Malware Analysis Report

2025-08-06 01:41

Sample ID 241005-cbbwlsshlf
Target b9d10140a4b19ca6327d7e319cf9bd88c897cdb7440b08bb9a82aebae1817e64N
SHA256 b9d10140a4b19ca6327d7e319cf9bd88c897cdb7440b08bb9a82aebae1817e64
Tags
ramnit banker discovery spyware stealer trojan upx worm
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

b9d10140a4b19ca6327d7e319cf9bd88c897cdb7440b08bb9a82aebae1817e64

Threat Level: Known bad

The file b9d10140a4b19ca6327d7e319cf9bd88c897cdb7440b08bb9a82aebae1817e64N was found to be: Known bad.

Malicious Activity Summary

ramnit banker discovery spyware stealer trojan upx worm

Ramnit

Executes dropped EXE

Loads dropped DLL

Drops file in System32 directory

UPX packed file

System Location Discovery: System Language Discovery

Program crash

Unsigned PE

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-10-05 01:53

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-10-05 01:53

Reported

2024-10-05 01:55

Platform

win7-20240903-en

Max time kernel

16s

Max time network

16s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\b9d10140a4b19ca6327d7e319cf9bd88c897cdb7440b08bb9a82aebae1817e64N.dll,#1

Signatures

Ramnit

trojan spyware stealer worm banker ramnit

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\rundll32mgr.exe N/A

Loads dropped DLL

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\rundll32mgr.exe N/A
N/A N/A C:\Windows\SysWOW64\rundll32mgr.exe N/A

Drops file in System32 directory

Description Indicator Process Target
File created C:\Windows\SysWOW64\rundll32mgr.exe C:\Windows\SysWOW64\rundll32.exe N/A

UPX packed file

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

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
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\rundll32mgr.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2136 wrote to memory of 1860 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2136 wrote to memory of 1860 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2136 wrote to memory of 1860 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2136 wrote to memory of 1860 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2136 wrote to memory of 1860 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2136 wrote to memory of 1860 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2136 wrote to memory of 1860 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1860 wrote to memory of 2276 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\rundll32mgr.exe
PID 1860 wrote to memory of 2276 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\rundll32mgr.exe
PID 1860 wrote to memory of 2276 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\rundll32mgr.exe
PID 1860 wrote to memory of 2276 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\rundll32mgr.exe
PID 1860 wrote to memory of 1880 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\WerFault.exe
PID 1860 wrote to memory of 1880 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\WerFault.exe
PID 1860 wrote to memory of 1880 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\WerFault.exe
PID 1860 wrote to memory of 1880 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\WerFault.exe

Processes

C:\Windows\system32\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\b9d10140a4b19ca6327d7e319cf9bd88c897cdb7440b08bb9a82aebae1817e64N.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\b9d10140a4b19ca6327d7e319cf9bd88c897cdb7440b08bb9a82aebae1817e64N.dll,#1

C:\Windows\SysWOW64\rundll32mgr.exe

C:\Windows\SysWOW64\rundll32mgr.exe

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 1860 -s 232

Network

N/A

Files

memory/1860-1-0x0000000010000000-0x0000000010089000-memory.dmp

\Windows\SysWOW64\rundll32mgr.exe

MD5 797ea3998080a8d64bd071ac749c2285
SHA1 24e7d2db6d27265a936c72b16a14b31910a55df6
SHA256 cc2bd6be44d951965e960882aa128f0aa18e805e33a4cf99952ca5387007a1a5
SHA512 8656020cd52e46902058ce6eca6d823e8a84228cef10c30af05c48353c159e510baed333e19c29d25bd9e6e0a5bcdcfa1dcf053cf8544ad4bfe11392efdc088c

memory/1860-0-0x0000000010000000-0x0000000010089000-memory.dmp

memory/1860-4-0x0000000010000000-0x0000000010089000-memory.dmp

memory/2276-13-0x0000000000400000-0x000000000042D000-memory.dmp

memory/2276-12-0x0000000001D90000-0x0000000001E50000-memory.dmp

\Users\Admin\AppData\Local\Temp\~TMA100.tmp

MD5 d124f55b9393c976963407dff51ffa79
SHA1 2c7bbedd79791bfb866898c85b504186db610b5d
SHA256 ea1e16247c848c8c171c4cd1fa17bc5a018a1fcb0c0dac25009066b6667b8eef
SHA512 278fe3a4b1fbbe700e4f4483b610133e975e36e101455661d5197bd892a68839b9d555499040d200c92aefa9e3819380e395c0cd85d5fc845c6364d128a8cf06

\Users\Admin\AppData\Local\Temp\~TMA140.tmp

MD5 9b98d47916ead4f69ef51b56b0c2323c
SHA1 290a80b4ded0efc0fd00816f373fcea81a521330
SHA256 96e0ae104c9662d0d20fdf59844c2d18334e5847b6c4fc7f8ce4b3b87f39887b
SHA512 68b67021f228d8d71df4deb0b6388558b2f935a6aa466a12199cd37ada47ee588ea407b278d190d3a498b0ef3f5f1a2573a469b7ea5561ab2e7055c45565fe94

memory/2276-19-0x0000000000400000-0x000000000042D000-memory.dmp

memory/1860-20-0x0000000010000000-0x0000000010089000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-10-05 01:53

Reported

2024-10-05 01:55

Platform

win10v2004-20240802-en

Max time kernel

95s

Max time network

95s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\b9d10140a4b19ca6327d7e319cf9bd88c897cdb7440b08bb9a82aebae1817e64N.dll,#1

Signatures

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\rundll32mgr.exe N/A

Drops file in System32 directory

Description Indicator Process Target
File created C:\Windows\SysWOW64\rundll32mgr.exe C:\Windows\SysWOW64\rundll32.exe N/A

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
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\rundll32mgr.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 4612 wrote to memory of 2716 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 4612 wrote to memory of 2716 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 4612 wrote to memory of 2716 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2716 wrote to memory of 2008 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\rundll32mgr.exe
PID 2716 wrote to memory of 2008 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\rundll32mgr.exe
PID 2716 wrote to memory of 2008 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\rundll32mgr.exe

Processes

C:\Windows\system32\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\b9d10140a4b19ca6327d7e319cf9bd88c897cdb7440b08bb9a82aebae1817e64N.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\b9d10140a4b19ca6327d7e319cf9bd88c897cdb7440b08bb9a82aebae1817e64N.dll,#1

C:\Windows\SysWOW64\rundll32mgr.exe

C:\Windows\SysWOW64\rundll32mgr.exe

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 2716 -ip 2716

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 460 -p 2008 -ip 2008

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2716 -s 636

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2008 -s 400

Network

Country Destination Domain Proto
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 209.205.72.20.in-addr.arpa udp
US 8.8.8.8:53 172.214.232.199.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 75.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 58.55.71.13.in-addr.arpa udp
US 8.8.8.8:53 104.219.191.52.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 8.8.8.8:53 240.221.184.93.in-addr.arpa udp
US 8.8.8.8:53 88.210.23.2.in-addr.arpa udp
US 8.8.8.8:53 13.227.111.52.in-addr.arpa udp

Files

memory/2716-0-0x0000000010000000-0x0000000010089000-memory.dmp

C:\Windows\SysWOW64\rundll32mgr.exe

MD5 797ea3998080a8d64bd071ac749c2285
SHA1 24e7d2db6d27265a936c72b16a14b31910a55df6
SHA256 cc2bd6be44d951965e960882aa128f0aa18e805e33a4cf99952ca5387007a1a5
SHA512 8656020cd52e46902058ce6eca6d823e8a84228cef10c30af05c48353c159e510baed333e19c29d25bd9e6e0a5bcdcfa1dcf053cf8544ad4bfe11392efdc088c

memory/2716-5-0x0000000010000000-0x0000000010089000-memory.dmp