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
1190s -
max time network
1173s -
platform
windows10-2004_x64 -
resource
win10v2004-20240412-en -
resource tags
arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system -
submitted
14/04/2024, 14:18
Static task
static1
Behavioral task
behavioral1
Sample
d351ac17dc0d9476ef029484a165f99e258f546bba2d619b1c6485cb8875ac7a.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
d351ac17dc0d9476ef029484a165f99e258f546bba2d619b1c6485cb8875ac7a.exe
Resource
win10-20240404-en
Behavioral task
behavioral3
Sample
d351ac17dc0d9476ef029484a165f99e258f546bba2d619b1c6485cb8875ac7a.exe
Resource
win10v2004-20240412-en
Behavioral task
behavioral4
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.Search_cw5n1h2txyewy\LocalState\ConstraintIndex\Apps_{363e5077-e590-4a43-9d4c-20d5bcd6b5f9}\_DECRYPT_INFO_uijl.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_uijl.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 (218) 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 behavioral3/memory/3412-393-0x0000000003A60000-0x0000000003A68000-memory.dmp acprotect behavioral3/memory/3412-397-0x0000000003A60000-0x0000000003A68000-memory.dmp acprotect behavioral3/memory/3412-396-0x0000000003A60000-0x0000000003A68000-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-1-5-21-2177723727-746291240-1644359950-1000\Control Panel\International\Geo\Nation d351ac17dc0d9476ef029484a165f99e258f546bba2d619b1c6485cb8875ac7a.exe -
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\~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 1304 vssadmin.exe -
Modifies registry class 1 IoCs
description ioc Process Key created \REGISTRY\USER\S-1-5-21-2177723727-746291240-1644359950-1000_Classes\Local Settings d351ac17dc0d9476ef029484a165f99e258f546bba2d619b1c6485cb8875ac7a.exe -
Suspicious behavior: AddClipboardFormatListener 2 IoCs
pid Process 4180 WINWORD.EXE 4180 WINWORD.EXE -
Suspicious behavior: EnumeratesProcesses 2 IoCs
pid Process 3412 d351ac17dc0d9476ef029484a165f99e258f546bba2d619b1c6485cb8875ac7a.exe 3412 d351ac17dc0d9476ef029484a165f99e258f546bba2d619b1c6485cb8875ac7a.exe -
Suspicious use of AdjustPrivilegeToken 3 IoCs
description pid Process Token: SeBackupPrivilege 1436 vssvc.exe Token: SeRestorePrivilege 1436 vssvc.exe Token: SeAuditPrivilege 1436 vssvc.exe -
Suspicious use of SetWindowsHookEx 7 IoCs
pid Process 4180 WINWORD.EXE 4180 WINWORD.EXE 4180 WINWORD.EXE 4180 WINWORD.EXE 4180 WINWORD.EXE 4180 WINWORD.EXE 4180 WINWORD.EXE -
Suspicious use of WriteProcessMemory 4 IoCs
description pid Process procid_target PID 3412 wrote to memory of 4180 3412 d351ac17dc0d9476ef029484a165f99e258f546bba2d619b1c6485cb8875ac7a.exe 89 PID 3412 wrote to memory of 4180 3412 d351ac17dc0d9476ef029484a165f99e258f546bba2d619b1c6485cb8875ac7a.exe 89 PID 3412 wrote to memory of 1304 3412 d351ac17dc0d9476ef029484a165f99e258f546bba2d619b1c6485cb8875ac7a.exe 98 PID 3412 wrote to memory of 1304 3412 d351ac17dc0d9476ef029484a165f99e258f546bba2d619b1c6485cb8875ac7a.exe 98 -
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⤵
- Checks computer location settings
- Modifies registry class
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:3412 -
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:4180
-
-
C:\Windows\SYSTEM32\vssadmin.exevssadmin.exe delete shadows /all /quiet2⤵
- Interacts with shadow copies
PID:1304
-
-
C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1436
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
-
Filesize
12KB
MD5033c34a6ca06e77c1641bea623c19c3a
SHA11a50927e44986c0415be07cd91b51108b6893840
SHA2562a71fb2b10c44cbb288d36c4dc61a3c79d9fd2a17a9c97a035cec08762618466
SHA512444ad67fdc83ac6b9541655ae8740d3671a4383ca909486d950d9aff6d7637fedf98768169d4766313024b033a65f2980da2c768e76c919edcc2ae20f272b28f
-
C:\Users\Admin\AppData\Local\Packages\Microsoft.Windows.Search_cw5n1h2txyewy\LocalState\ConstraintIndex\Apps_{09e4e263-63aa-46b2-a9d2-78ac9a6d0c4e}\0.1.filtertrie.intermediate.txt.uijl
Filesize48B
MD5d7f2d6a360ebea2a80ecc514592ea3b8
SHA186ec3cfe59f5ca1fdf5bf9a1b2b09a2959fe413c
SHA256afa49614eb339e98079bc745201b17166769acd013622d8302bc50ec26cdf851
SHA5120c0ef99945a7b5564ad9db5a39839d77213f37f265461af793b33c68d065a813c2c5e138562dacd46076475ded7d16ee8bcc6c9345477f9dd2ecba15e3bbc31f
-
C:\Users\Admin\AppData\Local\Packages\Microsoft.Windows.Search_cw5n1h2txyewy\LocalState\ConstraintIndex\Apps_{09e4e263-63aa-46b2-a9d2-78ac9a6d0c4e}\0.2.filtertrie.intermediate.txt.uijl
Filesize48B
MD5432ae9580ae97279ece4fef8d304ea1c
SHA1d95b3d697d33b5a6d4a341424dbea6ed40f30c8d
SHA25602ca32b687b2883bc28b042216c523ca0d0fc41c973d4ca5c58e89605302c96d
SHA512e243a3236821318fcc78650ba6870eca36e1a308e67dd10dcdf670aef406497c78f42f25827db3d909dc6f2bb828f685bdd8c8eafaf9406a05289a838931112c
-
C:\Users\Admin\AppData\Local\Packages\Microsoft.Windows.Search_cw5n1h2txyewy\LocalState\ConstraintIndex\Apps_{363e5077-e590-4a43-9d4c-20d5bcd6b5f9}\_DECRYPT_INFO_uijl.html
Filesize12KB
MD5a584f6c7f35656dd1221868bf9ff9406
SHA19fab613dca1efa9b38464fb7a3068aef9a7b35a4
SHA2567ba991b72b95bbea2178d7851522bf7d5fd6b4fccbda0938e3dc0c263a1f12ae
SHA512aff0578e1e52e90c2538ba8317c10620f15285c618d677ad260cc0de1bcd9d3287f9e0fbffb90482fdf5ef0e39cc369f77e9f60b6636539fad39d17e1054c8a4
-
Filesize
263KB
MD5ff0e07eff1333cdf9fc2523d323dd654
SHA177a1ae0dd8dbc3fee65dd6266f31e2a564d088a4
SHA2563f925e0cc1542f09de1f99060899eafb0042bb9682507c907173c392115a44b5
SHA512b4615f995fab87661c2dbe46625aa982215d7bde27cafae221dca76087fe76da4b4a381943436fcac1577cb3d260d0050b32b7b93e3eb07912494429f126bb3d
-
C:\Users\Admin\AppData\Local\Temp\d351ac17dc0d9476ef029484a165f99e258f546bba2d619b1c6485cb8875ac7a.rtf
Filesize4KB
MD52d5020c82de674b48cfd17cc20fcbba2
SHA14e317eaeebd839ee5f6eb3925a9fbee819c5349c
SHA256120becd55248f4a2ccbbc99ba9d3c2932223264a95cd72e9ae7568be61277e9a
SHA512ffbbdda009237d6825f6cd6f751a41f4f9d716186901ffdbeed56c2d1410245771decd07f591cf56cafdd4bbebd4e4c74f009ff15736d5321635e34ff17d0d8d