25a81ff2bda00d408baa44aa1c700cfd43a407860b2b45becc71fbd8d8695025

Analysis

max time kernel
150s
max time network
156s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260709-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
19/08/2026, 07:50

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General

Target
2026-08-19_d63472b2cb602001dfd055b85dde8232_coinminer_elex_wannacry.exe
Size 580KB
Sample260819-jpblbsdg96
SHA256 25a81ff2bda00d408baa44aa1c700cfd43a407860b2b45becc71fbd8d8695025
MD5 d63472b2cb602001dfd055b85dde8232
SHA1 9930ec9e4506b71d02ed8422e52b955ec9a7d230
SHA512 41458bcd71e3cf7547ecb9090b6d36d0b536d245e827c7056b067414645f8d94ee5623bd65692e05ef4ec78ed694e226958fb6b4db7be2ac2e81bb7cdcbbc717
SSDEEP 6144:AhBqzw2w/0s/DbAgeonk7n7m8po+yUOKKNG0IxSjXKP+lAPQ:aqzw2wsEDbZ67fpLyUB/5qLlEQ
TLSH
T10EC4AD13B2E0C855E1A22A72CC7667B0DEF5BED4D9358A1F5F843A0D2833E04E6157A7
MD5 SHA1 SHA512 SSDEEP TLSH

Score

9^/10

bootkit discovery execution persistence spyware stealer upx

Malware Config

Signatures

Detects executables containing base64 encoded User Agent 6 IoCs

resource	yara_rule
behavioral2/memory/5244-12-0x0000000010000000-0x0000000010052000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/5244-10-0x0000000010000000-0x0000000010052000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/5244-13-0x0000000010000000-0x0000000010052000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/5244-15-0x0000000010000000-0x0000000010052000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/5244-17-0x0000000010000000-0x0000000010052000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/5244-20-0x0000000010000000-0x0000000010052000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/3384-0-0x0000000000400000-0x000000000048B000-memory.dmp	UPX
behavioral2/memory/3384-2-0x0000000000400000-0x000000000048B000-memory.dmp	UPX
behavioral2/files/0x00180000000118e0-3.dat	UPX
behavioral2/memory/6388-7-0x0000000000400000-0x000000000048B000-memory.dmp	UPX

Deletes itself 1 IoCs

pid	Process
6388	bgujb.exe

Executes dropped EXE 2 IoCs

pid	Process
6388	bgujb.exe
5244	yst.exe

Loads dropped DLL 1 IoCs

pid	Process
5244	yst.exe

Reads user/profile data of web browsers 3 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

Credentials from Web Browsers
T1555.003

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1014449518-1831897916-4205727055-1000\Software\Microsoft\Windows\CurrentVersion\Run\dtfd = "c:\\Program Files\\hloffoagi\\yst.exe \"c:\\Program Files\\hloffoagi\\ystdj.dll\",DoAddToFavDlg"	yst.exe

Enumerates connected drives 3 TTPs 23 IoCs

Attempts to read the root path of hard drives other than the default C: drive.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

description	ioc	Process
File opened (read-only)	\??\u:	yst.exe
File opened (read-only)	\??\x:	yst.exe
File opened (read-only)	\??\m:	yst.exe
File opened (read-only)	\??\t:	yst.exe
File opened (read-only)	\??\v:	yst.exe
File opened (read-only)	\??\l:	yst.exe
File opened (read-only)	\??\o:	yst.exe
File opened (read-only)	\??\r:	yst.exe
File opened (read-only)	\??\w:	yst.exe
File opened (read-only)	\??\y:	yst.exe
File opened (read-only)	\??\z:	yst.exe
File opened (read-only)	\??\a:	yst.exe
File opened (read-only)	\??\b:	yst.exe
File opened (read-only)	\??\d:	yst.exe
File opened (read-only)	\??\h:	yst.exe
File opened (read-only)	\??\i:	yst.exe
File opened (read-only)	\??\j:	yst.exe
File opened (read-only)	\??\q:	yst.exe
File opened (read-only)	\??\s:	yst.exe
File opened (read-only)	\??\g:	yst.exe
File opened (read-only)	\??\k:	yst.exe
File opened (read-only)	\??\n:	yst.exe
File opened (read-only)	\??\p:	yst.exe

Writes to the Master Boot Record (MBR) 1 TTPs 1 IoCs

Bootkits write to the MBR to gain persistence at a level below the operating system.

bootkit persistence

Bootkit

T1542.003

description	ioc	Process
File opened for modification	\??\PHYSICALDRIVE0	yst.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3384-0-0x0000000000400000-0x000000000048B000-memory.dmp	upx
behavioral2/memory/3384-2-0x0000000000400000-0x000000000048B000-memory.dmp	upx
behavioral2/files/0x00180000000118e0-3.dat	upx
behavioral2/memory/6388-7-0x0000000000400000-0x000000000048B000-memory.dmp	upx

Drops file in Program Files directory 3 IoCs

description	ioc	Process
File created	\??\c:\Program Files\hloffoagi\yst.exe	bgujb.exe
File opened for modification	\??\c:\Program Files\hloffoagi	bgujb.exe
File created	\??\c:\Program Files\hloffoagi\ystdj.dll	bgujb.exe

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
4804	cmd.exe

System Location Discovery: System Language Discovery 1 TTPs 5 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	PING.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	bgujb.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	yst.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-08-19_d63472b2cb602001dfd055b85dde8232_coinminer_elex_wannacry.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 2 IoCs

Adversaries may check for Internet connectivity on compromised systems.

discovery

Internet Connection Discovery

T1016.001

pid	Process
4804	cmd.exe
6344	PING.EXE

Checks processor information in registry 2 TTPs 2 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	yst.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	yst.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
6344	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
5244	yst.exe
5244	yst.exe
5244	yst.exe
5244	yst.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	5244	yst.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
3384	2026-08-19_d63472b2cb602001dfd055b85dde8232_coinminer_elex_wannacry.exe
6388	bgujb.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 3384 wrote to memory of 4804	3384	2026-08-19_d63472b2cb602001dfd055b85dde8232_coinminer_elex_wannacry.exe	91
PID 4804 wrote to memory of 6344	4804	cmd.exe	93
PID 4804 wrote to memory of 6388	4804	cmd.exe	94
PID 6388 wrote to memory of 5244	6388	bgujb.exe	95

C:\Users\Admin\AppData\Local\Temp\2026-08-19_d63472b2cb602001dfd055b85dde8232_coinminer_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-08-19_d63472b2cb602001dfd055b85dde8232_coinminer_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3384
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\bgujb.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-19_d63472b2cb602001dfd055b85dde8232_coinminer_elex_wannacry.exe"
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:4804
- - C:\Windows\SysWOW64\PING.EXE
    ping 127.0.0.1 -n 2
    3⤵
    - System Location Discovery: System Language Discovery
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:6344
- - C:\Users\Admin\AppData\Local\Temp\bgujb.exe
    C:\Users\Admin\AppData\Local\Temp\\bgujb.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-19_d63472b2cb602001dfd055b85dde8232_coinminer_elex_wannacry.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - Drops file in Program Files directory
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:6388
  - - \??\c:\Program Files\hloffoagi\yst.exe
      "c:\Program Files\hloffoagi\yst.exe" "c:\Program Files\hloffoagi\ystdj.dll",DoAddToFavDlg C:\Users\Admin\AppData\Local\Temp\bgujb.exe
      4⤵
      Executes dropped EXE
      Loads dropped DLL
      Adds Run key to start application
      Enumerates connected drives
      Writes to the Master Boot Record (MBR)
      System Location Discovery: System Language Discovery
      Checks processor information in registry
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:5244

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

Windows Command Shell

T1059.003

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Pre-OS Boot

T1542

Bootkit

T1542.003

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Pre-OS Boot

T1542

Bootkit

T1542.003

Credential Access

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Peripheral Device Discovery

T1120

Query Registry

T1012

Remote System Discovery

T1018

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

System Network Configuration Discovery

T1016

Internet Connection Discovery

T1016.001

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

yst.exe

Path C:\Program Files\hloffoagi\yst.exe
Size 51KB
SHA256 ce6bb7eddc83762c708d4a41709ae00371dbdc09b2a380f28fa60b1edf917473
MD5 2e068ce2770fde8d1af4cb114b98df1f
SHA1 b6f9c2775babb025b22f915c3047aa627d07c312
SHA512 998d695eb56375e63df7db16740b89deb2cf630ccbead8bcf84a921ec6f4a4f9aef2755b703f7190f332b2008ebcc949363bcf8f392d7d07246c255b5073ed35
SSDEEP 1536:6G9yoVEpHP29I3fbcJboSUge5N+CnC/maz9Rh:8pv2mbcJboce58wvOR
TLSH
T137336C236A0A49B3DFE231780A9D7232526DD862075541F7A61057EAFD243E2EE743CF
MD5 SHA1 SHA512 SSDEEP TLSH

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bgujb.exe

Path C:\Users\Admin\AppData\Local\Temp\bgujb.exe
Size 580KB
SHA256 00bdd063b41d9ecac8795a3865eda626f72aa4636acc59111ce7d9d3a68a355f
MD5 c7234d801048391d17d2805b77f80407
SHA1 58fba19261155e67e4bc2bc124326071860f80ae
SHA512 88aafc9884cc38d74923c3bcc79ecd5290f14e7487bb85eec5ca6c98800fc239ec66ac37adefc6c41b018ccb719cf21c0373ebadb56e8bc8dd81879ebe61d499
SSDEEP 6144:AhBqzw2w/0s/DbAgeonk7n7m8po+yUOKKNG0IxSjXKP+lAP8:aqzw2wsEDbZ67fpLyUB/5qLlE8
TLSH
T1FEC4AD13B2E0C855E1A22A72CC7667B0DEF5BED4D9358A1F5F843A0D2833E04E6157A7
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

ystdj.dll

Path \??\c:\Program Files\hloffoagi\ystdj.dll
Size 171KB
SHA256 a5e554718dbac8ce475356d4769a269143ed1b0aed4404e8b3c6a316d0d575c1
MD5 1f4e281a3d8e793eda9b2247b9e9d036
SHA1 446a4edb57805ef78aa57cb53e7c529b6c6f19f5
SHA512 dc4ceb4e08f4e53f9ef4865e90c10250d34ce301b62bfbad393a18716e6eb3eb07a2cb079bb439757ae27aa225ee34fc76b11bacdff07f0d7fa919ea7ffe6bfd
SSDEEP 3072:R2Iz9CI8mUOtDDPwLkBLXLDFkKmvzXBpLHYmmO1QezRd7UcPa1xMjM76:Rjz9X8mXGUXVPmr9mOzRd7UcPKoM2
TLSH
T18C0412B0F3F98B59F0A716770831997CC97639826329237FC2885A6EAC5442FF18D764
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/3384-2-0x0000000000400000-0x000000000048B000-memory.dmp

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memory/3384-0-0x0000000000400000-0x000000000048B000-memory.dmp

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memory/5244-12-0x0000000010000000-0x0000000010052000-memory.dmp

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memory/5244-11-0x0000000001650000-0x0000000001652000-memory.dmp

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memory/5244-10-0x0000000010000000-0x0000000010052000-memory.dmp

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memory/5244-13-0x0000000010000000-0x0000000010052000-memory.dmp

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memory/5244-14-0x0000000001650000-0x0000000001652000-memory.dmp

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memory/5244-15-0x0000000010000000-0x0000000010052000-memory.dmp

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memory/5244-17-0x0000000010000000-0x0000000010052000-memory.dmp

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memory/5244-20-0x0000000010000000-0x0000000010052000-memory.dmp

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memory/6388-7-0x0000000000400000-0x000000000048B000-memory.dmp

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