juko | bb5015a63cf0e582b686d59691b9b2685e3972f067bf25e44b404f22c24e8f73

General

Target
2026-05-04_1ecbd6cefa9cf780d214f2a99d514c8f_elex_wannacry.exe
Size 57KB
Sample260504-d2dnkabw81
SHA256 bb5015a63cf0e582b686d59691b9b2685e3972f067bf25e44b404f22c24e8f73
MD5 1ecbd6cefa9cf780d214f2a99d514c8f
SHA1 c3de6fb6a7c5d114914ebfd7e052a1a2ad0219fb
SHA512 67f410247a57d0a5db4d0a50f785f79d0ae7ee8f7b8ff40b8739fe567d7372a0cd17e4c5b8965356e5a5b22874883c86e665d7a10be981c60e282d6aa2a807b1
SSDEEP 1536:zcLsF2Kerc64sTiX2IV0DgsfrfWJF2+BD9Dmqa6:wLy2Kerc64CiGImEsoDfa6
TLSH
T1C3433913366414D1D8AB2138A4025E354BB8BDB21467F622B750BA1E1D779DACFA83CE
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/2616-0-0x0000000000400000-0x000000000041F000-memory.dmp	family_juko
behavioral2/files/0x002f00000002b19f-5.dat	family_juko
behavioral2/memory/2616-11-0x0000000000400000-0x000000000041F000-memory.dmp	family_juko
behavioral2/memory/3260-14-0x0000000000400000-0x000000000041F000-memory.dmp	family_juko
behavioral2/files/0x001d00000002b37a-15.dat	family_juko
behavioral2/memory/2480-17-0x0000000000400000-0x000000000041F000-memory.dmp	family_juko
behavioral2/memory/2480-18-0x0000000000400000-0x000000000041F000-memory.dmp	family_juko

Executes dropped EXE 2 IoCs

pid	Process
3260	WINWORD.exe
2480	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-1-5-21-1383858298-2057492509-1726743289-1000\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	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
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	2026-05-04_1ecbd6cefa9cf780d214f2a99d514c8f_elex_wannacry.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
4116	cmd.exe
5068	PING.EXE
2488	PING.EXE
4504	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
4504	PING.EXE
5068	PING.EXE
2488	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2616 wrote to memory of 3260	2616	2026-05-04_1ecbd6cefa9cf780d214f2a99d514c8f_elex_wannacry.exe	80
PID 3260 wrote to memory of 4116	3260	WINWORD.exe	81
PID 4116 wrote to memory of 5068	4116	cmd.exe	83
PID 4116 wrote to memory of 2488	4116	cmd.exe	84
PID 4116 wrote to memory of 4504	4116	cmd.exe	85
PID 4116 wrote to memory of 2480	4116	cmd.exe	86

C:\Users\Admin\AppData\Local\Temp\2026-05-04_1ecbd6cefa9cf780d214f2a99d514c8f_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-05-04_1ecbd6cefa9cf780d214f2a99d514c8f_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2616
- 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:3260
- - 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\00002AA7" 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:4116
  - - 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:5068
  - - 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:2488
  - - 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:4504
  - - 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:2480

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Remote System Discovery

1

T1018

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

System Network Configuration Discovery

1

T1016

Internet Connection Discovery

1

T1016.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

00002AA7

Path C:\Users\Admin\AppData\Roaming\Mozilla\00002AA7
Size 57KB
SHA256 487eece73cf109e9b1fb9d7186b0661a64b92743c9a1433ee944f0d0b539fa43
MD5 435a3cd363f09b9f8f0823fca10e081c
SHA1 45b4025f059247c3f438303feca51c05941e1844
SHA512 1a1bf04fc3c8dab6a92f99d437a5a0f6556cd2b9a98bc8a3772be6081011215088e1bced31773ccdd6f9d8ed7e0e5d403236655ce608ebfda6b62afcc6052bc8
SSDEEP 1536:zcLsF2Kerc64sTiX2IV0DgsfrfWJF2+BD9Dmqa8:wLy2Kerc64CiGImEsoDfa8
TLSH
T10F433913366414D1D8BB2138A4025E354BB8BDB21467F622B750BA1E1D779DACFAC3CE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 57KB
SHA256 bb5015a63cf0e582b686d59691b9b2685e3972f067bf25e44b404f22c24e8f73
MD5 1ecbd6cefa9cf780d214f2a99d514c8f
SHA1 c3de6fb6a7c5d114914ebfd7e052a1a2ad0219fb
SHA512 67f410247a57d0a5db4d0a50f785f79d0ae7ee8f7b8ff40b8739fe567d7372a0cd17e4c5b8965356e5a5b22874883c86e665d7a10be981c60e282d6aa2a807b1
SSDEEP 1536:zcLsF2Kerc64sTiX2IV0DgsfrfWJF2+BD9Dmqa6:wLy2Kerc64CiGImEsoDfa6
TLSH
T1C3433913366414D1D8AB2138A4025E354BB8BDB21467F622B750BA1E1D779DACFA83CE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/2480-17-0x0000000000400000-0x000000000041F000-memory.dmp

Download

memory/2480-18-0x0000000000400000-0x000000000041F000-memory.dmp

Download

memory/2616-0-0x0000000000400000-0x000000000041F000-memory.dmp

Download

memory/2616-11-0x0000000000400000-0x000000000041F000-memory.dmp

Download

memory/3260-14-0x0000000000400000-0x000000000041F000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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Downloads