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240418-f2b6vade7x 7Analysis
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max time kernel
1791s -
max time network
1608s -
platform
windows10-1703_x64 -
resource
win10-20240404-en -
resource tags
arch:x64arch:x86image:win10-20240404-enlocale:en-usos:windows10-1703-x64system -
submitted
14-04-2024 14:20
Static task
static1
Behavioral task
behavioral1
Sample
d351ac17dc0d9476ef029484a165f99e258f546bba2d619b1c6485cb8875ac7a.exe
Resource
win7-20240215-en
Behavioral task
behavioral2
Sample
d351ac17dc0d9476ef029484a165f99e258f546bba2d619b1c6485cb8875ac7a.exe
Resource
win10-20240404-en
Behavioral task
behavioral3
Sample
d351ac17dc0d9476ef029484a165f99e258f546bba2d619b1c6485cb8875ac7a.exe
Resource
win10v2004-20240226-en
Behavioral task
behavioral4
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\Desktop\_DECRYPT_INFO_ibwdsh.html
http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd'>
http-equiv='Content-Type
Extracted
C:\Users\Admin\AppData\Local\Packages\Microsoft.Windows.Cortana_cw5n1h2txyewy\LocalState\ConstraintIndex\Apps_{51f730f1-be6f-439b-a6b7-1e29a5645057}\_DECRYPT_INFO_ibwdsh.html
http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd'>
http-equiv='Content-Type
Extracted
C:\Users\Public\Libraries\_DECRYPT_INFO_ibwdsh.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 (198) 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 behavioral2/memory/2856-218-0x0000000003990000-0x0000000003998000-memory.dmp acprotect behavioral2/memory/2856-217-0x0000000003990000-0x0000000003998000-memory.dmp acprotect behavioral2/memory/2856-214-0x0000000003990000-0x0000000003998000-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 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 1984 vssadmin.exe -
Modifies registry class 1 IoCs
description ioc Process Key created \REGISTRY\USER\S-1-5-21-1687926120-3022217735-1146543763-1000_Classes\Local Settings d351ac17dc0d9476ef029484a165f99e258f546bba2d619b1c6485cb8875ac7a.exe -
Suspicious behavior: AddClipboardFormatListener 2 IoCs
pid Process 4732 WINWORD.EXE 4732 WINWORD.EXE -
Suspicious behavior: EnumeratesProcesses 2 IoCs
pid Process 2856 d351ac17dc0d9476ef029484a165f99e258f546bba2d619b1c6485cb8875ac7a.exe 2856 d351ac17dc0d9476ef029484a165f99e258f546bba2d619b1c6485cb8875ac7a.exe -
Suspicious use of AdjustPrivilegeToken 3 IoCs
description pid Process Token: SeBackupPrivilege 684 vssvc.exe Token: SeRestorePrivilege 684 vssvc.exe Token: SeAuditPrivilege 684 vssvc.exe -
Suspicious use of SetWindowsHookEx 7 IoCs
pid Process 4732 WINWORD.EXE 4732 WINWORD.EXE 4732 WINWORD.EXE 4732 WINWORD.EXE 4732 WINWORD.EXE 4732 WINWORD.EXE 4732 WINWORD.EXE -
Suspicious use of WriteProcessMemory 4 IoCs
description pid Process procid_target PID 2856 wrote to memory of 4732 2856 d351ac17dc0d9476ef029484a165f99e258f546bba2d619b1c6485cb8875ac7a.exe 73 PID 2856 wrote to memory of 4732 2856 d351ac17dc0d9476ef029484a165f99e258f546bba2d619b1c6485cb8875ac7a.exe 73 PID 2856 wrote to memory of 1984 2856 d351ac17dc0d9476ef029484a165f99e258f546bba2d619b1c6485cb8875ac7a.exe 77 PID 2856 wrote to memory of 1984 2856 d351ac17dc0d9476ef029484a165f99e258f546bba2d619b1c6485cb8875ac7a.exe 77 -
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:2856 -
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:4732
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C:\Windows\SYSTEM32\vssadmin.exevssadmin.exe delete shadows /all /quiet2⤵
- Interacts with shadow copies
PID:1984
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C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Suspicious use of AdjustPrivilegeToken
PID:684
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
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C:\Users\Admin\AppData\Local\Packages\Microsoft.Windows.Cortana_cw5n1h2txyewy\LocalState\ConstraintIndex\Apps_{51f730f1-be6f-439b-a6b7-1e29a5645057}\_DECRYPT_INFO_ibwdsh.html
Filesize12KB
MD56fb0e169b3546c306f76eff2df6ea8db
SHA195f5c0cdd7237dae0f68661943bb5e5170878504
SHA256362056773cf285bd6c327c31ed973e50dc038daf43d06763ae5dfb774fc2e3f1
SHA51279f42c3af383a5ab076bc715e630a5678cf28a98e3ed83786dafc51434555bb5b070fc2f126a5883f9c2a59690ebe846dd6a461c4b3a936704a41fcefad9103a
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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
MD58a036beb0e31c554118c85756709e245
SHA12666ee7b73f18ccdd71a7c8dd4e567511e06a5e2
SHA256bdf6c1620bd6776dd398381f8796e25b0bd763312400c6419acdb5b6de66deb3
SHA512a89d71d8edf28e431314c8ed3d810a964b557018527a33fcf6a226f386352b7e6b834ec0e9df647cd62d91c8dc2bc4c1a84f3aa2540c612f766268714e0db676
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Filesize
12KB
MD54cd0b36b1d37d63f867a0012fa26c5d8
SHA12e0f3669610d843480fd40c84b495fbc32e87508
SHA2563c5b2ff3083b7ac703952136fa10cef5acfa2e5b0288d58b5a2a1fe2a4719e7b
SHA512fff5880d8802e2daaa47c07be55a6ff8426d8ed8e14d0a79f5dc63ffcac1a093fc103a97f6a570b906c7d4fa1d6c6fb9066c528bec1277ddb323ec26ea0cd83e