Resubmissions
18/04/2024, 05:22
240418-f2z8nscc74 1018/04/2024, 05:22
240418-f2njwade8w 1018/04/2024, 05:21
240418-f2gfkade8s 718/04/2024, 05:21
240418-f2csdacc53 1018/04/2024, 05:21
240418-f2b6vade7x 7Analysis
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max time kernel
597s -
max time network
580s -
platform
windows11-21h2_x64 -
resource
win11-20240412-en -
resource tags
arch:x64arch:x86image:win11-20240412-enlocale:en-usos:windows11-21h2-x64system -
submitted
18/04/2024, 05:21
Static task
static1
Behavioral task
behavioral1
Sample
d351ac17dc0d9476ef029484a165f99e258f546bba2d619b1c6485cb8875ac7a.exe
Resource
win10v2004-20240412-en
Behavioral task
behavioral2
Sample
d351ac17dc0d9476ef029484a165f99e258f546bba2d619b1c6485cb8875ac7a.exe
Resource
win7-20231129-en
Behavioral task
behavioral3
Sample
d351ac17dc0d9476ef029484a165f99e258f546bba2d619b1c6485cb8875ac7a.exe
Resource
win10-20240404-en
Behavioral task
behavioral4
Sample
d351ac17dc0d9476ef029484a165f99e258f546bba2d619b1c6485cb8875ac7a.exe
Resource
win10v2004-20240412-en
Behavioral task
behavioral5
Sample
d351ac17dc0d9476ef029484a165f99e258f546bba2d619b1c6485cb8875ac7a.exe
Resource
win11-20240412-en
General
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Target
d351ac17dc0d9476ef029484a165f99e258f546bba2d619b1c6485cb8875ac7a.exe
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Size
371KB
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MD5
bb8cd5df2be7e8bcc5be439675b3d0a2
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SHA1
627ac60f64974d5caaf81c2de8ca0977c91f4219
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SHA256
d351ac17dc0d9476ef029484a165f99e258f546bba2d619b1c6485cb8875ac7a
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SHA512
57031eb7d7b2c27d7ecacdc085d07065ced46a742128f9818f62c9fe6633c31aa8eb20ffc52c8415613787946060f5a6b5adf8b977d5ca4fed9656233ebd9cfa
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SSDEEP
6144:tnzQnu/cmM1oSigOQT2F8U92Iu7DMVQZhWLvLRXdYX9ji+uhi2PsrhY:hzQnkM1oSiBGI8bxn5m6i+uo20tY
Malware Config
Extracted
C:\Users\Admin\AppData\Local\Packages\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\LocalState\ConstraintIndex\Apps_{92f9bbfc-48a4-4c1c-8d68-96ef76afc019}\_DECRYPT_INFO_kvxq.html
http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd'>
http-equiv='Content-Type
Extracted
C:\Users\Admin\AppData\Local\Packages\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\AC\INetCache\AH2ZB90A\_DECRYPT_INFO_kvxq.html
http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd'>
http-equiv='Content-Type
Extracted
C:\ProgramData\Package Cache\{4d8dcf8c-a72a-43e1-9833-c12724db736e}\_DECRYPT_INFO_kvxq.html
http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd'>
http-equiv='Content-Type
Signatures
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Maktub Locker
Advanced ransomware family capable of offline decryption, generally distributed via .scr email attachments.
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Deletes shadow copies 2 TTPs
Ransomware often targets backup files to inhibit system recovery.
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Renames multiple (238) files with added filename extension
This suggests ransomware activity of encrypting all the files on the system.
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ACProtect 1.3x - 1.4x DLL software 3 IoCs
Detects file using ACProtect software.
resource yara_rule behavioral5/memory/2632-52-0x0000000003AF0000-0x0000000003AF8000-memory.dmp acprotect behavioral5/memory/2632-55-0x0000000003AF0000-0x0000000003AF8000-memory.dmp acprotect behavioral5/memory/2632-56-0x0000000003AF0000-0x0000000003AF8000-memory.dmp acprotect -
Uses Tor communications 1 TTPs
Malware can proxy its traffic through Tor for more anonymity.
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Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Checks processor information in registry 2 TTPs 3 IoCs
Processor information is often read in order to detect sandboxing environments.
description ioc Process Key opened \REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0 WINWORD.EXE Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz WINWORD.EXE Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString WINWORD.EXE -
Enumerates system info in registry 2 TTPs 3 IoCs
description ioc Process Key opened \REGISTRY\MACHINE\Hardware\Description\System\BIOS WINWORD.EXE Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemFamily WINWORD.EXE Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU WINWORD.EXE -
Interacts with shadow copies 2 TTPs 1 IoCs
Shadow copies are often targeted by ransomware to inhibit system recovery.
pid Process 4576 vssadmin.exe -
Modifies registry class 1 IoCs
description ioc Process Key created \REGISTRY\USER\S-1-5-21-825860316-2493133627-3905166409-1000_Classes\Local Settings d351ac17dc0d9476ef029484a165f99e258f546bba2d619b1c6485cb8875ac7a.exe -
Suspicious behavior: AddClipboardFormatListener 2 IoCs
pid Process 2748 WINWORD.EXE 2748 WINWORD.EXE -
Suspicious behavior: EnumeratesProcesses 2 IoCs
pid Process 2632 d351ac17dc0d9476ef029484a165f99e258f546bba2d619b1c6485cb8875ac7a.exe 2632 d351ac17dc0d9476ef029484a165f99e258f546bba2d619b1c6485cb8875ac7a.exe -
Suspicious use of AdjustPrivilegeToken 3 IoCs
description pid Process Token: SeBackupPrivilege 4320 vssvc.exe Token: SeRestorePrivilege 4320 vssvc.exe Token: SeAuditPrivilege 4320 vssvc.exe -
Suspicious use of SetWindowsHookEx 7 IoCs
pid Process 2748 WINWORD.EXE 2748 WINWORD.EXE 2748 WINWORD.EXE 2748 WINWORD.EXE 2748 WINWORD.EXE 2748 WINWORD.EXE 2748 WINWORD.EXE -
Suspicious use of WriteProcessMemory 4 IoCs
description pid Process procid_target PID 2632 wrote to memory of 2748 2632 d351ac17dc0d9476ef029484a165f99e258f546bba2d619b1c6485cb8875ac7a.exe 80 PID 2632 wrote to memory of 2748 2632 d351ac17dc0d9476ef029484a165f99e258f546bba2d619b1c6485cb8875ac7a.exe 80 PID 2632 wrote to memory of 4576 2632 d351ac17dc0d9476ef029484a165f99e258f546bba2d619b1c6485cb8875ac7a.exe 85 PID 2632 wrote to memory of 4576 2632 d351ac17dc0d9476ef029484a165f99e258f546bba2d619b1c6485cb8875ac7a.exe 85 -
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\d351ac17dc0d9476ef029484a165f99e258f546bba2d619b1c6485cb8875ac7a.exe"C:\Users\Admin\AppData\Local\Temp\d351ac17dc0d9476ef029484a165f99e258f546bba2d619b1c6485cb8875ac7a.exe"1⤵
- Modifies registry class
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:2632 -
C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE"C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE" /n "C:\Users\Admin\AppData\Local\Temp\d351ac17dc0d9476ef029484a165f99e258f546bba2d619b1c6485cb8875ac7a.rtf" /o ""2⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
PID:2748
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C:\Windows\SYSTEM32\vssadmin.exevssadmin.exe delete shadows /all /quiet2⤵
- Interacts with shadow copies
PID:4576
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C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Suspicious use of AdjustPrivilegeToken
PID:4320
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
12KB
MD5ad14f56e8c398a192907d3894485bd13
SHA18814f64f0a0f76cd3a2c79b4fe21e0f1cd241bfd
SHA2568d58ee388fbdcc048b330f01a8393d09e0ad996583a78c70494bf306d1e21d77
SHA512df28b058af5ac8dc8fdf813088e6dc4a21c86bf045f043f621848b312887203aab91d1ff2e1d6eff2a9e65acc348e5d802e942154692e0acef28873a793023c2
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C:\Users\Admin\AppData\Local\Packages\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\AC\INetCache\AH2ZB90A\_DECRYPT_INFO_kvxq.html
Filesize12KB
MD50d5bd9326e8258bc898bd2714d143f00
SHA112d57945149753390fff246a7fee7fab97b52520
SHA25690f01d895082dde869a4e28c1eb3b30d26660bfd763ed8086173fe51eeeaaf13
SHA5121859b6d51eaf26cbf65fa6e985bb1a5255af087477b2e4cecef19230a96b503dd70739f95082f8ad3af0488c3ac089bd4513ee87aab545bc8e886d091046f198
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C:\Users\Admin\AppData\Local\Packages\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\LocalState\ConstraintIndex\Apps_{92f9bbfc-48a4-4c1c-8d68-96ef76afc019}\_DECRYPT_INFO_kvxq.html
Filesize12KB
MD5ca91c50ab23edebdd53810700a158f6f
SHA1abf0f1517dfd9181feea435ad175f10dd3977579
SHA256a4bb34434c496f1d0e74d21df51771bef6ec39a5f166f6b71a87ea50537d2d24
SHA51228f5290ff3ef94e7219e7b7baa9496a20da89defdc3b1be44c8fff4dd175a2cafccd6d49a61a954b4d179a3c4056367ca324cb51ad3f46c57aee2c5ba403eacc
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Filesize
245KB
MD5f883b260a8d67082ea895c14bf56dd56
SHA17954565c1f243d46ad3b1e2f1baf3281451fc14b
SHA256ef4835db41a485b56c2ef0ff7094bc2350460573a686182bc45fd6613480e353
SHA512d95924a499f32d9b4d9a7d298502181f9e9048c21dbe0496fa3c3279b263d6f7d594b859111a99b1a53bd248ee69b867d7b1768c42e1e40934e0b990f0ce051e
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C:\Users\Admin\AppData\Local\Temp\d351ac17dc0d9476ef029484a165f99e258f546bba2d619b1c6485cb8875ac7a.rtf
Filesize4KB
MD52d5020c82de674b48cfd17cc20fcbba2
SHA14e317eaeebd839ee5f6eb3925a9fbee819c5349c
SHA256120becd55248f4a2ccbbc99ba9d3c2932223264a95cd72e9ae7568be61277e9a
SHA512ffbbdda009237d6825f6cd6f751a41f4f9d716186901ffdbeed56c2d1410245771decd07f591cf56cafdd4bbebd4e4c74f009ff15736d5321635e34ff17d0d8d