38073b3230402cd1b1a696461daa1d4a1b7283af631dfe0559f219f8e0b32d28

Analysis

max time kernel
148s
max time network
151s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260709-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
02/08/2026, 11:59

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General

Target
2026-08-02_28053beab6df701b3f8c2ef842c267dc_coinminer_elex_wannacry.exe
Size 591KB
Sample260802-n5xkysak21
SHA256 38073b3230402cd1b1a696461daa1d4a1b7283af631dfe0559f219f8e0b32d28
MD5 28053beab6df701b3f8c2ef842c267dc
SHA1 cbc63452ccccbb814b584a4de91ab6ba51c00c6e
SHA512 d693cc2cd41f17bebdf40955d5a8b3b818013702b2c2a506d02a25be21b0dddc49010acfa833cb2cca1d1359a897b31aabc173fa305bc55b9459105af1c6490c
SSDEEP 6144:AhBqzw2w/0s/DbAgeonk7n7m8po+yUOKKNG0IxSjXKP+lAS:aqzw2wsEDbZ67fpLyUB/5qLl9
TLSH
T185D4AD1372E48855E1A22A32CC7663F0DEF5BEE4D9358A1F5F803A0D2933E04A6157A7
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/3952-10-0x0000000010000000-0x0000000010052000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/3952-13-0x0000000010000000-0x0000000010052000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/3952-12-0x0000000010000000-0x0000000010052000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/3952-15-0x0000000010000000-0x0000000010052000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/3952-17-0x0000000010000000-0x0000000010052000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/3952-20-0x0000000010000000-0x0000000010052000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/2812-0-0x0000000000400000-0x000000000048B000-memory.dmp	UPX
behavioral2/memory/2812-2-0x0000000000400000-0x000000000048B000-memory.dmp	UPX
behavioral2/files/0x000b000000019c8f-3.dat	UPX
behavioral2/memory/4520-7-0x0000000000400000-0x000000000048B000-memory.dmp	UPX

Deletes itself 1 IoCs

pid	Process
4520	cowyiyhs.exe

Executes dropped EXE 2 IoCs

pid	Process
4520	cowyiyhs.exe
3952	ysh.exe

Loads dropped DLL 1 IoCs

pid	Process
3952	ysh.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-1-5-21-1079202589-886135813-2527035092-1000\Software\Microsoft\Windows\CurrentVersion\Run\dtfd = "c:\\Program Files\\ttzog\\ysh.exe \"c:\\Program Files\\ttzog\\yshcp.dll\",DoAddToFavDlg"	ysh.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)	\??\q:	ysh.exe
File opened (read-only)	\??\a:	ysh.exe
File opened (read-only)	\??\d:	ysh.exe
File opened (read-only)	\??\g:	ysh.exe
File opened (read-only)	\??\h:	ysh.exe
File opened (read-only)	\??\o:	ysh.exe
File opened (read-only)	\??\v:	ysh.exe
File opened (read-only)	\??\z:	ysh.exe
File opened (read-only)	\??\b:	ysh.exe
File opened (read-only)	\??\i:	ysh.exe
File opened (read-only)	\??\k:	ysh.exe
File opened (read-only)	\??\l:	ysh.exe
File opened (read-only)	\??\p:	ysh.exe
File opened (read-only)	\??\j:	ysh.exe
File opened (read-only)	\??\m:	ysh.exe
File opened (read-only)	\??\n:	ysh.exe
File opened (read-only)	\??\s:	ysh.exe
File opened (read-only)	\??\x:	ysh.exe
File opened (read-only)	\??\y:	ysh.exe
File opened (read-only)	\??\r:	ysh.exe
File opened (read-only)	\??\t:	ysh.exe
File opened (read-only)	\??\u:	ysh.exe
File opened (read-only)	\??\w:	ysh.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	ysh.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2812-0-0x0000000000400000-0x000000000048B000-memory.dmp	upx
behavioral2/memory/2812-2-0x0000000000400000-0x000000000048B000-memory.dmp	upx
behavioral2/files/0x000b000000019c8f-3.dat	upx
behavioral2/memory/4520-7-0x0000000000400000-0x000000000048B000-memory.dmp	upx

Drops file in Program Files directory 3 IoCs

description	ioc	Process
File created	\??\c:\Program Files\ttzog\ysh.exe	cowyiyhs.exe
File opened for modification	\??\c:\Program Files\ttzog	cowyiyhs.exe
File created	\??\c:\Program Files\ttzog\yshcp.dll	cowyiyhs.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
4232	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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PING.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cowyiyhs.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	ysh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-08-02_28053beab6df701b3f8c2ef842c267dc_coinminer_elex_wannacry.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
4232	cmd.exe
3988	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 opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	ysh.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	ysh.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
3988	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
3952	ysh.exe
3952	ysh.exe
3952	ysh.exe
3952	ysh.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3952	ysh.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2812	2026-08-02_28053beab6df701b3f8c2ef842c267dc_coinminer_elex_wannacry.exe
4520	cowyiyhs.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2812 wrote to memory of 4232	2812	2026-08-02_28053beab6df701b3f8c2ef842c267dc_coinminer_elex_wannacry.exe	89
PID 4232 wrote to memory of 3988	4232	cmd.exe	91
PID 4232 wrote to memory of 4520	4232	cmd.exe	92
PID 4520 wrote to memory of 3952	4520	cowyiyhs.exe	93

C:\Users\Admin\AppData\Local\Temp\2026-08-02_28053beab6df701b3f8c2ef842c267dc_coinminer_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-08-02_28053beab6df701b3f8c2ef842c267dc_coinminer_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2812
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\cowyiyhs.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-02_28053beab6df701b3f8c2ef842c267dc_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:4232
- - 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:3988
- - C:\Users\Admin\AppData\Local\Temp\cowyiyhs.exe
    C:\Users\Admin\AppData\Local\Temp\\cowyiyhs.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-02_28053beab6df701b3f8c2ef842c267dc_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:4520
  - - \??\c:\Program Files\ttzog\ysh.exe
      "c:\Program Files\ttzog\ysh.exe" "c:\Program Files\ttzog\yshcp.dll",DoAddToFavDlg C:\Users\Admin\AppData\Local\Temp\cowyiyhs.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:3952

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

ysh.exe

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

Submit Download

cowyiyhs.exe

Path C:\Users\Admin\AppData\Local\Temp\cowyiyhs.exe
Size 592KB
SHA256 dd1a4fed6473c4151e02de91594a0ecf5d3c51e0a97d719b4ca1ba8f84c9ebd2
MD5 8ee3e1c26410bddfc4059148551dcf5c
SHA1 11d4f2466268eb5bd798162ff4e8f6bf19bcdd14
SHA512 bb34ed5f2bf4ad500e5f2a4fcc9d5d87fe9f598ff5afb4accfb3896dc9b53ef4d4bdc162e1643ac9cdfc49c22dff1ffab1311636692acce9e5a0ea40d336f34e
SSDEEP 6144:AhBqzw2w/0s/DbAgeonk7n7m8po+yUOKKNG0IxSjXKP+lAd:aqzw2wsEDbZ67fpLyUB/5qLlW
TLSH
T12ED4AD1372E48855E1A12A32CC7663F0DEF5BEE4D9358A1F5F843A0D2933E04A6157A7
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

yshcp.dll

Path \??\c:\Program Files\ttzog\yshcp.dll
Size 171KB
SHA256 2e381f3a834e24c8f76c18823367eea96019a2754948ac110dc9671a85ef646e
MD5 f3aca2f000b84b5066bf20d4f9c7adff
SHA1 19471fbbac602d9fd6fe9360247a177f9aba761c
SHA512 445a3d56a98cd116d9d4127df0eef8c67c3c3910bc60068239c7c42f4ca7a8ccffb9086145cf22709be39f4718a5abf7baa6139a3d3d2fee2d6c1f32b1638fe8
SSDEEP 3072:R2Iz9CI8mUOtDDPwLkBLXLDFkKmvzXBpLHYmmO1QezRd7UcPa1xMjM76:Rjz9X8mXGUXVPmr9mOzRd7UcPKoMW
TLSH
T1320412B0F3F98B59F0A716770831597CC97639826329237FC2889A6EAC5442FF18D764
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/2812-2-0x0000000000400000-0x000000000048B000-memory.dmp

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memory/2812-0-0x0000000000400000-0x000000000048B000-memory.dmp

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memory/3952-11-0x0000000000DD0000-0x0000000000DD2000-memory.dmp

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memory/3952-10-0x0000000010000000-0x0000000010052000-memory.dmp

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memory/3952-13-0x0000000010000000-0x0000000010052000-memory.dmp

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memory/3952-12-0x0000000010000000-0x0000000010052000-memory.dmp

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memory/3952-14-0x0000000000DD0000-0x0000000000DD2000-memory.dmp

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memory/3952-15-0x0000000010000000-0x0000000010052000-memory.dmp

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memory/3952-17-0x0000000010000000-0x0000000010052000-memory.dmp

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memory/3952-20-0x0000000010000000-0x0000000010052000-memory.dmp

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memory/4520-7-0x0000000000400000-0x000000000048B000-memory.dmp

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