Malware Analysis Report

2025-01-02 03:23

Sample ID 240723-vgczzasglh
Target fiscalia.exe
SHA256 d3ae0198e42c1f207bd4ba866ad9f634cddb1b3f15757db7b417a74bfc20116e
Tags
remcos kilos discovery persistence 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

d3ae0198e42c1f207bd4ba866ad9f634cddb1b3f15757db7b417a74bfc20116e

Threat Level: Known bad

The file fiscalia.exe was found to be: Known bad.

Malicious Activity Summary

remcos kilos discovery persistence rat

Remcos

Adds Run key to start application

Unsigned PE

System Location Discovery: System Language Discovery

Suspicious use of SetWindowsHookEx

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-07-23 16:57

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-07-23 16:57

Reported

2024-07-23 17:01

Platform

win7-20240704-es

Max time kernel

150s

Max time network

129s

Command Line

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

Signatures

Remcos

rat remcos

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-2212144002-1172735686-1556890956-1000\Software\Microsoft\Windows\CurrentVersion\Run\Niiiiuttu = "C:\\Users\\Admin\\Documents\\Ounsa\\CoxcoxUpdater.exe" C:\Users\Admin\AppData\Local\Temp\fiscalia.exe N/A

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\fiscalia.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\fiscalia.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\fiscalia.exe N/A

Processes

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

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

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

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

Network

Country Destination Domain Proto
US 8.8.8.8:53 card25.con-ip.com udp
CO 179.15.133.126:1664 card25.con-ip.com tcp
US 8.8.8.8:53 geoplugin.net udp
NL 178.237.33.50:80 geoplugin.net tcp

Files

memory/956-1-0x0000000000407000-0x0000000000421000-memory.dmp

memory/956-0-0x0000000000400000-0x0000000000657000-memory.dmp

memory/956-2-0x0000000000400000-0x0000000000657000-memory.dmp

memory/956-3-0x0000000000400000-0x0000000000657000-memory.dmp

memory/2780-4-0x00000000000C0000-0x0000000000142000-memory.dmp

memory/2780-8-0x00000000000C0000-0x0000000000142000-memory.dmp

memory/2780-6-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

memory/956-9-0x0000000000400000-0x0000000000657000-memory.dmp

memory/2780-11-0x00000000000C0000-0x0000000000142000-memory.dmp

memory/2780-12-0x0000000000400000-0x0000000000657000-memory.dmp

memory/2780-13-0x00000000000C0000-0x0000000000142000-memory.dmp

memory/2780-16-0x00000000000C0000-0x0000000000142000-memory.dmp

memory/2780-17-0x00000000000C0000-0x0000000000142000-memory.dmp

memory/2780-18-0x00000000000C0000-0x0000000000142000-memory.dmp

memory/2780-19-0x00000000000C0000-0x0000000000142000-memory.dmp

memory/2780-20-0x00000000000C0000-0x0000000000142000-memory.dmp

memory/2780-22-0x00000000000C0000-0x0000000000142000-memory.dmp

C:\ProgramData\remcos\logs.dat

MD5 3855633cb9bca4a2962fa7eb64151b05
SHA1 6996d91e4c4c7f5279d2bc704f9a51887001f0fc
SHA256 e178d9b32a598f0ac4b50569fc2331d80d1d799ba8deb1e6064531f67a18179e
SHA512 99150c0cad02e9371d2662bf4d72a43aae5c1bcf075f17aaeaa4e40cc43a3350918e45031c7579b8a855344bba044873731172b90855d4fd16f6c78a02d41ecf

memory/2780-29-0x00000000000C0000-0x0000000000142000-memory.dmp

memory/2780-30-0x00000000000C0000-0x0000000000142000-memory.dmp

memory/2780-37-0x00000000000C0000-0x0000000000142000-memory.dmp

memory/2780-38-0x00000000000C0000-0x0000000000142000-memory.dmp

memory/2780-45-0x00000000000C0000-0x0000000000142000-memory.dmp

memory/2780-46-0x00000000000C0000-0x0000000000142000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-07-23 16:57

Reported

2024-07-23 17:00

Platform

win10v2004-20240709-es

Max time kernel

149s

Max time network

146s

Command Line

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

Signatures

Remcos

rat remcos

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-1705699165-553239100-4129523827-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Niiiiuttu = "C:\\Users\\Admin\\Documents\\Ounsa\\CoxcoxUpdater.exe" C:\Users\Admin\AppData\Local\Temp\fiscalia.exe N/A

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\fiscalia.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\fiscalia.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\fiscalia.exe N/A

Processes

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

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

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

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

Network

Country Destination Domain Proto
US 8.8.8.8:53 104.219.191.52.in-addr.arpa udp
US 8.8.8.8:53 73.144.22.2.in-addr.arpa udp
US 8.8.8.8:53 68.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 88.156.103.20.in-addr.arpa udp
US 8.8.8.8:53 card25.con-ip.com udp
CO 179.15.133.126:1664 card25.con-ip.com tcp
US 8.8.8.8:53 126.133.15.179.in-addr.arpa udp
US 8.8.8.8:53 geoplugin.net udp
NL 178.237.33.50:80 geoplugin.net tcp
US 8.8.8.8:53 50.33.237.178.in-addr.arpa udp
US 8.8.8.8:53 50.23.12.20.in-addr.arpa udp
US 8.8.8.8:53 18.31.95.13.in-addr.arpa udp
US 8.8.8.8:53 59.170.16.2.in-addr.arpa udp
CO 179.15.133.126:1664 card25.con-ip.com tcp
CO 179.15.133.126:1664 card25.con-ip.com tcp
US 8.8.8.8:53 172.214.232.199.in-addr.arpa udp
US 8.8.8.8:53 14.227.111.52.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

Files

memory/1936-0-0x0000000000400000-0x0000000000657000-memory.dmp

memory/1936-1-0x0000000000407000-0x0000000000421000-memory.dmp

memory/1936-2-0x0000000000400000-0x0000000000657000-memory.dmp

memory/2224-3-0x00000000000D0000-0x0000000000152000-memory.dmp

memory/1936-4-0x0000000000400000-0x0000000000657000-memory.dmp

memory/2224-5-0x00000000000D0000-0x0000000000152000-memory.dmp

memory/2224-6-0x00000000000D0000-0x0000000000152000-memory.dmp

memory/2224-10-0x00000000000D0000-0x0000000000152000-memory.dmp

memory/2224-11-0x0000000000400000-0x0000000000657000-memory.dmp

memory/2224-7-0x00000000000D0000-0x0000000000152000-memory.dmp

memory/2224-12-0x00000000000D0000-0x0000000000152000-memory.dmp

memory/2224-13-0x00000000000D0000-0x0000000000152000-memory.dmp

memory/2224-14-0x00000000000D0000-0x0000000000152000-memory.dmp

memory/2224-15-0x00000000000D0000-0x0000000000152000-memory.dmp

memory/2224-23-0x00000000000D0000-0x0000000000152000-memory.dmp

memory/2224-22-0x00000000000D0000-0x0000000000152000-memory.dmp

C:\ProgramData\remcos\logs.dat

MD5 e93528b497846f8b8efbabd3928e8cf0
SHA1 37e66d4754c3948a758a2b48cdaebf8376e33557
SHA256 34d00b9467fe12f0978e748043e79caedd350193df1f33df49a0a1b13234f5a2
SHA512 18747b5a1be60e5b4b0c1517d74b7e7d45819156c5fd003c44022bfdbb48ba6ed47be8ab2c4b469bf107ac27db3da65ee5bba0db67e66ec888942a8b8de4a47f

memory/2224-29-0x00000000000D0000-0x0000000000152000-memory.dmp

memory/2224-30-0x00000000000D0000-0x0000000000152000-memory.dmp

memory/2224-31-0x00000000000D0000-0x0000000000152000-memory.dmp

memory/2224-32-0x00000000000D0000-0x0000000000152000-memory.dmp

memory/2224-33-0x00000000000D0000-0x0000000000152000-memory.dmp

memory/2224-34-0x00000000000D0000-0x0000000000152000-memory.dmp

memory/2224-36-0x00000000000D0000-0x0000000000152000-memory.dmp

memory/2224-37-0x00000000000D0000-0x0000000000152000-memory.dmp

memory/2224-44-0x00000000000D0000-0x0000000000152000-memory.dmp

memory/2224-45-0x00000000000D0000-0x0000000000152000-memory.dmp

C:\ProgramData\remcos\logs.dat

MD5 cf4e2f3e930efe1eaf9bca55284606de
SHA1 1c54f1aeab7373198dfb52255defdf9a0b7ef174
SHA256 17884ea5dbdb32579570fa3ee47cb2047cbd3ceedf1600963cbaf352181ecad9
SHA512 8036ff3582ddc6146c559a05cb95c299f4ceb10b9ab7a2917ead22431eea56b97b94327c5ad12073e188803a8fc18e8e7daf3ddd05e787a2d7492cbb46e35d6d