Malware Analysis Report

2025-04-03 14:26

Sample ID 241216-sca9gatjbw
Target ec4562d09b3edf75e64d238ee5e39d86d76d02baa1cb5b51cf81fae4420dd3e5N.exe
SHA256 ec4562d09b3edf75e64d238ee5e39d86d76d02baa1cb5b51cf81fae4420dd3e5
Tags
discovery agenttesla guloader downloader keylogger spyware stealer trojan
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

ec4562d09b3edf75e64d238ee5e39d86d76d02baa1cb5b51cf81fae4420dd3e5

Threat Level: Known bad

The file ec4562d09b3edf75e64d238ee5e39d86d76d02baa1cb5b51cf81fae4420dd3e5N.exe was found to be: Known bad.

Malicious Activity Summary

discovery agenttesla guloader downloader keylogger spyware stealer trojan

AgentTesla

Agenttesla family

Guloader,Cloudeye

Guloader family

Loads dropped DLL

Reads data files stored by FTP clients

Reads user/profile data of local email clients

Reads WinSCP keys stored on the system

Reads user/profile data of web browsers

Legitimate hosting services abused for malware hosting/C2

Suspicious use of NtSetInformationThreadHideFromDebugger

Suspicious use of SetThreadContext

Suspicious use of NtCreateThreadExHideFromDebugger

Unsigned PE

Program crash

Enumerates physical storage devices

System Location Discovery: System Language Discovery

Suspicious behavior: EnumeratesProcesses

Suspicious use of WriteProcessMemory

Suspicious use of AdjustPrivilegeToken

Suspicious behavior: MapViewOfSection

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-12-16 14:58

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-12-16 14:58

Reported

2024-12-16 15:00

Platform

win7-20240903-en

Max time kernel

117s

Max time network

117s

Command Line

"C:\Users\Admin\AppData\Local\Temp\ec4562d09b3edf75e64d238ee5e39d86d76d02baa1cb5b51cf81fae4420dd3e5N.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\ec4562d09b3edf75e64d238ee5e39d86d76d02baa1cb5b51cf81fae4420dd3e5N.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\ec4562d09b3edf75e64d238ee5e39d86d76d02baa1cb5b51cf81fae4420dd3e5N.exe

"C:\Users\Admin\AppData\Local\Temp\ec4562d09b3edf75e64d238ee5e39d86d76d02baa1cb5b51cf81fae4420dd3e5N.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2168 -s 516

Network

N/A

Files

\Users\Admin\AppData\Local\Temp\nst44CE.tmp\System.dll

MD5 192639861e3dc2dc5c08bb8f8c7260d5
SHA1 58d30e460609e22fa0098bc27d928b689ef9af78
SHA256 23d618a0293c78ce00f7c6e6dd8b8923621da7dd1f63a070163ef4c0ec3033d6
SHA512 6e573d8b2ef6ed719e271fd0b2fd9cd451f61fc9a9459330108d6d7a65a0f64016303318cad787aa1d5334ba670d8f1c7c13074e1be550b4a316963ecc465cdc

memory/2168-13-0x0000000003760000-0x0000000005046000-memory.dmp

memory/2168-14-0x0000000003760000-0x0000000005046000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-12-16 14:58

Reported

2024-12-16 15:00

Platform

win10v2004-20241007-en

Max time kernel

118s

Max time network

98s

Command Line

"C:\Users\Admin\AppData\Local\Temp\ec4562d09b3edf75e64d238ee5e39d86d76d02baa1cb5b51cf81fae4420dd3e5N.exe"

Signatures

AgentTesla

keylogger trojan stealer spyware agenttesla

Agenttesla family

agenttesla

Guloader family

guloader

Guloader,Cloudeye

downloader guloader

Reads WinSCP keys stored on the system

spyware stealer

Reads data files stored by FTP clients

spyware stealer

Reads user/profile data of local email clients

spyware stealer

Reads user/profile data of web browsers

spyware stealer

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\ec4562d09b3edf75e64d238ee5e39d86d76d02baa1cb5b51cf81fae4420dd3e5N.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\ec4562d09b3edf75e64d238ee5e39d86d76d02baa1cb5b51cf81fae4420dd3e5N.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\ec4562d09b3edf75e64d238ee5e39d86d76d02baa1cb5b51cf81fae4420dd3e5N.exe N/A

Suspicious behavior: MapViewOfSection

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\ec4562d09b3edf75e64d238ee5e39d86d76d02baa1cb5b51cf81fae4420dd3e5N.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\ec4562d09b3edf75e64d238ee5e39d86d76d02baa1cb5b51cf81fae4420dd3e5N.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\ec4562d09b3edf75e64d238ee5e39d86d76d02baa1cb5b51cf81fae4420dd3e5N.exe

"C:\Users\Admin\AppData\Local\Temp\ec4562d09b3edf75e64d238ee5e39d86d76d02baa1cb5b51cf81fae4420dd3e5N.exe"

C:\Users\Admin\AppData\Local\Temp\ec4562d09b3edf75e64d238ee5e39d86d76d02baa1cb5b51cf81fae4420dd3e5N.exe

"C:\Users\Admin\AppData\Local\Temp\ec4562d09b3edf75e64d238ee5e39d86d76d02baa1cb5b51cf81fae4420dd3e5N.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 228.249.119.40.in-addr.arpa udp
US 8.8.8.8:53 76.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 drive.google.com udp
FR 142.250.75.238:443 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
FR 142.250.179.67:80 o.pki.goog tcp
US 8.8.8.8:53 238.75.250.142.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
FR 142.250.74.225:443 drive.usercontent.google.com tcp
US 8.8.8.8:53 225.74.250.142.in-addr.arpa udp
US 8.8.8.8:53 133.211.185.52.in-addr.arpa udp
US 8.8.8.8:53 13.86.106.20.in-addr.arpa udp
US 8.8.8.8:53 53.210.109.20.in-addr.arpa udp
US 8.8.8.8:53 198.187.3.20.in-addr.arpa udp
US 8.8.8.8:53 217.135.221.88.in-addr.arpa udp
US 8.8.8.8:53 181.129.81.91.in-addr.arpa udp
US 8.8.8.8:53 11.227.111.52.in-addr.arpa udp

Files

C:\Users\Admin\AppData\Local\Temp\nso82DD.tmp\System.dll

MD5 192639861e3dc2dc5c08bb8f8c7260d5
SHA1 58d30e460609e22fa0098bc27d928b689ef9af78
SHA256 23d618a0293c78ce00f7c6e6dd8b8923621da7dd1f63a070163ef4c0ec3033d6
SHA512 6e573d8b2ef6ed719e271fd0b2fd9cd451f61fc9a9459330108d6d7a65a0f64016303318cad787aa1d5334ba670d8f1c7c13074e1be550b4a316963ecc465cdc

memory/1404-11-0x0000000004230000-0x0000000005B16000-memory.dmp

memory/1404-12-0x0000000077121000-0x0000000077241000-memory.dmp

memory/1404-13-0x0000000073D75000-0x0000000073D76000-memory.dmp

memory/1404-14-0x0000000004230000-0x0000000005B16000-memory.dmp

memory/3524-15-0x0000000001700000-0x0000000002FE6000-memory.dmp

memory/3524-16-0x00000000771A8000-0x00000000771A9000-memory.dmp

memory/3524-17-0x00000000771C5000-0x00000000771C6000-memory.dmp

memory/3524-30-0x0000000001700000-0x0000000002FE6000-memory.dmp

memory/3524-31-0x00000000004A0000-0x00000000016F4000-memory.dmp

memory/3524-33-0x00000000004A0000-0x000000000050C000-memory.dmp

memory/3524-34-0x0000000035EB0000-0x0000000036454000-memory.dmp

memory/3524-35-0x00000000337D0000-0x0000000033836000-memory.dmp

memory/3524-37-0x0000000036590000-0x00000000365E0000-memory.dmp

memory/3524-38-0x0000000036850000-0x00000000368E2000-memory.dmp

memory/3524-39-0x0000000036630000-0x000000003663A000-memory.dmp

memory/3524-40-0x0000000077121000-0x0000000077241000-memory.dmp

Analysis: behavioral3

Detonation Overview

Submitted

2024-12-16 14:58

Reported

2024-12-16 15:00

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 2820 -s 220

Network

N/A

Files

N/A

Analysis: behavioral4

Detonation Overview

Submitted

2024-12-16 14:58

Reported

2024-12-16 15:00

Platform

win10v2004-20241007-en

Max time kernel

93s

Max time network

95s

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 2420 wrote to memory of 4412 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2420 wrote to memory of 4412 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2420 wrote to memory of 4412 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 408 -p 4412 -ip 4412

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 4412 -s 612

Network

Country Destination Domain Proto
US 8.8.8.8:53 228.249.119.40.in-addr.arpa udp
US 8.8.8.8:53 101.210.23.2.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 8.8.8.8:53 241.150.49.20.in-addr.arpa udp
US 8.8.8.8:53 196.249.167.52.in-addr.arpa udp
US 8.8.8.8:53 212.20.149.52.in-addr.arpa udp
US 8.8.8.8:53 18.31.95.13.in-addr.arpa udp
US 8.8.8.8:53 88.210.23.2.in-addr.arpa udp
US 8.8.8.8:53 43.229.111.52.in-addr.arpa udp

Files

N/A