Malware Analysis Report

2024-11-13 18:25

Sample ID 241108-rz96mstjds
Target 03703538020f226e3a93c3e4bc98a9e72c3766d1.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 03703538020f226e3a93c3e4bc98a9e72c3766d1.dll was found to be: Known bad.

Malicious Activity Summary

grandoreiro banker discovery trojan

Detects Grandoreiro payload

Grandoreiro

Grandoreiro family

Unsigned PE

Enumerates physical storage devices

System Location Discovery: System Language Discovery

Suspicious use of WriteProcessMemory

Suspicious behavior: EnumeratesProcesses

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-11-08 14:39

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

2024-11-08 14:39

Reported

2024-11-08 14:41

Platform

win7-20241023-en

Max time kernel

119s

Max time network

122s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\03703538020f226e3a93c3e4bc98a9e72c3766d1.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

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

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2064 wrote to memory of 2416 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2064 wrote to memory of 2416 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2064 wrote to memory of 2416 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2064 wrote to memory of 2416 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2064 wrote to memory of 2416 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2064 wrote to memory of 2416 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2064 wrote to memory of 2416 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\03703538020f226e3a93c3e4bc98a9e72c3766d1.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\03703538020f226e3a93c3e4bc98a9e72c3766d1.dll,#1

Network

N/A

Files

memory/2416-0-0x0000000002070000-0x0000000003F2D000-memory.dmp

memory/2416-1-0x0000000000140000-0x0000000000141000-memory.dmp

memory/2416-30-0x0000000000220000-0x0000000000221000-memory.dmp

memory/2416-28-0x0000000000220000-0x0000000000221000-memory.dmp

memory/2416-25-0x00000000001D0000-0x00000000001D1000-memory.dmp

memory/2416-23-0x00000000001D0000-0x00000000001D1000-memory.dmp

memory/2416-20-0x0000000000180000-0x0000000000181000-memory.dmp

memory/2416-18-0x0000000000180000-0x0000000000181000-memory.dmp

memory/2416-15-0x0000000000170000-0x0000000000171000-memory.dmp

memory/2416-13-0x0000000000170000-0x0000000000171000-memory.dmp

memory/2416-10-0x0000000000160000-0x0000000000161000-memory.dmp

memory/2416-8-0x0000000000160000-0x0000000000161000-memory.dmp

memory/2416-6-0x0000000000160000-0x0000000000161000-memory.dmp

memory/2416-5-0x0000000000140000-0x0000000000141000-memory.dmp

memory/2416-3-0x0000000000140000-0x0000000000141000-memory.dmp

memory/2416-31-0x0000000002070000-0x0000000003F2D000-memory.dmp

memory/2416-32-0x00000000003D0000-0x00000000003D1000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-11-08 14:39

Reported

2024-11-08 14:41

Platform

win10v2004-20241007-en

Max time kernel

92s

Max time network

145s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\03703538020f226e3a93c3e4bc98a9e72c3766d1.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

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
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 1832 wrote to memory of 3980 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1832 wrote to memory of 3980 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1832 wrote to memory of 3980 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\03703538020f226e3a93c3e4bc98a9e72c3766d1.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\03703538020f226e3a93c3e4bc98a9e72c3766d1.dll,#1

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 58.55.71.13.in-addr.arpa udp
US 8.8.8.8:53 138.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 149.220.183.52.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 98.117.19.2.in-addr.arpa udp
US 8.8.8.8:53 83.210.23.2.in-addr.arpa udp

Files

memory/3980-0-0x00000000022B0000-0x000000000416D000-memory.dmp

memory/3980-7-0x0000000000C30000-0x0000000000C31000-memory.dmp

memory/3980-6-0x0000000000C20000-0x0000000000C21000-memory.dmp

memory/3980-5-0x0000000000C10000-0x0000000000C11000-memory.dmp

memory/3980-4-0x00000000009A0000-0x00000000009A1000-memory.dmp

memory/3980-3-0x0000000000990000-0x0000000000991000-memory.dmp

memory/3980-2-0x0000000000980000-0x0000000000981000-memory.dmp

memory/3980-1-0x00000000022B0000-0x000000000416D000-memory.dmp

memory/3980-9-0x0000000003349000-0x0000000003EF9000-memory.dmp

memory/3980-8-0x00000000022B0000-0x000000000416D000-memory.dmp

memory/3980-10-0x00000000022B0000-0x000000000416D000-memory.dmp

memory/3980-11-0x00000000022B0000-0x000000000416D000-memory.dmp