Malware Analysis Report

2024-12-07 22:36

Sample ID 240720-qq9m3szejr
Target ds3rt6lkev.rar
SHA256 7bd61d11236dba87c5cf6b282ad79ff5011d3b6651d752c5ddd3ed339ca4a817
Tags
remcos fudstub rat
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

7bd61d11236dba87c5cf6b282ad79ff5011d3b6651d752c5ddd3ed339ca4a817

Threat Level: Known bad

The file ds3rt6lkev.rar was found to be: Known bad.

Malicious Activity Summary

remcos fudstub rat

Remcos

Suspicious use of SetThreadContext

Enumerates physical storage devices

Suspicious behavior: EnumeratesProcesses

Suspicious behavior: GetForegroundWindowSpam

Suspicious behavior: MapViewOfSection

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-07-20 13:29

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-07-20 13:29

Reported

2024-07-20 13:31

Platform

win7-20240708-en

Max time kernel

150s

Max time network

126s

Command Line

"C:\Users\Admin\AppData\Local\Temp\Setup.exe"

Signatures

Remcos

rat remcos

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 2084 set thread context of 2372 N/A C:\Users\Admin\AppData\Local\Temp\Setup.exe C:\Windows\SysWOW64\cmd.exe

Enumerates physical storage devices

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\Setup.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\Setup.exe N/A
N/A N/A C:\Windows\SysWOW64\cmd.exe N/A
N/A N/A C:\Windows\SysWOW64\cmd.exe N/A

Suspicious behavior: GetForegroundWindowSpam

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

Suspicious behavior: MapViewOfSection

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\Setup.exe N/A
N/A N/A C:\Windows\SysWOW64\cmd.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\Setup.exe

"C:\Users\Admin\AppData\Local\Temp\Setup.exe"

C:\Windows\SysWOW64\cmd.exe

C:\Windows\SysWOW64\cmd.exe

C:\Windows\SysWOW64\explorer.exe

C:\Windows\SysWOW64\explorer.exe

Network

Country Destination Domain Proto
FR 213.5.130.58:443 tcp

Files

memory/2084-0-0x0000000074B50000-0x0000000074CC4000-memory.dmp

memory/2084-1-0x0000000077A50000-0x0000000077BF9000-memory.dmp

memory/2084-12-0x0000000074B62000-0x0000000074B64000-memory.dmp

memory/2084-13-0x0000000074B50000-0x0000000074CC4000-memory.dmp

memory/2084-14-0x0000000074B50000-0x0000000074CC4000-memory.dmp

memory/2084-16-0x0000000000400000-0x000000000064B000-memory.dmp

memory/2084-21-0x0000000057800000-0x0000000057812000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\321341a

MD5 632225a239f36eba237efdcdc11b059d
SHA1 888e8e29f08857f4bdfd1ada4656f32a48d0b000
SHA256 45acb03730eb8ef6ff8cb8ca9e1330f82790f7689cfdecb82ce16be0494e3409
SHA512 f340d689f6bd1e3c6bbdb165c1a6741f5ced0807205610a9c555cf822f87ff8606ec68558d7ebb4bdd5c507d2af5332122995b0f6a7e655f0e4cc6dcbd4c6598

memory/2372-24-0x0000000074B50000-0x0000000074CC4000-memory.dmp

memory/2084-23-0x0000000050310000-0x0000000050349000-memory.dmp

memory/2084-20-0x0000000050120000-0x000000005030D000-memory.dmp

memory/2084-19-0x0000000057000000-0x000000005703F000-memory.dmp

memory/2084-18-0x0000000059800000-0x000000005986E000-memory.dmp

memory/2084-17-0x0000000050000000-0x0000000050116000-memory.dmp

memory/2084-22-0x0000000061E00000-0x0000000061ECA000-memory.dmp

memory/2372-26-0x0000000077A50000-0x0000000077BF9000-memory.dmp

memory/2372-71-0x0000000074B50000-0x0000000074CC4000-memory.dmp

memory/2372-72-0x0000000074B50000-0x0000000074CC4000-memory.dmp

memory/2372-74-0x0000000074B50000-0x0000000074CC4000-memory.dmp

memory/2072-75-0x0000000077A50000-0x0000000077BF9000-memory.dmp

memory/2072-76-0x0000000000400000-0x0000000000483000-memory.dmp

memory/2072-79-0x0000000000400000-0x0000000000483000-memory.dmp

memory/2072-81-0x0000000000400000-0x0000000000483000-memory.dmp

memory/2072-82-0x0000000000400000-0x0000000000483000-memory.dmp

memory/2072-83-0x0000000000400000-0x0000000000483000-memory.dmp

memory/2072-84-0x0000000000400000-0x0000000000483000-memory.dmp

memory/2072-85-0x0000000000400000-0x0000000000483000-memory.dmp

memory/2072-86-0x0000000000400000-0x0000000000483000-memory.dmp

memory/2072-89-0x0000000000400000-0x0000000000483000-memory.dmp

memory/2072-90-0x0000000000400000-0x0000000000483000-memory.dmp

memory/2072-91-0x0000000000400000-0x0000000000483000-memory.dmp

memory/2072-92-0x0000000000400000-0x0000000000483000-memory.dmp

memory/2072-93-0x0000000000400000-0x0000000000483000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-07-20 13:29

Reported

2024-07-20 13:31

Platform

win10v2004-20240709-en

Max time kernel

148s

Max time network

126s

Command Line

"C:\Users\Admin\AppData\Local\Temp\Setup.exe"

Signatures

Remcos

rat remcos

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 3088 set thread context of 3564 N/A C:\Users\Admin\AppData\Local\Temp\Setup.exe C:\Windows\SysWOW64\cmd.exe

Enumerates physical storage devices

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\Setup.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\Setup.exe N/A
N/A N/A C:\Windows\SysWOW64\cmd.exe N/A
N/A N/A C:\Windows\SysWOW64\cmd.exe N/A

Suspicious behavior: MapViewOfSection

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\Setup.exe N/A
N/A N/A C:\Windows\SysWOW64\cmd.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\Setup.exe

"C:\Users\Admin\AppData\Local\Temp\Setup.exe"

C:\Windows\SysWOW64\cmd.exe

C:\Windows\SysWOW64\cmd.exe

C:\Windows\SysWOW64\explorer.exe

C:\Windows\SysWOW64\explorer.exe

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 g.bing.com udp
US 204.79.197.237:443 g.bing.com tcp
US 8.8.8.8:53 81.144.22.2.in-addr.arpa udp
US 8.8.8.8:53 237.197.79.204.in-addr.arpa udp
US 8.8.8.8:53 17.160.190.20.in-addr.arpa udp
US 8.8.8.8:53 26.35.223.20.in-addr.arpa udp
US 8.8.8.8:53 104.219.191.52.in-addr.arpa udp
US 8.8.8.8:53 103.169.127.40.in-addr.arpa udp
US 8.8.8.8:53 171.39.242.20.in-addr.arpa udp
US 8.8.8.8:53 192.142.123.92.in-addr.arpa udp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp
FR 213.5.130.58:443 tcp
US 8.8.8.8:53 58.130.5.213.in-addr.arpa udp
US 8.8.8.8:53 73.144.22.2.in-addr.arpa udp
IE 52.111.236.23:443 tcp
US 8.8.8.8:53 13.227.111.52.in-addr.arpa udp

Files

memory/3088-0-0x0000000074960000-0x0000000074ADB000-memory.dmp

memory/3088-1-0x00007FFAEACF0000-0x00007FFAEAEE5000-memory.dmp

memory/3088-12-0x0000000074972000-0x0000000074974000-memory.dmp

memory/3088-13-0x0000000074960000-0x0000000074ADB000-memory.dmp

memory/3088-14-0x0000000074960000-0x0000000074ADB000-memory.dmp

memory/3088-22-0x0000000050310000-0x0000000050349000-memory.dmp

memory/3564-24-0x0000000074960000-0x0000000074ADB000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\2806a861

MD5 04b2475e0a68bfe9cea081562d58640f
SHA1 b5d6e11b269861b43b8f69e2ffe5930d7d42feb9
SHA256 670650822ddc832c77247f32abe01d99ec6bd36b107cdf66fac0c5bca7c318fe
SHA512 00faecb0a663b251afd14dbfc29279ecbf0f337f7a1faa5a044529a6a42350f928d0894531a604b3b334bca13f715aeb349cd93247025a032106c0f78591e1fc

memory/3088-23-0x0000000061E00000-0x0000000061ECA000-memory.dmp

memory/3088-21-0x0000000050120000-0x000000005030D000-memory.dmp

memory/3088-20-0x0000000057800000-0x0000000057812000-memory.dmp

memory/3088-19-0x0000000057000000-0x000000005703F000-memory.dmp

memory/3088-18-0x0000000050000000-0x0000000050116000-memory.dmp

memory/3088-17-0x0000000059800000-0x000000005986E000-memory.dmp

memory/3088-16-0x0000000000400000-0x000000000064B000-memory.dmp

memory/3564-26-0x00007FFAEACF0000-0x00007FFAEAEE5000-memory.dmp

memory/3564-28-0x0000000074960000-0x0000000074ADB000-memory.dmp

memory/3564-29-0x0000000074960000-0x0000000074ADB000-memory.dmp

memory/3564-31-0x0000000074960000-0x0000000074ADB000-memory.dmp

memory/4276-32-0x00007FFAEACF0000-0x00007FFAEAEE5000-memory.dmp

memory/4276-33-0x0000000000840000-0x00000000008C3000-memory.dmp

memory/4276-36-0x0000000000233000-0x000000000023B000-memory.dmp

memory/4276-37-0x0000000000840000-0x00000000008C3000-memory.dmp

memory/4276-39-0x0000000000840000-0x00000000008C3000-memory.dmp

memory/4276-40-0x0000000000840000-0x00000000008C3000-memory.dmp

memory/4276-41-0x0000000000840000-0x00000000008C3000-memory.dmp

memory/4276-42-0x0000000000840000-0x00000000008C3000-memory.dmp

memory/4276-43-0x0000000000840000-0x00000000008C3000-memory.dmp

memory/4276-44-0x0000000000840000-0x00000000008C3000-memory.dmp

memory/4276-45-0x0000000000840000-0x00000000008C3000-memory.dmp

memory/4276-48-0x0000000000840000-0x00000000008C3000-memory.dmp