Analysis Overview
SHA256
4a2c6fb7bb7678610a7d39de3497f9db1476dc5a7d8d1b29fd9f0e881816c366
Threat Level: Known bad
The file PROFORMA INVOICE.tar.gz was found to be: Known bad.
Malicious Activity Summary
Remcos
ModiLoader, DBatLoader
ModiLoader Second Stage
Executes dropped EXE
Loads dropped DLL
Adds Run key to start application
Enumerates physical storage devices
Unsigned PE
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Suspicious use of SetWindowsHookEx
Script User-Agent
Suspicious behavior: EnumeratesProcesses
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-04-03 11:17
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-04-03 11:17
Reported
2024-04-03 11:19
Platform
win7-20240221-en
Max time kernel
134s
Max time network
150s
Command Line
Signatures
ModiLoader, DBatLoader
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\4930906.exe | N/A |
| N/A | N/A | C:\Windows \System32\4930906.exe | N/A |
Adds Run key to start application
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\USER\S-1-5-21-330940541-141609230-1670313778-1000\Software\Microsoft\Windows\CurrentVersion\Run\Uajcyryw = "C:\\Users\\Public\\Uajcyryw.url" | C:\Users\Admin\AppData\Local\Temp\PROFORMA INVOICE.exe | N/A |
Enumerates physical storage devices
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 SetWindowsHookEx
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\PROFORMA INVOICE.exe | N/A |
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\PROFORMA INVOICE.exe
"C:\Users\Admin\AppData\Local\Temp\PROFORMA INVOICE.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\4930906.exe"
C:\Windows \System32\4930906.exe
"C:\Windows \System32\4930906.exe"
C:\Windows \System32\4930906.exe
"C:\Windows \System32\4930906.exe"
C:\Windows\SysWOW64\extrac32.exe
C:\\Windows\\System32\\extrac32.exe /C /Y C:\Users\Admin\AppData\Local\Temp\PROFORMA INVOICE.exe C:\\Users\\Public\\Libraries\\Uajcyryw.PIF
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 2017.filemail.com | udp |
| GB | 50.7.154.234:443 | 2017.filemail.com | tcp |
| GB | 50.7.154.234:443 | 2017.filemail.com | 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 | geoplugin.net | udp |
| NL | 178.237.33.50:80 | geoplugin.net | tcp |
| N/A | 127.0.0.1:47212 | tcp |
Files
memory/1284-0-0x00000000001B0000-0x00000000001B1000-memory.dmp
memory/1284-1-0x0000000002CD0000-0x0000000003CD0000-memory.dmp
memory/1284-2-0x0000000002CD0000-0x0000000003CD0000-memory.dmp
memory/1284-4-0x00000000001B0000-0x00000000001B1000-memory.dmp
memory/1284-5-0x0000000000400000-0x00000000005AF000-memory.dmp
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\94308059B57B3142E455B38A6EB92015
| MD5 | 29f65ba8e88c063813cc50a4ea544e93 |
| SHA1 | 05a7040d5c127e68c25d81cc51271ffb8bef3568 |
| SHA256 | 1ed81fa8dfb6999a9fedc6e779138ffd99568992e22d300acd181a6d2c8de184 |
| SHA512 | e29b2e92c496245bed3372578074407e8ef8882906ce10c35b3c8deebfefe01b5fd7f3030acaa693e175f4b7aca6cd7d8d10ae1c731b09c5fa19035e005de3aa |
C:\Users\Admin\AppData\Local\Temp\TarB320.tmp
| MD5 | 435a9ac180383f9fa094131b173a2f7b |
| SHA1 | 76944ea657a9db94f9a4bef38f88c46ed4166983 |
| SHA256 | 67dc37ed50b8e63272b49a254a6039ee225974f1d767bb83eb1fd80e759a7c34 |
| SHA512 | 1a6b277611959720a9c71114957620517ad94541302f164eb872bd322292a952409bafb8bc2ac793b16ad5f25d83f8594ccff2b7834e3c2b2b941e6fc84c009a |
C:\Windows \System32\4930906.exe
| MD5 | 231ce1e1d7d98b44371ffff407d68b59 |
| SHA1 | 25510d0f6353dbf0c9f72fc880de7585e34b28ff |
| SHA256 | 30951db8bfc21640645aa9144cfeaa294bb7c6980ef236d28552b6f4f3f92a96 |
| SHA512 | 520887b01bda96b7c4f91b9330a5c03a12f7c7f266d4359432e7bacc76b0eef377c05a4361f8fa80ad0b94b5865699d747a5d94a2d3dcdb85dabf5887bb6c612 |
memory/2844-67-0x0000000002170000-0x0000000002171000-memory.dmp
memory/1284-80-0x0000000015BF0000-0x0000000016BF0000-memory.dmp
memory/1284-82-0x0000000015BF0000-0x0000000016BF0000-memory.dmp
memory/1284-83-0x0000000015BF0000-0x0000000016BF0000-memory.dmp
memory/1284-84-0x0000000015BF0000-0x0000000016BF0000-memory.dmp
memory/1284-86-0x0000000015BF0000-0x0000000016BF0000-memory.dmp
memory/1284-85-0x0000000015BF0000-0x0000000016BF0000-memory.dmp
memory/1284-87-0x0000000015BF0000-0x0000000016BF0000-memory.dmp
memory/1284-88-0x0000000015BF0000-0x0000000016BF0000-memory.dmp
memory/1284-89-0x0000000015BF0000-0x0000000016BF0000-memory.dmp
memory/1284-91-0x0000000015BF0000-0x0000000016BF0000-memory.dmp
memory/1284-98-0x0000000015BF0000-0x0000000016BF0000-memory.dmp
memory/1284-99-0x0000000015BF0000-0x0000000016BF0000-memory.dmp
C:\ProgramData\remcos\logs.dat
| MD5 | 7e980fc1c9818f9bf58077d154ddd777 |
| SHA1 | 69b5a2c255eb62fa0caf77547ba1b8e333b8465d |
| SHA256 | 571d46819600df5105d1d83515ddbc657070a24642f223689f32a5836009cfc2 |
| SHA512 | fe1cb29ab1772065e2149ec8324b7127bbb49adb1959d55924cce37ed09c43c42a5e6b54b3e36dbd3a3ec25d5ec3bd79b43fa9d2cbdb98f659fa202a01e7a7fe |
memory/1284-108-0x0000000015BF0000-0x0000000016BF0000-memory.dmp
memory/1284-109-0x0000000015BF0000-0x0000000016BF0000-memory.dmp
memory/1284-118-0x0000000015BF0000-0x0000000016BF0000-memory.dmp
memory/1284-119-0x0000000015BF0000-0x0000000016BF0000-memory.dmp
memory/1284-128-0x0000000015BF0000-0x0000000016BF0000-memory.dmp
memory/1284-129-0x0000000015BF0000-0x0000000016BF0000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2024-04-03 11:17
Reported
2024-04-03 11:19
Platform
win10v2004-20240226-en
Max time kernel
149s
Max time network
152s
Command Line
Signatures
ModiLoader, DBatLoader
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\1808195.exe | N/A |
Loads dropped DLL
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows \System32\1808195.exe | N/A |
Adds Run key to start application
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\USER\S-1-5-21-513485977-2495024337-1260977654-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Uajcyryw = "C:\\Users\\Public\\Uajcyryw.url" | C:\Users\Admin\AppData\Local\Temp\PROFORMA INVOICE.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 behavior: EnumeratesProcesses
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe | N/A |
| N/A | N/A | C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe | 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:\Users\Admin\AppData\Local\Temp\PROFORMA INVOICE.exe | N/A |
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\PROFORMA INVOICE.exe
"C:\Users\Admin\AppData\Local\Temp\PROFORMA INVOICE.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\1808195.exe"
C:\Windows \System32\1808195.exe
"C:\Windows \System32\1808195.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\PROFORMA INVOICE.exe C:\\Users\\Public\\Libraries\\Uajcyryw.PIF
Network
| Country | Destination | Domain | Proto |
| GB | 23.44.234.16:80 | tcp | |
| US | 8.8.8.8:53 | 79.121.231.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 196.249.167.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 138.111.86.104.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 68.159.190.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 2017.filemail.com | udp |
| GB | 50.7.154.234:443 | 2017.filemail.com | tcp |
| GB | 50.7.154.234:443 | 2017.filemail.com | tcp |
| US | 8.8.8.8:53 | 234.154.7.50.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 28.118.140.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 57.162.23.2.in-addr.arpa | udp |
| N/A | 127.0.0.1:47212 | 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 | 50.23.12.20.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 | 206.23.85.13.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 240.221.184.93.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 202.110.86.104.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 43.229.111.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 160.111.86.104.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 90.16.208.104.in-addr.arpa | udp |
Files
memory/2108-0-0x0000000000A40000-0x0000000000A41000-memory.dmp
memory/2108-1-0x00000000028D0000-0x00000000038D0000-memory.dmp
memory/2108-2-0x00000000028D0000-0x00000000038D0000-memory.dmp
memory/2108-4-0x0000000000400000-0x00000000005AF000-memory.dmp
C:\Windows \System32\1808195.exe
| MD5 | 231ce1e1d7d98b44371ffff407d68b59 |
| SHA1 | 25510d0f6353dbf0c9f72fc880de7585e34b28ff |
| SHA256 | 30951db8bfc21640645aa9144cfeaa294bb7c6980ef236d28552b6f4f3f92a96 |
| SHA512 | 520887b01bda96b7c4f91b9330a5c03a12f7c7f266d4359432e7bacc76b0eef377c05a4361f8fa80ad0b94b5865699d747a5d94a2d3dcdb85dabf5887bb6c612 |
C:\Windows \System32\netutils.dll
| MD5 | 8541304aadba4ae8620bb2699f6e0437 |
| SHA1 | e0b28a6ecd32d3789433217364c1006de9892df8 |
| SHA256 | 50573c81e5773c13a5411e8446d7fb17956865675782239818f7affd40a2fecb |
| SHA512 | c18b1233c138229705242e1cdc00970e45e414d8da9c643b1196ec9de261ae18076e22bed6fcc48c07d1f0e851469db9147f083f3c3c76a26b75994419392455 |
memory/552-15-0x00000000613C0000-0x00000000613E3000-memory.dmp
C:\windows \system32\KDECO.bat
| MD5 | c545650595b479c81ad6b9d8882aae39 |
| SHA1 | 7a98aa2e6eee23b3c1bba876955d525bc618b3f0 |
| SHA256 | a3a80983cb33159f0455fa0135789402558baa1460db94d0071318512b8cb5f9 |
| SHA512 | 85ac596a7da9072a28c4178e4fdedc98f1b49c8e3fe5612cfe464833297b13f65d2dc59b52d7fc9970cff8f98d954111229aec0ed9dded454e03b0cf4ebb6ff3 |
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_k51ko2iu.qsl.ps1
| MD5 | d17fe0a3f47be24a6453e9ef58c94641 |
| SHA1 | 6ab83620379fc69f80c0242105ddffd7d98d5d9d |
| SHA256 | 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7 |
| SHA512 | 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82 |
memory/3864-26-0x000001F97E4C0000-0x000001F97E4E2000-memory.dmp
memory/3864-27-0x00007FFDE4D60000-0x00007FFDE5821000-memory.dmp
memory/3864-29-0x000001F963C60000-0x000001F963C70000-memory.dmp
memory/3864-28-0x000001F963C60000-0x000001F963C70000-memory.dmp
memory/3864-32-0x00007FFDE4D60000-0x00007FFDE5821000-memory.dmp
memory/2108-36-0x0000000015150000-0x0000000016150000-memory.dmp
memory/2108-38-0x0000000015150000-0x0000000016150000-memory.dmp
memory/2108-39-0x0000000015150000-0x0000000016150000-memory.dmp
memory/2108-40-0x0000000015150000-0x0000000016150000-memory.dmp
memory/2108-42-0x0000000015150000-0x0000000016150000-memory.dmp
memory/2108-43-0x0000000015150000-0x0000000016150000-memory.dmp
memory/2108-44-0x0000000015150000-0x0000000016150000-memory.dmp
memory/2108-45-0x0000000015150000-0x0000000016150000-memory.dmp
memory/2108-46-0x0000000015150000-0x0000000016150000-memory.dmp
C:\ProgramData\remcos\logs.dat
| MD5 | 4fc64315f03c6c7e12cf608534459210 |
| SHA1 | cd6d6dbc88a69fbc79fc0868eada3095da87d421 |
| SHA256 | 56a5d5854764f5bce8e1bdf5fce06989a146ce41872a4aeb602baf85a5226029 |
| SHA512 | ac7b94b4019f4ab9551f8a159b403dae9ccb5a10cfb4b53aae733c62a21b4e84cd65afee529e8bf43d0c08b8eebb13781510006b064f1b3177b536144b8a5875 |
memory/2108-54-0x0000000015150000-0x0000000016150000-memory.dmp
memory/2108-56-0x0000000015150000-0x0000000016150000-memory.dmp
memory/2108-65-0x0000000015150000-0x0000000016150000-memory.dmp
memory/2108-67-0x0000000015150000-0x0000000016150000-memory.dmp
memory/2108-76-0x0000000015150000-0x0000000016150000-memory.dmp
memory/2108-78-0x0000000015150000-0x0000000016150000-memory.dmp
memory/2108-87-0x0000000015150000-0x0000000016150000-memory.dmp
memory/2108-89-0x0000000015150000-0x0000000016150000-memory.dmp