Analysis Overview
SHA256
2dd30e532f23c591e582f184dc59a2c9a0691bbfe10183af875c21313c44d436
Threat Level: Known bad
The file 84163f55a98e68a7e2cb11fe45ed507a was found to be: Known bad.
Malicious Activity Summary
UAC bypass
ModiLoader, DBatLoader
ModiLoader Second Stage
Modiloader family
ModiLoader Second Stage
Executes dropped EXE
UPX packed file
Loads dropped DLL
Deletes itself
Checks computer location settings
Checks whether UAC is enabled
Adds Run key to start application
Drops file in Windows directory
Enumerates physical storage devices
Unsigned PE
Suspicious use of WriteProcessMemory
System policy modification
Suspicious use of SetWindowsHookEx
Uses Volume Shadow Copy service COM API
Suspicious use of AdjustPrivilegeToken
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-01-31 09:43
Signatures
ModiLoader Second Stage
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Modiloader family
UPX packed file
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral2
Detonation Overview
Submitted
2024-01-31 09:43
Reported
2024-01-31 09:45
Platform
win10v2004-20231222-en
Max time kernel
148s
Max time network
152s
Command Line
Signatures
ModiLoader, DBatLoader
UAC bypass
| Description | Indicator | Process | Target |
| Set value (int) | \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" | C:\Windows\mstwain32.exe | N/A |
ModiLoader Second Stage
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
Checks computer location settings
| Description | Indicator | Process | Target |
| Key value queried | \REGISTRY\USER\S-1-5-21-1168293393-3419776239-306423207-1000\Control Panel\International\Geo\Nation | C:\Users\Admin\AppData\Local\Temp\84163f55a98e68a7e2cb11fe45ed507a.exe | N/A |
Deletes itself
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\mstwain32.exe | N/A |
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\mstwain32.exe | N/A |
Loads dropped DLL
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\mstwain32.exe | N/A |
| N/A | N/A | C:\Windows\mstwain32.exe | N/A |
| N/A | N/A | C:\Windows\mstwain32.exe | N/A |
| N/A | N/A | C:\Windows\mstwain32.exe | N/A |
UPX packed file
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
Adds Run key to start application
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\USER\S-1-5-21-1168293393-3419776239-306423207-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\mstwain32 = "C:\\Windows\\mstwain32.exe" | C:\Windows\mstwain32.exe | N/A |
Checks whether UAC is enabled
| Description | Indicator | Process | Target |
| Key value queried | \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA | C:\Users\Admin\AppData\Local\Temp\84163f55a98e68a7e2cb11fe45ed507a.exe | N/A |
| Key value queried | \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA | C:\Windows\mstwain32.exe | N/A |
| Set value (int) | \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" | C:\Windows\mstwain32.exe | N/A |
Drops file in Windows directory
| Description | Indicator | Process | Target |
| File opened for modification | C:\Windows\mstwain32.exe | C:\Users\Admin\AppData\Local\Temp\84163f55a98e68a7e2cb11fe45ed507a.exe | N/A |
| File created | C:\Windows\ntdtcstp.dll | C:\Windows\mstwain32.exe | N/A |
| File created | C:\Windows\cmsetac.dll | C:\Windows\mstwain32.exe | N/A |
| File created | C:\Windows\mstwain32.exe | C:\Users\Admin\AppData\Local\Temp\84163f55a98e68a7e2cb11fe45ed507a.exe | N/A |
Enumerates physical storage devices
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Local\Temp\84163f55a98e68a7e2cb11fe45ed507a.exe | N/A |
| Token: SeBackupPrivilege | N/A | C:\Windows\system32\vssvc.exe | N/A |
| Token: SeRestorePrivilege | N/A | C:\Windows\system32\vssvc.exe | N/A |
| Token: SeAuditPrivilege | N/A | C:\Windows\system32\vssvc.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Windows\mstwain32.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Windows\mstwain32.exe | N/A |
Suspicious use of SetWindowsHookEx
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\mstwain32.exe | N/A |
| N/A | N/A | C:\Windows\mstwain32.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 3056 wrote to memory of 2304 | N/A | C:\Users\Admin\AppData\Local\Temp\84163f55a98e68a7e2cb11fe45ed507a.exe | C:\Windows\mstwain32.exe |
| PID 3056 wrote to memory of 2304 | N/A | C:\Users\Admin\AppData\Local\Temp\84163f55a98e68a7e2cb11fe45ed507a.exe | C:\Windows\mstwain32.exe |
| PID 3056 wrote to memory of 2304 | N/A | C:\Users\Admin\AppData\Local\Temp\84163f55a98e68a7e2cb11fe45ed507a.exe | C:\Windows\mstwain32.exe |
System policy modification
| Description | Indicator | Process | Target |
| Set value (int) | \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" | C:\Windows\mstwain32.exe | N/A |
Uses Volume Shadow Copy service COM API
Processes
C:\Users\Admin\AppData\Local\Temp\84163f55a98e68a7e2cb11fe45ed507a.exe
"C:\Users\Admin\AppData\Local\Temp\84163f55a98e68a7e2cb11fe45ed507a.exe"
C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
C:\Windows\mstwain32.exe
"C:\Windows\mstwain32.exe" \melt "C:\Users\Admin\AppData\Local\Temp\84163f55a98e68a7e2cb11fe45ed507a.exe"
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 28.118.140.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 209.178.17.96.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 134.32.126.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 95.221.229.192.in-addr.arpa | udp |
| BR | 187.89.97.95:15963 | tcp | |
| US | 8.8.8.8:53 | 97.17.167.52.in-addr.arpa | udp |
| BR | 187.89.97.95:15963 | tcp | |
| BR | 187.89.97.95:15963 | tcp | |
| US | 8.8.8.8:53 | 183.59.114.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 18.31.95.13.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 217.135.221.88.in-addr.arpa | udp |
| BR | 187.89.97.95:15963 | tcp | |
| BR | 187.89.97.95:15963 | tcp | |
| BR | 187.89.97.95:15963 | tcp | |
| US | 8.8.8.8:53 | 194.178.17.96.in-addr.arpa | udp |
| BR | 187.89.97.95:15963 | tcp | |
| BR | 187.89.97.95:15963 | tcp | |
| BR | 187.89.97.95:15963 | tcp | |
| US | 8.8.8.8:53 | 29.243.111.52.in-addr.arpa | udp |
| BR | 187.89.97.95:15963 | tcp | |
| BR | 187.89.97.95:15963 | tcp | |
| BR | 187.89.97.95:15963 | tcp | |
| BR | 187.89.97.95:15963 | tcp | |
| BR | 187.89.97.95:15963 | tcp | |
| BR | 187.89.97.95:15963 | tcp |
Files
memory/3056-0-0x0000000000400000-0x0000000000450000-memory.dmp
memory/3056-1-0x00000000020D0000-0x00000000020D1000-memory.dmp
C:\Windows\mstwain32.exe
| MD5 | 84163f55a98e68a7e2cb11fe45ed507a |
| SHA1 | b35d3f9852ebde4c7d030a9853121e2e930a7a42 |
| SHA256 | 2dd30e532f23c591e582f184dc59a2c9a0691bbfe10183af875c21313c44d436 |
| SHA512 | b22c25ecd03d0c861016bfe75afcfbe46b43e5044d00bb65c384a321335a9ae353998ed3ad965dc1fe88d3324252723fce3b46892c71bb52e5910b597439cb13 |
memory/3056-11-0x0000000000400000-0x0000000000450000-memory.dmp
C:\Windows\ntdtcstp.dll
| MD5 | 67587e25a971a141628d7f07bd40ffa0 |
| SHA1 | 76fcd014539a3bb247cc0b761225f68bd6055f6b |
| SHA256 | e6829866322d68d5c5b78e3d48dcec70a41cdc42c6f357a44fd329f74a8b4378 |
| SHA512 | 6e6de7aa02c48f8b96b06e5f1160fbc5c95312320636e138cc997ef3362a61bc50ec03db1f06292eb964cd71915ddb2ec2eb741432c7da44215a4acbb576a350 |
memory/2304-19-0x0000000000920000-0x0000000000921000-memory.dmp
C:\Windows\cmsetac.dll
| MD5 | 88f1291d20aa04766107260ca801b855 |
| SHA1 | 879f99133249edc0e5d51ce13abae6e63fa75266 |
| SHA256 | e6c331208fd2946a2a073023724ea68b12b0048953413f320b3769372058a8fe |
| SHA512 | 85fa42f3c8f75df353c9541b7bbb0f94ba160248d347f3ecca61b7fa227b43a273f2459164b6dfd04147b74fe4af95c5fb9f546dc4c264d5039c91ef2820db37 |
memory/2304-23-0x00000000028E0000-0x00000000028EE000-memory.dmp
memory/2304-26-0x0000000002790000-0x0000000002791000-memory.dmp
memory/2304-27-0x0000000000980000-0x0000000000988000-memory.dmp
memory/2304-28-0x00000000028E0000-0x00000000028EE000-memory.dmp
memory/2304-29-0x0000000000400000-0x0000000000450000-memory.dmp
Analysis: behavioral1
Detonation Overview
Submitted
2024-01-31 09:43
Reported
2024-01-31 09:45
Platform
win7-20231215-en
Max time kernel
144s
Max time network
150s
Command Line
Signatures
ModiLoader, DBatLoader
UAC bypass
| Description | Indicator | Process | Target |
| Set value (int) | \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" | C:\Windows\mstwain32.exe | N/A |
ModiLoader Second Stage
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
Deletes itself
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\mstwain32.exe | N/A |
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\mstwain32.exe | N/A |
UPX packed file
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
Adds Run key to start application
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\USER\S-1-5-21-928733405-3780110381-2966456290-1000\Software\Microsoft\Windows\CurrentVersion\Run\mstwain32 = "C:\\Windows\\mstwain32.exe" | C:\Windows\mstwain32.exe | N/A |
Checks whether UAC is enabled
| Description | Indicator | Process | Target |
| Key value queried | \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA | C:\Users\Admin\AppData\Local\Temp\84163f55a98e68a7e2cb11fe45ed507a.exe | N/A |
| Key value queried | \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA | C:\Windows\mstwain32.exe | N/A |
| Set value (int) | \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" | C:\Windows\mstwain32.exe | N/A |
Drops file in Windows directory
| Description | Indicator | Process | Target |
| File created | C:\Windows\mstwain32.exe | C:\Users\Admin\AppData\Local\Temp\84163f55a98e68a7e2cb11fe45ed507a.exe | N/A |
| File opened for modification | C:\Windows\mstwain32.exe | C:\Users\Admin\AppData\Local\Temp\84163f55a98e68a7e2cb11fe45ed507a.exe | N/A |
| File created | C:\Windows\ntdtcstp.dll | C:\Windows\mstwain32.exe | N/A |
| File created | C:\Windows\cmsetac.dll | C:\Windows\mstwain32.exe | N/A |
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Local\Temp\84163f55a98e68a7e2cb11fe45ed507a.exe | N/A |
| Token: SeBackupPrivilege | N/A | C:\Windows\system32\vssvc.exe | N/A |
| Token: SeRestorePrivilege | N/A | C:\Windows\system32\vssvc.exe | N/A |
| Token: SeAuditPrivilege | N/A | C:\Windows\system32\vssvc.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Windows\mstwain32.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Windows\mstwain32.exe | N/A |
Suspicious use of SetWindowsHookEx
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\mstwain32.exe | N/A |
| N/A | N/A | C:\Windows\mstwain32.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 3032 wrote to memory of 688 | N/A | C:\Users\Admin\AppData\Local\Temp\84163f55a98e68a7e2cb11fe45ed507a.exe | C:\Windows\mstwain32.exe |
| PID 3032 wrote to memory of 688 | N/A | C:\Users\Admin\AppData\Local\Temp\84163f55a98e68a7e2cb11fe45ed507a.exe | C:\Windows\mstwain32.exe |
| PID 3032 wrote to memory of 688 | N/A | C:\Users\Admin\AppData\Local\Temp\84163f55a98e68a7e2cb11fe45ed507a.exe | C:\Windows\mstwain32.exe |
| PID 3032 wrote to memory of 688 | N/A | C:\Users\Admin\AppData\Local\Temp\84163f55a98e68a7e2cb11fe45ed507a.exe | C:\Windows\mstwain32.exe |
System policy modification
| Description | Indicator | Process | Target |
| Set value (int) | \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" | C:\Windows\mstwain32.exe | N/A |
Uses Volume Shadow Copy service COM API
Processes
C:\Users\Admin\AppData\Local\Temp\84163f55a98e68a7e2cb11fe45ed507a.exe
"C:\Users\Admin\AppData\Local\Temp\84163f55a98e68a7e2cb11fe45ed507a.exe"
C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
C:\Windows\mstwain32.exe
"C:\Windows\mstwain32.exe" \melt "C:\Users\Admin\AppData\Local\Temp\84163f55a98e68a7e2cb11fe45ed507a.exe"
Network
| Country | Destination | Domain | Proto |
| BR | 187.89.97.95:15963 | tcp | |
| BR | 187.89.97.95:15963 | tcp | |
| BR | 187.89.97.95:15963 | tcp | |
| BR | 187.89.97.95:15963 | tcp | |
| BR | 187.89.97.95:15963 | tcp | |
| BR | 187.89.97.95:15963 | tcp | |
| BR | 187.89.97.95:15963 | tcp | |
| BR | 187.89.97.95:15963 | tcp | |
| BR | 187.89.97.95:15963 | tcp | |
| BR | 187.89.97.95:15963 | tcp | |
| BR | 187.89.97.95:15963 | tcp | |
| BR | 187.89.97.95:15963 | tcp | |
| BR | 187.89.97.95:15963 | tcp | |
| BR | 187.89.97.95:15963 | tcp |
Files
memory/3032-0-0x0000000000400000-0x0000000000450000-memory.dmp
memory/3032-1-0x0000000000280000-0x0000000000281000-memory.dmp
C:\Windows\mstwain32.exe
| MD5 | 84163f55a98e68a7e2cb11fe45ed507a |
| SHA1 | b35d3f9852ebde4c7d030a9853121e2e930a7a42 |
| SHA256 | 2dd30e532f23c591e582f184dc59a2c9a0691bbfe10183af875c21313c44d436 |
| SHA512 | b22c25ecd03d0c861016bfe75afcfbe46b43e5044d00bb65c384a321335a9ae353998ed3ad965dc1fe88d3324252723fce3b46892c71bb52e5910b597439cb13 |
memory/3032-10-0x0000000000400000-0x0000000000450000-memory.dmp
memory/3032-8-0x0000000002500000-0x0000000002510000-memory.dmp
memory/688-14-0x0000000000400000-0x0000000000450000-memory.dmp
memory/3032-13-0x0000000002500000-0x000000000250D000-memory.dmp
memory/3032-12-0x0000000003340000-0x0000000003390000-memory.dmp
memory/688-18-0x00000000005E0000-0x00000000005E1000-memory.dmp
memory/688-19-0x0000000002410000-0x000000000241E000-memory.dmp
memory/688-21-0x0000000075F70000-0x0000000076060000-memory.dmp
memory/688-22-0x0000000074BD0000-0x0000000074BE4000-memory.dmp
memory/688-23-0x0000000002400000-0x0000000002401000-memory.dmp
memory/688-24-0x0000000000400000-0x0000000000450000-memory.dmp
memory/688-25-0x0000000075F70000-0x0000000076060000-memory.dmp