Malware Analysis Report

2025-01-02 03:19

Sample ID 240327-cmzf2sdb91
Target 373859f19da9662cebadea97fe4acf12e811b72acb5490d80c7f0d8ff45353a3.exe
SHA256 373859f19da9662cebadea97fe4acf12e811b72acb5490d80c7f0d8ff45353a3
Tags
modiloader trojan remcos remotehost 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

373859f19da9662cebadea97fe4acf12e811b72acb5490d80c7f0d8ff45353a3

Threat Level: Known bad

The file 373859f19da9662cebadea97fe4acf12e811b72acb5490d80c7f0d8ff45353a3.exe was found to be: Known bad.

Malicious Activity Summary

modiloader trojan remcos remotehost persistence rat

Remcos

ModiLoader, DBatLoader

Detects Windows exceutables bypassing UAC using CMSTP COM interfaces. MITRE (T1218.003)

ModiLoader Second Stage

Executes dropped EXE

Loads dropped DLL

Adds Run key to start application

Program crash

Unsigned PE

Script User-Agent

Suspicious use of SetWindowsHookEx

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

Suspicious behavior: EnumeratesProcesses

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-03-27 02:12

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-03-27 02:12

Reported

2024-03-27 02:15

Platform

win7-20240221-en

Max time kernel

131s

Max time network

140s

Command Line

"C:\Users\Admin\AppData\Local\Temp\373859f19da9662cebadea97fe4acf12e811b72acb5490d80c7f0d8ff45353a3.exe"

Signatures

Processes

C:\Users\Admin\AppData\Local\Temp\373859f19da9662cebadea97fe4acf12e811b72acb5490d80c7f0d8ff45353a3.exe

"C:\Users\Admin\AppData\Local\Temp\373859f19da9662cebadea97fe4acf12e811b72acb5490d80c7f0d8ff45353a3.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 1740 -s 724

Network

Country Destination Domain Proto
US 8.8.8.8:53 1021.filemail.com udp
US 23.237.82.74:443 1021.filemail.com tcp
US 23.237.82.74:443 1021.filemail.com tcp

Files

memory/1740-0-0x00000000001C0000-0x00000000001C1000-memory.dmp

memory/1740-1-0x0000000002D10000-0x0000000003D10000-memory.dmp

memory/1740-2-0x0000000002D10000-0x0000000003D10000-memory.dmp

memory/1740-4-0x00000000001C0000-0x00000000001C1000-memory.dmp

memory/1740-5-0x0000000000400000-0x0000000000527000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-03-27 02:12

Reported

2024-03-27 02:14

Platform

win10v2004-20240226-en

Max time kernel

149s

Max time network

155s

Command Line

"C:\Users\Admin\AppData\Local\Temp\373859f19da9662cebadea97fe4acf12e811b72acb5490d80c7f0d8ff45353a3.exe"

Signatures

ModiLoader, DBatLoader

trojan modiloader

Remcos

rat remcos

Detects Windows exceutables bypassing UAC using CMSTP COM interfaces. MITRE (T1218.003)

Description Indicator Process Target
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ModiLoader Second Stage

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

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Windows \System32\2226800.exe N/A

Loads dropped DLL

Description Indicator Process Target
N/A N/A C:\Windows \System32\2226800.exe N/A

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-513485977-2495024337-1260977654-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Qbijgrcm = "C:\\Users\\Public\\Qbijgrcm.url" C:\Users\Admin\AppData\Local\Temp\373859f19da9662cebadea97fe4acf12e811b72acb5490d80c7f0d8ff45353a3.exe N/A

Script User-Agent

Description Indicator Process Target
HTTP User-Agent header Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5) N/A N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A

Suspicious use of SetWindowsHookEx

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

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1380 wrote to memory of 1708 N/A C:\Users\Admin\AppData\Local\Temp\373859f19da9662cebadea97fe4acf12e811b72acb5490d80c7f0d8ff45353a3.exe C:\Windows\SysWOW64\cmd.exe
PID 1380 wrote to memory of 1708 N/A C:\Users\Admin\AppData\Local\Temp\373859f19da9662cebadea97fe4acf12e811b72acb5490d80c7f0d8ff45353a3.exe C:\Windows\SysWOW64\cmd.exe
PID 1380 wrote to memory of 1708 N/A C:\Users\Admin\AppData\Local\Temp\373859f19da9662cebadea97fe4acf12e811b72acb5490d80c7f0d8ff45353a3.exe C:\Windows\SysWOW64\cmd.exe
PID 1380 wrote to memory of 4624 N/A C:\Users\Admin\AppData\Local\Temp\373859f19da9662cebadea97fe4acf12e811b72acb5490d80c7f0d8ff45353a3.exe C:\Windows\SysWOW64\cmd.exe
PID 1380 wrote to memory of 4624 N/A C:\Users\Admin\AppData\Local\Temp\373859f19da9662cebadea97fe4acf12e811b72acb5490d80c7f0d8ff45353a3.exe C:\Windows\SysWOW64\cmd.exe
PID 1380 wrote to memory of 4624 N/A C:\Users\Admin\AppData\Local\Temp\373859f19da9662cebadea97fe4acf12e811b72acb5490d80c7f0d8ff45353a3.exe C:\Windows\SysWOW64\cmd.exe
PID 1380 wrote to memory of 4832 N/A C:\Users\Admin\AppData\Local\Temp\373859f19da9662cebadea97fe4acf12e811b72acb5490d80c7f0d8ff45353a3.exe C:\Windows\SysWOW64\cmd.exe
PID 1380 wrote to memory of 4832 N/A C:\Users\Admin\AppData\Local\Temp\373859f19da9662cebadea97fe4acf12e811b72acb5490d80c7f0d8ff45353a3.exe C:\Windows\SysWOW64\cmd.exe
PID 1380 wrote to memory of 4832 N/A C:\Users\Admin\AppData\Local\Temp\373859f19da9662cebadea97fe4acf12e811b72acb5490d80c7f0d8ff45353a3.exe C:\Windows\SysWOW64\cmd.exe
PID 4832 wrote to memory of 740 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows \System32\2226800.exe
PID 4832 wrote to memory of 740 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows \System32\2226800.exe
PID 740 wrote to memory of 2256 N/A C:\Windows \System32\2226800.exe C:\Windows\system32\cmd.exe
PID 740 wrote to memory of 2256 N/A C:\Windows \System32\2226800.exe C:\Windows\system32\cmd.exe
PID 2256 wrote to memory of 4388 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\cmd.exe
PID 2256 wrote to memory of 4388 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\cmd.exe
PID 4388 wrote to memory of 2036 N/A C:\Windows\system32\cmd.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 4388 wrote to memory of 2036 N/A C:\Windows\system32\cmd.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 1380 wrote to memory of 3936 N/A C:\Users\Admin\AppData\Local\Temp\373859f19da9662cebadea97fe4acf12e811b72acb5490d80c7f0d8ff45353a3.exe C:\Windows\SysWOW64\extrac32.exe
PID 1380 wrote to memory of 3936 N/A C:\Users\Admin\AppData\Local\Temp\373859f19da9662cebadea97fe4acf12e811b72acb5490d80c7f0d8ff45353a3.exe C:\Windows\SysWOW64\extrac32.exe
PID 1380 wrote to memory of 3936 N/A C:\Users\Admin\AppData\Local\Temp\373859f19da9662cebadea97fe4acf12e811b72acb5490d80c7f0d8ff45353a3.exe C:\Windows\SysWOW64\extrac32.exe
PID 1380 wrote to memory of 2040 N/A C:\Users\Admin\AppData\Local\Temp\373859f19da9662cebadea97fe4acf12e811b72acb5490d80c7f0d8ff45353a3.exe C:\Windows\SysWOW64\colorcpl.exe
PID 1380 wrote to memory of 2040 N/A C:\Users\Admin\AppData\Local\Temp\373859f19da9662cebadea97fe4acf12e811b72acb5490d80c7f0d8ff45353a3.exe C:\Windows\SysWOW64\colorcpl.exe
PID 1380 wrote to memory of 2040 N/A C:\Users\Admin\AppData\Local\Temp\373859f19da9662cebadea97fe4acf12e811b72acb5490d80c7f0d8ff45353a3.exe C:\Windows\SysWOW64\colorcpl.exe
PID 1380 wrote to memory of 2040 N/A C:\Users\Admin\AppData\Local\Temp\373859f19da9662cebadea97fe4acf12e811b72acb5490d80c7f0d8ff45353a3.exe C:\Windows\SysWOW64\colorcpl.exe

Processes

C:\Users\Admin\AppData\Local\Temp\373859f19da9662cebadea97fe4acf12e811b72acb5490d80c7f0d8ff45353a3.exe

"C:\Users\Admin\AppData\Local\Temp\373859f19da9662cebadea97fe4acf12e811b72acb5490d80c7f0d8ff45353a3.exe"

C:\Windows\SysWOW64\cmd.exe

cmd /c mkdir "\\?\C:\Windows "

C:\Windows\SysWOW64\cmd.exe

cmd /c mkdir "\\?\C:\Windows \System32"

C:\Windows\SysWOW64\cmd.exe

cmd /c "C:\Windows \System32\2226800.exe"

C:\Windows \System32\2226800.exe

"C:\Windows \System32\2226800.exe"

C:\Windows\system32\cmd.exe

C:\Windows\system32\cmd.exe /c ""C:\windows \system32\KDECO.bat""

C:\Windows\system32\cmd.exe

cmd /c powershell.exe -inputformat none -outputformat none -NonInteractive -Command "Add-MpPreference -ExclusionPath 'C:\Users'"

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe

powershell.exe -inputformat none -outputformat none -NonInteractive -Command "Add-MpPreference -ExclusionPath 'C:\Users'"

C:\Windows\SysWOW64\extrac32.exe

C:\\Windows\\System32\\extrac32.exe /C /Y C:\Users\Admin\AppData\Local\Temp\373859f19da9662cebadea97fe4acf12e811b72acb5490d80c7f0d8ff45353a3.exe C:\\Users\\Public\\Libraries\\Qbijgrcm.PIF

C:\Windows\SysWOW64\colorcpl.exe

C:\Windows\System32\colorcpl.exe

Network

Country Destination Domain Proto
US 8.8.8.8:53 76.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 43.58.199.20.in-addr.arpa udp
US 8.8.8.8:53 180.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 58.55.71.13.in-addr.arpa udp
US 8.8.8.8:53 9.228.82.20.in-addr.arpa udp
US 8.8.8.8:53 1021.filemail.com udp
US 23.237.82.74:443 1021.filemail.com tcp
US 23.237.82.74:443 1021.filemail.com tcp
US 8.8.8.8:53 41.110.16.96.in-addr.arpa udp
US 8.8.8.8:53 74.82.237.23.in-addr.arpa udp
N/A 127.0.0.1:47212 tcp
US 8.8.8.8:53 228.249.119.40.in-addr.arpa udp
US 20.231.121.79:80 tcp
US 8.8.8.8:53 officerem.duckdns.org udp
US 23.95.235.29:47212 officerem.duckdns.org tcp
US 8.8.8.8:53 29.235.95.23.in-addr.arpa udp
US 8.8.8.8:53 103.169.127.40.in-addr.arpa udp
US 8.8.8.8:53 198.187.3.20.in-addr.arpa udp
US 8.8.8.8:53 104.219.191.52.in-addr.arpa udp
US 8.8.8.8:53 86.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 55.36.223.20.in-addr.arpa udp
US 8.8.8.8:53 geoplugin.net udp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
NL 178.237.33.50:80 geoplugin.net tcp
US 8.8.8.8:53 200.197.79.204.in-addr.arpa udp
US 8.8.8.8:53 50.33.237.178.in-addr.arpa udp
US 8.8.8.8:53 18.134.221.88.in-addr.arpa udp
US 8.8.8.8:53 194.178.17.96.in-addr.arpa udp
N/A 127.0.0.1:47212 tcp
US 23.95.235.29:47212 officerem.duckdns.org tcp
NL 178.237.33.50:80 geoplugin.net tcp
US 8.8.8.8:53 23.236.111.52.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 208.143.182.52.in-addr.arpa udp

Files

memory/1380-0-0x0000000000740000-0x0000000000741000-memory.dmp

memory/1380-1-0x0000000004070000-0x0000000005070000-memory.dmp

memory/1380-2-0x0000000004070000-0x0000000005070000-memory.dmp

memory/1380-4-0x0000000000400000-0x0000000000527000-memory.dmp

C:\Windows \System32\2226800.exe

MD5 231ce1e1d7d98b44371ffff407d68b59
SHA1 25510d0f6353dbf0c9f72fc880de7585e34b28ff
SHA256 30951db8bfc21640645aa9144cfeaa294bb7c6980ef236d28552b6f4f3f92a96
SHA512 520887b01bda96b7c4f91b9330a5c03a12f7c7f266d4359432e7bacc76b0eef377c05a4361f8fa80ad0b94b5865699d747a5d94a2d3dcdb85dabf5887bb6c612

C:\Windows \System32\netutils.dll

MD5 fa7aa88417d0c48807144a1a48fe3fbc
SHA1 6f5ec990b12d4a6075050a94e0d68d03781fa46d
SHA256 2019dcd18ba7d5554a4a9da882740aa883941670af3de9396960081a0f8aa098
SHA512 99b2eb6f8e7d00a3803cba229149e5e0cb67a3deb607782c55fbacd25d9c074cce83759de15490eff939d5ad98f26cdbd44395cc79ffe22753e16c3d9e3b5fff

memory/740-15-0x00000000613C0000-0x00000000613E3000-memory.dmp

C:\windows \system32\KDECO.bat

MD5 c545650595b479c81ad6b9d8882aae39
SHA1 7a98aa2e6eee23b3c1bba876955d525bc618b3f0
SHA256 a3a80983cb33159f0455fa0135789402558baa1460db94d0071318512b8cb5f9
SHA512 85ac596a7da9072a28c4178e4fdedc98f1b49c8e3fe5612cfe464833297b13f65d2dc59b52d7fc9970cff8f98d954111229aec0ed9dded454e03b0cf4ebb6ff3

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_2vyp501p.elz.ps1

MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

memory/2036-17-0x000001B2B5A50000-0x000001B2B5A72000-memory.dmp

memory/2036-27-0x00007FFD3DA90000-0x00007FFD3E551000-memory.dmp

memory/2036-29-0x000001B2B5AB0000-0x000001B2B5AC0000-memory.dmp

memory/2036-30-0x000001B2B5AB0000-0x000001B2B5AC0000-memory.dmp

memory/2036-31-0x000001B2B5AB0000-0x000001B2B5AC0000-memory.dmp

memory/2036-34-0x00007FFD3DA90000-0x00007FFD3E551000-memory.dmp

memory/1380-35-0x0000000000740000-0x0000000000741000-memory.dmp

memory/2040-42-0x00000000006E0000-0x00000000016E0000-memory.dmp

memory/2040-44-0x00000000006E0000-0x00000000016E0000-memory.dmp

memory/2040-45-0x00000000006E0000-0x00000000016E0000-memory.dmp

memory/2040-46-0x00000000006E0000-0x00000000016E0000-memory.dmp

memory/2040-47-0x00000000006E0000-0x00000000016E0000-memory.dmp

memory/2040-48-0x00000000006E0000-0x00000000016E0000-memory.dmp

memory/2040-51-0x00000000006E0000-0x00000000016E0000-memory.dmp

memory/2040-52-0x00000000006E0000-0x00000000016E0000-memory.dmp

memory/2040-54-0x00000000006E0000-0x00000000016E0000-memory.dmp

memory/2040-56-0x00000000006E0000-0x00000000016E0000-memory.dmp

C:\ProgramData\remcos\logs.dat

MD5 4eef9168ab508697d5d0d3ef05e6785e
SHA1 09491cb90fc57aba262324f8a4c7fcb0faf4d516
SHA256 4ff242c76ea1e366416d8b1206cef73be86c753303783f8002a83a49994101c8
SHA512 046ce2b98b34c903bcde3c10fcd1a906aa2b090cbe2905a79e040d84e14bfe4107765518bc129e58aa2fc189e45bc21c8d12fd19990848f88f13cc3d8e71dc3e

memory/2040-62-0x00000000006E0000-0x00000000016E0000-memory.dmp

memory/2040-64-0x00000000006E0000-0x00000000016E0000-memory.dmp

memory/2040-65-0x00000000006E0000-0x00000000016E0000-memory.dmp

memory/2040-67-0x00000000006E0000-0x00000000016E0000-memory.dmp

memory/2040-68-0x00000000006E0000-0x00000000016E0000-memory.dmp

memory/2040-69-0x00000000006E0000-0x00000000016E0000-memory.dmp

memory/2040-73-0x00000000006E0000-0x00000000016E0000-memory.dmp

memory/2040-74-0x00000000006E0000-0x00000000016E0000-memory.dmp

memory/2040-81-0x00000000006E0000-0x00000000016E0000-memory.dmp

memory/2040-82-0x00000000006E0000-0x00000000016E0000-memory.dmp

memory/2040-89-0x00000000006E0000-0x00000000016E0000-memory.dmp

memory/2040-90-0x00000000006E0000-0x00000000016E0000-memory.dmp