloader,Cloudeye

Guloader family

Disables Task Manager via registry modification

Reads user/profile data of web browsers

Reads user/profile data of local email clients

Loads dropped DLL

Accesses Microsoft Outlook profiles

Looks up external IP address via web service

Legitimate hosting services abused for malware hosting/C2

Suspicious use of NtSetInformationThreadHideFromDebugger

Suspicious use of SetThreadContext

Suspicious use of NtCreateThreadExHideFromDebugger

Enumerates physical storage devices

System Location Discovery: System Language Discovery

Program crash

Unsigned PE

outlook_office_path

Suspicious use of AdjustPrivilegeToken

Suspicious behavior: EnumeratesProcesses

outlook_win_path

Suspicious use of WriteProcessMemory

Suspicious behavior: MapViewOfSection

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-12-11 03:04

Signatures

Unsigned PE

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

2024-12-11 03:04

Reported

2024-12-11 03:06

Platform

win7-20240903-en

Max time kernel

11s

Max time network

17s

Command Line

"C:\Users\Admin\AppData\Local\Temp\Confirm revised invoice to proceed with payment ASAP.exe"

Signatures

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\Confirm revised invoice to proceed with payment ASAP.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\Confirm revised invoice to proceed with payment ASAP.exe

"C:\Users\Admin\AppData\Local\Temp\Confirm revised invoice to proceed with payment ASAP.exe"

Network

N/A

Files

\Users\Admin\AppData\Local\Temp\nsy9B38.tmp\System.dll

MD5 0d7ad4f45dc6f5aa87f606d0331c6901
SHA1 48df0911f0484cbe2a8cdd5362140b63c41ee457
SHA256 3eb38ae99653a7dbc724132ee240f6e5c4af4bfe7c01d31d23faf373f9f2eaca
SHA512 c07de7308cb54205e8bd703001a7fe4fd7796c9ac1b4bb330c77c872bf712b093645f40b80ce7127531fe6746a5b66e18ea073ab6a644934abed9bb64126fea9

memory/2436-15-0x00000000036B0000-0x00000000061EA000-memory.dmp

memory/2436-20-0x00000000036B0000-0x00000000061EA000-memory.dmp

memory/2436-15-0x00000000036B0000-0x00000000061EA000-memory.dmp

memory/2436-20-0x00000000036B0000-0x00000000061EA000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-12-11 03:04

Reported

2024-12-11 03:06

Platform

win10v2004-20241007-en

Max time kernel

150s

Max time network

142s

Command Line

"C:\Users\Admin\AppData\Local\Temp\Confirm revised invoice to proceed with payment ASAP.exe"

Signatures

Guloader family

guloader

Guloader,Cloudeye

downloader guloader

Disables Task Manager via registry modification

evasion

Reads user/profile data of local email clients

spyware stealer

Reads user/profile data of web browsers

spyware stealer

Accesses Microsoft Outlook profiles

collection
Description Indicator Process Target
Key opened \REGISTRY\USER\S-1-5-21-4050598569-1597076380-177084960-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 C:\Users\Admin\AppData\Local\Temp\Confirm revised invoice to proceed with payment ASAP.exe N/A
Key opened \REGISTRY\USER\S-1-5-21-4050598569-1597076380-177084960-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 C:\Users\Admin\AppData\Local\Temp\Confirm revised invoice to proceed with payment ASAP.exe N/A
Key opened \REGISTRY\USER\S-1-5-21-4050598569-1597076380-177084960-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 C:\Users\Admin\AppData\Local\Temp\Confirm revised invoice to proceed with payment ASAP.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

Looks up external IP address via web service

Description Indicator Process Target
N/A checkip.dyndns.org N/A N/A

Suspicious use of NtCreateThreadExHideFromDebugger

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\Confirm revised invoice to proceed with payment ASAP.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\Confirm revised invoice to proceed with payment ASAP.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\Confirm revised invoice to proceed with payment ASAP.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\Confirm revised invoice to proceed with payment ASAP.exe N/A

Suspicious behavior: MapViewOfSection

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\Confirm revised invoice to proceed with payment ASAP.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\Confirm revised invoice to proceed with payment ASAP.exe N/A

outlook_office_path

Description Indicator Process Target
Key opened \REGISTRY\USER\S-1-5-21-4050598569-1597076380-177084960-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 C:\Users\Admin\AppData\Local\Temp\Confirm revised invoice to proceed with payment ASAP.exe N/A

outlook_win_path

Description Indicator Process Target
Key opened \REGISTRY\USER\S-1-5-21-4050598569-1597076380-177084960-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 C:\Users\Admin\AppData\Local\Temp\Confirm revised invoice to proceed with payment ASAP.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\Confirm revised invoice to proceed with payment ASAP.exe

"C:\Users\Admin\AppData\Local\Temp\Confirm revised invoice to proceed with payment ASAP.exe"

C:\Users\Admin\AppData\Local\Temp\Confirm revised invoice to proceed with payment ASAP.exe

"C:\Users\Admin\AppData\Local\Temp\Confirm revised invoice to proceed with payment ASAP.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 154.239.44.20.in-addr.arpa udp
US 8.8.8.8:53 172.214.232.199.in-addr.arpa udp
US 8.8.8.8:53 134.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 196.249.167.52.in-addr.arpa udp
US 8.8.8.8:53 drive.google.com udp
GB 172.217.169.78:443 drive.google.com tcp
US 8.8.8.8:53 c.pki.goog udp
FR 142.250.179.67:80 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 78.169.217.172.in-addr.arpa udp
US 8.8.8.8:53 3.178.250.142.in-addr.arpa udp
US 8.8.8.8:53 67.179.250.142.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 checkip.dyndns.org udp
US 193.122.130.0:80 checkip.dyndns.org tcp
US 8.8.8.8:53 reallyfreegeoip.org udp
US 188.114.97.2:443 reallyfreegeoip.org tcp
US 8.8.8.8:53 0.130.122.193.in-addr.arpa udp
US 8.8.8.8:53 2.97.114.188.in-addr.arpa udp
US 8.8.8.8:53 53.210.109.20.in-addr.arpa udp
US 8.8.8.8:53 api.telegram.org udp
NL 149.154.167.220:443 api.telegram.org tcp
US 8.8.8.8:53 220.167.154.149.in-addr.arpa udp
US 8.8.8.8:53 171.39.242.20.in-addr.arpa udp
US 8.8.8.8:53 21.49.80.91.in-addr.arpa udp
US 8.8.8.8:53 13.227.111.52.in-addr.arpa udp

Files

C:\Users\Admin\AppData\Local\Temp\nsk9230.tmp\System.dll

MD5 0d7ad4f45dc6f5aa87f606d0331c6901
SHA1 48df0911f0484cbe2a8cdd5362140b63c41ee457
SHA256 3eb38ae99653a7dbc724132ee240f6e5c4af4bfe7c01d31d23faf373f9f2eaca
SHA512 c07de7308cb54205e8bd703001a7fe4fd7796c9ac1b4bb330c77c872bf712b093645f40b80ce7127531fe6746a5b66e18ea073ab6a644934abed9bb64126fea9

memory/4564-13-0x00000000032A0000-0x0000000005DDA000-memory.dmp

memory/4564-14-0x0000000077D81000-0x0000000077EA1000-memory.dmp

memory/4564-15-0x00000000032A0000-0x0000000005DDA000-memory.dmp

memory/1272-16-0x00000000016E0000-0x000000000421A000-memory.dmp

memory/1272-26-0x0000000000480000-0x00000000016D4000-memory.dmp

memory/1272-30-0x00000000016E0000-0x000000000421A000-memory.dmp

memory/1272-31-0x0000000000480000-0x00000000016D4000-memory.dmp

memory/1272-32-0x0000000000480000-0x000000000049E000-memory.dmp

memory/1272-33-0x0000000036F30000-0x00000000374D4000-memory.dmp

memory/1272-34-0x00000000374E0000-0x000000003757C000-memory.dmp

memory/1272-35-0x0000000037990000-0x0000000037A22000-memory.dmp

memory/1272-36-0x0000000037A60000-0x0000000037AB0000-memory.dmp

memory/1272-38-0x0000000037AF0000-0x0000000037CB2000-memory.dmp

memory/1272-39-0x0000000037D80000-0x0000000037D8A000-memory.dmp

Analysis: behavioral3

Detonation Overview

Submitted

2024-12-11 03:04

Reported

2024-12-11 03:06

Platform

win7-20240708-en

Max time kernel

119s

Max time network

120s

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 1348 -s 220

Network

N/A

Files

N/A

Analysis: behavioral4

Detonation Overview

Submitted

2024-12-11 03:04

Reported

2024-12-11 03:06

Platform

win10v2004-20241007-en

Max time kernel

148s

Max time network

150s

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 2256 wrote to memory of 984 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2256 wrote to memory of 984 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2256 wrote to memory of 984 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 364 -p 984 -ip 984

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 984 -s 612

Network

Country Destination Domain Proto
US 8.8.8.8:53 196.249.167.52.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 8.8.8.8:53 212.20.149.52.in-addr.arpa udp
US 8.8.8.8:53 241.42.69.40.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 43.229.111.52.in-addr.arpa udp

Files

N/A