42a6489bedc87796a7377bf25420e8d48863a87729789f1d0f42c432d609e9e4

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
08/08/2026, 05:02

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General

Target
2026-08-08_3f89ae8f0717ae8d53be0431b160b711_coinminer_elex_wannacry.exe
Size 590KB
Sample260808-fpfy9s1bmd
SHA256 42a6489bedc87796a7377bf25420e8d48863a87729789f1d0f42c432d609e9e4
MD5 3f89ae8f0717ae8d53be0431b160b711
SHA1 662fefb6f3e1e0019361b8183bd90da461897715
SHA512 7fa0cae69f2262bb8cc76ad728c9c7151fa2b86ec278c49ab31bf4a4ccb15990b5e8b6872900f8df4758c7e516b4e838308cb6eaf7c278a0c386b6087f112828
SSDEEP 6144:AhBqzw2w/0s/DbAgeonk7n7m8po+yUOKKNG0IxSjXKP+lAz:aqzw2wsEDbZ67fpLyUB/5qLlo
TLSH
T19BD4AD13B2E4C855E1A22A72CC7263B0DEF5BED4D9358A1F5F843A4D2933E00A7157A7
MD5 SHA1 SHA512 SSDEEP TLSH

Score

9^/10

bootkit discovery execution persistence spyware stealer upx

Malware Config

Signatures

Custom signature

Detects executables containing base64 encoded User Agent 5 IoCs

resource	yara_rule
behavioral2/memory/4636-12-0x0000000010000000-0x0000000010052000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/4636-11-0x0000000010000000-0x0000000010052000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/4636-14-0x0000000010000000-0x0000000010052000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/4636-16-0x0000000010000000-0x0000000010052000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/4636-19-0x0000000010000000-0x0000000010052000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

Custom signature

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/2624-0-0x0000000000400000-0x000000000048B000-memory.dmp	UPX
behavioral2/memory/2624-2-0x0000000000400000-0x000000000048B000-memory.dmp	UPX
behavioral2/files/0x000a000000011390-3.dat	UPX
behavioral2/memory/612-7-0x0000000000400000-0x000000000048B000-memory.dmp	UPX

Deletes itself 1 IoCs

pid	Process
612	zamek.exe

Executes dropped EXE 2 IoCs

pid	Process
612	zamek.exe
4636	krbv.exe

Loads dropped DLL 1 IoCs

pid	Process
4636	krbv.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-1-5-21-1738198120-2966725515-3980530802-1000\Software\Microsoft\Windows\CurrentVersion\Run\dtfd = "c:\\Program Files\\hotmueis\\krbv.exe \"c:\\Program Files\\hotmueis\\krbvc.dll\",DoAddToFavDlg"	krbv.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)	\??\i:	krbv.exe
File opened (read-only)	\??\l:	krbv.exe
File opened (read-only)	\??\s:	krbv.exe
File opened (read-only)	\??\t:	krbv.exe
File opened (read-only)	\??\x:	krbv.exe
File opened (read-only)	\??\a:	krbv.exe
File opened (read-only)	\??\g:	krbv.exe
File opened (read-only)	\??\j:	krbv.exe
File opened (read-only)	\??\k:	krbv.exe
File opened (read-only)	\??\o:	krbv.exe
File opened (read-only)	\??\u:	krbv.exe
File opened (read-only)	\??\z:	krbv.exe
File opened (read-only)	\??\p:	krbv.exe
File opened (read-only)	\??\q:	krbv.exe
File opened (read-only)	\??\r:	krbv.exe
File opened (read-only)	\??\v:	krbv.exe
File opened (read-only)	\??\b:	krbv.exe
File opened (read-only)	\??\m:	krbv.exe
File opened (read-only)	\??\n:	krbv.exe
File opened (read-only)	\??\w:	krbv.exe
File opened (read-only)	\??\y:	krbv.exe
File opened (read-only)	\??\d:	krbv.exe
File opened (read-only)	\??\h:	krbv.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	krbv.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2624-0-0x0000000000400000-0x000000000048B000-memory.dmp	upx
behavioral2/memory/2624-2-0x0000000000400000-0x000000000048B000-memory.dmp	upx
behavioral2/files/0x000a000000011390-3.dat	upx
behavioral2/memory/612-7-0x0000000000400000-0x000000000048B000-memory.dmp	upx

Drops file in Program Files directory 3 IoCs

description	ioc	Process
File opened for modification	\??\c:\Program Files\hotmueis	zamek.exe
File created	\??\c:\Program Files\hotmueis\krbvc.dll	zamek.exe
File created	\??\c:\Program Files\hotmueis\krbv.exe	zamek.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
2448	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	2026-08-08_3f89ae8f0717ae8d53be0431b160b711_coinminer_elex_wannacry.exe
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	zamek.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	krbv.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
2448	cmd.exe
4080	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	krbv.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	krbv.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
4080	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
4636	krbv.exe
4636	krbv.exe
4636	krbv.exe
4636	krbv.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4636	krbv.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2624	2026-08-08_3f89ae8f0717ae8d53be0431b160b711_coinminer_elex_wannacry.exe
612	zamek.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2624 wrote to memory of 2448	2624	2026-08-08_3f89ae8f0717ae8d53be0431b160b711_coinminer_elex_wannacry.exe	89
PID 2448 wrote to memory of 4080	2448	cmd.exe	91
PID 2448 wrote to memory of 612	2448	cmd.exe	92
PID 612 wrote to memory of 4636	612	zamek.exe	93

C:\Users\Admin\AppData\Local\Temp\2026-08-08_3f89ae8f0717ae8d53be0431b160b711_coinminer_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-08-08_3f89ae8f0717ae8d53be0431b160b711_coinminer_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2624
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\zamek.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-08_3f89ae8f0717ae8d53be0431b160b711_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:2448
- - 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:4080
- - C:\Users\Admin\AppData\Local\Temp\zamek.exe
    C:\Users\Admin\AppData\Local\Temp\\zamek.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-08_3f89ae8f0717ae8d53be0431b160b711_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:612
  - - \??\c:\Program Files\hotmueis\krbv.exe
      "c:\Program Files\hotmueis\krbv.exe" "c:\Program Files\hotmueis\krbvc.dll",DoAddToFavDlg C:\Users\Admin\AppData\Local\Temp\zamek.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:4636

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

krbv.exe

Path C:\Program Files\hotmueis\krbv.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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zamek.exe

Path C:\Users\Admin\AppData\Local\Temp\zamek.exe
Size 591KB
SHA256 f05f8d1e17cbd84f476e2089654d3a06a9dff030d0b91fcfa9045f2d5af7389b
MD5 c70957b7cb8d42e25576fee7c61e6b16
SHA1 b72fcfc999927bc9d9d8dc4cb313382bac8d80ad
SHA512 430186b35ca38b02d4fb5d8b61c1ede1894c5d2490de2ef897dbe75e03c7268c0fe3ab6507cd2c09992fa1b445770572c75ef0f93c761fdc85ac3301b58c020e
SSDEEP 6144:AhBqzw2w/0s/DbAgeonk7n7m8po+yUOKKNG0IxSjXKP+lAF:aqzw2wsEDbZ67fpLyUB/5qLla
TLSH
T1E3D4AD13B2E4C855E1A22A72CC7263B0DEF5BED4D9358A1F5F843A4D2933E00A7157A7
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

krbvc.dll

Path \??\c:\Program Files\hotmueis\krbvc.dll
Size 171KB
SHA256 09e68c61c8de395179901cc404ac0a48de1fd4722930220b67480ee3c63d2824
MD5 2aece7574b31740901e358900cdd66b5
SHA1 5d8cf8cfdd61095ca9ab884e20279ef5086f9ca7
SHA512 48e3de10e46ec54ff0b8a5474b10b8f14aec2067dc62156bd1304c8581da5b76fd23673df0eeb4356383a5f105b90dd12cfda43a9a5f38ea7f99d49bc0ad316c
SSDEEP 3072:R2Iz9CI8mUOtDDPwLkBLXLDFkKmvzXBpLHYmmO1QezRd7UcPa1xMjM78:Rjz9X8mXGUXVPmr9mOzRd7UcPKoMw
TLSH
T1D10412B0F3F98759F0A716B70831597CC97639826329237FC2886A6EAC5442FF18D764
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/612-7-0x0000000000400000-0x000000000048B000-memory.dmp

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memory/2624-0-0x0000000000400000-0x000000000048B000-memory.dmp

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memory/2624-2-0x0000000000400000-0x000000000048B000-memory.dmp

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memory/4636-10-0x0000000010000000-0x0000000010052000-memory.dmp

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memory/4636-13-0x00000000014D0000-0x00000000014D2000-memory.dmp

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memory/4636-12-0x0000000010000000-0x0000000010052000-memory.dmp

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memory/4636-11-0x0000000010000000-0x0000000010052000-memory.dmp

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memory/4636-14-0x0000000010000000-0x0000000010052000-memory.dmp

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memory/4636-16-0x0000000010000000-0x0000000010052000-memory.dmp

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memory/4636-19-0x0000000010000000-0x0000000010052000-memory.dmp

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