3566f251fc87e551ac1ab020b4e9085caf803286eb7b8f1af65873c332ac492d

Analysis

max time kernel
119s
max time network
102s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
02/09/2024, 07:02

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General

Target

91b1eb48999a2dd74880c5a83a906400N.exe
Size

51KB
MD5

91b1eb48999a2dd74880c5a83a906400
SHA1

f403d0eca6661cc9d2082343b20643ef386141ec
SHA256

3566f251fc87e551ac1ab020b4e9085caf803286eb7b8f1af65873c332ac492d
SHA512

1bc866efc7f8b185bb753f45116fe00cc177ca5df4fa41aeeaac6a5b51fce377a322f9a7b5dcb8f587a10241011affdf915fef632c52271b8db5f4969e642a74
SSDEEP

768:kBT37CPKK1EXBwzEXBw3sgQw58eGkz2rcuesgQw58eGkz2rcu90TKe+0TKeinMdx:CTWUnMdyGdy4AnAP4YrJ

Score

9^/10

discovery ransomware upx

Malware Config

Signatures

Renames multiple (4680) 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/2056-0-0x0000000000400000-0x000000000040A000-memory.dmp	upx
behavioral2/files/0x000900000002340c-2.dat	upx
behavioral2/files/0x000c0000000220a6-6.dat	upx
behavioral2/memory/2056-874-0x0000000000400000-0x000000000040A000-memory.dmp	upx

Drops file in Program Files directory 64 IoCs

description	ioc	Process
File created	C:\Program Files\Microsoft Office\root\Office16\CLVIEW.EXE.tmp	91b1eb48999a2dd74880c5a83a906400N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\7.0.16\System.Web.HttpUtility.dll.tmp	91b1eb48999a2dd74880c5a83a906400N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.2\PresentationFramework.Luna.dll.tmp	91b1eb48999a2dd74880c5a83a906400N.exe
File created	C:\Program Files\Java\jre-1.8\bin\api-ms-win-core-debug-l1-1-0.dll.tmp	91b1eb48999a2dd74880c5a83a906400N.exe
File created	C:\Program Files\Java\jre-1.8\README.txt.tmp	91b1eb48999a2dd74880c5a83a906400N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\Excel2019VL_KMS_Client_AE-ul-oob.xrm-ms.tmp	91b1eb48999a2dd74880c5a83a906400N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\VisioProR_OEM_Perp-pl.xrm-ms.tmp	91b1eb48999a2dd74880c5a83a906400N.exe
File created	C:\Program Files\Microsoft Office\root\Office16\1033\XLLEX.DLL.tmp	91b1eb48999a2dd74880c5a83a906400N.exe
File created	C:\Program Files\Common Files\microsoft shared\OFFICE16\Office Setup Controller\pkeyconfig-office.xrm-ms.tmp	91b1eb48999a2dd74880c5a83a906400N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\System.IO.Compression.Brotli.dll.tmp	91b1eb48999a2dd74880c5a83a906400N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\System.Net.Quic.dll.tmp	91b1eb48999a2dd74880c5a83a906400N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\System.Printing.dll.tmp	91b1eb48999a2dd74880c5a83a906400N.exe
File created	C:\Program Files\Java\jre-1.8\lib\jsse.jar.tmp	91b1eb48999a2dd74880c5a83a906400N.exe
File created	C:\Program Files\Microsoft Office\root\Office16\1033\ClientSub_eula.txt.tmp	91b1eb48999a2dd74880c5a83a906400N.exe
File created	C:\Program Files\Microsoft Office\root\Office16\MSIPC\eu\msipc.dll.mui.tmp	91b1eb48999a2dd74880c5a83a906400N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\api-ms-win-core-interlocked-l1-1-0.dll.tmp	91b1eb48999a2dd74880c5a83a906400N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\VisioStdCO365R_SubTest-ul-oob.xrm-ms.tmp	91b1eb48999a2dd74880c5a83a906400N.exe
File created	C:\Program Files\Microsoft Office\root\Office16\LogoImages\OneNoteLogo.contrast-black_scale-80.png.tmp	91b1eb48999a2dd74880c5a83a906400N.exe
File created	C:\Program Files\Microsoft Office\root\Office16\LogoImages\OneNoteLogoSmall.contrast-white_scale-100.png.tmp	91b1eb48999a2dd74880c5a83a906400N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\O365ProPlusR_SubTrial4-ppd.xrm-ms.tmp	91b1eb48999a2dd74880c5a83a906400N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\7.0.16\System.Text.RegularExpressions.dll.tmp	91b1eb48999a2dd74880c5a83a906400N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\fr\Microsoft.VisualBasic.Forms.resources.dll.tmp	91b1eb48999a2dd74880c5a83a906400N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.2\pt-BR\ReachFramework.resources.dll.tmp	91b1eb48999a2dd74880c5a83a906400N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\O365HomePremR_Subscription1-ppd.xrm-ms.tmp	91b1eb48999a2dd74880c5a83a906400N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\System.Web.dll.tmp	91b1eb48999a2dd74880c5a83a906400N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\7.0.16\System.Diagnostics.FileVersionInfo.dll.tmp	91b1eb48999a2dd74880c5a83a906400N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\7.0.16\System.Text.Json.dll.tmp	91b1eb48999a2dd74880c5a83a906400N.exe
File created	C:\Program Files\Java\jre-1.8\bin\api-ms-win-core-interlocked-l1-1-0.dll.tmp	91b1eb48999a2dd74880c5a83a906400N.exe
File created	C:\Program Files\Java\jre-1.8\legal\jdk\relaxngcc.md.tmp	91b1eb48999a2dd74880c5a83a906400N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\ProjectPro2019DemoR_BypassTrial180-ul-oob.xrm-ms.tmp	91b1eb48999a2dd74880c5a83a906400N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\ProPlusMSDNR_Retail-ppd.xrm-ms.tmp	91b1eb48999a2dd74880c5a83a906400N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\Word2019R_Trial-pl.xrm-ms.tmp	91b1eb48999a2dd74880c5a83a906400N.exe
File created	C:\Program Files\Common Files\microsoft shared\ClickToRun\msvcp120.dll.tmp	91b1eb48999a2dd74880c5a83a906400N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\System.Diagnostics.EventLog.Messages.dll.tmp	91b1eb48999a2dd74880c5a83a906400N.exe
File created	C:\Program Files\Java\jdk-1.8\jre\legal\jdk\jopt-simple.md.tmp	91b1eb48999a2dd74880c5a83a906400N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\MondoR_EnterpriseSub_Bypass30-ul-oob.xrm-ms.tmp	91b1eb48999a2dd74880c5a83a906400N.exe
File created	C:\Program Files\Microsoft Office\root\Office16\AUDIOSEARCHLTS.DLL.tmp	91b1eb48999a2dd74880c5a83a906400N.exe
File created	C:\Program Files\7-Zip\Lang\ba.txt.tmp	91b1eb48999a2dd74880c5a83a906400N.exe
File created	C:\Program Files\Java\jre-1.8\lib\security\blacklisted.certs.tmp	91b1eb48999a2dd74880c5a83a906400N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\MondoR_ViewOnly_ZeroGrace-ppd.xrm-ms.tmp	91b1eb48999a2dd74880c5a83a906400N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\Word2019R_OEM_Perp-pl.xrm-ms.tmp	91b1eb48999a2dd74880c5a83a906400N.exe
File created	C:\Program Files\Microsoft Office\root\Office16\1033\TellMeWord.nrr.tmp	91b1eb48999a2dd74880c5a83a906400N.exe
File created	C:\Program Files\Common Files\microsoft shared\ink\de-DE\tabskb.dll.mui.tmp	91b1eb48999a2dd74880c5a83a906400N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\PowerPoint2019R_Retail-ul-oob.xrm-ms.tmp	91b1eb48999a2dd74880c5a83a906400N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\ProPlusR_Trial2-ul-oob.xrm-ms.tmp	91b1eb48999a2dd74880c5a83a906400N.exe
File created	C:\Program Files\Microsoft Office\root\Office16\ADDINS\Microsoft Power Query for Excel Integrated\bin\Microsoft.Mashup.Client.Excel.dll.tmp	91b1eb48999a2dd74880c5a83a906400N.exe
File created	C:\Program Files\Microsoft Office\root\Office16\ADDINS\PowerPivot Excel Add-in\Microsoft.AnalysisServices.SPClient.Interfaces.DLL.tmp	91b1eb48999a2dd74880c5a83a906400N.exe
File created	C:\Program Files\Microsoft Office\root\Office16\LogoImages\WinWordLogo.contrast-white_scale-180.png.tmp	91b1eb48999a2dd74880c5a83a906400N.exe
File created	C:\Program Files\Java\jdk-1.8\jre\bin\msvcp140_1.dll.tmp	91b1eb48999a2dd74880c5a83a906400N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\HomeBusinessR_OEM_Perp4-ul-phn.xrm-ms.tmp	91b1eb48999a2dd74880c5a83a906400N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\HomeStudent2019R_Retail-pl.xrm-ms.tmp	91b1eb48999a2dd74880c5a83a906400N.exe
File created	C:\Program Files\Microsoft Office\root\Office16\AugLoop\third-party-notices.txt.tmp	91b1eb48999a2dd74880c5a83a906400N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\mscordbi.dll.tmp	91b1eb48999a2dd74880c5a83a906400N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\System.IO.FileSystem.dll.tmp	91b1eb48999a2dd74880c5a83a906400N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\7.0.16\System.IO.FileSystem.Watcher.dll.tmp	91b1eb48999a2dd74880c5a83a906400N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\tr\Microsoft.VisualBasic.Forms.resources.dll.tmp	91b1eb48999a2dd74880c5a83a906400N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\ExcelVL_MAK-ul-phn.xrm-ms.tmp	91b1eb48999a2dd74880c5a83a906400N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\PowerPointVL_MAK-ppd.xrm-ms.tmp	91b1eb48999a2dd74880c5a83a906400N.exe
File created	C:\Program Files\Common Files\System\Ole DB\oledb32r.dll.tmp	91b1eb48999a2dd74880c5a83a906400N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\ja\WindowsFormsIntegration.resources.dll.tmp	91b1eb48999a2dd74880c5a83a906400N.exe
File created	C:\Program Files\Java\jdk-1.8\jre\lib\amd64\jvm.cfg.tmp	91b1eb48999a2dd74880c5a83a906400N.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\VisioProO365R_SubTrial-pl.xrm-ms.tmp	91b1eb48999a2dd74880c5a83a906400N.exe
File created	C:\Program Files\Common Files\microsoft shared\ink\TabIpsps.dll.tmp	91b1eb48999a2dd74880c5a83a906400N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\fr\WindowsFormsIntegration.resources.dll.tmp	91b1eb48999a2dd74880c5a83a906400N.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	91b1eb48999a2dd74880c5a83a906400N.exe

C:\Users\Admin\AppData\Local\Temp\91b1eb48999a2dd74880c5a83a906400N.exe
"C:\Users\Admin\AppData\Local\Temp\91b1eb48999a2dd74880c5a83a906400N.exe"
1⤵
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
PID:2056

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-1-5-21-523280732-2327480845-3730041215-1000\desktop.ini.tmp

Filesize
51KB

MD5
a0d9949a1f5244c42473232e1e6efc86

SHA1
5b602f42ad56469e78b37902ab8f697d7bab6b8f

SHA256
2ddd7866bfb709762a44d02f0adbfe371ac395206957fa1ba6eae3b935dd4fd5

SHA512
2b9daf30e86a33e9a3972516195974298540b419dfb83655a2d06a387aeb12c741dc4ebbc75908bad7b4f15b3fa9c645ebb8e81656201ebd5a74cc4ff87678bb

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

Filesize
150KB

MD5
045a7e152639129bc59613757167faff

SHA1
f2e132a1581d941df287dbb30ba4060f54b08a52

SHA256
8206be5532416abca94d3b23153a85a75594aea10827e86e6d9161387c5c5ca4

SHA512
7365d9b89f5c17983f7de4511c5354cd0c606dcb629f794a32cc4a62b153608510eb7bc67f7d89cf2beb5a21aca8aaa62ed9b95dca71f5e71e75f2393567f3b5

Download Submit
memory/2056-0-0x0000000000400000-0x000000000040A000-memory.dmp

Filesize
40KB

Download
memory/2056-874-0x0000000000400000-0x000000000040A000-memory.dmp

Filesize
40KB

Download