Malware Analysis Report

2025-01-02 03:09

Sample ID 240818-bkm5kaxcme
Target 4c614a69aebe97562d09c05c5b08db70ba7cba08f6698e5a87fc85407e2fb940.exe
SHA256 4c614a69aebe97562d09c05c5b08db70ba7cba08f6698e5a87fc85407e2fb940
Tags
remcos remotehost discovery execution 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

4c614a69aebe97562d09c05c5b08db70ba7cba08f6698e5a87fc85407e2fb940

Threat Level: Known bad

The file 4c614a69aebe97562d09c05c5b08db70ba7cba08f6698e5a87fc85407e2fb940.exe was found to be: Known bad.

Malicious Activity Summary

remcos remotehost discovery execution rat

Remcos

Command and Scripting Interpreter: PowerShell

Suspicious use of NtSetInformationThreadHideFromDebugger

Suspicious use of SetThreadContext

Suspicious use of NtCreateThreadExHideFromDebugger

Drops file in Windows directory

System Location Discovery: System Language Discovery

Enumerates physical storage devices

Program crash

NSIS installer

Suspicious behavior: MapViewOfSection

Suspicious use of SetWindowsHookEx

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

Suspicious behavior: EnumeratesProcesses

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-08-18 01:12

Signatures

NSIS installer

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-08-18 01:12

Reported

2024-08-18 01:14

Platform

win7-20240729-en

Max time kernel

149s

Max time network

150s

Command Line

"C:\Users\Admin\AppData\Local\Temp\4c614a69aebe97562d09c05c5b08db70ba7cba08f6698e5a87fc85407e2fb940.exe"

Signatures

Remcos

rat remcos

Command and Scripting Interpreter: PowerShell

execution
Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe N/A

Suspicious use of NtCreateThreadExHideFromDebugger

Description Indicator Process Target
N/A N/A C:\Program Files (x86)\windows mail\wab.exe N/A

Suspicious use of NtSetInformationThreadHideFromDebugger

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe N/A
N/A N/A C:\Program Files (x86)\windows mail\wab.exe N/A

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 2756 set thread context of 2648 N/A C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe C:\Program Files (x86)\windows mail\wab.exe

Drops file in Windows directory

Description Indicator Process Target
File opened for modification C:\Windows\albocarbon.ile C:\Users\Admin\AppData\Local\Temp\4c614a69aebe97562d09c05c5b08db70ba7cba08f6698e5a87fc85407e2fb940.exe N/A

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:\Users\Admin\AppData\Local\Temp\4c614a69aebe97562d09c05c5b08db70ba7cba08f6698e5a87fc85407e2fb940.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Program Files (x86)\windows mail\wab.exe N/A

Suspicious behavior: MapViewOfSection

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Program Files (x86)\windows mail\wab.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1900 wrote to memory of 2756 N/A C:\Users\Admin\AppData\Local\Temp\4c614a69aebe97562d09c05c5b08db70ba7cba08f6698e5a87fc85407e2fb940.exe C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
PID 1900 wrote to memory of 2756 N/A C:\Users\Admin\AppData\Local\Temp\4c614a69aebe97562d09c05c5b08db70ba7cba08f6698e5a87fc85407e2fb940.exe C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
PID 1900 wrote to memory of 2756 N/A C:\Users\Admin\AppData\Local\Temp\4c614a69aebe97562d09c05c5b08db70ba7cba08f6698e5a87fc85407e2fb940.exe C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
PID 1900 wrote to memory of 2756 N/A C:\Users\Admin\AppData\Local\Temp\4c614a69aebe97562d09c05c5b08db70ba7cba08f6698e5a87fc85407e2fb940.exe C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
PID 2756 wrote to memory of 2648 N/A C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe C:\Program Files (x86)\windows mail\wab.exe
PID 2756 wrote to memory of 2648 N/A C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe C:\Program Files (x86)\windows mail\wab.exe
PID 2756 wrote to memory of 2648 N/A C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe C:\Program Files (x86)\windows mail\wab.exe
PID 2756 wrote to memory of 2648 N/A C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe C:\Program Files (x86)\windows mail\wab.exe
PID 2756 wrote to memory of 2648 N/A C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe C:\Program Files (x86)\windows mail\wab.exe
PID 2756 wrote to memory of 2648 N/A C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe C:\Program Files (x86)\windows mail\wab.exe

Processes

C:\Users\Admin\AppData\Local\Temp\4c614a69aebe97562d09c05c5b08db70ba7cba08f6698e5a87fc85407e2fb940.exe

"C:\Users\Admin\AppData\Local\Temp\4c614a69aebe97562d09c05c5b08db70ba7cba08f6698e5a87fc85407e2fb940.exe"

C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe

"powershell.exe" -windowstyle hidden "$Afmatningens=Get-Content 'C:\Users\Admin\AppData\Local\Outlaughing235\ephemeric\Antipatheticalness\Anskaffet.Sys';$Unsucculent=$Afmatningens.SubString(619,3);.$Unsucculent($Afmatningens)"

C:\Program Files (x86)\windows mail\wab.exe

"C:\Program Files (x86)\windows mail\wab.exe"

Network

Country Destination Domain Proto
VN 103.67.162.225:80 103.67.162.225 tcp
VN 103.67.162.233:9462 tcp
US 8.8.8.8:53 geoplugin.net udp
NL 178.237.33.50:80 geoplugin.net tcp

Files

memory/2756-7-0x00000000738D1000-0x00000000738D2000-memory.dmp

memory/2756-8-0x00000000738D0000-0x0000000073E7B000-memory.dmp

memory/2756-11-0x00000000738D0000-0x0000000073E7B000-memory.dmp

memory/2756-10-0x00000000738D0000-0x0000000073E7B000-memory.dmp

memory/2756-9-0x00000000738D0000-0x0000000073E7B000-memory.dmp

C:\Users\Admin\AppData\Local\Outlaughing235\ephemeric\Antipatheticalness\Anskaffet.Sys

MD5 d9a344e48210c5d555312be94347270a
SHA1 8e1957cb5f8e181411781bca9fa72f57e8d0d2b1
SHA256 e31954e86c5fadd5da5409be4c6266ac0740652f25073eb29f87d6727d0668b6
SHA512 ed1c9a1ce86f20c3eb860079067a7476b8e543c212b0fccd1e73183b6535dec74f34ece8b0225f10fd2f211af68bac6d7302c3b91e1a88d30285ad202854d853

memory/2756-14-0x00000000738D0000-0x0000000073E7B000-memory.dmp

C:\Users\Admin\AppData\Local\Outlaughing235\ephemeric\Sacrificed.Guf

MD5 e5923d356c8ca6e039eb3c12c3f8ce7a
SHA1 b920b2490fb5bbcefb281df27180eaa4f81825fc
SHA256 a3761e7a154e7defc78d9be7e003d327de84520afe5d8adc90074822ade75b65
SHA512 41af37685e04e272fe7b0b4e0dcb93b0ca6e33f930dc362ba82f93fa428ba0664ce06699c21ccb55a84c5e927d30415fe110cb6f35b1028d46f97d2f7ec95f4f

memory/2756-16-0x00000000738D0000-0x0000000073E7B000-memory.dmp

memory/2756-17-0x0000000006640000-0x000000000B4B5000-memory.dmp

memory/2756-18-0x00000000738D0000-0x0000000073E7B000-memory.dmp

memory/2648-19-0x0000000000B60000-0x0000000001BC2000-memory.dmp

memory/2648-21-0x0000000000B60000-0x0000000001BC2000-memory.dmp

memory/2648-28-0x0000000000B60000-0x0000000001BC2000-memory.dmp

memory/2648-31-0x0000000000B60000-0x0000000001BC2000-memory.dmp

C:\ProgramData\remcos\logs.dat

MD5 129b63696901496a0bc7fad0dbee53cb
SHA1 bd52c91ba23d3e84afe4e04cce263f794456ad0a
SHA256 6200e4314a795069f8ae7b76badc9a8bba6ac4d98632b380c4b5114fd82e564b
SHA512 f7db61f7a1807fcdd84e1e23acd3fb047a5bd5ad9f0d23746aca18b4146b9f3f91e16f7cdbc7caa07f35d45a160fdb1e5607abb6a10ed4cbe10e40c85b47384d

memory/2648-34-0x0000000000B60000-0x0000000001BC2000-memory.dmp

memory/2648-37-0x0000000000B60000-0x0000000001BC2000-memory.dmp

memory/2648-40-0x0000000000B60000-0x0000000001BC2000-memory.dmp

memory/2648-43-0x0000000000B60000-0x0000000001BC2000-memory.dmp

memory/2648-46-0x0000000000B60000-0x0000000001BC2000-memory.dmp

memory/2648-49-0x0000000000B60000-0x0000000001BC2000-memory.dmp

memory/2648-52-0x0000000000B60000-0x0000000001BC2000-memory.dmp

memory/2648-55-0x0000000000B60000-0x0000000001BC2000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-08-18 01:12

Reported

2024-08-18 01:14

Platform

win10v2004-20240802-en

Max time kernel

150s

Max time network

153s

Command Line

"C:\Users\Admin\AppData\Local\Temp\4c614a69aebe97562d09c05c5b08db70ba7cba08f6698e5a87fc85407e2fb940.exe"

Signatures

Command and Scripting Interpreter: PowerShell

execution
Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe N/A

Drops file in Windows directory

Description Indicator Process Target
File opened for modification C:\Windows\albocarbon.ile C:\Users\Admin\AppData\Local\Temp\4c614a69aebe97562d09c05c5b08db70ba7cba08f6698e5a87fc85407e2fb940.exe N/A

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:\Users\Admin\AppData\Local\Temp\4c614a69aebe97562d09c05c5b08db70ba7cba08f6698e5a87fc85407e2fb940.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\4c614a69aebe97562d09c05c5b08db70ba7cba08f6698e5a87fc85407e2fb940.exe

"C:\Users\Admin\AppData\Local\Temp\4c614a69aebe97562d09c05c5b08db70ba7cba08f6698e5a87fc85407e2fb940.exe"

C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe

"powershell.exe" -windowstyle hidden "$Afmatningens=Get-Content 'C:\Users\Admin\AppData\Local\Outlaughing235\ephemeric\Antipatheticalness\Anskaffet.Sys';$Unsucculent=$Afmatningens.SubString(619,3);.$Unsucculent($Afmatningens)"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 2220 -ip 2220

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2220 -s 2644

Network

Country Destination Domain Proto
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 217.106.137.52.in-addr.arpa udp
US 8.8.8.8:53 81.144.22.2.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 8.8.8.8:53 140.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 154.239.44.20.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 237.197.79.204.in-addr.arpa udp
US 8.8.8.8:53 138.201.86.20.in-addr.arpa udp
US 8.8.8.8:53 133.211.185.52.in-addr.arpa udp
US 8.8.8.8:53 183.59.114.20.in-addr.arpa udp
US 8.8.8.8:53 15.164.165.52.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 172.214.232.199.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
US 8.8.8.8:53 10.28.171.150.in-addr.arpa udp
US 8.8.8.8:53 28.73.42.20.in-addr.arpa udp

Files

memory/2220-5-0x0000000073ABE000-0x0000000073ABF000-memory.dmp

memory/2220-6-0x0000000002C30000-0x0000000002C66000-memory.dmp

memory/2220-8-0x0000000005430000-0x0000000005A58000-memory.dmp

memory/2220-7-0x0000000073AB0000-0x0000000074260000-memory.dmp

memory/2220-9-0x0000000073AB0000-0x0000000074260000-memory.dmp

memory/2220-10-0x0000000005A60000-0x0000000005A82000-memory.dmp

memory/2220-11-0x0000000005B00000-0x0000000005B66000-memory.dmp

memory/2220-12-0x0000000005B70000-0x0000000005BD6000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_5dtna2xi.uds.ps1

MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

memory/2220-22-0x0000000005BE0000-0x0000000005F34000-memory.dmp

memory/2220-23-0x0000000006160000-0x000000000617E000-memory.dmp

memory/2220-24-0x0000000006230000-0x000000000627C000-memory.dmp

memory/2220-25-0x00000000073D0000-0x0000000007466000-memory.dmp

memory/2220-26-0x0000000006710000-0x000000000672A000-memory.dmp

memory/2220-27-0x0000000006760000-0x0000000006782000-memory.dmp

memory/2220-28-0x0000000007A20000-0x0000000007FC4000-memory.dmp

C:\Users\Admin\AppData\Local\Outlaughing235\ephemeric\Antipatheticalness\Anskaffet.Sys

MD5 d9a344e48210c5d555312be94347270a
SHA1 8e1957cb5f8e181411781bca9fa72f57e8d0d2b1
SHA256 e31954e86c5fadd5da5409be4c6266ac0740652f25073eb29f87d6727d0668b6
SHA512 ed1c9a1ce86f20c3eb860079067a7476b8e543c212b0fccd1e73183b6535dec74f34ece8b0225f10fd2f211af68bac6d7302c3b91e1a88d30285ad202854d853

memory/2220-30-0x0000000008650000-0x0000000008CCA000-memory.dmp

memory/2220-32-0x0000000073AB0000-0x0000000074260000-memory.dmp