Malware Analysis Report

2025-04-03 14:27

Sample ID 241219-bjt7gs1lhm
Target a79ab2fcbf81f4b4dd999281fbc4294fe51e990f98f8529ca517ee8bcd9d6c43
SHA256 a79ab2fcbf81f4b4dd999281fbc4294fe51e990f98f8529ca517ee8bcd9d6c43
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: behavioral5

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral6

Detonation Overview

Command Line

Signatures

Processes

Network

Files

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

a79ab2fcbf81f4b4dd999281fbc4294fe51e990f98f8529ca517ee8bcd9d6c43

Threat Level: Known bad

The file a79ab2fcbf81f4b4dd999281fbc4294fe51e990f98f8529ca517ee8bcd9d6c43 was found to be: Known bad.

Malicious Activity Summary

discovery agenttesla guloader downloader keylogger spyware stealer trojan

AgentTesla

Agenttesla family

Guloader family

Guloader,Cloudeye

Loads dropped DLL

Reads user/profile data of web browsers

Reads user/profile data of local email clients

Reads WinSCP keys stored on the system

Reads data files stored by FTP clients

Looks up external IP address via web service

Suspicious use of NtSetInformationThreadHideFromDebugger

Suspicious use of NtCreateThreadExHideFromDebugger

Suspicious use of SetThreadContext

Drops file in Windows directory

Unsigned PE

System Location Discovery: System Language Discovery

Program crash

Enumerates physical storage devices

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

Suspicious behavior: MapViewOfSection

Suspicious behavior: EnumeratesProcesses

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-12-19 01:10

Signatures

Unsigned PE

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

Analysis: behavioral5

Detonation Overview

Submitted

2024-12-19 01:10

Reported

2024-12-19 01:13

Platform

win7-20240903-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 1804 -s 220

Network

N/A

Files

N/A

Analysis: behavioral6

Detonation Overview

Submitted

2024-12-19 01:10

Reported

2024-12-19 01:13

Platform

win10v2004-20241007-en

Max time kernel

95s

Max time network

96s

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 4316 wrote to memory of 1344 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 4316 wrote to memory of 1344 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 4316 wrote to memory of 1344 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 1344 -ip 1344

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 1344 -s 612

Network

Country Destination Domain Proto
US 8.8.8.8:53 28.118.140.52.in-addr.arpa udp
US 8.8.8.8:53 182.129.81.91.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 0.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 58.55.71.13.in-addr.arpa udp
US 8.8.8.8:53 212.20.149.52.in-addr.arpa udp
US 8.8.8.8:53 206.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 88.210.23.2.in-addr.arpa udp
US 8.8.8.8:53 181.129.81.91.in-addr.arpa udp
US 8.8.8.8:53 13.227.111.52.in-addr.arpa udp

Files

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-12-19 01:10

Reported

2024-12-19 01:13

Platform

win7-20240903-en

Max time kernel

121s

Max time network

122s

Command Line

"C:\Users\Admin\AppData\Local\Temp\PO 0309494059506060609696007.exe"

Signatures

Drops file in Windows directory

Description Indicator Process Target
File opened for modification C:\Windows\locale\Indviklingerne.ini C:\Users\Admin\AppData\Local\Temp\PO 0309494059506060609696007.exe N/A
File opened for modification C:\Windows\resources\havarierne\firmamrke.kna C:\Users\Admin\AppData\Local\Temp\PO 0309494059506060609696007.exe N/A
File opened for modification C:\Windows\resources\0409\tripennate\Funktionrgruppes19.has C:\Users\Admin\AppData\Local\Temp\PO 0309494059506060609696007.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\PO 0309494059506060609696007.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\PO 0309494059506060609696007.exe

"C:\Users\Admin\AppData\Local\Temp\PO 0309494059506060609696007.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 1808 -s 28

Network

N/A

Files

\Users\Admin\AppData\Local\Temp\nsj7F6E.tmp\System.dll

MD5 0d7ad4f45dc6f5aa87f606d0331c6901
SHA1 48df0911f0484cbe2a8cdd5362140b63c41ee457
SHA256 3eb38ae99653a7dbc724132ee240f6e5c4af4bfe7c01d31d23faf373f9f2eaca
SHA512 c07de7308cb54205e8bd703001a7fe4fd7796c9ac1b4bb330c77c872bf712b093645f40b80ce7127531fe6746a5b66e18ea073ab6a644934abed9bb64126fea9

\Users\Admin\AppData\Local\Temp\nsj7F6E.tmp\LangDLL.dll

MD5 ab1db56369412fe8476fefffd11e4cc0
SHA1 daad036a83b2ee2fa86d840a34a341100552e723
SHA256 6f14c8f01f50a30743dac68c5ac813451463dfb427eb4e35fcdfe2410e1a913b
SHA512 8d886643b4fc24adf78f76b663227d6e61863f89e0cbd49548f40dd040666ca94ea46bec9e336850e4f300995d56e6dc85b689c8e09ff46758822d280f06b03d

memory/1808-34-0x0000000003560000-0x00000000048DF000-memory.dmp

memory/1808-35-0x0000000003560000-0x00000000048DF000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-12-19 01:10

Reported

2024-12-19 01:13

Platform

win10v2004-20241007-en

Max time kernel

141s

Max time network

151s

Command Line

"C:\Users\Admin\AppData\Local\Temp\PO 0309494059506060609696007.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

Looks up external IP address via web service

Description Indicator Process Target
N/A api.ipify.org N/A N/A
N/A api.ipify.org N/A N/A

Suspicious use of NtCreateThreadExHideFromDebugger

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\PO 0309494059506060609696007.exe N/A

Suspicious use of NtSetInformationThreadHideFromDebugger

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\PO 0309494059506060609696007.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\PO 0309494059506060609696007.exe N/A

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 3840 set thread context of 1088 N/A C:\Users\Admin\AppData\Local\Temp\PO 0309494059506060609696007.exe C:\Users\Admin\AppData\Local\Temp\PO 0309494059506060609696007.exe

Drops file in Windows directory

Description Indicator Process Target
File opened for modification C:\Windows\locale\Indviklingerne.ini C:\Users\Admin\AppData\Local\Temp\PO 0309494059506060609696007.exe N/A
File opened for modification C:\Windows\resources\havarierne\firmamrke.kna C:\Users\Admin\AppData\Local\Temp\PO 0309494059506060609696007.exe N/A
File opened for modification C:\Windows\resources\0409\tripennate\Funktionrgruppes19.has C:\Users\Admin\AppData\Local\Temp\PO 0309494059506060609696007.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\PO 0309494059506060609696007.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\PO 0309494059506060609696007.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\PO 0309494059506060609696007.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\PO 0309494059506060609696007.exe N/A

Suspicious behavior: MapViewOfSection

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\PO 0309494059506060609696007.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\PO 0309494059506060609696007.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\PO 0309494059506060609696007.exe

"C:\Users\Admin\AppData\Local\Temp\PO 0309494059506060609696007.exe"

C:\Users\Admin\AppData\Local\Temp\PO 0309494059506060609696007.exe

"C:\Users\Admin\AppData\Local\Temp\PO 0309494059506060609696007.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 58.55.71.13.in-addr.arpa udp
US 8.8.8.8:53 83.210.23.2.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
NL 84.38.133.48:80 84.38.133.48 tcp
US 8.8.8.8:53 48.133.38.84.in-addr.arpa udp
US 8.8.8.8:53 api.ipify.org udp
US 172.67.74.152:443 api.ipify.org tcp
US 8.8.8.8:53 152.74.67.172.in-addr.arpa udp
US 8.8.8.8:53 56.163.245.4.in-addr.arpa udp
US 8.8.8.8:53 206.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 209.205.72.20.in-addr.arpa udp
US 8.8.8.8:53 196.190.18.2.in-addr.arpa udp
US 8.8.8.8:53 104.219.191.52.in-addr.arpa udp
US 8.8.8.8:53 85.49.80.91.in-addr.arpa udp
US 8.8.8.8:53 88.210.23.2.in-addr.arpa udp

Files

C:\Users\Admin\AppData\Local\Temp\nswA317.tmp\System.dll

MD5 0d7ad4f45dc6f5aa87f606d0331c6901
SHA1 48df0911f0484cbe2a8cdd5362140b63c41ee457
SHA256 3eb38ae99653a7dbc724132ee240f6e5c4af4bfe7c01d31d23faf373f9f2eaca
SHA512 c07de7308cb54205e8bd703001a7fe4fd7796c9ac1b4bb330c77c872bf712b093645f40b80ce7127531fe6746a5b66e18ea073ab6a644934abed9bb64126fea9

C:\Users\Admin\AppData\Local\Temp\nswA317.tmp\LangDLL.dll

MD5 ab1db56369412fe8476fefffd11e4cc0
SHA1 daad036a83b2ee2fa86d840a34a341100552e723
SHA256 6f14c8f01f50a30743dac68c5ac813451463dfb427eb4e35fcdfe2410e1a913b
SHA512 8d886643b4fc24adf78f76b663227d6e61863f89e0cbd49548f40dd040666ca94ea46bec9e336850e4f300995d56e6dc85b689c8e09ff46758822d280f06b03d

memory/3840-28-0x0000000004210000-0x000000000558F000-memory.dmp

memory/3840-29-0x0000000077861000-0x0000000077981000-memory.dmp

memory/3840-30-0x0000000004210000-0x000000000558F000-memory.dmp

memory/1088-31-0x00000000016E0000-0x0000000002A5F000-memory.dmp

memory/1088-32-0x00000000778E8000-0x00000000778E9000-memory.dmp

memory/1088-33-0x0000000077905000-0x0000000077906000-memory.dmp

memory/1088-34-0x00000000016E0000-0x0000000002A5F000-memory.dmp

memory/1088-35-0x0000000000480000-0x00000000016D4000-memory.dmp

memory/1088-36-0x0000000000480000-0x00000000004C2000-memory.dmp

memory/1088-37-0x00000000353D0000-0x0000000035974000-memory.dmp

memory/1088-38-0x0000000035AF0000-0x0000000035B56000-memory.dmp

memory/1088-40-0x0000000077861000-0x0000000077981000-memory.dmp

memory/1088-42-0x00000000363F0000-0x0000000036440000-memory.dmp

memory/1088-43-0x0000000036440000-0x00000000364D2000-memory.dmp

memory/1088-44-0x0000000036510000-0x000000003651A000-memory.dmp

Analysis: behavioral3

Detonation Overview

Submitted

2024-12-19 01:10

Reported

2024-12-19 01:13

Platform

win7-20240903-en

Max time kernel

121s

Max time network

122s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\$PLUGINSDIR\LangDLL.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\LangDLL.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\$PLUGINSDIR\LangDLL.dll,#1

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 3016 -s 220

Network

N/A

Files

N/A

Analysis: behavioral4

Detonation Overview

Submitted

2024-12-19 01:10

Reported

2024-12-19 01:13

Platform

win10v2004-20241007-en

Max time kernel

96s

Max time network

141s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\$PLUGINSDIR\LangDLL.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 2032 wrote to memory of 4752 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2032 wrote to memory of 4752 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2032 wrote to memory of 4752 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\LangDLL.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\$PLUGINSDIR\LangDLL.dll,#1

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 4752 -ip 4752

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 4752 -s 600

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 88.210.23.2.in-addr.arpa udp
US 8.8.8.8:53 196.249.167.52.in-addr.arpa udp
US 8.8.8.8:53 73.31.126.40.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 228.249.119.40.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 18.31.95.13.in-addr.arpa udp
US 8.8.8.8:53 220.190.18.2.in-addr.arpa udp
US 8.8.8.8:53 172.214.232.199.in-addr.arpa udp
US 8.8.8.8:53 11.227.111.52.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp

Files

N/A