f43293b3b793ec7e897c7cd8950e6e2251cb0261782326a298c4fd946f5f0e85

Analysis

max time kernel
120s
max time network
115s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
05-09-2024 12:37

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General

Target

b23913897970621e035379872fb4f560N.exe
Size

53KB
MD5

b23913897970621e035379872fb4f560
SHA1

dc646e0ca2e83cc7c97f32db29049730a9423ae4
SHA256

f43293b3b793ec7e897c7cd8950e6e2251cb0261782326a298c4fd946f5f0e85
SHA512

6d41da545d4abddff0e53549c798cd942a1e30d500c839036ec87ca03f1542e162d1227422be76ba56bd11366b2e0317335ab661878630210cd843d883ec2e15
SSDEEP

768:kBT37CPKK1EXBwzEXBw3sgQw58eGkz2rcuesgQw58eGkz2rcu90TKe+0TKeinMdo:CTWUnMdyGdy4AnAP4FeUea

Score

9^/10

discovery ransomware upx

Malware Config

Signatures

Renames multiple (4652) files with added filename extension
This suggests ransomware activity of encrypting all the files on the system.
ransomware

UPX packed file 4 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral2/memory/4752-0-0x0000000000400000-0x000000000040A000-memory.dmp	upx
behavioral2/files/0x0009000000023437-2.dat	upx
behavioral2/files/0x00040000000228f4-6.dat	upx
behavioral2/memory/4752-929-0x0000000000400000-0x000000000040A000-memory.dmp	upx

Drops file in Program Files directory 64 IoCs

description	ioc	Process
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\7.0.16\System.Security.Claims.dll.tmp	b23913897970621e035379872fb4f560N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.2\msquic.dll.tmp	b23913897970621e035379872fb4f560N.exe
File created	C:\Program Files\Microsoft Office\root\Document Themes 16\Theme Fonts\Consolas-Verdana.xml.tmp	b23913897970621e035379872fb4f560N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\O365ProPlusR_SubTrial5-pl.xrm-ms.tmp	b23913897970621e035379872fb4f560N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\PersonalPipcR_OEM_Perp-ppd.xrm-ms.tmp	b23913897970621e035379872fb4f560N.exe
File created	C:\Program Files\Microsoft Office\root\Office16\ADDINS\PowerPivot Excel Add-in\Microsoft.Excel.DataWarehouse.dll.tmp	b23913897970621e035379872fb4f560N.exe
File created	C:\Program Files\Microsoft Office\root\Office16\LogoImages\OneNoteLogoSmall.scale-80.png.tmp	b23913897970621e035379872fb4f560N.exe
File created	C:\Program Files\Common Files\microsoft shared\ClickToRun\C2RINTL.zh-tw.dll.tmp	b23913897970621e035379872fb4f560N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\System.Memory.dll.tmp	b23913897970621e035379872fb4f560N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\ja\System.Windows.Input.Manipulations.resources.dll.tmp	b23913897970621e035379872fb4f560N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\tr\PresentationUI.resources.dll.tmp	b23913897970621e035379872fb4f560N.exe
File created	C:\Program Files\Microsoft Office\root\Office16\ADDINS\Power Map Excel Add-in\EXCELPLUGINDATAPROVIDER.DLL.tmp	b23913897970621e035379872fb4f560N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.2\fr\PresentationCore.resources.dll.tmp	b23913897970621e035379872fb4f560N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.2\PresentationFramework.Aero.dll.tmp	b23913897970621e035379872fb4f560N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.2\ru\System.Windows.Forms.Primitives.resources.dll.tmp	b23913897970621e035379872fb4f560N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\ProPlus2019R_OEM_Perp4-ppd.xrm-ms.tmp	b23913897970621e035379872fb4f560N.exe
File created	C:\Program Files\Microsoft Office\root\Office16\1033\BHOINTL.DLL.tmp	b23913897970621e035379872fb4f560N.exe
File created	C:\Program Files\Common Files\microsoft shared\ink\ipsjpn.xml.tmp	b23913897970621e035379872fb4f560N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.2\pl\PresentationCore.resources.dll.tmp	b23913897970621e035379872fb4f560N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\ko\PresentationFramework.resources.dll.tmp	b23913897970621e035379872fb4f560N.exe
File created	C:\Program Files\Java\jdk-1.8\jre\lib\security\policy\limited\local_policy.jar.tmp	b23913897970621e035379872fb4f560N.exe
File created	C:\Program Files\Java\jre-1.8\bin\api-ms-win-core-file-l2-1-0.dll.tmp	b23913897970621e035379872fb4f560N.exe
File created	C:\Program Files\Java\jre-1.8\lib\cmm\GRAY.pf.tmp	b23913897970621e035379872fb4f560N.exe
File created	C:\Program Files\Microsoft Office\root\Document Themes 16\Theme Effects\Banded Edge.eftx.tmp	b23913897970621e035379872fb4f560N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\Standard2019VL_KMS_Client_AE-ul-oob.xrm-ms.tmp	b23913897970621e035379872fb4f560N.exe
File created	C:\Program Files\Microsoft Office\root\Office16\BORDERS\MSART6.BDR.tmp	b23913897970621e035379872fb4f560N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.2\System.Private.Xml.dll.tmp	b23913897970621e035379872fb4f560N.exe
File created	C:\Program Files\Google\Chrome\Application\123.0.6312.123\Locales\uk.pak.tmp	b23913897970621e035379872fb4f560N.exe
File created	C:\Program Files\Java\jdk-1.8\legal\jdk\mesa3d.md.tmp	b23913897970621e035379872fb4f560N.exe
File created	C:\Program Files\Microsoft Office\root\Client\api-ms-win-crt-environment-l1-1-0.dll.tmp	b23913897970621e035379872fb4f560N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\ProjectProR_OEM_Perp-ppd.xrm-ms.tmp	b23913897970621e035379872fb4f560N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\ko\PresentationCore.resources.dll.tmp	b23913897970621e035379872fb4f560N.exe
File created	C:\Program Files\Java\jre-1.8\bin\prism_d3d.dll.tmp	b23913897970621e035379872fb4f560N.exe
File created	C:\Program Files\Microsoft Office\root\fre\StartMenu_Win8.mp4.tmp	b23913897970621e035379872fb4f560N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\ProjectStdCO365R_SubTrial-pl.xrm-ms.tmp	b23913897970621e035379872fb4f560N.exe
File created	C:\Program Files\Microsoft Office\root\Office16\LogoImages\OneNoteLogoSmall.contrast-black_scale-140.png.tmp	b23913897970621e035379872fb4f560N.exe
File created	C:\Program Files\Common Files\microsoft shared\ClickToRun\AppVIsvStreamingManager.dll.tmp	b23913897970621e035379872fb4f560N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\PresentationFramework.Classic.dll.tmp	b23913897970621e035379872fb4f560N.exe
File created	C:\Program Files\Java\jdk-1.8\jre\bin\pack200.exe.tmp	b23913897970621e035379872fb4f560N.exe
File created	C:\Program Files\Java\jre-1.8\lib\sound.properties.tmp	b23913897970621e035379872fb4f560N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\PowerPointVL_MAK-pl.xrm-ms.tmp	b23913897970621e035379872fb4f560N.exe
File created	C:\Program Files\Microsoft Office\root\Office16\1033\msotdintl.dll.tmp	b23913897970621e035379872fb4f560N.exe
File created	C:\Program Files\Microsoft Office\root\Office16\3082\MSO.ACL.tmp	b23913897970621e035379872fb4f560N.exe
File created	C:\Program Files\Java\jdk-1.8\bin\schemagen.exe.tmp	b23913897970621e035379872fb4f560N.exe
File created	C:\Program Files\Java\jdk-1.8\jre\bin\api-ms-win-crt-convert-l1-1-0.dll.tmp	b23913897970621e035379872fb4f560N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\SkypeforBusinessVL_KMS_Client-ppd.xrm-ms.tmp	b23913897970621e035379872fb4f560N.exe
File created	C:\Program Files\Microsoft Office\root\Office16\1033\PROTTPLV.DOC.tmp	b23913897970621e035379872fb4f560N.exe
File created	C:\Program Files\Microsoft Office\root\Office16\ADDINS\PowerPivot Excel Add-in\Microsoft.Data.Recommendation.Common.dll.tmp	b23913897970621e035379872fb4f560N.exe
File created	C:\Program Files\Common Files\microsoft shared\ink\fr-FR\rtscom.dll.mui.tmp	b23913897970621e035379872fb4f560N.exe
File created	C:\Program Files\Common Files\microsoft shared\ink\fsdefinitions\symbols\ea-sym.xml.tmp	b23913897970621e035379872fb4f560N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\Microsoft.VisualBasic.Forms.dll.tmp	b23913897970621e035379872fb4f560N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\zh-Hant\ReachFramework.resources.dll.tmp	b23913897970621e035379872fb4f560N.exe
File created	C:\Program Files\Java\jdk-1.8\jre\bin\hprof.dll.tmp	b23913897970621e035379872fb4f560N.exe
File created	C:\Program Files\Java\jdk-1.8\jre\bin\kinit.exe.tmp	b23913897970621e035379872fb4f560N.exe
File created	C:\Program Files\Java\jdk-1.8\legal\jdk\relaxngcc.md.tmp	b23913897970621e035379872fb4f560N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\O365EduCloudEDUR_Grace-ul-oob.xrm-ms.tmp	b23913897970621e035379872fb4f560N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\ProjectStdR_OEM_Perp-ul-phn.xrm-ms.tmp	b23913897970621e035379872fb4f560N.exe
File created	C:\Program Files\Microsoft Office\root\Office16\ADDINS\Power Map Excel Add-in\VISUALIZATIONDIRECTX.DLL.tmp	b23913897970621e035379872fb4f560N.exe
File created	C:\Program Files\7-Zip\Lang\sa.txt.tmp	b23913897970621e035379872fb4f560N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\O365HomePremR_Grace-ul-oob.xrm-ms.tmp	b23913897970621e035379872fb4f560N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.2\System.IO.Compression.Native.dll.tmp	b23913897970621e035379872fb4f560N.exe
File created	C:\Program Files\Common Files\microsoft shared\ink\hwrenclm.dat.tmp	b23913897970621e035379872fb4f560N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\Microsoft.VisualBasic.Forms.dll.tmp	b23913897970621e035379872fb4f560N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\Excel2019VL_MAK_AE-ul-oob.xrm-ms.tmp	b23913897970621e035379872fb4f560N.exe

System Location Discovery: System Language Discovery 1 TTPs 1 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	b23913897970621e035379872fb4f560N.exe

C:\Users\Admin\AppData\Local\Temp\b23913897970621e035379872fb4f560N.exe
"C:\Users\Admin\AppData\Local\Temp\b23913897970621e035379872fb4f560N.exe"
1⤵
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
PID:4752

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\$Recycle.Bin\S-1-5-21-2392887640-1187051047-2909758433-1000\desktop.ini.tmp

Filesize
54KB

MD5
93e68ee7078b828047960ae05f9871a5

SHA1
3a816bf8275891d22052415315e989d1bd4c25e4

SHA256
3eae2a025c509844b10d27f10aa3ef6d20f6726872efb74f9ae43a72638268ae

SHA512
bfe527652ebc6e2e8861d8ef7e6d39c153ddb0d47b146a501d54ad3de82ccaf8adc8e73a79cf1c6ca4ca9eb5b0749359ff12a13c152f019aca8720a84069c81b

Download Submit
C:\Program Files\7-Zip\7-zip.dll.tmp

Filesize
152KB

MD5
9d0550a10ae991d7b50160d3f2e5b1e1

SHA1
d8ec308bc91254673be1b775d247e6d5d11676cf

SHA256
52440f1898a3e43eac9c8d585d83ceaf24ffc2b4c53867e1d2de13f065f57ff7

SHA512
d1aa774e512805fd0dda0155f50c08eadac1bcba9135c5218287f55bcebf6886df7d953107daa8f98988b9d6091a1988ad4e11377cd60eb7531b6b67f24e3099

Download Submit
memory/4752-0-0x0000000000400000-0x000000000040A000-memory.dmp

Filesize
40KB

Download
memory/4752-929-0x0000000000400000-0x000000000040A000-memory.dmp

Filesize
40KB

Download