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
591s -
max time network
573s -
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_{ed53f087-649e-4bf8-9403-a63f797af524}\_DECRYPT_INFO_rdafkq.html
http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd'>
http-equiv='Content-Type
Extracted
C:\ProgramData\Package Cache\{ef6b00ec-13e1-4c25-9064-b2f383cb8412}\_DECRYPT_INFO_rdafkq.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 (296) 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/4244-53-0x0000000003A60000-0x0000000003A68000-memory.dmp acprotect behavioral3/memory/4244-52-0x0000000003A60000-0x0000000003A68000-memory.dmp acprotect behavioral3/memory/4244-49-0x0000000003A60000-0x0000000003A68000-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 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 4528 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 4480 WINWORD.EXE 4480 WINWORD.EXE -
Suspicious behavior: EnumeratesProcesses 2 IoCs
pid Process 4244 d351ac17dc0d9476ef029484a165f99e258f546bba2d619b1c6485cb8875ac7a.exe 4244 d351ac17dc0d9476ef029484a165f99e258f546bba2d619b1c6485cb8875ac7a.exe -
Suspicious use of AdjustPrivilegeToken 3 IoCs
description pid Process Token: SeBackupPrivilege 1308 vssvc.exe Token: SeRestorePrivilege 1308 vssvc.exe Token: SeAuditPrivilege 1308 vssvc.exe -
Suspicious use of SetWindowsHookEx 7 IoCs
pid Process 4480 WINWORD.EXE 4480 WINWORD.EXE 4480 WINWORD.EXE 4480 WINWORD.EXE 4480 WINWORD.EXE 4480 WINWORD.EXE 4480 WINWORD.EXE -
Suspicious use of WriteProcessMemory 4 IoCs
description pid Process procid_target PID 4244 wrote to memory of 4480 4244 d351ac17dc0d9476ef029484a165f99e258f546bba2d619b1c6485cb8875ac7a.exe 82 PID 4244 wrote to memory of 4480 4244 d351ac17dc0d9476ef029484a165f99e258f546bba2d619b1c6485cb8875ac7a.exe 82 PID 4244 wrote to memory of 4528 4244 d351ac17dc0d9476ef029484a165f99e258f546bba2d619b1c6485cb8875ac7a.exe 97 PID 4244 wrote to memory of 4528 4244 d351ac17dc0d9476ef029484a165f99e258f546bba2d619b1c6485cb8875ac7a.exe 97 -
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:4244 -
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:4480
-
-
C:\Windows\SYSTEM32\vssadmin.exevssadmin.exe delete shadows /all /quiet2⤵
- Interacts with shadow copies
PID:4528
-
-
C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1308
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
-
Filesize
12KB
MD561f2c9bd202814544e523e8c6600fdf9
SHA155053f5b11eaa9b3492cd2b633c72aafe5f03f3a
SHA256d79ccfda210f085dbf3a72cbbe88f8eaa6a101d0a302dd648f671eb783542b2d
SHA5127c84b98fec3f5bec78a89930a713f9cd68b2bdb9d0c8e8be8ef5b3a64b1b3d333fe6ad0165e101b00c4cbb5d477124eebcc01e5a3d9c05105091dce6dd174e1b
-
C:\Users\Admin\AppData\Local\Packages\Microsoft.Windows.Search_cw5n1h2txyewy\LocalState\ConstraintIndex\Apps_{bdca6734-1ad1-4fbf-9535-789a6150f32a}\0.1.filtertrie.intermediate.txt.rdafkq
Filesize48B
MD56c9664ee1d4afd277fc2380bc9b0998c
SHA16691460f5325ef0009026bcf3d32e7a9e37b643a
SHA25610cccc39064ce090f735d3980caa2ca999b1f6a72b95fc4ace518026d92bfc19
SHA512a532955096543ee55220fc2e6579d12ba1e95832ade6c940f387e3093fb1aa16e2f6ecacddb863a3645b9e117fd71c5ca6c2deaa68206aeabb33c8527311cf41
-
C:\Users\Admin\AppData\Local\Packages\Microsoft.Windows.Search_cw5n1h2txyewy\LocalState\ConstraintIndex\Apps_{bdca6734-1ad1-4fbf-9535-789a6150f32a}\0.2.filtertrie.intermediate.txt.rdafkq
Filesize48B
MD5bd32dd5e607d189905a853fc50ea9828
SHA17bddcb89950683f650414eec743a80f09218bc7c
SHA256052d71757c20838918026b7e59090bdc9810ffa5ab7400938b65d21afeb3b2e9
SHA512ba5ee4d8643a605a5a80994cf13b44402d2eed590a40bca6cd99497b1f5dbe93f0974bc36b0394cd84b8ba5ff973619e22f5ad96d5408ee087b1a87084d5588f
-
C:\Users\Admin\AppData\Local\Packages\Microsoft.Windows.Search_cw5n1h2txyewy\LocalState\ConstraintIndex\Apps_{ed53f087-649e-4bf8-9403-a63f797af524}\_DECRYPT_INFO_rdafkq.html
Filesize12KB
MD58325eac9a20fe076d346b99def0c8bfc
SHA19f84f63321b0f14eed80f5ba96f7e3b650a7f918
SHA256db85b93bd8b06817f463a493d7f80639911931c613c922b15aecc53a486738bf
SHA5120bc2b734bca7eb948b155da9c2f4c2a020007b0b7e01d551df24444a94869719fa2ce6a962e363a418de90713bf62d2dcc95ae4924241df5cf447c1c0f6749f0
-
Filesize
263KB
MD5ff0e07eff1333cdf9fc2523d323dd654
SHA177a1ae0dd8dbc3fee65dd6266f31e2a564d088a4
SHA2563f925e0cc1542f09de1f99060899eafb0042bb9682507c907173c392115a44b5
SHA512b4615f995fab87661c2dbe46625aa982215d7bde27cafae221dca76087fe76da4b4a381943436fcac1577cb3d260d0050b32b7b93e3eb07912494429f126bb3d
-
C:\Users\Admin\AppData\Local\Temp\d351ac17dc0d9476ef029484a165f99e258f546bba2d619b1c6485cb8875ac7a.rtf
Filesize4KB
MD52d5020c82de674b48cfd17cc20fcbba2
SHA14e317eaeebd839ee5f6eb3925a9fbee819c5349c
SHA256120becd55248f4a2ccbbc99ba9d3c2932223264a95cd72e9ae7568be61277e9a
SHA512ffbbdda009237d6825f6cd6f751a41f4f9d716186901ffdbeed56c2d1410245771decd07f591cf56cafdd4bbebd4e4c74f009ff15736d5321635e34ff17d0d8d