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
596s -
max time network
593s -
platform
windows10-2004_x64 -
resource
win10v2004-20240412-en -
resource tags
arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-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\Microsoft.Windows.Search_cw5n1h2txyewy\LocalState\ConstraintIndex\Apps_{ed5c402f-e6e6-423c-8767-57851582cb09}\_DECRYPT_INFO_zwrbz.html
http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd'>
http-equiv='Content-Type
Extracted
C:\_DECRYPT_INFO_zwrbz.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_zwrbz.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 (252) 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 behavioral4/memory/3568-53-0x0000000003A60000-0x0000000003A68000-memory.dmp acprotect behavioral4/memory/3568-57-0x0000000003A60000-0x0000000003A68000-memory.dmp acprotect behavioral4/memory/3568-56-0x0000000003A60000-0x0000000003A68000-memory.dmp acprotect -
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-1-5-21-1826666146-2574340311-1877551059-1000\Control Panel\International\Geo\Nation d351ac17dc0d9476ef029484a165f99e258f546bba2d619b1c6485cb8875ac7a.exe -
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 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 Key opened \REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0 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 920 vssadmin.exe -
Modifies registry class 1 IoCs
description ioc Process Key created \REGISTRY\USER\S-1-5-21-1826666146-2574340311-1877551059-1000_Classes\Local Settings d351ac17dc0d9476ef029484a165f99e258f546bba2d619b1c6485cb8875ac7a.exe -
Suspicious behavior: AddClipboardFormatListener 2 IoCs
pid Process 3524 WINWORD.EXE 3524 WINWORD.EXE -
Suspicious behavior: EnumeratesProcesses 2 IoCs
pid Process 3568 d351ac17dc0d9476ef029484a165f99e258f546bba2d619b1c6485cb8875ac7a.exe 3568 d351ac17dc0d9476ef029484a165f99e258f546bba2d619b1c6485cb8875ac7a.exe -
Suspicious use of AdjustPrivilegeToken 3 IoCs
description pid Process Token: SeBackupPrivilege 3280 vssvc.exe Token: SeRestorePrivilege 3280 vssvc.exe Token: SeAuditPrivilege 3280 vssvc.exe -
Suspicious use of SetWindowsHookEx 7 IoCs
pid Process 3524 WINWORD.EXE 3524 WINWORD.EXE 3524 WINWORD.EXE 3524 WINWORD.EXE 3524 WINWORD.EXE 3524 WINWORD.EXE 3524 WINWORD.EXE -
Suspicious use of WriteProcessMemory 4 IoCs
description pid Process procid_target PID 3568 wrote to memory of 3524 3568 d351ac17dc0d9476ef029484a165f99e258f546bba2d619b1c6485cb8875ac7a.exe 92 PID 3568 wrote to memory of 3524 3568 d351ac17dc0d9476ef029484a165f99e258f546bba2d619b1c6485cb8875ac7a.exe 92 PID 3568 wrote to memory of 920 3568 d351ac17dc0d9476ef029484a165f99e258f546bba2d619b1c6485cb8875ac7a.exe 101 PID 3568 wrote to memory of 920 3568 d351ac17dc0d9476ef029484a165f99e258f546bba2d619b1c6485cb8875ac7a.exe 101 -
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⤵
- Checks computer location settings
- Modifies registry class
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:3568 -
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:3524
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C:\Windows\SYSTEM32\vssadmin.exevssadmin.exe delete shadows /all /quiet2⤵
- Interacts with shadow copies
PID:920
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C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Suspicious use of AdjustPrivilegeToken
PID:3280
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
12KB
MD5fbd3e1db9a4991b1e1e004dbc39f57c1
SHA1866a25f58a4101e89772364c16f9f30879a2c717
SHA256e37007f1749a486507d79f429868f6044f9d8e4998e81a82f87b214b6447566a
SHA512dfc30655f544053b0f8f5929726f92dad3cea46fb8eb1e552d64076f58f697359b3dc51e460e8eb0467eb8ebe87ad1869ca22fdd0380984390a03ac6811b5b1a
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C:\Users\Admin\AppData\Local\Packages\Microsoft.Windows.Search_cw5n1h2txyewy\LocalState\ConstraintIndex\Apps_{ce3a677c-419c-48b6-ac37-61dcbedac19a}\0.2.filtertrie.intermediate.txt.zwrbz
Filesize48B
MD52dfac05456bd7db24546429359636917
SHA1882f4211e2b5d9ca8367b412fa4da1b694a76c49
SHA2564defe6f63f83e82bb605f1887f88748d950eebd65b765c5dfb9a5f426ab7d1c9
SHA5123d9739d5f2ec2ef56f0bcda724f238e139b7e03aaea925b010066b0df6ab944adf67c0fad0538eac800b139dbf224088c76ff0ebb8c3c7cf971e1f65fea14c76
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C:\Users\Admin\AppData\Local\Packages\Microsoft.Windows.Search_cw5n1h2txyewy\LocalState\ConstraintIndex\Apps_{e69b9f0a-3aee-41e9-937f-47f102977943}\0.1.filtertrie.intermediate.txt.zwrbz
Filesize48B
MD55e9a89ad7358607daac4423de448bc5e
SHA1476811a5aa0527f4aeb206c3d436dbc320d71885
SHA25698c027e1ad6717fc3044c4c321d0a156a7c285c02cefcfc3aad6eb7dc6d38940
SHA5121443c8d764d0237532b7e35d7b845a10d7fec2c339a5f756cfa4e8b673b3d44979eb4cb224dfcd28b0520acfbe059a2a14992d8c8e1eb7418d945152d3502964
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C:\Users\Admin\AppData\Local\Packages\Microsoft.Windows.Search_cw5n1h2txyewy\LocalState\ConstraintIndex\Apps_{ed5c402f-e6e6-423c-8767-57851582cb09}\_DECRYPT_INFO_zwrbz.html
Filesize12KB
MD5f21a341c72078b765384092fc2747f1f
SHA128204baabe879ab5a3f1e5c321facaa9b42baf1e
SHA25687a06dee44d5dbbe390d5be6c41d30b02c684395c02f85fa3a28c08a34d7c4c3
SHA51208d0b66512699a569ec7fb01e67303f6b2ab34a9055063e32b667380fcdfb811353a96e20b7ce313e725bcf6e8544d13115481be4876c407b8b34b3f2492950f
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Filesize
262KB
MD551d32ee5bc7ab811041f799652d26e04
SHA1412193006aa3ef19e0a57e16acf86b830993024a
SHA2566230814bf5b2d554397580613e20681752240ab87fd354ececf188c1eabe0e97
SHA5125fc5d889b0c8e5ef464b76f0c4c9e61bda59b2d1205ac9417cc74d6e9f989fb73d78b4eb3044a1a1e1f2c00ce1ca1bd6d4d07eeadc4108c7b124867711c31810
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C:\Users\Admin\AppData\Local\Temp\d351ac17dc0d9476ef029484a165f99e258f546bba2d619b1c6485cb8875ac7a.rtf
Filesize4KB
MD52d5020c82de674b48cfd17cc20fcbba2
SHA14e317eaeebd839ee5f6eb3925a9fbee819c5349c
SHA256120becd55248f4a2ccbbc99ba9d3c2932223264a95cd72e9ae7568be61277e9a
SHA512ffbbdda009237d6825f6cd6f751a41f4f9d716186901ffdbeed56c2d1410245771decd07f591cf56cafdd4bbebd4e4c74f009ff15736d5321635e34ff17d0d8d
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Filesize
12KB
MD53c8b89031ba5f816b3086ca685e71641
SHA1b387d3302ca5755926b7386748c6c9ad8c14568a
SHA2569155daa4840f4cdf19474c691a256b6b19d823d78e3ff7888ed6f0ee0968a5b6
SHA512a9b03b483b8f3b9a69ff3bb35e444cd94c981b316c4a4bad9a81e61e59ecff9ab15566aa391bd9816e07ecddee7bc20fe2371a232f5bad9e4aa04361679b3e00