juko | 62388157bdc0b6a0a04fadd8b958b9b19a293ac18e7d36cd930eddbb5d1026b3

General

Target
2026-05-19_79ce8fef42f7cdbbf3552b03a8936392_elex_wannacry.exe
Size 64KB
Sample260519-thbb4abt7n
SHA256 62388157bdc0b6a0a04fadd8b958b9b19a293ac18e7d36cd930eddbb5d1026b3
MD5 79ce8fef42f7cdbbf3552b03a8936392
SHA1 16749812875fe7df1cdfaf4779cd57093f1a3c2b
SHA512 90652b7a9a787d9795c2913749065c713317358dfc0bb1de21269c13f9239555a9f7764d3a749d49d15f34b68686404e9cdc1c5577dd90b999b4e1abfb411bfe
SSDEEP 1536:sLsF2Kerc64sTiX2IV0DgsowGeP58ORX73iu/uI:sLy2Kerc64CiGIm8so28I
TLSH
T106536C2AA5A220B8C95780B0D5776B32D4397C350036767EA345FF312E71E12EB25E9E
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 2 IoCs

resource	yara_rule
behavioral2/files/0x000800000000d416-4.dat	family_juko
behavioral2/files/0x001b00000002b5ec-12.dat	family_juko

Executes dropped EXE 2 IoCs

pid	Process
2556	WINWORD.exe
4420	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-1-5-21-2409539145-3342400454-2096821238-1000\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	2026-05-19_79ce8fef42f7cdbbf3552b03a8936392_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
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
2328	cmd.exe
3788	PING.EXE
4788	PING.EXE
4256	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
3788	PING.EXE
4788	PING.EXE
4256	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2332 wrote to memory of 2556	2332	2026-05-19_79ce8fef42f7cdbbf3552b03a8936392_elex_wannacry.exe	80
PID 2556 wrote to memory of 2328	2556	WINWORD.exe	81
PID 2328 wrote to memory of 3788	2328	cmd.exe	83
PID 2328 wrote to memory of 4788	2328	cmd.exe	84
PID 2328 wrote to memory of 4256	2328	cmd.exe	85
PID 2328 wrote to memory of 4420	2328	cmd.exe	86

C:\Users\Admin\AppData\Local\Temp\2026-05-19_79ce8fef42f7cdbbf3552b03a8936392_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-05-19_79ce8fef42f7cdbbf3552b03a8936392_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2332
- 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:2556
- - 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\00006D24" 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:2328
  - - 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:3788
  - - 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:4788
  - - 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:4256
  - - 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:4420

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

00006D24

Path C:\Users\Admin\AppData\Roaming\Mozilla\00006D24
Size 64KB
SHA256 996ba85bdb4cf13077c405c1c5bc9aaf7208f52f9e0bf54dd5e326bdbcbe9331
MD5 7691600badf4d58256ea7aee16d3da0f
SHA1 fc7b8cf88446da810525e98a35b37dde5c5e7b63
SHA512 e8d9038b27807fd9815b739e091bcb84c22c8f1793b00588dcffe18d3bcbb82428f312a78f5c1920c7b29d2b93e9d5c5e6ff528ea6e70496ce7b74aa6c66309c
SSDEEP 1536:sLsF2Kerc64sTiX2IV0DgsowGeP58ORX73iu/ug:sLy2Kerc64CiGIm8so28g
TLSH
T115535C2AA5A220B8C95780B0D5776B32D4397C350036767EA345FF312E71E12EB25E9E
MD5 SHA1 SHA512 SSDEEP TLSH

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WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 64KB
SHA256 62388157bdc0b6a0a04fadd8b958b9b19a293ac18e7d36cd930eddbb5d1026b3
MD5 79ce8fef42f7cdbbf3552b03a8936392
SHA1 16749812875fe7df1cdfaf4779cd57093f1a3c2b
SHA512 90652b7a9a787d9795c2913749065c713317358dfc0bb1de21269c13f9239555a9f7764d3a749d49d15f34b68686404e9cdc1c5577dd90b999b4e1abfb411bfe
SSDEEP 1536:sLsF2Kerc64sTiX2IV0DgsowGeP58ORX73iu/uI:sLy2Kerc64CiGIm8so28I
TLSH
T106536C2AA5A220B8C95780B0D5776B32D4397C350036767EA345FF312E71E12EB25E9E
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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Downloads