Malware Analysis Report

2024-11-13 18:25

Sample ID 241109-dg89qsymen
Target 77cd5e37fd759566b262dce60393c61a32d254db209c5752ab54b07bdf564a4b.dll
SHA256 77cd5e37fd759566b262dce60393c61a32d254db209c5752ab54b07bdf564a4b
Tags
grandoreiro banker discovery trojan
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

77cd5e37fd759566b262dce60393c61a32d254db209c5752ab54b07bdf564a4b

Threat Level: Known bad

The file 77cd5e37fd759566b262dce60393c61a32d254db209c5752ab54b07bdf564a4b.dll was found to be: Known bad.

Malicious Activity Summary

grandoreiro banker discovery trojan

Grandoreiro family

Detects Grandoreiro payload

Grandoreiro

Program crash

System Location Discovery: System Language Discovery

Unsigned PE

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-11-09 03:00

Signatures

Detects Grandoreiro payload

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

Grandoreiro family

grandoreiro

Unsigned PE

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

Analysis: behavioral2

Detonation Overview

Submitted

2024-11-09 02:59

Reported

2024-11-09 03:02

Platform

win10v2004-20241007-en

Max time kernel

93s

Max time network

140s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\77cd5e37fd759566b262dce60393c61a32d254db209c5752ab54b07bdf564a4b.dll,#1

Signatures

Detects Grandoreiro payload

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

Grandoreiro

trojan banker grandoreiro

Grandoreiro family

grandoreiro

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 4048 wrote to memory of 3896 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 4048 wrote to memory of 3896 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 4048 wrote to memory of 3896 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\77cd5e37fd759566b262dce60393c61a32d254db209c5752ab54b07bdf564a4b.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\77cd5e37fd759566b262dce60393c61a32d254db209c5752ab54b07bdf564a4b.dll,#1

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 3896 -ip 3896

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 3896 -s 748

Network

Country Destination Domain Proto
US 8.8.8.8:53 97.17.167.52.in-addr.arpa udp
US 8.8.8.8:53 17.160.190.20.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 8.8.8.8:53 228.249.119.40.in-addr.arpa udp
US 8.8.8.8:53 200.163.202.172.in-addr.arpa udp
US 8.8.8.8:53 241.42.69.40.in-addr.arpa udp
US 8.8.8.8:53 69.190.18.2.in-addr.arpa udp
US 8.8.8.8:53 172.214.232.199.in-addr.arpa udp
US 8.8.8.8:53 107.209.201.84.in-addr.arpa udp
US 8.8.8.8:53 14.227.111.52.in-addr.arpa udp

Files

memory/3896-0-0x0000000002BA0000-0x0000000004A5D000-memory.dmp

Analysis: behavioral1

Detonation Overview

Submitted

2024-11-09 02:59

Reported

2024-11-09 03:02

Platform

win7-20240903-en

Max time kernel

122s

Max time network

124s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\77cd5e37fd759566b262dce60393c61a32d254db209c5752ab54b07bdf564a4b.dll,#1

Signatures

Detects Grandoreiro payload

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

Grandoreiro

trojan banker grandoreiro

Grandoreiro family

grandoreiro

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 1660 wrote to memory of 1812 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1660 wrote to memory of 1812 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1660 wrote to memory of 1812 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1660 wrote to memory of 1812 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1660 wrote to memory of 1812 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1660 wrote to memory of 1812 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1660 wrote to memory of 1812 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\77cd5e37fd759566b262dce60393c61a32d254db209c5752ab54b07bdf564a4b.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\77cd5e37fd759566b262dce60393c61a32d254db209c5752ab54b07bdf564a4b.dll,#1

Network

N/A

Files

memory/1812-0-0x00000000022E0000-0x000000000419D000-memory.dmp