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
-
max time kernel
1792s -
max time network
1599s -
platform
windows10-1703_x64 -
resource
win10-20240404-en -
resource tags
arch:x64arch:x86image:win10-20240404-enlocale:en-usos:windows10-1703-x64system -
submitted
18/04/2024, 05:22
Static task
static1
Behavioral task
behavioral1
Sample
d351ac17dc0d9476ef029484a165f99e258f546bba2d619b1c6485cb8875ac7a.exe
Resource
win10-20240404-en
Behavioral task
behavioral2
Sample
d351ac17dc0d9476ef029484a165f99e258f546bba2d619b1c6485cb8875ac7a.exe
Resource
win7-20240221-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
-
Target
d351ac17dc0d9476ef029484a165f99e258f546bba2d619b1c6485cb8875ac7a.exe
-
Size
371KB
-
MD5
bb8cd5df2be7e8bcc5be439675b3d0a2
-
SHA1
627ac60f64974d5caaf81c2de8ca0977c91f4219
-
SHA256
d351ac17dc0d9476ef029484a165f99e258f546bba2d619b1c6485cb8875ac7a
-
SHA512
57031eb7d7b2c27d7ecacdc085d07065ced46a742128f9818f62c9fe6633c31aa8eb20ffc52c8415613787946060f5a6b5adf8b977d5ca4fed9656233ebd9cfa
-
SSDEEP
6144:tnzQnu/cmM1oSigOQT2F8U92Iu7DMVQZhWLvLRXdYX9ji+uhi2PsrhY:hzQnkM1oSiBGI8bxn5m6i+uo20tY
Malware Config
Extracted
C:\Users\Admin\AppData\Local\Packages\Microsoft.Windows.Cortana_cw5n1h2txyewy\LocalState\ConstraintIndex\Apps_{483efd7f-a9ad-4965-91df-941471710c01}\_DECRYPT_INFO_kkdcoa.html
http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd'>
http-equiv='Content-Type
Extracted
C:\Users\Admin\AppData\Local\Packages\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\AC\#!001\MicrosoftEdge\Cache\AZLQU08S\_DECRYPT_INFO_kkdcoa.html
http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd'>
http-equiv='Content-Type
Extracted
C:\ProgramData\Package Cache\{33d1fd90-4274-48a1-9bc1-97e33d9c2d6f}\_DECRYPT_INFO_kkdcoa.html
http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd'>
http-equiv='Content-Type
Signatures
-
Maktub Locker
Advanced ransomware family capable of offline decryption, generally distributed via .scr email attachments.
-
Deletes shadow copies 2 TTPs
Ransomware often targets backup files to inhibit system recovery.
-
Renames multiple (228) files with added filename extension
This suggests ransomware activity of encrypting all the files on the system.
-
ACProtect 1.3x - 1.4x DLL software 3 IoCs
Detects file using ACProtect software.
resource yara_rule behavioral1/memory/860-221-0x00000000039A0000-0x00000000039A8000-memory.dmp acprotect behavioral1/memory/860-224-0x00000000039A0000-0x00000000039A8000-memory.dmp acprotect behavioral1/memory/860-225-0x00000000039A0000-0x00000000039A8000-memory.dmp acprotect -
Uses Tor communications 1 TTPs
Malware can proxy its traffic through Tor for more anonymity.
-
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
-
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\ProcessorNameString WINWORD.EXE Key opened \REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0 WINWORD.EXE Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz WINWORD.EXE -
Enumerates system info in registry 2 TTPs 3 IoCs
description ioc Process Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU WINWORD.EXE Key opened \REGISTRY\MACHINE\Hardware\Description\System\BIOS WINWORD.EXE Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemFamily WINWORD.EXE -
Interacts with shadow copies 2 TTPs 1 IoCs
Shadow copies are often targeted by ransomware to inhibit system recovery.
pid Process 2192 vssadmin.exe -
Modifies registry class 1 IoCs
description ioc Process Key created \REGISTRY\USER\S-1-5-21-3727096518-2913484142-3593445157-1000_Classes\Local Settings d351ac17dc0d9476ef029484a165f99e258f546bba2d619b1c6485cb8875ac7a.exe -
Suspicious behavior: AddClipboardFormatListener 2 IoCs
pid Process 3964 WINWORD.EXE 3964 WINWORD.EXE -
Suspicious behavior: EnumeratesProcesses 2 IoCs
pid Process 860 d351ac17dc0d9476ef029484a165f99e258f546bba2d619b1c6485cb8875ac7a.exe 860 d351ac17dc0d9476ef029484a165f99e258f546bba2d619b1c6485cb8875ac7a.exe -
Suspicious use of AdjustPrivilegeToken 3 IoCs
description pid Process Token: SeBackupPrivilege 2108 vssvc.exe Token: SeRestorePrivilege 2108 vssvc.exe Token: SeAuditPrivilege 2108 vssvc.exe -
Suspicious use of SetWindowsHookEx 7 IoCs
pid Process 3964 WINWORD.EXE 3964 WINWORD.EXE 3964 WINWORD.EXE 3964 WINWORD.EXE 3964 WINWORD.EXE 3964 WINWORD.EXE 3964 WINWORD.EXE -
Suspicious use of WriteProcessMemory 4 IoCs
description pid Process procid_target PID 860 wrote to memory of 3964 860 d351ac17dc0d9476ef029484a165f99e258f546bba2d619b1c6485cb8875ac7a.exe 72 PID 860 wrote to memory of 3964 860 d351ac17dc0d9476ef029484a165f99e258f546bba2d619b1c6485cb8875ac7a.exe 72 PID 860 wrote to memory of 2192 860 d351ac17dc0d9476ef029484a165f99e258f546bba2d619b1c6485cb8875ac7a.exe 76 PID 860 wrote to memory of 2192 860 d351ac17dc0d9476ef029484a165f99e258f546bba2d619b1c6485cb8875ac7a.exe 76 -
Uses Volume Shadow Copy service COM API
The Volume Shadow Copy service is used to manage backups/snapshots.
Processes
-
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:860 -
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:3964
-
-
C:\Windows\SYSTEM32\vssadmin.exevssadmin.exe delete shadows /all /quiet2⤵
- Interacts with shadow copies
PID:2192
-
-
C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2108
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
-
Filesize
12KB
MD58e1de1a512bf533d9d3b1ff395b7a294
SHA15b7f21f12e9f43db3d348fa1786ddcdd589ce76a
SHA2561a58dc22c9a94bb738a7cef7f201d61858fd044611042cc82f1074a4c5978c9b
SHA51228d76d0f63fef98849e5122d5f3299181a8d1eb9e31abcdb79cb80b4155a4cfa4a1a0e4ef1487c7601510bc81ba1fecb42169f4605679078bffa9b56f004aed2
-
C:\Users\Admin\AppData\Local\Packages\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\AC\#!001\MicrosoftEdge\Cache\AZLQU08S\_DECRYPT_INFO_kkdcoa.html
Filesize12KB
MD5e5c7dbae2b58f4ce593c93f2a38a4c60
SHA16478b556f9de306e172d575ff2e698f0fab05662
SHA256d0eb709460b0d68d78df2d1634a087887f85636182363553cbc65a68787f8819
SHA512d8c6433551e7787640ad45e6c6a456e78a175fc0d06a034ea4b69d0ff2c09a1d0674a6e730af5833326f424aa2e799a4fbb12bbad39f744f978a3f199a30ad6d
-
C:\Users\Admin\AppData\Local\Packages\Microsoft.Windows.Cortana_cw5n1h2txyewy\LocalState\ConstraintIndex\Apps_{1cba3c91-bd2f-4472-8389-e5d32238123c}\0.1.filtertrie.intermediate.txt.kkdcoa
Filesize48B
MD57896a7cafdbc4f85a44d836312fb298e
SHA1f0dc00cce0b93fe8934a67fea8b856602fd8c66c
SHA2560a15c0fb8c033bbc00aa4600a161b3982b28ed8295e71bbe3864e31e23bf8794
SHA51202488ef77bf82f0dd07b44a6fc50f4be42f34833b24bd8fb73dce8ca4edb1e4b84c1ba0100b732b55ae0253b58a3b9c9844e54dfe6dc18c224869cad70d3f02f
-
C:\Users\Admin\AppData\Local\Packages\Microsoft.Windows.Cortana_cw5n1h2txyewy\LocalState\ConstraintIndex\Apps_{483efd7f-a9ad-4965-91df-941471710c01}\_DECRYPT_INFO_kkdcoa.html
Filesize12KB
MD58c5911deb208ba19cb4808b2e19139b8
SHA1476cb849d2894bb5ce043862676d688bfba23782
SHA2562b98ead80388189f7fd09e94204893d1a67cb6a493be8620d4d67fc059961e13
SHA5129e4d305ae6a296996106cab40702d29b28278d581a5b857e2d1fd200b719baecca673b9dee9ada47c7a95278e91f529623432cba4073996e4414ac50d224fc19
-
C:\Users\Admin\AppData\Local\Packages\Microsoft.Windows.Cortana_cw5n1h2txyewy\LocalState\ConstraintIndex\Apps_{c5f3c4a8-4475-46fb-b7e9-c28dcbc79a05}\0.2.filtertrie.intermediate.txt.kkdcoa
Filesize48B
MD55074babd8b3defec88c690d096ad178a
SHA162aefd1537ddad244055cb7f1faaa20fa42da7c7
SHA2563d753c6d19f80c80016d87a11d133f1cc9037c747d754e0a6d4089b0542905ca
SHA512fc77b988d49887e4ec932638c514296bf6c7749506b1288b18bc77d8d85da0d79ba2e8f81c76ebd478d00daebdf07074881d71af41a789dd268d28d4c636522f
-
C:\Users\Admin\AppData\Local\Temp\d351ac17dc0d9476ef029484a165f99e258f546bba2d619b1c6485cb8875ac7a.rtf
Filesize4KB
MD52d5020c82de674b48cfd17cc20fcbba2
SHA14e317eaeebd839ee5f6eb3925a9fbee819c5349c
SHA256120becd55248f4a2ccbbc99ba9d3c2932223264a95cd72e9ae7568be61277e9a
SHA512ffbbdda009237d6825f6cd6f751a41f4f9d716186901ffdbeed56c2d1410245771decd07f591cf56cafdd4bbebd4e4c74f009ff15736d5321635e34ff17d0d8d
-
C:\Users\Admin\AppData\Roaming\Microsoft\Templates\LiveContent\16\Managed\Word Document Bibliography Styles\TM02851223[[fn=iso690]].xsl
Filesize263KB
MD5ff0e07eff1333cdf9fc2523d323dd654
SHA177a1ae0dd8dbc3fee65dd6266f31e2a564d088a4
SHA2563f925e0cc1542f09de1f99060899eafb0042bb9682507c907173c392115a44b5
SHA512b4615f995fab87661c2dbe46625aa982215d7bde27cafae221dca76087fe76da4b4a381943436fcac1577cb3d260d0050b32b7b93e3eb07912494429f126bb3d