juko | ad2f768c226a1e222d7a0aefc53826a7c02336aff9f0665012a65adf24df7ebe

General

Target
2026-10-14_e6639110f22212aab3bf9c42fc3d28a8_elex_wannacry.exe
Size 57KB
Sample261014-lses9sa18t
SHA256 ad2f768c226a1e222d7a0aefc53826a7c02336aff9f0665012a65adf24df7ebe
MD5 e6639110f22212aab3bf9c42fc3d28a8
SHA1 809928af5b48c343975e34495228989d5a52e5e6
SHA512 eeca80c06cb2588dc85cfcf895fa66f471e4e1fd2cca17590cc19fcfbc674788a011dabe22539ce9853d2940ae818f9b3d6644fec45de733e2f615df20070b56
SSDEEP 1536:qLsF2Kerc64sTiX2IV0DYlNpyyCwlAY0VdTQ8:qLy2Kerc64CiGImklNUyp8T3
TLSH
T146433C16B950B072D99220B06A6D6B36417A9DF10317A1D3E7407ADD68F2FD2EF306CE
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

discovery execution 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/5908-0-0x0000000000400000-0x0000000000422000-memory.dmp	family_juko
behavioral2/files/0x000800000001b857-4.dat	family_juko
behavioral2/memory/5908-10-0x0000000000400000-0x0000000000422000-memory.dmp	family_juko
behavioral2/memory/3452-12-0x0000000000400000-0x0000000000422000-memory.dmp	family_juko
behavioral2/files/0x000f00000001c542-13.dat	family_juko
behavioral2/memory/3108-16-0x0000000000400000-0x0000000000422000-memory.dmp	family_juko
behavioral2/memory/3108-17-0x0000000000400000-0x0000000000422000-memory.dmp	family_juko

Executes dropped EXE 2 IoCs

pid	Process
3452	WINWORD.exe
3108	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-1-5-21-4154726816-2055034831-2297277433-1000\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

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
960	cmd.exe

Reads the TCP/IP host and domain name from the registry 1 TTPs 2 IoCs

The configured hostname and DNS domain identify the machine and are commonly collected to profile a host before it reports in.

discovery

System Network Configuration Discovery

T1016

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Hostname	WINWORD.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Domain	WINWORD.exe

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	2026-10-14_e6639110f22212aab3bf9c42fc3d28a8_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
6068	PING.EXE
2604	PING.EXE
960	cmd.exe
5460	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
5460	PING.EXE
6068	PING.EXE
2604	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 5908 wrote to memory of 3452	5908	2026-10-14_e6639110f22212aab3bf9c42fc3d28a8_elex_wannacry.exe	89
PID 3452 wrote to memory of 960	3452	WINWORD.exe	90
PID 960 wrote to memory of 5460	960	cmd.exe	92
PID 960 wrote to memory of 6068	960	cmd.exe	93
PID 960 wrote to memory of 2604	960	cmd.exe	94
PID 960 wrote to memory of 3108	960	cmd.exe	95

C:\Users\Admin\AppData\Local\Temp\2026-10-14_e6639110f22212aab3bf9c42fc3d28a8_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-10-14_e6639110f22212aab3bf9c42fc3d28a8_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:5908
- 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:3452
- - 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\00002153" WINWORD.exe&ping 127.0.0.1 -n 2&"C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe" \r
    3⤵
    - Executes a command shell one-liner
    - System Location Discovery: System Language Discovery
    - System Network Configuration Discovery: Internet Connection Discovery
    - Suspicious use of WriteProcessMemory
    PID:960
  - - 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:5460
  - - 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:6068
  - - 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:2604
  - - 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
      Reads the TCP/IP host and domain name from the registry
      System Location Discovery: System Language Discovery
      PID:3108

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

Windows Command Shell

1

T1059.003

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

2

T1016

Internet Connection Discovery

1

T1016.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

00002153

Path C:\Users\Admin\AppData\Roaming\Mozilla\00002153
Size 57KB
SHA256 1c4706120fcfe42aab72d9933d742d4f2ef0c0a07ab252cfd48686a5215897c2
MD5 b517accbb33378b3e48365946bac50aa
SHA1 20382047bd5c574ad49a08ac780e0714666d266e
SHA512 235226e67fdeb240dc3294f741cf9abb9db16ed6e9a2194d6a0f667031bc680f6083f080d3f705a4f6bd624c4211361ec7a594bae581a41056ef3708797c5dd9
SSDEEP 1536:qLsF2Kerc64sTiX2IV0DYlNpyyCwlAY0VdTQo:qLy2Kerc64CiGImklNUyp8Tb
TLSH
T12A433C16B950B072D99220B06A6D6B36417A9DF10317A1D3E7407ADD68F2FD2EF306CE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 57KB
SHA256 ad2f768c226a1e222d7a0aefc53826a7c02336aff9f0665012a65adf24df7ebe
MD5 e6639110f22212aab3bf9c42fc3d28a8
SHA1 809928af5b48c343975e34495228989d5a52e5e6
SHA512 eeca80c06cb2588dc85cfcf895fa66f471e4e1fd2cca17590cc19fcfbc674788a011dabe22539ce9853d2940ae818f9b3d6644fec45de733e2f615df20070b56
SSDEEP 1536:qLsF2Kerc64sTiX2IV0DYlNpyyCwlAY0VdTQ8:qLy2Kerc64CiGImklNUyp8T3
TLSH
T146433C16B950B072D99220B06A6D6B36417A9DF10317A1D3E7407ADD68F2FD2EF306CE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/3108-16-0x0000000000400000-0x0000000000422000-memory.dmp

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memory/3108-17-0x0000000000400000-0x0000000000422000-memory.dmp

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memory/3452-12-0x0000000000400000-0x0000000000422000-memory.dmp

Download

memory/5908-0-0x0000000000400000-0x0000000000422000-memory.dmp

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memory/5908-10-0x0000000000400000-0x0000000000422000-memory.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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