Malware Analysis Report

2025-08-10 17:59

Sample ID 240116-mrmcdsaabm
Target 5fb1da1d27e51c036e788d171e641819
SHA256 00b99ea9c4a00742c356b29dee039c17891eb9cef040aec7842b7c38899622b6
Tags
metasploit backdoor persistence trojan upx
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

00b99ea9c4a00742c356b29dee039c17891eb9cef040aec7842b7c38899622b6

Threat Level: Known bad

The file 5fb1da1d27e51c036e788d171e641819 was found to be: Known bad.

Malicious Activity Summary

metasploit backdoor persistence trojan upx

MetaSploit

Deletes itself

Executes dropped EXE

UPX packed file

Checks computer location settings

Adds Run key to start application

Drops file in System32 directory

Enumerates physical storage devices

Unsigned PE

Modifies data under HKEY_USERS

Suspicious use of WriteProcessMemory

Suspicious use of AdjustPrivilegeToken

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-01-16 10:41

Signatures

UPX packed file

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

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-01-16 10:41

Reported

2024-01-16 10:44

Platform

win7-20231215-en

Max time kernel

146s

Max time network

137s

Command Line

"C:\Users\Admin\AppData\Local\Temp\5fb1da1d27e51c036e788d171e641819.exe"

Signatures

MetaSploit

trojan backdoor metasploit

Deletes itself

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

Executes dropped EXE

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

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\MS DLL IN = "C:\\Windows\\SysWOW64\\msdlli.exe" C:\Windows\SysWOW64\msdlli.exe N/A

Drops file in System32 directory

Description Indicator Process Target
File created C:\Windows\SysWOW64\svchost.dll C:\Windows\SysWOW64\msdlli.exe N/A
File opened for modification C:\Windows\SysWOW64\svchost.dll C:\Windows\SysWOW64\msdlli.exe N/A
File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\Temporary Internet Files\counters.dat C:\Windows\SysWOW64\msdlli.exe N/A
File created C:\Windows\SysWOW64\msdlli.exe C:\Users\Admin\AppData\Local\Temp\5fb1da1d27e51c036e788d171e641819.exe N/A
File opened for modification C:\Windows\SysWOW64\msdlli.exe C:\Users\Admin\AppData\Local\Temp\5fb1da1d27e51c036e788d171e641819.exe N/A
File opened for modification C:\Windows\SysWOW64\msdlli.exe C:\Windows\SysWOW64\msdlli.exe N/A

Enumerates physical storage devices

Modifies data under HKEY_USERS

Description Indicator Process Target
Key created \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings C:\Windows\SysWOW64\msdlli.exe N/A
Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Connections C:\Windows\SysWOW64\msdlli.exe N/A
Set value (data) \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\DefaultConnectionSettings = 4600000002000000090000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000 C:\Windows\SysWOW64\msdlli.exe N/A
Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings C:\Windows\SysWOW64\msdlli.exe N/A
Set value (int) \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\ProxyEnable = "0" C:\Windows\SysWOW64\msdlli.exe N/A
Set value (data) \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\SavedLegacySettings = 4600000002000000090000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000 C:\Windows\SysWOW64\msdlli.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\5fb1da1d27e51c036e788d171e641819.exe N/A
Token: SeShutdownPrivilege N/A C:\Users\Admin\AppData\Local\Temp\5fb1da1d27e51c036e788d171e641819.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\SysWOW64\msdlli.exe N/A
Token: SeShutdownPrivilege N/A C:\Windows\SysWOW64\msdlli.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\5fb1da1d27e51c036e788d171e641819.exe

"C:\Users\Admin\AppData\Local\Temp\5fb1da1d27e51c036e788d171e641819.exe"

C:\Windows\SysWOW64\msdlli.exe

C:\Windows\SysWOW64\msdlli.exe

C:\Windows\SysWOW64\cmd.exe

"C:\Windows\system32\cmd.exe" /c del "C:\Users\Admin\AppData\Local\Temp\5FB1DA~1.EXE" >> NUL

Network

Country Destination Domain Proto
US 8.8.8.8:53 n.proxyisp.info udp
US 154.35.64.81:1791 n.proxyisp.info tcp
US 154.35.64.81:1791 n.proxyisp.info tcp
US 154.35.64.81:1791 n.proxyisp.info tcp
US 154.35.64.81:1791 n.proxyisp.info tcp
US 154.35.64.81:1791 n.proxyisp.info tcp
US 154.35.64.81:1791 n.proxyisp.info tcp

Files

memory/1236-0-0x0000000000400000-0x0000000000422000-memory.dmp

C:\Windows\SysWOW64\msdlli.exe

MD5 0473ede26a21f7bb1af7210bcd5729df
SHA1 9f6b1aa5ef4bcc38e9859bb36b12611b070714ed
SHA256 a2384c6cd6c67fbc429d29af3a3892b7318e9adf925e5e9af7f3b9afdfcf3f7a
SHA512 2d3d4c4cb1b6e4494fdd17951c3e9e24bd1db85533eef2a3f5ac1a3818de00c9d7cd3ee58020b67627192655ce24a797e6de73fc83dbbe623b637024a394ec5c

memory/2380-4-0x0000000000400000-0x0000000000422000-memory.dmp

memory/1236-5-0x0000000000400000-0x0000000000422000-memory.dmp

C:\Windows\SysWOW64\msdlli.exe

MD5 d41d8cd98f00b204e9800998ecf8427e
SHA1 da39a3ee5e6b4b0d3255bfef95601890afd80709
SHA256 e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855
SHA512 cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e

memory/2380-9-0x0000000000400000-0x0000000000422000-memory.dmp

memory/2380-11-0x0000000000400000-0x0000000000422000-memory.dmp

memory/2380-15-0x0000000000400000-0x0000000000422000-memory.dmp

memory/2380-17-0x0000000000400000-0x0000000000422000-memory.dmp

memory/2380-19-0x0000000000400000-0x0000000000422000-memory.dmp

memory/2380-22-0x0000000000400000-0x0000000000422000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-01-16 10:41

Reported

2024-01-16 10:44

Platform

win10v2004-20231215-en

Max time kernel

147s

Max time network

151s

Command Line

"C:\Users\Admin\AppData\Local\Temp\5fb1da1d27e51c036e788d171e641819.exe"

Signatures

MetaSploit

trojan backdoor metasploit

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-3336304223-2978740688-3645194410-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\5fb1da1d27e51c036e788d171e641819.exe N/A

Executes dropped EXE

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

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\MS DLL IN = "C:\\Windows\\SysWOW64\\msdlli.exe" C:\Windows\SysWOW64\msdlli.exe N/A

Drops file in System32 directory

Description Indicator Process Target
File created C:\Windows\SysWOW64\msdlli.exe C:\Users\Admin\AppData\Local\Temp\5fb1da1d27e51c036e788d171e641819.exe N/A
File opened for modification C:\Windows\SysWOW64\msdlli.exe C:\Users\Admin\AppData\Local\Temp\5fb1da1d27e51c036e788d171e641819.exe N/A
File opened for modification C:\Windows\SysWOW64\msdlli.exe C:\Windows\SysWOW64\msdlli.exe N/A
File created C:\Windows\SysWOW64\svchost.dll C:\Windows\SysWOW64\msdlli.exe N/A
File opened for modification C:\Windows\SysWOW64\svchost.dll C:\Windows\SysWOW64\msdlli.exe N/A

Enumerates physical storage devices

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\5fb1da1d27e51c036e788d171e641819.exe N/A
Token: SeShutdownPrivilege N/A C:\Users\Admin\AppData\Local\Temp\5fb1da1d27e51c036e788d171e641819.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\SysWOW64\msdlli.exe N/A
Token: SeShutdownPrivilege N/A C:\Windows\SysWOW64\msdlli.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\5fb1da1d27e51c036e788d171e641819.exe

"C:\Users\Admin\AppData\Local\Temp\5fb1da1d27e51c036e788d171e641819.exe"

C:\Windows\SysWOW64\msdlli.exe

C:\Windows\SysWOW64\msdlli.exe

C:\Windows\SysWOW64\cmd.exe

"C:\Windows\system32\cmd.exe" /c del "C:\Users\Admin\AppData\Local\Temp\5FB1DA~1.EXE" >> NUL

Network

Country Destination Domain Proto
US 8.8.8.8:53 146.78.124.51.in-addr.arpa udp
US 8.8.8.8:53 194.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 83.177.190.20.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 208.194.73.20.in-addr.arpa udp
US 8.8.8.8:53 n.proxyisp.info udp
US 154.35.64.81:1791 n.proxyisp.info tcp
US 8.8.8.8:53 183.59.114.20.in-addr.arpa udp
US 8.8.8.8:53 206.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 217.135.221.88.in-addr.arpa udp
US 154.35.64.81:1791 n.proxyisp.info tcp
US 154.35.64.81:1791 n.proxyisp.info tcp
US 8.8.8.8:53 209.178.17.96.in-addr.arpa udp
US 154.35.64.81:1791 n.proxyisp.info tcp
US 8.8.8.8:53 21.236.111.52.in-addr.arpa udp
US 8.8.8.8:53 187.178.17.96.in-addr.arpa udp
US 154.35.64.81:1791 n.proxyisp.info tcp
US 154.35.64.81:1791 n.proxyisp.info tcp
US 8.8.8.8:53 105.193.132.51.in-addr.arpa udp

Files

memory/2940-0-0x0000000000400000-0x0000000000422000-memory.dmp

C:\Windows\SysWOW64\msdlli.exe

MD5 69f51b1cbbeeae722b1b602abf871092
SHA1 aa1f31ab17b0c46bb9ad81b526bfa9c45d0cba61
SHA256 03ae7910ce0c02dea3cf3cf5c5885c77d52fc0a87c9bc625cb742fecc787ac6f
SHA512 ac78c7d8e3d481ac791fd59d8d701c527d9adc07e14f03e0dad4d3cb3d9e9bf2a3fcbcce0bf695728a7cc1f229cb1fe9151e6ef174d013b5bc63b8bf7820f3f6

C:\Windows\SysWOW64\msdlli.exe

MD5 5fb1da1d27e51c036e788d171e641819
SHA1 a2250f189da33775857e5c78a88a9f4e2b30f8e0
SHA256 00b99ea9c4a00742c356b29dee039c17891eb9cef040aec7842b7c38899622b6
SHA512 c264528584cf841c2a6088875b34863c5a76b035b6a22ac74fa744141afe22ddadf218ede7f579394a3192113c57a4ca4923df584023c41dbc2193a977bb6845

memory/2940-5-0x0000000000400000-0x0000000000422000-memory.dmp

memory/5056-8-0x0000000000400000-0x0000000000422000-memory.dmp

memory/5056-10-0x0000000000400000-0x0000000000422000-memory.dmp

memory/5056-14-0x0000000000400000-0x0000000000422000-memory.dmp

memory/5056-16-0x0000000000400000-0x0000000000422000-memory.dmp

memory/5056-18-0x0000000000400000-0x0000000000422000-memory.dmp

memory/5056-20-0x0000000000400000-0x0000000000422000-memory.dmp