Analysis
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max time kernel
144s -
max time network
144s -
platform
windows7_x64 -
resource
win7-20231215-en -
resource tags
arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system -
submitted
03/02/2024, 14:17
Behavioral task
behavioral1
Sample
8c8a12ad071e2916f1601a12879c14dd.exe
Resource
win7-20231215-en
Behavioral task
behavioral2
Sample
8c8a12ad071e2916f1601a12879c14dd.exe
Resource
win10v2004-20231222-en
General
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Target
8c8a12ad071e2916f1601a12879c14dd.exe
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Size
115KB
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MD5
8c8a12ad071e2916f1601a12879c14dd
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SHA1
33c46d051870a085f7731626fc327975134a1559
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SHA256
f71318cf8ed1b720cae18bbbc39486327f4d982d6ff02ec0b571ac2b6945c195
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SHA512
ef9c89ed4c86d2b899b7785ba1417b3d53053baea0947107e32e92433416b03fa7238ee6bf3b9f35701881143c7868b3e950d0d267e6ef52790ed1f2dfabc055
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SSDEEP
3072:W1+MJKrUnFYY5z1i0Nmbi5fJBNIVFr5eoutu:eIrPj0NmWtNIDr5eoSu
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/memory/2976-15-0x0000000000400000-0x0000000000452000-memory.dmp modiloader_stage2 behavioral1/memory/1752-12-0x0000000000400000-0x0000000000452000-memory.dmp modiloader_stage2 behavioral1/memory/2976-25-0x0000000000400000-0x0000000000452000-memory.dmp modiloader_stage2 behavioral1/memory/2976-27-0x0000000000400000-0x0000000000452000-memory.dmp modiloader_stage2 behavioral1/memory/2976-28-0x0000000000400000-0x0000000000452000-memory.dmp modiloader_stage2 behavioral1/memory/2976-30-0x0000000000400000-0x0000000000452000-memory.dmp modiloader_stage2 behavioral1/memory/2976-31-0x0000000000400000-0x0000000000452000-memory.dmp modiloader_stage2 behavioral1/memory/2976-32-0x0000000000400000-0x0000000000452000-memory.dmp modiloader_stage2 behavioral1/memory/2976-34-0x0000000000400000-0x0000000000452000-memory.dmp modiloader_stage2 behavioral1/memory/2976-35-0x0000000000400000-0x0000000000452000-memory.dmp modiloader_stage2 behavioral1/memory/2976-36-0x0000000000400000-0x0000000000452000-memory.dmp modiloader_stage2 behavioral1/memory/2976-37-0x0000000000400000-0x0000000000452000-memory.dmp modiloader_stage2 behavioral1/memory/2976-38-0x0000000000400000-0x0000000000452000-memory.dmp modiloader_stage2 behavioral1/memory/2976-39-0x0000000000400000-0x0000000000452000-memory.dmp modiloader_stage2 behavioral1/memory/2976-40-0x0000000000400000-0x0000000000452000-memory.dmp modiloader_stage2 behavioral1/memory/2976-41-0x0000000000400000-0x0000000000452000-memory.dmp modiloader_stage2 behavioral1/memory/2976-42-0x0000000000400000-0x0000000000452000-memory.dmp modiloader_stage2 -
Deletes itself 1 IoCs
pid Process 2976 mstwain32.exe -
Executes dropped EXE 1 IoCs
pid Process 2976 mstwain32.exe -
resource yara_rule behavioral1/memory/1752-0-0x0000000000400000-0x0000000000452000-memory.dmp upx behavioral1/files/0x00060000000055a9-7.dat upx behavioral1/memory/2976-15-0x0000000000400000-0x0000000000452000-memory.dmp upx behavioral1/memory/1752-12-0x0000000000400000-0x0000000000452000-memory.dmp upx behavioral1/memory/2976-25-0x0000000000400000-0x0000000000452000-memory.dmp upx behavioral1/memory/2976-27-0x0000000000400000-0x0000000000452000-memory.dmp upx behavioral1/memory/2976-28-0x0000000000400000-0x0000000000452000-memory.dmp upx behavioral1/memory/2976-30-0x0000000000400000-0x0000000000452000-memory.dmp upx behavioral1/memory/2976-31-0x0000000000400000-0x0000000000452000-memory.dmp upx behavioral1/memory/2976-32-0x0000000000400000-0x0000000000452000-memory.dmp upx behavioral1/memory/2976-34-0x0000000000400000-0x0000000000452000-memory.dmp upx behavioral1/memory/2976-35-0x0000000000400000-0x0000000000452000-memory.dmp upx behavioral1/memory/2976-36-0x0000000000400000-0x0000000000452000-memory.dmp upx behavioral1/memory/2976-37-0x0000000000400000-0x0000000000452000-memory.dmp upx behavioral1/memory/2976-38-0x0000000000400000-0x0000000000452000-memory.dmp upx behavioral1/memory/2976-39-0x0000000000400000-0x0000000000452000-memory.dmp upx behavioral1/memory/2976-40-0x0000000000400000-0x0000000000452000-memory.dmp upx behavioral1/memory/2976-41-0x0000000000400000-0x0000000000452000-memory.dmp upx behavioral1/memory/2976-42-0x0000000000400000-0x0000000000452000-memory.dmp upx -
Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-3818056530-936619650-3554021955-1000\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 8c8a12ad071e2916f1601a12879c14dd.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 created C:\Windows\cmsetac.dll mstwain32.exe File created C:\Windows\mstwain32.exe 8c8a12ad071e2916f1601a12879c14dd.exe File opened for modification C:\Windows\mstwain32.exe 8c8a12ad071e2916f1601a12879c14dd.exe File created C:\Windows\ntdtcstp.dll mstwain32.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Suspicious use of AdjustPrivilegeToken 6 IoCs
description pid Process Token: SeDebugPrivilege 1752 8c8a12ad071e2916f1601a12879c14dd.exe Token: SeBackupPrivilege 2916 vssvc.exe Token: SeRestorePrivilege 2916 vssvc.exe Token: SeAuditPrivilege 2916 vssvc.exe Token: SeDebugPrivilege 2976 mstwain32.exe Token: SeDebugPrivilege 2976 mstwain32.exe -
Suspicious use of FindShellTrayWindow 1 IoCs
pid Process 1752 8c8a12ad071e2916f1601a12879c14dd.exe -
Suspicious use of SetWindowsHookEx 2 IoCs
pid Process 2976 mstwain32.exe 2976 mstwain32.exe -
Suspicious use of WriteProcessMemory 4 IoCs
description pid Process procid_target PID 1752 wrote to memory of 2976 1752 8c8a12ad071e2916f1601a12879c14dd.exe 31 PID 1752 wrote to memory of 2976 1752 8c8a12ad071e2916f1601a12879c14dd.exe 31 PID 1752 wrote to memory of 2976 1752 8c8a12ad071e2916f1601a12879c14dd.exe 31 PID 1752 wrote to memory of 2976 1752 8c8a12ad071e2916f1601a12879c14dd.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\8c8a12ad071e2916f1601a12879c14dd.exe"C:\Users\Admin\AppData\Local\Temp\8c8a12ad071e2916f1601a12879c14dd.exe"1⤵
- Checks whether UAC is enabled
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of WriteProcessMemory
PID:1752 -
C:\Windows\mstwain32.exe"C:\Windows\mstwain32.exe" \melt "C:\Users\Admin\AppData\Local\Temp\8c8a12ad071e2916f1601a12879c14dd.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:2976
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C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2916
Network
MITRE ATT&CK Enterprise v15
Privilege Escalation
Abuse Elevation Control Mechanism
1Bypass User Account Control
1Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Replay Monitor
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Downloads
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Filesize
115KB
MD58c8a12ad071e2916f1601a12879c14dd
SHA133c46d051870a085f7731626fc327975134a1559
SHA256f71318cf8ed1b720cae18bbbc39486327f4d982d6ff02ec0b571ac2b6945c195
SHA512ef9c89ed4c86d2b899b7785ba1417b3d53053baea0947107e32e92433416b03fa7238ee6bf3b9f35701881143c7868b3e950d0d267e6ef52790ed1f2dfabc055