Malware Analysis Report

2025-06-16 01:22

Sample ID 240410-rbf8naac27
Target New Purchase Order-030220- SMART SOURCING INC.exe
SHA256 dfde34f40aeed6c22dbc802fe701507eaf6128ef9d530eaa29675cbf7d972cc6
Tags
remcos solomon rat
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

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

dfde34f40aeed6c22dbc802fe701507eaf6128ef9d530eaa29675cbf7d972cc6

Threat Level: Known bad

The file New Purchase Order-030220- SMART SOURCING INC.exe was found to be: Known bad.

Malicious Activity Summary

remcos solomon rat

Remcos

Suspicious use of SetThreadContext

Unsigned PE

Suspicious use of SetWindowsHookEx

Suspicious use of WriteProcessMemory

MITRE ATT&CK

N/A

Analysis: static1

Detonation Overview

Reported

2024-04-10 14:00

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-04-10 14:00

Reported

2024-04-10 14:03

Platform

win10v2004-20240226-en

Max time kernel

150s

Max time network

154s

Command Line

"C:\Users\Admin\AppData\Local\Temp\New Purchase Order-030220- SMART SOURCING INC.exe"

Signatures

Remcos

rat remcos

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 3228 set thread context of 2076 N/A C:\Users\Admin\AppData\Local\Temp\New Purchase Order-030220- SMART SOURCING INC.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\Caspol.exe

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\Caspol.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 3228 wrote to memory of 2076 N/A C:\Users\Admin\AppData\Local\Temp\New Purchase Order-030220- SMART SOURCING INC.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\Caspol.exe
PID 3228 wrote to memory of 2076 N/A C:\Users\Admin\AppData\Local\Temp\New Purchase Order-030220- SMART SOURCING INC.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\Caspol.exe
PID 3228 wrote to memory of 2076 N/A C:\Users\Admin\AppData\Local\Temp\New Purchase Order-030220- SMART SOURCING INC.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\Caspol.exe
PID 3228 wrote to memory of 2076 N/A C:\Users\Admin\AppData\Local\Temp\New Purchase Order-030220- SMART SOURCING INC.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\Caspol.exe
PID 3228 wrote to memory of 2076 N/A C:\Users\Admin\AppData\Local\Temp\New Purchase Order-030220- SMART SOURCING INC.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\Caspol.exe
PID 3228 wrote to memory of 2076 N/A C:\Users\Admin\AppData\Local\Temp\New Purchase Order-030220- SMART SOURCING INC.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\Caspol.exe
PID 3228 wrote to memory of 2076 N/A C:\Users\Admin\AppData\Local\Temp\New Purchase Order-030220- SMART SOURCING INC.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\Caspol.exe
PID 3228 wrote to memory of 2076 N/A C:\Users\Admin\AppData\Local\Temp\New Purchase Order-030220- SMART SOURCING INC.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\Caspol.exe
PID 3228 wrote to memory of 2076 N/A C:\Users\Admin\AppData\Local\Temp\New Purchase Order-030220- SMART SOURCING INC.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\Caspol.exe
PID 3228 wrote to memory of 2076 N/A C:\Users\Admin\AppData\Local\Temp\New Purchase Order-030220- SMART SOURCING INC.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\Caspol.exe
PID 3228 wrote to memory of 2076 N/A C:\Users\Admin\AppData\Local\Temp\New Purchase Order-030220- SMART SOURCING INC.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\Caspol.exe
PID 3228 wrote to memory of 2076 N/A C:\Users\Admin\AppData\Local\Temp\New Purchase Order-030220- SMART SOURCING INC.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\Caspol.exe

Processes

C:\Users\Admin\AppData\Local\Temp\New Purchase Order-030220- SMART SOURCING INC.exe

"C:\Users\Admin\AppData\Local\Temp\New Purchase Order-030220- SMART SOURCING INC.exe"

C:\Windows\Microsoft.NET\Framework\v4.0.30319\Caspol.exe

"C:\Windows\Microsoft.NET\Framework\v4.0.30319\Caspol.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 58.55.71.13.in-addr.arpa udp
US 8.8.8.8:53 grantadistciaret.com udp
DE 85.195.105.109:3212 grantadistciaret.com tcp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 64.159.190.20.in-addr.arpa udp
DE 85.195.105.109:3223 grantadistciaret.com tcp
US 8.8.8.8:53 103.169.127.40.in-addr.arpa udp
US 8.8.8.8:53 56.126.166.20.in-addr.arpa udp
US 8.8.8.8:53 240.221.184.93.in-addr.arpa udp
DE 85.195.105.109:3212 grantadistciaret.com tcp
DE 85.195.105.109:3223 grantadistciaret.com tcp
DE 85.195.105.109:3212 grantadistciaret.com tcp
US 8.8.8.8:53 29.243.111.52.in-addr.arpa udp
US 8.8.8.8:53 249.197.17.2.in-addr.arpa udp
DE 85.195.105.109:3223 grantadistciaret.com tcp
DE 85.195.105.109:3212 grantadistciaret.com tcp
US 8.8.8.8:53 88.16.208.104.in-addr.arpa udp

Files

memory/3228-0-0x000001CC0AA00000-0x000001CC0AAAE000-memory.dmp

memory/3228-1-0x00007FF8298B0000-0x00007FF82A371000-memory.dmp

memory/3228-2-0x000001CC24F20000-0x000001CC24FA6000-memory.dmp

memory/3228-3-0x000001CC0AE50000-0x000001CC0AE56000-memory.dmp

memory/3228-4-0x000001CC25110000-0x000001CC25120000-memory.dmp

memory/3228-5-0x000001CC0AE60000-0x000001CC0AE6A000-memory.dmp

memory/2076-6-0x0000000000400000-0x0000000000482000-memory.dmp

memory/3228-9-0x00007FF8298B0000-0x00007FF82A371000-memory.dmp

memory/2076-8-0x0000000000400000-0x0000000000482000-memory.dmp

memory/2076-10-0x0000000000400000-0x0000000000482000-memory.dmp

memory/2076-12-0x0000000000400000-0x0000000000482000-memory.dmp

memory/2076-11-0x0000000000400000-0x0000000000482000-memory.dmp

memory/2076-14-0x0000000000400000-0x0000000000482000-memory.dmp

memory/2076-15-0x0000000000400000-0x0000000000482000-memory.dmp

memory/2076-16-0x0000000000400000-0x0000000000482000-memory.dmp

memory/2076-21-0x0000000000400000-0x0000000000482000-memory.dmp

memory/2076-22-0x0000000000400000-0x0000000000482000-memory.dmp

memory/2076-23-0x0000000000400000-0x0000000000482000-memory.dmp

C:\ProgramData\remcos\logs.dat

MD5 e18d26d4f16f3cd78a7eb442a5e18d08
SHA1 dbaa82727faed64a5316bcad89c60d63ef8cf20d
SHA256 1e9fec3aa07267f67eb8a4f7dc54bd35d6f5180c1afc9b0fd4a00a6f121b5b6c
SHA512 2707b40ead9a013b91e5657f9849af24ae62693ed55392a25149fcf10e6d297a4cb02d085721f09b5ce5d130b4def2dbc93a523a76e27d017d8a64d1b875cc75

memory/2076-28-0x0000000000400000-0x0000000000482000-memory.dmp

memory/2076-29-0x0000000000400000-0x0000000000482000-memory.dmp

memory/2076-34-0x0000000000400000-0x0000000000482000-memory.dmp

memory/2076-41-0x0000000000400000-0x0000000000482000-memory.dmp

memory/2076-42-0x0000000000400000-0x0000000000482000-memory.dmp

memory/2076-47-0x0000000000400000-0x0000000000482000-memory.dmp

memory/2076-53-0x0000000000400000-0x0000000000482000-memory.dmp

memory/2076-54-0x0000000000400000-0x0000000000482000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-04-10 14:00

Reported

2024-04-10 14:03

Platform

win11-20240221-en

Max time kernel

153s

Max time network

163s

Command Line

"C:\Users\Admin\AppData\Local\Temp\New Purchase Order-030220- SMART SOURCING INC.exe"

Signatures

Remcos

rat remcos

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 3036 set thread context of 1992 N/A C:\Users\Admin\AppData\Local\Temp\New Purchase Order-030220- SMART SOURCING INC.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\Caspol.exe

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\Caspol.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 3036 wrote to memory of 1992 N/A C:\Users\Admin\AppData\Local\Temp\New Purchase Order-030220- SMART SOURCING INC.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\Caspol.exe
PID 3036 wrote to memory of 1992 N/A C:\Users\Admin\AppData\Local\Temp\New Purchase Order-030220- SMART SOURCING INC.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\Caspol.exe
PID 3036 wrote to memory of 1992 N/A C:\Users\Admin\AppData\Local\Temp\New Purchase Order-030220- SMART SOURCING INC.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\Caspol.exe
PID 3036 wrote to memory of 1992 N/A C:\Users\Admin\AppData\Local\Temp\New Purchase Order-030220- SMART SOURCING INC.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\Caspol.exe
PID 3036 wrote to memory of 1992 N/A C:\Users\Admin\AppData\Local\Temp\New Purchase Order-030220- SMART SOURCING INC.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\Caspol.exe
PID 3036 wrote to memory of 1992 N/A C:\Users\Admin\AppData\Local\Temp\New Purchase Order-030220- SMART SOURCING INC.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\Caspol.exe
PID 3036 wrote to memory of 1992 N/A C:\Users\Admin\AppData\Local\Temp\New Purchase Order-030220- SMART SOURCING INC.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\Caspol.exe
PID 3036 wrote to memory of 1992 N/A C:\Users\Admin\AppData\Local\Temp\New Purchase Order-030220- SMART SOURCING INC.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\Caspol.exe
PID 3036 wrote to memory of 1992 N/A C:\Users\Admin\AppData\Local\Temp\New Purchase Order-030220- SMART SOURCING INC.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\Caspol.exe
PID 3036 wrote to memory of 1992 N/A C:\Users\Admin\AppData\Local\Temp\New Purchase Order-030220- SMART SOURCING INC.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\Caspol.exe
PID 3036 wrote to memory of 1992 N/A C:\Users\Admin\AppData\Local\Temp\New Purchase Order-030220- SMART SOURCING INC.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\Caspol.exe
PID 3036 wrote to memory of 1992 N/A C:\Users\Admin\AppData\Local\Temp\New Purchase Order-030220- SMART SOURCING INC.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\Caspol.exe

Processes

C:\Users\Admin\AppData\Local\Temp\New Purchase Order-030220- SMART SOURCING INC.exe

"C:\Users\Admin\AppData\Local\Temp\New Purchase Order-030220- SMART SOURCING INC.exe"

C:\Windows\Microsoft.NET\Framework\v4.0.30319\Caspol.exe

"C:\Windows\Microsoft.NET\Framework\v4.0.30319\Caspol.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 grantadistciaret.com udp
DE 85.195.105.109:3212 grantadistciaret.com tcp
DE 85.195.105.109:3223 grantadistciaret.com tcp
DE 85.195.105.109:3212 grantadistciaret.com tcp
DE 85.195.105.109:3223 grantadistciaret.com tcp
DE 85.195.105.109:3212 grantadistciaret.com tcp
DE 85.195.105.109:3223 grantadistciaret.com tcp
DE 85.195.105.109:3212 grantadistciaret.com tcp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp

Files

memory/3036-0-0x00007FFF3CAA0000-0x00007FFF3D562000-memory.dmp

memory/3036-1-0x000002D58DD20000-0x000002D58DDCE000-memory.dmp

memory/3036-2-0x000002D58FB00000-0x000002D58FB86000-memory.dmp

memory/3036-3-0x000002D58E1C0000-0x000002D58E1C6000-memory.dmp

memory/3036-4-0x000002D58FC20000-0x000002D58FC30000-memory.dmp

memory/3036-5-0x000002D58E1D0000-0x000002D58E1DA000-memory.dmp

memory/1992-6-0x0000000000400000-0x0000000000482000-memory.dmp

memory/1992-8-0x0000000000400000-0x0000000000482000-memory.dmp

memory/3036-10-0x00007FFF3CAA0000-0x00007FFF3D562000-memory.dmp

memory/1992-9-0x0000000000400000-0x0000000000482000-memory.dmp

memory/1992-11-0x0000000000400000-0x0000000000482000-memory.dmp

memory/1992-14-0x0000000000400000-0x0000000000482000-memory.dmp

memory/1992-12-0x0000000000400000-0x0000000000482000-memory.dmp

memory/1992-15-0x0000000000400000-0x0000000000482000-memory.dmp

memory/1992-16-0x0000000000400000-0x0000000000482000-memory.dmp

memory/1992-21-0x0000000000400000-0x0000000000482000-memory.dmp

memory/1992-22-0x0000000000400000-0x0000000000482000-memory.dmp

memory/1992-23-0x0000000000400000-0x0000000000482000-memory.dmp

C:\ProgramData\remcos\logs.dat

MD5 7cf429de08790c614edf97c1c11203cc
SHA1 19fc2827f2c2761344dfb8662d493c4bd5a86db9
SHA256 0cae841406e830da892d4da54705129c360f8a219172ec5b9103429e326cbbe5
SHA512 dc33aeb7da1740361a456a4089a71a978ad37d7ea0296fd8dd37a1cc8b60397c57c99fbc4caa2d03b7700114fbb0fedecc98cb4141a7da7d5d2295f500f4526b

memory/1992-28-0x0000000000400000-0x0000000000482000-memory.dmp

memory/1992-29-0x0000000000400000-0x0000000000482000-memory.dmp

memory/1992-34-0x0000000000400000-0x0000000000482000-memory.dmp

memory/1992-41-0x0000000000400000-0x0000000000482000-memory.dmp

memory/1992-42-0x0000000000400000-0x0000000000482000-memory.dmp

memory/1992-47-0x0000000000400000-0x0000000000482000-memory.dmp

memory/1992-53-0x0000000000400000-0x0000000000482000-memory.dmp

memory/1992-54-0x0000000000400000-0x0000000000482000-memory.dmp