49b328470016a01c18f105f1ed3b87741d59be9352bd0ac104ca5b7979f0778f

Analysis

max time kernel
120s
max time network
120s
platform
windows10-2004_x64
resource
win10v2004-20240709-en
resource tags

arch:x64arch:x86image:win10v2004-20240709-enlocale:en-usos:windows10-2004-x64system
submitted
27-07-2024 10:09

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General

Target

b4a503765aea08784b95f98537262d00N.exe
Size

23KB
MD5

b4a503765aea08784b95f98537262d00
SHA1

0d4e99bc5c3a8e266890230e083879899fac6414
SHA256

49b328470016a01c18f105f1ed3b87741d59be9352bd0ac104ca5b7979f0778f
SHA512

a474667b90a2af3accef33f31780d909bb5269639508ff6fa7a319eef235bdbbdfd98d6b77e9c65eef6d1eed01cde2f4e91049e17976e43e38f38316116d9fbc
SSDEEP

384:QOlIBXDaU7CPKK0TIhfJJcbQbf1Oti1JGBQOOiQJhATm+uA+ue924Su0QK8u2l1O:kBT37CPKKdJJcbQbf1Oti1JGBQOOiQJo

Score

9^/10

discovery ransomware upx

Malware Config

Signatures

Renames multiple (1760) 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/4968-0-0x0000000000400000-0x000000000040A000-memory.dmp	upx
behavioral2/files/0x0009000000023434-2.dat	upx
behavioral2/files/0x0014000000022946-6.dat	upx
behavioral2/memory/4968-290-0x0000000000400000-0x000000000040A000-memory.dmp	upx

Drops file in Program Files directory 64 IoCs

description	ioc	Process
File created	C:\Program Files\Common Files\microsoft shared\ClickToRun\AppVIsvSubsystemController.dll.tmp	b4a503765aea08784b95f98537262d00N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\System.Linq.Queryable.dll.tmp	b4a503765aea08784b95f98537262d00N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\7.0.16\System.Collections.Concurrent.dll.tmp	b4a503765aea08784b95f98537262d00N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\pt-BR\ReachFramework.resources.dll.tmp	b4a503765aea08784b95f98537262d00N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\System.Security.Cryptography.Pkcs.dll.tmp	b4a503765aea08784b95f98537262d00N.exe
File created	C:\Program Files\Common Files\microsoft shared\ClickToRun\C2RUI.dll.tmp	b4a503765aea08784b95f98537262d00N.exe
File created	C:\Program Files\Common Files\microsoft shared\ClickToRun\RepoMan.dll.tmp	b4a503765aea08784b95f98537262d00N.exe
File created	C:\Program Files\Common Files\microsoft shared\ink\ipssrl.xml.tmp	b4a503765aea08784b95f98537262d00N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\7.0.16\System.Runtime.Serialization.dll.tmp	b4a503765aea08784b95f98537262d00N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\zh-Hans\UIAutomationClientSideProviders.resources.dll.tmp	b4a503765aea08784b95f98537262d00N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\PresentationFramework-SystemDrawing.dll.tmp	b4a503765aea08784b95f98537262d00N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.2\PresentationFramework-SystemData.dll.tmp	b4a503765aea08784b95f98537262d00N.exe
File created	C:\Program Files\Common Files\microsoft shared\ink\ipsen.xml.tmp	b4a503765aea08784b95f98537262d00N.exe
File created	C:\Program Files\Common Files\System\ado\msader15.dll.tmp	b4a503765aea08784b95f98537262d00N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\7.0.16\System.Linq.Expressions.dll.tmp	b4a503765aea08784b95f98537262d00N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\7.0.16\System.Numerics.dll.tmp	b4a503765aea08784b95f98537262d00N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.2\Accessibility.dll.tmp	b4a503765aea08784b95f98537262d00N.exe
File created	C:\Program Files\7-Zip\Lang\bn.txt.tmp	b4a503765aea08784b95f98537262d00N.exe
File created	C:\Program Files\Common Files\System\ado\es-ES\msader15.dll.mui.tmp	b4a503765aea08784b95f98537262d00N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\7.0.16\System.ObjectModel.dll.tmp	b4a503765aea08784b95f98537262d00N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\cs\UIAutomationClient.resources.dll.tmp	b4a503765aea08784b95f98537262d00N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\cs\UIAutomationProvider.resources.dll.tmp	b4a503765aea08784b95f98537262d00N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\tr\System.Windows.Forms.resources.dll.tmp	b4a503765aea08784b95f98537262d00N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\pt-BR\WindowsBase.resources.dll.tmp	b4a503765aea08784b95f98537262d00N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.2\System.Transactions.dll.tmp	b4a503765aea08784b95f98537262d00N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\fr\System.Windows.Input.Manipulations.resources.dll.tmp	b4a503765aea08784b95f98537262d00N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\System.Net.Sockets.dll.tmp	b4a503765aea08784b95f98537262d00N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\7.0.16\System.Buffers.dll.tmp	b4a503765aea08784b95f98537262d00N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\7.0.16\System.Collections.dll.tmp	b4a503765aea08784b95f98537262d00N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.2\zh-Hans\PresentationCore.resources.dll.tmp	b4a503765aea08784b95f98537262d00N.exe
File created	C:\Program Files\Common Files\microsoft shared\ink\fsdefinitions\main\base_altgr.xml.tmp	b4a503765aea08784b95f98537262d00N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\System.Runtime.CompilerServices.VisualC.dll.tmp	b4a503765aea08784b95f98537262d00N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\System.Xml.XPath.XDocument.dll.tmp	b4a503765aea08784b95f98537262d00N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\7.0.16\System.ValueTuple.dll.tmp	b4a503765aea08784b95f98537262d00N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.2\System.ComponentModel.TypeConverter.dll.tmp	b4a503765aea08784b95f98537262d00N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\pt-BR\UIAutomationClient.resources.dll.tmp	b4a503765aea08784b95f98537262d00N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.2\es\PresentationFramework.resources.dll.tmp	b4a503765aea08784b95f98537262d00N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.2\System.Design.dll.tmp	b4a503765aea08784b95f98537262d00N.exe
File created	C:\Program Files\Common Files\microsoft shared\Source Engine\OSE.EXE.tmp	b4a503765aea08784b95f98537262d00N.exe
File created	C:\Program Files\Common Files\System\msadc\es-ES\msadcor.dll.mui.tmp	b4a503765aea08784b95f98537262d00N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\api-ms-win-crt-runtime-l1-1-0.dll.tmp	b4a503765aea08784b95f98537262d00N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\System.Resources.ResourceManager.dll.tmp	b4a503765aea08784b95f98537262d00N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\es\System.Xaml.resources.dll.tmp	b4a503765aea08784b95f98537262d00N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\Microsoft.VisualBasic.dll.tmp	b4a503765aea08784b95f98537262d00N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\ru\System.Windows.Controls.Ribbon.resources.dll.tmp	b4a503765aea08784b95f98537262d00N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\es\System.Windows.Forms.Primitives.resources.dll.tmp	b4a503765aea08784b95f98537262d00N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\PresentationFramework.Luna.dll.tmp	b4a503765aea08784b95f98537262d00N.exe
File created	C:\Program Files\Common Files\microsoft shared\ink\fr-FR\tabskb.dll.mui.tmp	b4a503765aea08784b95f98537262d00N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\fr\System.Windows.Forms.Design.resources.dll.tmp	b4a503765aea08784b95f98537262d00N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\tr\System.Xaml.resources.dll.tmp	b4a503765aea08784b95f98537262d00N.exe
File created	C:\Program Files\7-Zip\Lang\af.txt.tmp	b4a503765aea08784b95f98537262d00N.exe
File created	C:\Program Files\Common Files\System\ado\it-IT\msader15.dll.mui.tmp	b4a503765aea08784b95f98537262d00N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\api-ms-win-core-file-l1-1-0.dll.tmp	b4a503765aea08784b95f98537262d00N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.2\cs\PresentationCore.resources.dll.tmp	b4a503765aea08784b95f98537262d00N.exe
File created	C:\Program Files\7-Zip\Lang\co.txt.tmp	b4a503765aea08784b95f98537262d00N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\api-ms-win-core-processthreads-l1-1-0.dll.tmp	b4a503765aea08784b95f98537262d00N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\tr\ReachFramework.resources.dll.tmp	b4a503765aea08784b95f98537262d00N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.2\de\Microsoft.VisualBasic.Forms.resources.dll.tmp	b4a503765aea08784b95f98537262d00N.exe
File created	C:\Program Files\7-Zip\Lang\zh-tw.txt.tmp	b4a503765aea08784b95f98537262d00N.exe
File created	C:\Program Files\7-Zip\Lang\ja.txt.tmp	b4a503765aea08784b95f98537262d00N.exe
File created	C:\Program Files\Common Files\microsoft shared\ClickToRun\C2RINTL.ko-kr.dll.tmp	b4a503765aea08784b95f98537262d00N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\7.0.16\System.ComponentModel.Annotations.dll.tmp	b4a503765aea08784b95f98537262d00N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.2\System.ServiceModel.Web.dll.tmp	b4a503765aea08784b95f98537262d00N.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\pl\WindowsBase.resources.dll.tmp	b4a503765aea08784b95f98537262d00N.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	b4a503765aea08784b95f98537262d00N.exe

C:\Users\Admin\AppData\Local\Temp\b4a503765aea08784b95f98537262d00N.exe
"C:\Users\Admin\AppData\Local\Temp\b4a503765aea08784b95f98537262d00N.exe"
1⤵
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
PID:4968

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-1-5-21-47134698-4092160662-1261813102-1000\desktop.ini.tmp

Filesize
23KB

MD5
81f4f861bf505834a23af9396c79bd77

SHA1
2342b0b72b2d0d6d45f4f57990d15e84565aa69f

SHA256
7f744a5f327c7e61bd365d01a253dabf40931e36727c3bb705654d713beecef1

SHA512
bd07ddbd409ec54ce18d8bee11b7b77a1cb0b82ddd8a519afaf25ddd118b167a0ab6199413439b3fa7180940badabc545d8e6bfeedfc4187a0c093e989e3e020

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

Filesize
122KB

MD5
62dd92f0d00cff5b1e06ac20b5c53305

SHA1
5ffd9fd64d5618436f4e2f569d1891090ead28c3

SHA256
33365d283c3136402f16d1607c1bc09ba4d50a95d1e366f02b711ff6ff78ac20

SHA512
60d845041b05626794970a195a449fb72bbe8068fe702c4516dfa8d7f88bc602d409d76769c6d9f75fd900d044131a42dabc32f13e57a5ef53a2eff198e7ee4a

Download Submit
memory/4968-0-0x0000000000400000-0x000000000040A000-memory.dmp

Filesize
40KB

Download
memory/4968-290-0x0000000000400000-0x000000000040A000-memory.dmp

Filesize
40KB

Download