Resubmissions
18-04-2024 11:18
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240418-lz5chaba8t 7Analysis
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max time kernel
1192s -
max time network
1173s -
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 11:18
Static task
static1
Behavioral task
behavioral1
Sample
0145f04a8356780d52774ce5f7dd0a02f6d5b321694ed805ce3e27bdf04d3c94.exe
Resource
win10-20240404-en
Behavioral task
behavioral2
Sample
0145f04a8356780d52774ce5f7dd0a02f6d5b321694ed805ce3e27bdf04d3c94.exe
Resource
win7-20240221-en
Behavioral task
behavioral3
Sample
0145f04a8356780d52774ce5f7dd0a02f6d5b321694ed805ce3e27bdf04d3c94.exe
Resource
win10-20240404-en
Behavioral task
behavioral4
Sample
0145f04a8356780d52774ce5f7dd0a02f6d5b321694ed805ce3e27bdf04d3c94.exe
Resource
win10v2004-20240412-en
Behavioral task
behavioral5
Sample
0145f04a8356780d52774ce5f7dd0a02f6d5b321694ed805ce3e27bdf04d3c94.exe
Resource
win11-20240412-en
General
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Target
0145f04a8356780d52774ce5f7dd0a02f6d5b321694ed805ce3e27bdf04d3c94.exe
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Size
371KB
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MD5
eafe645b56c3f5cb746fb5f8504f6035
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SHA1
f539987de9fe59bff20483ac7a124afafc27036b
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SHA256
0145f04a8356780d52774ce5f7dd0a02f6d5b321694ed805ce3e27bdf04d3c94
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SHA512
61af2cfa960a72b66d54d0ee121acb5c54d455b05eb85fb2d7df2958d3134d348c87a5aef2aa46319532407f7ebf01eaedfb8dd889bb0f67ce5edc067445e806
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SSDEEP
6144:hnzQnu/cmM1oSigOQT2F8U92Iu7DMVQZhWLv3RXdYX9ji+uhi2PsrhY:dzQnkM1oSiBGI8bxn5W6i+uo20tY
Malware Config
Extracted
C:\Users\Admin\AppData\Local\Packages\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\AC\INetCache\591ST5K6\_DECRYPT_INFO_vnlvyo.html
http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd'>
http-equiv='Content-Type
Extracted
C:\_DECRYPT_INFO_vnlvyo.html
http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd'>
http-equiv='Content-Type
Extracted
C:\ProgramData\Package Cache\{ef6b00ec-13e1-4c25-9064-b2f383cb8412}\_DECRYPT_INFO_vnlvyo.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 (234) 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/3012-50-0x0000000003B00000-0x0000000003B08000-memory.dmp acprotect behavioral5/memory/3012-54-0x0000000003B00000-0x0000000003B08000-memory.dmp acprotect behavioral5/memory/3012-53-0x0000000003B00000-0x0000000003B08000-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 3720 vssadmin.exe -
Modifies registry class 1 IoCs
description ioc Process Key created \REGISTRY\USER\S-1-5-21-1734202354-1504186683-2192872036-1000_Classes\Local Settings 0145f04a8356780d52774ce5f7dd0a02f6d5b321694ed805ce3e27bdf04d3c94.exe -
Suspicious behavior: AddClipboardFormatListener 2 IoCs
pid Process 4100 WINWORD.EXE 4100 WINWORD.EXE -
Suspicious behavior: EnumeratesProcesses 2 IoCs
pid Process 3012 0145f04a8356780d52774ce5f7dd0a02f6d5b321694ed805ce3e27bdf04d3c94.exe 3012 0145f04a8356780d52774ce5f7dd0a02f6d5b321694ed805ce3e27bdf04d3c94.exe -
Suspicious use of AdjustPrivilegeToken 3 IoCs
description pid Process Token: SeBackupPrivilege 880 vssvc.exe Token: SeRestorePrivilege 880 vssvc.exe Token: SeAuditPrivilege 880 vssvc.exe -
Suspicious use of SetWindowsHookEx 7 IoCs
pid Process 4100 WINWORD.EXE 4100 WINWORD.EXE 4100 WINWORD.EXE 4100 WINWORD.EXE 4100 WINWORD.EXE 4100 WINWORD.EXE 4100 WINWORD.EXE -
Suspicious use of WriteProcessMemory 4 IoCs
description pid Process procid_target PID 3012 wrote to memory of 4100 3012 0145f04a8356780d52774ce5f7dd0a02f6d5b321694ed805ce3e27bdf04d3c94.exe 81 PID 3012 wrote to memory of 4100 3012 0145f04a8356780d52774ce5f7dd0a02f6d5b321694ed805ce3e27bdf04d3c94.exe 81 PID 3012 wrote to memory of 3720 3012 0145f04a8356780d52774ce5f7dd0a02f6d5b321694ed805ce3e27bdf04d3c94.exe 94 PID 3012 wrote to memory of 3720 3012 0145f04a8356780d52774ce5f7dd0a02f6d5b321694ed805ce3e27bdf04d3c94.exe 94 -
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\0145f04a8356780d52774ce5f7dd0a02f6d5b321694ed805ce3e27bdf04d3c94.exe"C:\Users\Admin\AppData\Local\Temp\0145f04a8356780d52774ce5f7dd0a02f6d5b321694ed805ce3e27bdf04d3c94.exe"1⤵
- Modifies registry class
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:3012 -
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\0145f04a8356780d52774ce5f7dd0a02f6d5b321694ed805ce3e27bdf04d3c94.rtf" /o ""2⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
PID:4100
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C:\Windows\SYSTEM32\vssadmin.exevssadmin.exe delete shadows /all /quiet2⤵
- Interacts with shadow copies
PID:3720
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C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Suspicious use of AdjustPrivilegeToken
PID:880
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
12KB
MD5ac1ec1f3037332ba7730568c32d8b6b4
SHA189c449e9b5218796b187ea85e5375938cb1782fa
SHA25648eb2b99a63c818bf735a87dd9e4fc7ecbfaf45263181cee66d67929dde17db2
SHA5126adb8d410867bbd1b5fdf5ad8873244e86daf53d37800432d64f8d7238a5ccdfaaaff3f8eb01a0c3b7e17b43a592d0413ab9e9e703fe94d3bd22fdceb41889a2
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C:\Users\Admin\AppData\Local\Packages\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\AC\INetCache\591ST5K6\_DECRYPT_INFO_vnlvyo.html
Filesize12KB
MD5c429d81363a4c1d9b8980cf776aee7fe
SHA1eb689ac5f41ea85229c59332872af9048b02e8d1
SHA2560a3302f235fb7e1c27f6b06953442ebb8f7a2ffb3e288cc2ffc19065c1b90d7c
SHA512e75a1ddd24d96e75f97a5e2474b471da4d353e2b0b6f9ae8649c28d72bed898d3da8fda0c768f20b937aab0da20866d63181e9c7ad741e4be952fbcc308984f1
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C:\Users\Admin\AppData\Local\Temp\0145f04a8356780d52774ce5f7dd0a02f6d5b321694ed805ce3e27bdf04d3c94.rtf
Filesize4KB
MD52d5020c82de674b48cfd17cc20fcbba2
SHA14e317eaeebd839ee5f6eb3925a9fbee819c5349c
SHA256120becd55248f4a2ccbbc99ba9d3c2932223264a95cd72e9ae7568be61277e9a
SHA512ffbbdda009237d6825f6cd6f751a41f4f9d716186901ffdbeed56c2d1410245771decd07f591cf56cafdd4bbebd4e4c74f009ff15736d5321635e34ff17d0d8d
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Filesize
245KB
MD5f883b260a8d67082ea895c14bf56dd56
SHA17954565c1f243d46ad3b1e2f1baf3281451fc14b
SHA256ef4835db41a485b56c2ef0ff7094bc2350460573a686182bc45fd6613480e353
SHA512d95924a499f32d9b4d9a7d298502181f9e9048c21dbe0496fa3c3279b263d6f7d594b859111a99b1a53bd248ee69b867d7b1768c42e1e40934e0b990f0ce051e
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Filesize
12KB
MD5d7a35cf3650cbb4ad318efc5b4bac864
SHA12105e81b5636b14879dc6298c6e52ffbaa1b9b32
SHA256c9eb66db37bb6db1739ebda8aa9aa40b4f312c8515f0095bad39aaa786116195
SHA512858996d3cb01d6076bee3e6776e28d14a0a0068bf905ad2e80f5a2840b96668ce4e1096d17413e4dffd6d2f700e2bfa0b494f66b75ac762aa6f7eea8689b6cd2