Malware Analysis Report

2025-01-02 03:17

Sample ID 240325-pp3ygaae4y
Target Document.exe
SHA256 88c21447120abe15f0da3d0ce1dfa63e1c5e4ef52415ed177728cd229507eb83
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

88c21447120abe15f0da3d0ce1dfa63e1c5e4ef52415ed177728cd229507eb83

Threat Level: Known bad

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

Malicious Activity Summary

modiloader trojan remcos remotehost persistence rat

ModiLoader, DBatLoader

Remcos

ModiLoader Second Stage

Executes dropped EXE

Loads dropped DLL

Adds Run key to start application

Unsigned PE

Program crash

Suspicious use of SetWindowsHookEx

Suspicious use of WriteProcessMemory

Script User-Agent

Suspicious behavior: EnumeratesProcesses

Suspicious use of AdjustPrivilegeToken

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-03-25 12:31

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-03-25 12:31

Reported

2024-03-25 12:33

Platform

win7-20240221-en

Max time kernel

130s

Max time network

135s

Command Line

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

Signatures

ModiLoader, DBatLoader

trojan modiloader

ModiLoader Second Stage

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

Program crash

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

Script User-Agent

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

Processes

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

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

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2960 -s 712

Network

Country Destination Domain Proto
US 8.8.8.8:53 2016.filemail.com udp
GB 50.7.154.226:443 2016.filemail.com tcp
GB 50.7.154.226:443 2016.filemail.com tcp

Files

memory/2960-0-0x00000000001B0000-0x00000000001B1000-memory.dmp

memory/2960-1-0x0000000002F40000-0x0000000003F40000-memory.dmp

memory/2960-2-0x0000000002F40000-0x0000000003F40000-memory.dmp

memory/2960-4-0x00000000001B0000-0x00000000001B1000-memory.dmp

memory/2960-5-0x0000000000400000-0x000000000053C000-memory.dmp

C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\94308059B57B3142E455B38A6EB92015

MD5 753df6889fd7410a2e9fe333da83a429
SHA1 3c425f16e8267186061dd48ac1c77c122962456e
SHA256 b42dc237e44cbc9a43400e7d3f9cbd406dbdefd62bfe87328f8663897d69df78
SHA512 9d56f79410ad0cf852c74c3ef9454e7ae86e80bdd6ff67773994b48ccac71142bcf5c90635da6a056e1406e81e64674db9584928e867c55b77b59e2851cf6444

C:\Users\Admin\AppData\Local\Temp\Tar8878.tmp

MD5 dd73cead4b93366cf3465c8cd32e2796
SHA1 74546226dfe9ceb8184651e920d1dbfb432b314e
SHA256 a6752b7851b591550e4625b832a393aabcc428de18d83e8593cd540f7d7cae22
SHA512 ce1bdd595065c94fa528badf4a6a8777893807d6789267612755df818ba6ffe55e4df429710aea29526ee4aa8ef20e25f2f05341da53992157d21ae032c0fb63

Analysis: behavioral2

Detonation Overview

Submitted

2024-03-25 12:31

Reported

2024-03-25 12:33

Platform

win10v2004-20240226-en

Max time kernel

151s

Max time network

160s

Command Line

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

Signatures

ModiLoader, DBatLoader

trojan modiloader

Remcos

rat remcos

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\370964.exe N/A

Loads dropped DLL

Description Indicator Process Target
N/A N/A C:\Windows \System32\370964.exe N/A

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-609813121-2907144057-1731107329-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Ejuqejhd = "C:\\Users\\Public\\Ejuqejhd.url" C:\Users\Admin\AppData\Local\Temp\Document.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 4992 wrote to memory of 440 N/A C:\Users\Admin\AppData\Local\Temp\Document.exe C:\Windows\SysWOW64\cmd.exe
PID 4992 wrote to memory of 440 N/A C:\Users\Admin\AppData\Local\Temp\Document.exe C:\Windows\SysWOW64\cmd.exe
PID 4992 wrote to memory of 440 N/A C:\Users\Admin\AppData\Local\Temp\Document.exe C:\Windows\SysWOW64\cmd.exe
PID 4992 wrote to memory of 3944 N/A C:\Users\Admin\AppData\Local\Temp\Document.exe C:\Windows\SysWOW64\cmd.exe
PID 4992 wrote to memory of 3944 N/A C:\Users\Admin\AppData\Local\Temp\Document.exe C:\Windows\SysWOW64\cmd.exe
PID 4992 wrote to memory of 3944 N/A C:\Users\Admin\AppData\Local\Temp\Document.exe C:\Windows\SysWOW64\cmd.exe
PID 4992 wrote to memory of 4784 N/A C:\Users\Admin\AppData\Local\Temp\Document.exe C:\Windows\SysWOW64\cmd.exe
PID 4992 wrote to memory of 4784 N/A C:\Users\Admin\AppData\Local\Temp\Document.exe C:\Windows\SysWOW64\cmd.exe
PID 4992 wrote to memory of 4784 N/A C:\Users\Admin\AppData\Local\Temp\Document.exe C:\Windows\SysWOW64\cmd.exe
PID 4784 wrote to memory of 1004 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows \System32\370964.exe
PID 4784 wrote to memory of 1004 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows \System32\370964.exe
PID 1004 wrote to memory of 3952 N/A C:\Windows \System32\370964.exe C:\Windows\system32\cmd.exe
PID 1004 wrote to memory of 3952 N/A C:\Windows \System32\370964.exe C:\Windows\system32\cmd.exe
PID 3952 wrote to memory of 1720 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\cmd.exe
PID 3952 wrote to memory of 1720 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\cmd.exe
PID 1720 wrote to memory of 912 N/A C:\Windows\system32\cmd.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 1720 wrote to memory of 912 N/A C:\Windows\system32\cmd.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 4992 wrote to memory of 3368 N/A C:\Users\Admin\AppData\Local\Temp\Document.exe C:\Windows\SysWOW64\extrac32.exe
PID 4992 wrote to memory of 3368 N/A C:\Users\Admin\AppData\Local\Temp\Document.exe C:\Windows\SysWOW64\extrac32.exe
PID 4992 wrote to memory of 3368 N/A C:\Users\Admin\AppData\Local\Temp\Document.exe C:\Windows\SysWOW64\extrac32.exe
PID 4992 wrote to memory of 5072 N/A C:\Users\Admin\AppData\Local\Temp\Document.exe C:\Windows\SysWOW64\colorcpl.exe
PID 4992 wrote to memory of 5072 N/A C:\Users\Admin\AppData\Local\Temp\Document.exe C:\Windows\SysWOW64\colorcpl.exe
PID 4992 wrote to memory of 5072 N/A C:\Users\Admin\AppData\Local\Temp\Document.exe C:\Windows\SysWOW64\colorcpl.exe
PID 4992 wrote to memory of 5072 N/A C:\Users\Admin\AppData\Local\Temp\Document.exe C:\Windows\SysWOW64\colorcpl.exe

Processes

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

"C:\Users\Admin\AppData\Local\Temp\Document.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\370964.exe"

C:\Windows \System32\370964.exe

"C:\Windows \System32\370964.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\Document.exe C:\\Users\\Public\\Libraries\\Ejuqejhd.PIF

C:\Windows\SysWOW64\colorcpl.exe

C:\Windows\System32\colorcpl.exe

Network

Country Destination Domain Proto
US 8.8.8.8:53 217.106.137.52.in-addr.arpa udp
US 8.8.8.8:53 198.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 69.31.126.40.in-addr.arpa udp
US 8.8.8.8:53 88.156.103.20.in-addr.arpa udp
US 8.8.8.8:53 2016.filemail.com udp
GB 50.7.154.226:443 2016.filemail.com tcp
GB 50.7.154.226:443 2016.filemail.com tcp
US 8.8.8.8:53 226.154.7.50.in-addr.arpa udp
US 8.8.8.8:53 209.205.72.20.in-addr.arpa udp
NL 52.142.223.178:80 tcp
US 8.8.8.8:53 58.55.71.13.in-addr.arpa udp
US 8.8.8.8:53 183.59.114.20.in-addr.arpa udp
US 8.8.8.8:53 officerem.duckdns.org udp
US 23.95.235.29:47212 officerem.duckdns.org tcp
N/A 127.0.0.1:47212 tcp
US 8.8.8.8:53 29.235.95.23.in-addr.arpa udp
US 8.8.8.8:53 198.187.3.20.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 8.8.8.8:53 217.135.221.88.in-addr.arpa udp
US 8.8.8.8:53 205.47.74.20.in-addr.arpa 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
US 8.8.8.8:53 200.197.79.204.in-addr.arpa udp
US 8.8.8.8:53 208.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 23.236.111.52.in-addr.arpa udp
US 8.8.8.8:53 91.16.208.104.in-addr.arpa udp

Files

memory/4992-0-0x0000000002330000-0x0000000002331000-memory.dmp

memory/4992-1-0x0000000002A70000-0x0000000003A70000-memory.dmp

memory/4992-2-0x0000000002A70000-0x0000000003A70000-memory.dmp

memory/4992-4-0x0000000000400000-0x000000000053C000-memory.dmp

C:\Windows \System32\370964.exe

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

C:\Windows \System32\netutils.dll

MD5 fa7aa88417d0c48807144a1a48fe3fbc
SHA1 6f5ec990b12d4a6075050a94e0d68d03781fa46d
SHA256 2019dcd18ba7d5554a4a9da882740aa883941670af3de9396960081a0f8aa098
SHA512 99b2eb6f8e7d00a3803cba229149e5e0cb67a3deb607782c55fbacd25d9c074cce83759de15490eff939d5ad98f26cdbd44395cc79ffe22753e16c3d9e3b5fff

memory/1004-16-0x00000000613C0000-0x00000000613E3000-memory.dmp

C:\windows \system32\KDECO.bat

MD5 c545650595b479c81ad6b9d8882aae39
SHA1 7a98aa2e6eee23b3c1bba876955d525bc618b3f0
SHA256 a3a80983cb33159f0455fa0135789402558baa1460db94d0071318512b8cb5f9
SHA512 85ac596a7da9072a28c4178e4fdedc98f1b49c8e3fe5612cfe464833297b13f65d2dc59b52d7fc9970cff8f98d954111229aec0ed9dded454e03b0cf4ebb6ff3

memory/912-18-0x000002BC1C690000-0x000002BC1C6B2000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_hlpl3kvu.rw1.ps1

MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

memory/912-28-0x00007FF9B4A40000-0x00007FF9B5501000-memory.dmp

memory/912-29-0x000002BC1A510000-0x000002BC1A520000-memory.dmp

memory/912-30-0x000002BC1A510000-0x000002BC1A520000-memory.dmp

memory/912-33-0x00007FF9B4A40000-0x00007FF9B5501000-memory.dmp

memory/5072-40-0x00000000006E0000-0x00000000016E0000-memory.dmp

memory/5072-42-0x00000000006E0000-0x00000000016E0000-memory.dmp

memory/5072-43-0x00000000006E0000-0x00000000016E0000-memory.dmp

memory/5072-44-0x00000000006E0000-0x00000000016E0000-memory.dmp

memory/5072-45-0x00000000006E0000-0x00000000016E0000-memory.dmp

memory/5072-46-0x00000000006E0000-0x00000000016E0000-memory.dmp

memory/5072-48-0x00000000006E0000-0x00000000016E0000-memory.dmp

memory/5072-49-0x00000000006E0000-0x00000000016E0000-memory.dmp

memory/5072-50-0x00000000006E0000-0x00000000016E0000-memory.dmp

memory/5072-52-0x00000000006E0000-0x00000000016E0000-memory.dmp

C:\ProgramData\remcos\logs.dat

MD5 add3e1275be6a1c9967f429ce66f7853
SHA1 a709f50bc9b3ecde6fd11c7cf21402bc17f39093
SHA256 f8d238d0144640879d27c96e5c9d312ec082b21e08ae49de47d588320ccf8abe
SHA512 63d25be297cc62bfc6c69adca6bc1b50da199fccac761f991c0eac0b5aa04d2be12179e0a242fa2fac07109b33e13e340acd907ae5517dc20c769da55d0e0f3b

memory/5072-57-0x00000000006E0000-0x00000000016E0000-memory.dmp

memory/5072-58-0x00000000006E0000-0x00000000016E0000-memory.dmp

memory/5072-65-0x00000000006E0000-0x00000000016E0000-memory.dmp

memory/5072-66-0x00000000006E0000-0x00000000016E0000-memory.dmp

memory/5072-73-0x00000000006E0000-0x00000000016E0000-memory.dmp

memory/5072-74-0x00000000006E0000-0x00000000016E0000-memory.dmp

memory/5072-81-0x00000000006E0000-0x00000000016E0000-memory.dmp

memory/5072-82-0x00000000006E0000-0x00000000016E0000-memory.dmp