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
1791s -
max time network
1452s -
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, 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\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\AC\INetCache\XOSSWS1G\_DECRYPT_INFO_gpjtnzm.html
http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd'>
http-equiv='Content-Type
Extracted
C:\ProgramData\Mozilla-1de4eec8-1241-4177-a864-e594e8d1fb38\updates\308046B0AF4A39CB\_DECRYPT_INFO_gpjtnzm.html
http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd'>
http-equiv='Content-Type
Extracted
C:\Users\Admin\Desktop\backup_gpjtnzm\_DECRYPT_INFO_gpjtnzm.html
http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd'>
http-equiv='Content-Type
Signatures
-
Deletes shadow copies 2 TTPs
Ransomware often targets backup files to inhibit system recovery.
-
Renames multiple (220) 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 behavioral5/memory/4296-52-0x0000000003B00000-0x0000000003B08000-memory.dmp acprotect behavioral5/memory/4296-56-0x0000000003B00000-0x0000000003B08000-memory.dmp acprotect behavioral5/memory/4296-55-0x0000000003B00000-0x0000000003B08000-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 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 3880 vssadmin.exe -
Modifies registry class 1 IoCs
description ioc Process Key created \REGISTRY\USER\S-1-5-21-3777591257-2471171023-3629228286-1000_Classes\Local Settings d351ac17dc0d9476ef029484a165f99e258f546bba2d619b1c6485cb8875ac7a.exe -
Suspicious behavior: AddClipboardFormatListener 2 IoCs
pid Process 3304 WINWORD.EXE 3304 WINWORD.EXE -
Suspicious behavior: EnumeratesProcesses 2 IoCs
pid Process 4296 d351ac17dc0d9476ef029484a165f99e258f546bba2d619b1c6485cb8875ac7a.exe 4296 d351ac17dc0d9476ef029484a165f99e258f546bba2d619b1c6485cb8875ac7a.exe -
Suspicious use of AdjustPrivilegeToken 3 IoCs
description pid Process Token: SeBackupPrivilege 712 vssvc.exe Token: SeRestorePrivilege 712 vssvc.exe Token: SeAuditPrivilege 712 vssvc.exe -
Suspicious use of SetWindowsHookEx 7 IoCs
pid Process 3304 WINWORD.EXE 3304 WINWORD.EXE 3304 WINWORD.EXE 3304 WINWORD.EXE 3304 WINWORD.EXE 3304 WINWORD.EXE 3304 WINWORD.EXE -
Suspicious use of WriteProcessMemory 4 IoCs
description pid Process procid_target PID 4296 wrote to memory of 3304 4296 d351ac17dc0d9476ef029484a165f99e258f546bba2d619b1c6485cb8875ac7a.exe 82 PID 4296 wrote to memory of 3304 4296 d351ac17dc0d9476ef029484a165f99e258f546bba2d619b1c6485cb8875ac7a.exe 82 PID 4296 wrote to memory of 3880 4296 d351ac17dc0d9476ef029484a165f99e258f546bba2d619b1c6485cb8875ac7a.exe 86 PID 4296 wrote to memory of 3880 4296 d351ac17dc0d9476ef029484a165f99e258f546bba2d619b1c6485cb8875ac7a.exe 86 -
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:4296 -
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:3304
-
-
C:\Windows\SYSTEM32\vssadmin.exevssadmin.exe delete shadows /all /quiet2⤵
- Interacts with shadow copies
PID:3880
-
-
C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Suspicious use of AdjustPrivilegeToken
PID:712
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
-
C:\ProgramData\Mozilla-1de4eec8-1241-4177-a864-e594e8d1fb38\updates\308046B0AF4A39CB\_DECRYPT_INFO_gpjtnzm.html
Filesize12KB
MD51ed9cf84ae82ea4bb99b16c4a87792ff
SHA1378aeb242a0215d35fe02c534a1386aeaf333867
SHA25623a1cffea17f428ba1363fe99ee670d0f2b60a04c9dcccbbd49dbc192d91cd15
SHA5122bd2a404c834682da9cbe9a099f14072d3f52f3f89082f6ec292c9a14f3c23db5981a4abd32b52a48391b4142fd8755c4b410eb4224950151007a516eded2a1a
-
C:\Users\Admin\AppData\Local\Packages\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\AC\INetCache\XOSSWS1G\_DECRYPT_INFO_gpjtnzm.html
Filesize12KB
MD5bcc71655dcd13082875e16ce53db59c8
SHA1a860fc20fbfcc7660c0e7aafc5add46c8523d8b5
SHA2561f1399befaae45301bd5a7d12a1881eefeba1dc3b5198256a06b302d6c1ff70a
SHA512f12ec65ac60d2196f37e1e843dbe90e9c7cab25e12080377299120aef8794be1e3e14d9542979e21d8a6ddd4e2ba3cfeadcdf1a28c3858fe4d97f1415be0c0a6
-
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
-
Filesize
12KB
MD5462de414359a74fb8f030870ba4de647
SHA120e6749cc8d53a69ccdcb0815f8ebcdd20762d60
SHA256e2e3298677a9d72ce022e6ce19a76e036a01b57924ef8de7d7adcaa867cec31f
SHA512a48c3ad50dda1b9b7b0b1bc3aa4226ad9d455b1c09ead7f6d880d9bda68356beaf38d23df1cbb5544b052099a66f6f7506cb220b7774ca55a95101fc4c8336a6