Analysis
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max time kernel
142s -
max time network
147s -
platform
windows10-2004_x64 -
resource
win10v2004-20231222-en -
resource tags
arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-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 16 IoCs
resource yara_rule behavioral2/memory/4488-11-0x0000000000400000-0x0000000000452000-memory.dmp modiloader_stage2 behavioral2/memory/1692-28-0x0000000000400000-0x0000000000452000-memory.dmp modiloader_stage2 behavioral2/memory/1692-31-0x0000000000400000-0x0000000000452000-memory.dmp modiloader_stage2 behavioral2/memory/1692-32-0x0000000000400000-0x0000000000452000-memory.dmp modiloader_stage2 behavioral2/memory/1692-35-0x0000000000400000-0x0000000000452000-memory.dmp modiloader_stage2 behavioral2/memory/1692-38-0x0000000000400000-0x0000000000452000-memory.dmp modiloader_stage2 behavioral2/memory/1692-41-0x0000000000400000-0x0000000000452000-memory.dmp modiloader_stage2 behavioral2/memory/1692-44-0x0000000000400000-0x0000000000452000-memory.dmp modiloader_stage2 behavioral2/memory/1692-47-0x0000000000400000-0x0000000000452000-memory.dmp modiloader_stage2 behavioral2/memory/1692-50-0x0000000000400000-0x0000000000452000-memory.dmp modiloader_stage2 behavioral2/memory/1692-53-0x0000000000400000-0x0000000000452000-memory.dmp modiloader_stage2 behavioral2/memory/1692-56-0x0000000000400000-0x0000000000452000-memory.dmp modiloader_stage2 behavioral2/memory/1692-59-0x0000000000400000-0x0000000000452000-memory.dmp modiloader_stage2 behavioral2/memory/1692-62-0x0000000000400000-0x0000000000452000-memory.dmp modiloader_stage2 behavioral2/memory/1692-65-0x0000000000400000-0x0000000000452000-memory.dmp modiloader_stage2 behavioral2/memory/1692-68-0x0000000000400000-0x0000000000452000-memory.dmp modiloader_stage2 -
Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
description ioc Process Key value queried \REGISTRY\USER\S-1-5-21-1168293393-3419776239-306423207-1000\Control Panel\International\Geo\Nation 8c8a12ad071e2916f1601a12879c14dd.exe -
Deletes itself 1 IoCs
pid Process 1692 mstwain32.exe -
Executes dropped EXE 1 IoCs
pid Process 1692 mstwain32.exe -
Loads dropped DLL 4 IoCs
pid Process 1692 mstwain32.exe 1692 mstwain32.exe 1692 mstwain32.exe 1692 mstwain32.exe -
resource yara_rule behavioral2/memory/4488-0-0x0000000000400000-0x0000000000452000-memory.dmp upx behavioral2/files/0x000a00000001e4e5-6.dat upx behavioral2/memory/4488-11-0x0000000000400000-0x0000000000452000-memory.dmp upx behavioral2/memory/1692-28-0x0000000000400000-0x0000000000452000-memory.dmp upx behavioral2/memory/1692-31-0x0000000000400000-0x0000000000452000-memory.dmp upx behavioral2/memory/1692-32-0x0000000000400000-0x0000000000452000-memory.dmp upx behavioral2/memory/1692-35-0x0000000000400000-0x0000000000452000-memory.dmp upx behavioral2/memory/1692-38-0x0000000000400000-0x0000000000452000-memory.dmp upx behavioral2/memory/1692-41-0x0000000000400000-0x0000000000452000-memory.dmp upx behavioral2/memory/1692-44-0x0000000000400000-0x0000000000452000-memory.dmp upx behavioral2/memory/1692-47-0x0000000000400000-0x0000000000452000-memory.dmp upx behavioral2/memory/1692-50-0x0000000000400000-0x0000000000452000-memory.dmp upx behavioral2/memory/1692-53-0x0000000000400000-0x0000000000452000-memory.dmp upx behavioral2/memory/1692-56-0x0000000000400000-0x0000000000452000-memory.dmp upx behavioral2/memory/1692-59-0x0000000000400000-0x0000000000452000-memory.dmp upx behavioral2/memory/1692-62-0x0000000000400000-0x0000000000452000-memory.dmp upx behavioral2/memory/1692-65-0x0000000000400000-0x0000000000452000-memory.dmp upx behavioral2/memory/1692-68-0x0000000000400000-0x0000000000452000-memory.dmp upx -
Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-1168293393-3419776239-306423207-1000\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\mstwain32.exe 8c8a12ad071e2916f1601a12879c14dd.exe File opened for modification C:\Windows\mstwain32.exe 8c8a12ad071e2916f1601a12879c14dd.exe File created C:\Windows\ntdtcstp.dll mstwain32.exe File created C:\Windows\cmsetac.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 4488 8c8a12ad071e2916f1601a12879c14dd.exe Token: SeBackupPrivilege 4896 vssvc.exe Token: SeRestorePrivilege 4896 vssvc.exe Token: SeAuditPrivilege 4896 vssvc.exe Token: SeDebugPrivilege 1692 mstwain32.exe Token: SeDebugPrivilege 1692 mstwain32.exe -
Suspicious use of SetWindowsHookEx 2 IoCs
pid Process 1692 mstwain32.exe 1692 mstwain32.exe -
Suspicious use of WriteProcessMemory 3 IoCs
description pid Process procid_target PID 4488 wrote to memory of 1692 4488 8c8a12ad071e2916f1601a12879c14dd.exe 91 PID 4488 wrote to memory of 1692 4488 8c8a12ad071e2916f1601a12879c14dd.exe 91 PID 4488 wrote to memory of 1692 4488 8c8a12ad071e2916f1601a12879c14dd.exe 91 -
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 computer location settings
- Checks whether UAC is enabled
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4488 -
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
- Loads dropped DLL
- 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:1692
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C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Suspicious use of AdjustPrivilegeToken
PID:4896
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
Loading Replay Monitor...
Downloads
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Filesize
32KB
MD5c200deb575126b97609d020897aaa5ac
SHA19d086f32f5e6a134c5a9dffe35d29c2a3261a42f
SHA256a4a0c6545cd3990fcfb973ff5b76517520edf142d9f09fbcb118c92574ed2762
SHA512c8040e3997967d4c25401b53b9fb97545709829876031cdd985c46cf0cccb467a546c8563441b2fbe2e03de0c9829732a345eb629e2eb2eecb87026794e4b7d7
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Filesize
115KB
MD58c8a12ad071e2916f1601a12879c14dd
SHA133c46d051870a085f7731626fc327975134a1559
SHA256f71318cf8ed1b720cae18bbbc39486327f4d982d6ff02ec0b571ac2b6945c195
SHA512ef9c89ed4c86d2b899b7785ba1417b3d53053baea0947107e32e92433416b03fa7238ee6bf3b9f35701881143c7868b3e950d0d267e6ef52790ed1f2dfabc055
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Filesize
7KB
MD567587e25a971a141628d7f07bd40ffa0
SHA176fcd014539a3bb247cc0b761225f68bd6055f6b
SHA256e6829866322d68d5c5b78e3d48dcec70a41cdc42c6f357a44fd329f74a8b4378
SHA5126e6de7aa02c48f8b96b06e5f1160fbc5c95312320636e138cc997ef3362a61bc50ec03db1f06292eb964cd71915ddb2ec2eb741432c7da44215a4acbb576a350