Resubmissions
18-04-2024 11:18
240418-ned1xsbd66 1018-04-2024 11:18
240418-nea92abd64 1018-04-2024 11:18
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240418-lz5chaba8t 7Analysis
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max time kernel
591s -
max time network
533s -
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
win7-20240220-en
Behavioral task
behavioral3
Sample
0145f04a8356780d52774ce5f7dd0a02f6d5b321694ed805ce3e27bdf04d3c94.exe
Resource
win10-20240319-en
Behavioral task
behavioral4
Sample
0145f04a8356780d52774ce5f7dd0a02f6d5b321694ed805ce3e27bdf04d3c94.exe
Resource
win10v2004-20240226-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\LocalState\ConstraintIndex\Input_{64a13e1a-d459-4138-a4c5-e9c5322df347}\_DECRYPT_INFO_lmzox.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\5UP89445\_DECRYPT_INFO_lmzox.html
http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd'>
http-equiv='Content-Type
Extracted
C:\Users\Public\Libraries\_DECRYPT_INFO_lmzox.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 (253) 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/1008-54-0x0000000003B00000-0x0000000003B08000-memory.dmp acprotect behavioral5/memory/1008-58-0x0000000003B00000-0x0000000003B08000-memory.dmp acprotect behavioral5/memory/1008-57-0x0000000003B00000-0x0000000003B08000-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 5972 vssadmin.exe -
Modifies registry class 1 IoCs
description ioc Process Key created \REGISTRY\USER\S-1-5-21-2516240262-2296879883-3965305654-1000_Classes\Local Settings 0145f04a8356780d52774ce5f7dd0a02f6d5b321694ed805ce3e27bdf04d3c94.exe -
Suspicious behavior: AddClipboardFormatListener 2 IoCs
pid Process 3704 WINWORD.EXE 3704 WINWORD.EXE -
Suspicious behavior: EnumeratesProcesses 2 IoCs
pid Process 1008 0145f04a8356780d52774ce5f7dd0a02f6d5b321694ed805ce3e27bdf04d3c94.exe 1008 0145f04a8356780d52774ce5f7dd0a02f6d5b321694ed805ce3e27bdf04d3c94.exe -
Suspicious use of AdjustPrivilegeToken 3 IoCs
description pid Process Token: SeBackupPrivilege 2332 vssvc.exe Token: SeRestorePrivilege 2332 vssvc.exe Token: SeAuditPrivilege 2332 vssvc.exe -
Suspicious use of SetWindowsHookEx 7 IoCs
pid Process 3704 WINWORD.EXE 3704 WINWORD.EXE 3704 WINWORD.EXE 3704 WINWORD.EXE 3704 WINWORD.EXE 3704 WINWORD.EXE 3704 WINWORD.EXE -
Suspicious use of WriteProcessMemory 4 IoCs
description pid Process procid_target PID 1008 wrote to memory of 3704 1008 0145f04a8356780d52774ce5f7dd0a02f6d5b321694ed805ce3e27bdf04d3c94.exe 81 PID 1008 wrote to memory of 3704 1008 0145f04a8356780d52774ce5f7dd0a02f6d5b321694ed805ce3e27bdf04d3c94.exe 81 PID 1008 wrote to memory of 5972 1008 0145f04a8356780d52774ce5f7dd0a02f6d5b321694ed805ce3e27bdf04d3c94.exe 86 PID 1008 wrote to memory of 5972 1008 0145f04a8356780d52774ce5f7dd0a02f6d5b321694ed805ce3e27bdf04d3c94.exe 86 -
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:1008 -
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:3704
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C:\Windows\SYSTEM32\vssadmin.exevssadmin.exe delete shadows /all /quiet2⤵
- Interacts with shadow copies
PID:5972
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C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2332
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
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C:\Users\Admin\AppData\Local\Packages\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\AC\INetCache\5UP89445\_DECRYPT_INFO_lmzox.html
Filesize12KB
MD57884942a024a3d2383ff371e530cf3a7
SHA11889d09e12d449305c34e8fc2f803715341fba1a
SHA256428f01d08ed3d2a0a64a70759e9649eeecfab3492ecc2bea8003d38934f513e0
SHA512378b9d97f4329cb4f8a16ad8018a82d9c135264bb9a59bf03ba1185d9d728eea81e22449664ac20f6b9ff2b935141ee881b47941c6b1a87e331a0a1bff2599ba
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C:\Users\Admin\AppData\Local\Packages\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\LocalState\ConstraintIndex\Input_{64a13e1a-d459-4138-a4c5-e9c5322df347}\_DECRYPT_INFO_lmzox.html
Filesize12KB
MD5b29c209fd377ececb1266eb1e4ad4575
SHA1dd953106288149dfb83085321e3d714c0487f683
SHA256634a15f5a80f71ab0f5ab37bd4ff0ddf3b195dd507fc0a2949b6d44e205169dc
SHA512bf55dc271f3f58830d7c71abbff74b29f6f4135efc31020c0ad54eac6804b350cd18ccd14270956f8db8ea98a5af83fc7f51fedd12c3541f64b62be38e0536e3
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C:\Users\Admin\AppData\Local\Temp\0145f04a8356780d52774ce5f7dd0a02f6d5b321694ed805ce3e27bdf04d3c94.rtf
Filesize4KB
MD52d5020c82de674b48cfd17cc20fcbba2
SHA14e317eaeebd839ee5f6eb3925a9fbee819c5349c
SHA256120becd55248f4a2ccbbc99ba9d3c2932223264a95cd72e9ae7568be61277e9a
SHA512ffbbdda009237d6825f6cd6f751a41f4f9d716186901ffdbeed56c2d1410245771decd07f591cf56cafdd4bbebd4e4c74f009ff15736d5321635e34ff17d0d8d
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Filesize
263KB
MD5ff0e07eff1333cdf9fc2523d323dd654
SHA177a1ae0dd8dbc3fee65dd6266f31e2a564d088a4
SHA2563f925e0cc1542f09de1f99060899eafb0042bb9682507c907173c392115a44b5
SHA512b4615f995fab87661c2dbe46625aa982215d7bde27cafae221dca76087fe76da4b4a381943436fcac1577cb3d260d0050b32b7b93e3eb07912494429f126bb3d
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Filesize
12KB
MD5cb45d892b9c45992e52b9da0aa90cdc1
SHA1697f3f45de21fdee83ef116221d6e79ea853e44a
SHA256f7db65096d8d2052e1d26f7b560ad296b467fc540fc5a519cd9be69765c166e3
SHA5127a19ecc29262ac99c52a852d6134003f0f308189ef65b03d10fb59c10fe938af7acc9191685a516506a67693550090b94eb5031b9eacc093b6884225ca0a13e6