Malware Analysis Report

2024-11-13 18:25

Sample ID 241109-ck32fsxndp
Target 10fc720a537810eb0491d795e54f8c97d4b4fb2d6ac863de2e628fdf2ffae892.dll
SHA256 10fc720a537810eb0491d795e54f8c97d4b4fb2d6ac863de2e628fdf2ffae892
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: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

10fc720a537810eb0491d795e54f8c97d4b4fb2d6ac863de2e628fdf2ffae892

Threat Level: Known bad

The file 10fc720a537810eb0491d795e54f8c97d4b4fb2d6ac863de2e628fdf2ffae892.dll was found to be: Known bad.

Malicious Activity Summary

grandoreiro banker discovery trojan

Grandoreiro

Detects Grandoreiro payload

Grandoreiro family

Enumerates physical storage devices

Unsigned PE

System Location Discovery: System Language Discovery

Program crash

Suspicious behavior: EnumeratesProcesses

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-11-09 02:09

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: behavioral1

Detonation Overview

Submitted

2024-11-09 02:08

Reported

2024-11-09 02:11

Platform

win7-20240729-en

Max time kernel

118s

Max time network

121s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\10fc720a537810eb0491d795e54f8c97d4b4fb2d6ac863de2e628fdf2ffae892.dll,#1

Signatures

Detects Grandoreiro payload

Description Indicator Process Target
N/A N/A N/A N/A
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 behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\rundll32.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1100 wrote to memory of 2084 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1100 wrote to memory of 2084 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1100 wrote to memory of 2084 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1100 wrote to memory of 2084 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1100 wrote to memory of 2084 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1100 wrote to memory of 2084 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1100 wrote to memory of 2084 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\10fc720a537810eb0491d795e54f8c97d4b4fb2d6ac863de2e628fdf2ffae892.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\10fc720a537810eb0491d795e54f8c97d4b4fb2d6ac863de2e628fdf2ffae892.dll,#1

Network

N/A

Files

memory/2084-0-0x0000000002210000-0x00000000040CD000-memory.dmp

memory/2084-1-0x0000000000180000-0x0000000000181000-memory.dmp

memory/2084-30-0x00000000001F0000-0x00000000001F1000-memory.dmp

memory/2084-28-0x00000000001F0000-0x00000000001F1000-memory.dmp

memory/2084-25-0x00000000001E0000-0x00000000001E1000-memory.dmp

memory/2084-23-0x00000000001E0000-0x00000000001E1000-memory.dmp

memory/2084-20-0x00000000001C0000-0x00000000001C1000-memory.dmp

memory/2084-18-0x00000000001C0000-0x00000000001C1000-memory.dmp

memory/2084-15-0x00000000001B0000-0x00000000001B1000-memory.dmp

memory/2084-13-0x00000000001B0000-0x00000000001B1000-memory.dmp

memory/2084-10-0x00000000001A0000-0x00000000001A1000-memory.dmp

memory/2084-8-0x00000000001A0000-0x00000000001A1000-memory.dmp

memory/2084-6-0x00000000001A0000-0x00000000001A1000-memory.dmp

memory/2084-5-0x0000000000180000-0x0000000000181000-memory.dmp

memory/2084-3-0x0000000000180000-0x0000000000181000-memory.dmp

memory/2084-31-0x0000000002210000-0x00000000040CD000-memory.dmp

memory/2084-32-0x0000000000720000-0x0000000000721000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-11-09 02:08

Reported

2024-11-09 02:11

Platform

win10v2004-20241007-en

Max time kernel

92s

Max time network

137s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\10fc720a537810eb0491d795e54f8c97d4b4fb2d6ac863de2e628fdf2ffae892.dll,#1

Signatures

Detects Grandoreiro payload

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

Grandoreiro

trojan banker grandoreiro

Grandoreiro family

grandoreiro

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:\Windows\SysWOW64\rundll32.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\rundll32.exe N/A
N/A N/A C:\Windows\SysWOW64\rundll32.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 4836 wrote to memory of 1888 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 4836 wrote to memory of 1888 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 4836 wrote to memory of 1888 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1888 wrote to memory of 1084 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\splwow64.exe
PID 1888 wrote to memory of 1084 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\splwow64.exe

Processes

C:\Windows\system32\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\10fc720a537810eb0491d795e54f8c97d4b4fb2d6ac863de2e628fdf2ffae892.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\10fc720a537810eb0491d795e54f8c97d4b4fb2d6ac863de2e628fdf2ffae892.dll,#1

C:\Windows\splwow64.exe

C:\Windows\splwow64.exe 12288

C:\Windows\system32\svchost.exe

C:\Windows\system32\svchost.exe -k PrintWorkflow -s PrintWorkflowUserSvc

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 1888 -ip 1888

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 1888 -s 968

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 532 -p 1888 -ip 1888

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 1888 -s 968

Network

Country Destination Domain Proto
US 8.8.8.8:53 232.168.11.51.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 72.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 13.86.106.20.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 22.236.111.52.in-addr.arpa udp
US 8.8.8.8:53 77.190.18.2.in-addr.arpa udp

Files

memory/1888-0-0x00000000027E0000-0x000000000469D000-memory.dmp

memory/1888-9-0x0000000003879000-0x0000000004429000-memory.dmp

memory/1888-1-0x00000000027E0000-0x000000000469D000-memory.dmp

memory/1888-7-0x0000000004870000-0x0000000004871000-memory.dmp

memory/1888-8-0x00000000027E0000-0x000000000469D000-memory.dmp

memory/1888-6-0x0000000004850000-0x0000000004851000-memory.dmp

memory/1888-5-0x0000000004840000-0x0000000004841000-memory.dmp

memory/1888-4-0x00000000011B0000-0x00000000011B1000-memory.dmp

memory/1888-3-0x0000000000F10000-0x0000000000F11000-memory.dmp

memory/1888-2-0x0000000000F00000-0x0000000000F01000-memory.dmp

memory/1888-10-0x00000000027E0000-0x000000000469D000-memory.dmp

memory/1888-11-0x00000000027E0000-0x000000000469D000-memory.dmp

memory/1888-12-0x00000000027E0000-0x000000000469D000-memory.dmp