bdaejec | 65fde5e5870f711e845eb74592c1bf784f68d6a7746101a9f6c27afaf4537e42

Analysis

max time kernel
148s
max time network
147s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260709-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
09/08/2026, 10:48

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General

Target
65fde5e5870f711e845eb74592c1bf784f68d6a7746101a9f6c27afaf4537e42.exe
Size 775KB
Sample260809-mwlxesztaz
SHA256 65fde5e5870f711e845eb74592c1bf784f68d6a7746101a9f6c27afaf4537e42
MD5 3749c1530e60de7c75f4cb8d2c230df4
SHA1 9fd95e77e39c921ed88dae8d4a31eb87e1739540
SHA512 e65e81821fadf755263e6ee74e5e28630af734afda7ff7d28411f8168a6fa03a2691bb7469bd3abe8a9166a430994f8d13d74fc93eb256a20d5105b02c0d9b2d
SSDEEP 24576:wIEFhT8VvrE5V7frOIhyN3Mh4zKXn8wS0fU:RShTKr4bVQ3M+hh0M
TLSH
T1B8F423007C508C77C9C414B6BA16E5B2877E6C3219ABC3867B5E41E72D31BD5A8F634B
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

aspackv2 backdoor discovery execution bdaejec djvu ransomware

Malware Config

Extracted

Family

djvu

http://fuyt.org/test1/get.php

Attributes

extension
.wdlo
offline_id
i0fXrUHVihm5xsI9Icg243YMPJqd748Ocimkyjt1
payload_url
http://zerit.top/dl/build2.exe

http://fuyt.org/files/1/build3.exe
ransomnote
ATTENTION! Don't worry, you can return all your files! All your files like pictures, databases, documents and other important are encrypted with strongest encryption and unique key. The only method of recovering files is to purchase decrypt tool and unique key for you. This software will decrypt all your encrypted files. What guarantees you have? You can send one of your encrypted file from your PC and we decrypt it for free. But we can decrypt only 1 file for free. File must not contain valuable information. You can get and look video overview decrypt tool: https://we.tl/t-0S984cQ4B3 Price of private key and decrypt software is $980. Discount 50% available if you contact us first 72 hours, that's price for you is $490. Please note that you'll never restore your data without payment. Check your e-mail "Spam" or "Junk" folder if you don't get answer more than 6 hours. To get this software you need write on our e-mail: [email protected] Reserve e-mail address to contact us: [email protected] Your personal ID: 0430JIjdm

rsa_pubkey.plain

Extracted

Family

bdaejec

ddos.dnsnb8.net

Signatures

Family: Bdaejec
Bdaejec is a backdoor written in C++.
backdoor bdaejec
Family: Djvu Ransomware
Ransomware which is a variant of the STOP family.
ransomware djvu

Detected Djvu ransomware 2 IoCs

resource	yara_rule
behavioral2/memory/4708-10-0x00000000023C0000-0x00000000024DB000-memory.dmp	family_djvu
behavioral2/memory/1188-11-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu

Detects Bdaejec Backdoor. 1 IoCs

Bdaejec is backdoor written in C++.

resource	yara_rule
behavioral2/memory/2432-15-0x0000000000610000-0x0000000000619000-memory.dmp	family_bdaejec_backdoor

ASPack v2.12-2.42 1 IoCs

Detects executables packed with ASPack v2.12-2.42

aspackv2

resource	yara_rule
behavioral2/files/0x000700000001b888-6.dat	aspack_v212_v242

Executes dropped EXE 1 IoCs

pid	Process
2432	blK.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4708 set thread context of 1188	4708	65fde5e5870f711e845eb74592c1bf784f68d6a7746101a9f6c27afaf4537e42.exe	90

Drops file in Program Files directory 64 IoCs

description	ioc	Process
File opened for modification	C:\Program Files\Java\jdk-1.8\bin\jps.exe	blK.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Office16\CNFNOT32.EXE	blK.exe
File opened for modification	C:\Program Files\Windows Mail\wabmig.exe	blK.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Office16\MSOSREC.EXE	blK.exe
File opened for modification	C:\Program Files\7-Zip\7zG.exe	blK.exe
File opened for modification	C:\Program Files\Java\jdk-1.8\bin\jstatd.exe	blK.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Office16\ORGCHART.EXE	blK.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.SecHealthUI_1000.26100.1.0_x64__8wekyb3d8bbwe\SecHealthUI.exe	blK.exe
File opened for modification	C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\plug_ins\pi_brokers\64BitMAPIBroker.exe	blK.exe
File opened for modification	C:\Program Files\Google\Chrome\Application\chrome_proxy.exe	blK.exe
File opened for modification	C:\Program Files\Java\jdk-1.8\bin\javapackager.exe	blK.exe
File opened for modification	C:\Program Files\Java\jdk-1.8\bin\jmap.exe	blK.exe
File opened for modification	C:\Program Files\Java\jdk-1.8\jre\bin\orbd.exe	blK.exe
File opened for modification	C:\Program Files\Java\jre-1.8\bin\jp2launcher.exe	blK.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Office16\OLCFG.EXE	blK.exe
File opened for modification	C:\Program Files\Microsoft Office\root\vfs\ProgramFilesX86\Microsoft Office\Office16\MSOHTMED.EXE	blK.exe
File opened for modification	C:\Program Files\Java\jdk-1.8\bin\keytool.exe	blK.exe
File opened for modification	C:\Program Files\Java\jdk-1.8\bin\klist.exe	blK.exe
File opened for modification	C:\Program Files\Java\jdk-1.8\jre\bin\klist.exe	blK.exe
File opened for modification	C:\Program Files\Java\jre-1.8\bin\javaws.exe	blK.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Office16\POWERPNT.EXE	blK.exe
File opened for modification	C:\Program Files\Windows Defender Advanced Threat Protection\SenseAP.exe	blK.exe
File opened for modification	C:\Program Files\Windows Defender Advanced Threat Protection\SenseGPParser.exe	blK.exe
File opened for modification	C:\Program Files\Java\jdk-1.8\bin\kinit.exe	blK.exe
File opened for modification	C:\Program Files\VideoLAN\VLC\vlc-cache-gen.exe	blK.exe
File opened for modification	C:\Program Files\Windows Defender Advanced Threat Protection\SenseImdsCollector.exe	blK.exe
File opened for modification	C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\arh.exe	blK.exe
File opened for modification	C:\Program Files\Java\jdk-1.8\bin\wsimport.exe	blK.exe
File opened for modification	C:\Program Files\Java\jdk-1.8\jre\bin\javaws.exe	blK.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Office16\officeappguardwin32.exe	blK.exe
File opened for modification	C:\Program Files\Microsoft Office 15\ClientX64\OfficeClickToRun.exe	blK.exe
File opened for modification	C:\Program Files\7-Zip\7z.exe	blK.exe
File opened for modification	C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\LogTransport2.exe	blK.exe
File opened for modification	C:\Program Files\Java\jdk-1.8\bin\ktab.exe	blK.exe
File opened for modification	C:\Program Files\Microsoft Office\Office16\OSPPREARM.EXE	blK.exe
File opened for modification	C:\Program Files\Java\jdk-1.8\jre\bin\jabswitch.exe	blK.exe
File opened for modification	C:\Program Files\Java\jre-1.8\bin\keytool.exe	blK.exe
File opened for modification	C:\Program Files\Java\jdk-1.8\bin\servertool.exe	blK.exe
File opened for modification	C:\Program Files\Windows Mail\wab.exe	blK.exe
File opened for modification	C:\Program Files\Google\Chrome\Application\140.0.7339.81\Installer\chrmstp.exe	blK.exe
File opened for modification	C:\Program Files\Google\Chrome\Application\140.0.7339.81\Installer\setup.exe	blK.exe
File opened for modification	C:\Program Files\Java\jdk-1.8\jre\bin\tnameserv.exe	blK.exe
File opened for modification	C:\Program Files\Microsoft Office\root\vfs\ProgramFilesCommonX64\Microsoft Shared\OFFICE16\MSOXMLED.EXE	blK.exe
File opened for modification	C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\AcroBroker.exe	blK.exe
File opened for modification	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\createdump.exe	blK.exe
File opened for modification	C:\Program Files\Java\jdk-1.8\bin\native2ascii.exe	blK.exe
File opened for modification	C:\Program Files\Java\jre-1.8\bin\rmiregistry.exe	blK.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Integration\Integrator.exe	blK.exe
File opened for modification	C:\Program Files\Mozilla Firefox\default-browser-agent.exe	blK.exe
File opened for modification	C:\Program Files\Java\jdk-1.8\bin\tnameserv.exe	blK.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Office16\ADDINS\Microsoft Power Query for Excel Integrated\bin\Microsoft.Mashup.Container.exe	blK.exe
File opened for modification	C:\Program Files\Mozilla Firefox\plugin-container.exe	blK.exe
File opened for modification	C:\Program Files\Windows Defender\MpDlpCmd.exe	blK.exe
File opened for modification	C:\Program Files\Java\jdk-1.8\bin\pack200.exe	blK.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Office16\PerfBoost.exe	blK.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Office16\WORDICON.EXE	blK.exe
File opened for modification	C:\Program Files\Microsoft Office\root\vfs\ProgramFilesX86\Microsoft Office\Office16\AppSharingHookController.exe	blK.exe
File opened for modification	C:\Program Files\Microsoft Office\root\vfs\ProgramFilesX86\Microsoft Office\Office16\DCF\Common.DBConnection.exe	blK.exe
File opened for modification	C:\Program Files\VideoLAN\VLC\uninstall.exe	blK.exe
File opened for modification	C:\Program Files\Java\jdk-1.8\jre\bin\java-rmi.exe	blK.exe
File opened for modification	C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\Browser\WCChromeExtn\WCChromeNativeMessagingHost.exe	blK.exe
File opened for modification	C:\Program Files\Java\jdk-1.8\bin\jarsigner.exe	blK.exe
File opened for modification	C:\Program Files\Microsoft Office\root\vfs\ProgramFilesCommonX86\Microsoft Shared\EQUATION\eqnedt32.exe	blK.exe
File opened for modification	C:\Program Files\Mozilla Firefox\maintenanceservice_installer.exe	blK.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Executes a command shell one-liner 1 TTPs 1 IoCs

Execution of a cmd.exe one-liner (/c "close" or /k "keep") is a common script/loader stage.

execution

Windows Command Shell

T1059.003

pid	Process
5696	cmd.exe

System Location Discovery: System Language Discovery 1 TTPs 3 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	65fde5e5870f711e845eb74592c1bf784f68d6a7746101a9f6c27afaf4537e42.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	blK.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 4708 wrote to memory of 2432	4708	65fde5e5870f711e845eb74592c1bf784f68d6a7746101a9f6c27afaf4537e42.exe	88
PID 4708 wrote to memory of 1188	4708	65fde5e5870f711e845eb74592c1bf784f68d6a7746101a9f6c27afaf4537e42.exe	90
PID 4708 wrote to memory of 1188	4708	65fde5e5870f711e845eb74592c1bf784f68d6a7746101a9f6c27afaf4537e42.exe	90
PID 4708 wrote to memory of 1188	4708	65fde5e5870f711e845eb74592c1bf784f68d6a7746101a9f6c27afaf4537e42.exe	90
PID 4708 wrote to memory of 1188	4708	65fde5e5870f711e845eb74592c1bf784f68d6a7746101a9f6c27afaf4537e42.exe	90
PID 4708 wrote to memory of 1188	4708	65fde5e5870f711e845eb74592c1bf784f68d6a7746101a9f6c27afaf4537e42.exe	90
PID 4708 wrote to memory of 1188	4708	65fde5e5870f711e845eb74592c1bf784f68d6a7746101a9f6c27afaf4537e42.exe	90
PID 4708 wrote to memory of 1188	4708	65fde5e5870f711e845eb74592c1bf784f68d6a7746101a9f6c27afaf4537e42.exe	90
PID 2432 wrote to memory of 5696	2432	blK.exe	92

C:\Users\Admin\AppData\Local\Temp\65fde5e5870f711e845eb74592c1bf784f68d6a7746101a9f6c27afaf4537e42.exe
"C:\Users\Admin\AppData\Local\Temp\65fde5e5870f711e845eb74592c1bf784f68d6a7746101a9f6c27afaf4537e42.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4708
- C:\Users\Admin\AppData\Local\Temp\blK.exe
  C:\Users\Admin\AppData\Local\Temp\blK.exe
  2⤵
  - Executes dropped EXE
  - Drops file in Program Files directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2432
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\43a528ec.bat" "
    3⤵
    - Executes a command shell one-liner
    - System Location Discovery: System Language Discovery
    PID:5696
- C:\Users\Admin\AppData\Local\Temp\65fde5e5870f711e845eb74592c1bf784f68d6a7746101a9f6c27afaf4537e42.exe
  "C:\Users\Admin\AppData\Local\Temp\65fde5e5870f711e845eb74592c1bf784f68d6a7746101a9f6c27afaf4537e42.exe"
  2⤵
  PID:1188

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

Windows Command Shell

T1059.003

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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43a528ec.bat

Path C:\Users\Admin\AppData\Local\Temp\43a528ec.bat
Size 181B
SHA256 b688a162ce60e77ee8f85287a077d276c44944e77a2f7d4a5b280b8e03a3eaaf
MD5 8c57dd4f590a897756ed3d53176ad5b0
SHA1 4e280f0211f3e62c9952e9158478b811462ddfde
SHA512 3a01c9c55a9f23ccbc84c7c6c0c3038c9f6c1c019d867653a44a2b1332c62d2c9a614da438865098729425b7eb421ea76c011a6dc19cf4be9c5ea4883b93ac06
TLSH
T11BC0121182C6C6AD3455641706F5B18CC0754C683B8D6B314B31D85C61E680DB5C3701
MD5 SHA1 SHA512 TLSH

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blK.exe

Path C:\Users\Admin\AppData\Local\Temp\blK.exe
Size 15KB
SHA256 4485df22c627fa0bb899d79aa6ff29bc5be1dbc3caa2b7a490809338d54b7794
MD5 f7d21de5c4e81341eccd280c11ddcc9a
SHA1 d4e9ef10d7685d491583c6fa93ae5d9105d815bd
SHA512 e4553b86b083996038bacfb979ad0b86f578f95185d8efac34a77f6cc73e491d4f70e1449bbc9eb1d62f430800c1574101b270e1cb0eeed43a83049a79b636a3
SSDEEP 384:IXZQaD7U8iu4YsAa7ZA0UvH2lsRv21yW7GbAxur6+Y9PffPz:gQGPL4vzZq2o9W7GsxBbPr
TLSH
T1A462BFB34FC098FFC4CD353341853687CB7B4670DABA617F826288372895E19AC55495
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/1188-11-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2432-5-0x0000000000610000-0x0000000000619000-memory.dmp

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memory/2432-15-0x0000000000610000-0x0000000000619000-memory.dmp

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memory/4708-0-0x0000000000400000-0x0000000000506000-memory.dmp

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memory/4708-9-0x0000000002320000-0x00000000023B9000-memory.dmp

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memory/4708-10-0x00000000023C0000-0x00000000024DB000-memory.dmp

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memory/4708-14-0x0000000000400000-0x0000000000506000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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