juko | 2080387712c226a4fef93b52edeb1dcd5341e5302a64251fde5312723f7be733

Analysis

max time kernel
149s
max time network
142s
platform
windows11-21h2_x64
resource
win11-20260130-en
resource tags

arch:x64arch:x86image:win11-20260130-enlocale:en-usos:windows11-21h2-x64systemwindows
submitted
22/04/2026, 03:13

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General

Target
2026-04-22_10a54f11b747e96a7bcffed4cb62c52c_elex_wannacry.exe
Size 49KB
Sample260422-dqwd8sf14m
SHA256 2080387712c226a4fef93b52edeb1dcd5341e5302a64251fde5312723f7be733
MD5 10a54f11b747e96a7bcffed4cb62c52c
SHA1 af653cc3f218012c9954a69bbe70f3b98c0b6324
SHA512 fccdc767dab196b572e092319dd64d6309e746bd8e3fef5fe6dc03b24294089d437268e11a38517c45f927dc72581f08645d5a44ac978923d134dbe18f065151
SSDEEP 1536:VLsF2Kerc64sTiX2IV0Dhuj4p4kojVR6h23:VLy2Kerc64CiGImVu8p4kojWh23
TLSH
T129334C0A2BD650C2D56205B0E99A0F75833FDC3A2127A75EE740765A1C72D6BCF30E9E
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

discovery juko persistence trojan

Malware Config

Signatures

Family: Juko
Juko is a trojan written in C++.
trojan juko

Detects Juko 7 IoCs

resource	yara_rule
behavioral2/memory/2188-0-0x0000000000400000-0x0000000000420000-memory.dmp	family_juko
behavioral2/files/0x002900000002b23d-5.dat	family_juko
behavioral2/memory/2188-13-0x0000000000400000-0x0000000000420000-memory.dmp	family_juko
behavioral2/memory/5916-16-0x0000000000400000-0x0000000000420000-memory.dmp	family_juko
behavioral2/files/0x001a00000002b4c8-17.dat	family_juko
behavioral2/memory/5564-19-0x0000000000400000-0x0000000000420000-memory.dmp	family_juko
behavioral2/memory/5564-21-0x0000000000400000-0x0000000000420000-memory.dmp	family_juko

Executes dropped EXE 2 IoCs

pid	Process
5916	WINWORD.exe
5564	WINWORD.exe

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-1-5-21-2122505878-652277452-2375749442-1000\Software\Microsoft\Windows\CurrentVersion\Run\WINWORD = "C:\\Users\\Admin\\AppData\\Roaming\\Mozilla\\WINWORD.exe -r"	WINWORD.exe

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 7 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	WINWORD.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-04-22_10a54f11b747e96a7bcffed4cb62c52c_elex_wannacry.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	WINWORD.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	PING.EXE

System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 4 IoCs

Adversaries may check for Internet connectivity on compromised systems.

discovery

Internet Connection Discovery

T1016.001

pid	Process
5264	cmd.exe
5392	PING.EXE
5348	PING.EXE
5568	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
5392	PING.EXE
5348	PING.EXE
5568	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2188 wrote to memory of 5916	2188	2026-04-22_10a54f11b747e96a7bcffed4cb62c52c_elex_wannacry.exe	80
PID 5916 wrote to memory of 5264	5916	WINWORD.exe	81
PID 5264 wrote to memory of 5392	5264	cmd.exe	83
PID 5264 wrote to memory of 5348	5264	cmd.exe	84
PID 5264 wrote to memory of 5568	5264	cmd.exe	85
PID 5264 wrote to memory of 5564	5264	cmd.exe	86

C:\Users\Admin\AppData\Local\Temp\2026-04-22_10a54f11b747e96a7bcffed4cb62c52c_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-04-22_10a54f11b747e96a7bcffed4cb62c52c_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2188
- C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
  "C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe" -r
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:5916
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c ping 127.0.0.1 -n 2&del "C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe"&ping 127.0.0.1 -n 2&rename "C:\Users\Admin\AppData\Roaming\Mozilla\000024B7" WINWORD.exe&ping 127.0.0.1 -n 2&"C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe" \r
    3⤵
    - System Location Discovery: System Language Discovery
    - System Network Configuration Discovery: Internet Connection Discovery
    - Suspicious use of WriteProcessMemory
    PID:5264
  - - C:\Windows\SysWOW64\PING.EXE
      ping 127.0.0.1 -n 2
      4⤵
      System Location Discovery: System Language Discovery
      System Network Configuration Discovery: Internet Connection Discovery
      Runs ping.exe
      PID:5392
  - - C:\Windows\SysWOW64\PING.EXE
      ping 127.0.0.1 -n 2
      4⤵
      System Location Discovery: System Language Discovery
      System Network Configuration Discovery: Internet Connection Discovery
      Runs ping.exe
      PID:5348
  - - C:\Windows\SysWOW64\PING.EXE
      ping 127.0.0.1 -n 2
      4⤵
      System Location Discovery: System Language Discovery
      System Network Configuration Discovery: Internet Connection Discovery
      Runs ping.exe
      PID:5568
  - - C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
      "C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe" \r
      4⤵
      Executes dropped EXE
      Adds Run key to start application
      System Location Discovery: System Language Discovery
      PID:5564

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

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

Command and Control

Exfiltration

Impact

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Downloads

000024B7

Path C:\Users\Admin\AppData\Roaming\Mozilla\000024B7
Size 49KB
SHA256 e6b1f48653871d14e94fe974658162a325c7f6d8b97d82c5a33d6b431287751a
MD5 73b008920b5263f918343dc6dce0e0aa
SHA1 7ab4e193bbbaa371d72aaf9fcc4017ba521ee04e
SHA512 65f2268ed9cf5b1ff86ad02ea4370c4e751d1d09e7a4e9419f5d32046c0eefb1ddf11a351ad0d8f5dbf4c646792f7ccd48972e05cf0a0e7e529d751102da21a1
SSDEEP 1536:VLsF2Kerc64sTiX2IV0Dhuj4p4kojVR6h29:VLy2Kerc64CiGImVu8p4kojWh29
TLSH
T1E4334C0A2BD650C2D56205B0E99A0F75833FDC3A2127A75EE740765A1C72D6BCF30E9E
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 49KB
SHA256 2080387712c226a4fef93b52edeb1dcd5341e5302a64251fde5312723f7be733
MD5 10a54f11b747e96a7bcffed4cb62c52c
SHA1 af653cc3f218012c9954a69bbe70f3b98c0b6324
SHA512 fccdc767dab196b572e092319dd64d6309e746bd8e3fef5fe6dc03b24294089d437268e11a38517c45f927dc72581f08645d5a44ac978923d134dbe18f065151
SSDEEP 1536:VLsF2Kerc64sTiX2IV0Dhuj4p4kojVR6h23:VLy2Kerc64CiGImVu8p4kojWh23
TLSH
T129334C0A2BD650C2D56205B0E99A0F75833FDC3A2127A75EE740765A1C72D6BCF30E9E
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/2188-0-0x0000000000400000-0x0000000000420000-memory.dmp

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memory/2188-12-0x00000000009E0000-0x0000000000A5A000-memory.dmp

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memory/2188-13-0x0000000000400000-0x0000000000420000-memory.dmp

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memory/5564-19-0x0000000000400000-0x0000000000420000-memory.dmp

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memory/5564-20-0x00000000009D0000-0x0000000000A4A000-memory.dmp

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memory/5564-21-0x0000000000400000-0x0000000000420000-memory.dmp

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memory/5916-15-0x00000000008A0000-0x000000000091A000-memory.dmp

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memory/5916-16-0x0000000000400000-0x0000000000420000-memory.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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Downloads