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Analysis
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max time kernel
149s -
max time network
152s -
platform
windows7_x64 -
resource
win7-20230220-en -
resource tags
arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system -
submitted
18/03/2023, 21:00
Behavioral task
behavioral1
Sample
43bb5ce39aa18f8d17eb1243cbf327a16b2c0b05c94dc7e2044b773d6e8193ee.exe
Resource
win7-20230220-en
Behavioral task
behavioral2
Sample
43bb5ce39aa18f8d17eb1243cbf327a16b2c0b05c94dc7e2044b773d6e8193ee.exe
Resource
win10v2004-20230220-en
General
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Target
43bb5ce39aa18f8d17eb1243cbf327a16b2c0b05c94dc7e2044b773d6e8193ee.exe
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Size
275KB
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MD5
82808f7ff9cf6b09815efb737e80aaa7
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SHA1
053d4c5f5a937c746b4768aa74062fbd825860df
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SHA256
43bb5ce39aa18f8d17eb1243cbf327a16b2c0b05c94dc7e2044b773d6e8193ee
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SHA512
c05c047ad0a593b3c946d156a13cb048fb7e10ff94fbc60ce0a2f3a9478342276597d30ad13e4802751bfd319fd8c47d2dc3029b257c2e2cc873b74f4afbc12b
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SSDEEP
6144:KG377xS2Vp2CeiorXhwTBOx53UpcCJJvH:Zr7xS2Vp6FwTFbJJvH
Malware Config
Signatures
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ModiLoader, DBatLoader
ModiLoader is a Delphi loader that misuses cloud services to download other malicious families.
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description ioc Process Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" mstwain32.exe -
ModiLoader Second Stage 17 IoCs
resource yara_rule behavioral1/files/0x00060000000055d8-58.dat modiloader_stage2 behavioral1/memory/1376-62-0x0000000000400000-0x000000000044D000-memory.dmp modiloader_stage2 behavioral1/files/0x00060000000055d8-61.dat modiloader_stage2 behavioral1/memory/1012-70-0x0000000000400000-0x000000000044D000-memory.dmp modiloader_stage2 behavioral1/memory/1012-71-0x0000000000400000-0x000000000044D000-memory.dmp modiloader_stage2 behavioral1/memory/1012-73-0x0000000000400000-0x000000000044D000-memory.dmp modiloader_stage2 behavioral1/memory/1012-74-0x0000000000400000-0x000000000044D000-memory.dmp modiloader_stage2 behavioral1/memory/1012-75-0x0000000000400000-0x000000000044D000-memory.dmp modiloader_stage2 behavioral1/memory/1012-76-0x0000000000400000-0x000000000044D000-memory.dmp modiloader_stage2 behavioral1/memory/1012-77-0x0000000000400000-0x000000000044D000-memory.dmp modiloader_stage2 behavioral1/memory/1012-78-0x0000000000400000-0x000000000044D000-memory.dmp modiloader_stage2 behavioral1/memory/1012-79-0x0000000000400000-0x000000000044D000-memory.dmp modiloader_stage2 behavioral1/memory/1012-80-0x0000000000400000-0x000000000044D000-memory.dmp modiloader_stage2 behavioral1/memory/1012-81-0x0000000000400000-0x000000000044D000-memory.dmp modiloader_stage2 behavioral1/memory/1012-82-0x0000000000400000-0x000000000044D000-memory.dmp modiloader_stage2 behavioral1/memory/1012-83-0x0000000000400000-0x000000000044D000-memory.dmp modiloader_stage2 behavioral1/memory/1012-84-0x0000000000400000-0x000000000044D000-memory.dmp modiloader_stage2 -
Deletes itself 1 IoCs
pid Process 1012 mstwain32.exe -
Executes dropped EXE 1 IoCs
pid Process 1012 mstwain32.exe -
Adds Run key to start application 2 TTPs 2 IoCs
description ioc Process Key created \REGISTRY\USER\S-1-5-21-3499517378-2376672570-1134980332-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\ mstwain32.exe Set value (str) \REGISTRY\USER\S-1-5-21-3499517378-2376672570-1134980332-1000\Software\Microsoft\Windows\CurrentVersion\Run\mstwain32 = "C:\\Windows\\mstwain32.exe" mstwain32.exe -
description ioc Process Key value queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA 43bb5ce39aa18f8d17eb1243cbf327a16b2c0b05c94dc7e2044b773d6e8193ee.exe Key value queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA mstwain32.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" mstwain32.exe -
Drops file in Windows directory 4 IoCs
description ioc Process File opened for modification C:\Windows\mstwain32.exe 43bb5ce39aa18f8d17eb1243cbf327a16b2c0b05c94dc7e2044b773d6e8193ee.exe File created C:\Windows\ntdtcstp.dll mstwain32.exe File created C:\Windows\cmsetac.dll mstwain32.exe File created C:\Windows\mstwain32.exe 43bb5ce39aa18f8d17eb1243cbf327a16b2c0b05c94dc7e2044b773d6e8193ee.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Suspicious use of AdjustPrivilegeToken 6 IoCs
description pid Process Token: SeDebugPrivilege 1376 43bb5ce39aa18f8d17eb1243cbf327a16b2c0b05c94dc7e2044b773d6e8193ee.exe Token: SeBackupPrivilege 1348 vssvc.exe Token: SeRestorePrivilege 1348 vssvc.exe Token: SeAuditPrivilege 1348 vssvc.exe Token: SeDebugPrivilege 1012 mstwain32.exe Token: SeDebugPrivilege 1012 mstwain32.exe -
Suspicious use of SetWindowsHookEx 2 IoCs
pid Process 1012 mstwain32.exe 1012 mstwain32.exe -
Suspicious use of WriteProcessMemory 4 IoCs
description pid Process procid_target PID 1376 wrote to memory of 1012 1376 43bb5ce39aa18f8d17eb1243cbf327a16b2c0b05c94dc7e2044b773d6e8193ee.exe 31 PID 1376 wrote to memory of 1012 1376 43bb5ce39aa18f8d17eb1243cbf327a16b2c0b05c94dc7e2044b773d6e8193ee.exe 31 PID 1376 wrote to memory of 1012 1376 43bb5ce39aa18f8d17eb1243cbf327a16b2c0b05c94dc7e2044b773d6e8193ee.exe 31 PID 1376 wrote to memory of 1012 1376 43bb5ce39aa18f8d17eb1243cbf327a16b2c0b05c94dc7e2044b773d6e8193ee.exe 31 -
System policy modification 1 TTPs 1 IoCs
description ioc Process Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" mstwain32.exe -
Uses Volume Shadow Copy service COM API
The Volume Shadow Copy service is used to manage backups/snapshots.
Processes
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C:\Users\Admin\AppData\Local\Temp\43bb5ce39aa18f8d17eb1243cbf327a16b2c0b05c94dc7e2044b773d6e8193ee.exe"C:\Users\Admin\AppData\Local\Temp\43bb5ce39aa18f8d17eb1243cbf327a16b2c0b05c94dc7e2044b773d6e8193ee.exe"1⤵
- Checks whether UAC is enabled
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1376 -
C:\Windows\mstwain32.exe"C:\Windows\mstwain32.exe" \melt "C:\Users\Admin\AppData\Local\Temp\43bb5ce39aa18f8d17eb1243cbf327a16b2c0b05c94dc7e2044b773d6e8193ee.exe"2⤵
- UAC bypass
- Deletes itself
- Executes dropped EXE
- Adds Run key to start application
- Checks whether UAC is enabled
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- System policy modification
PID:1012
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C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1348
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
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Filesize
275KB
MD582808f7ff9cf6b09815efb737e80aaa7
SHA1053d4c5f5a937c746b4768aa74062fbd825860df
SHA25643bb5ce39aa18f8d17eb1243cbf327a16b2c0b05c94dc7e2044b773d6e8193ee
SHA512c05c047ad0a593b3c946d156a13cb048fb7e10ff94fbc60ce0a2f3a9478342276597d30ad13e4802751bfd319fd8c47d2dc3029b257c2e2cc873b74f4afbc12b
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Filesize
275KB
MD582808f7ff9cf6b09815efb737e80aaa7
SHA1053d4c5f5a937c746b4768aa74062fbd825860df
SHA25643bb5ce39aa18f8d17eb1243cbf327a16b2c0b05c94dc7e2044b773d6e8193ee
SHA512c05c047ad0a593b3c946d156a13cb048fb7e10ff94fbc60ce0a2f3a9478342276597d30ad13e4802751bfd319fd8c47d2dc3029b257c2e2cc873b74f4afbc12b