juko | 102f3398fb714bfdac088488e5dcfe183d421e3d64d41bffcc31d780f9e12590

General

Target
2026-08-13_12c7f93654c9d71e44812a62b91b5783_elex_wannacry.exe
Size 105KB
Sample260813-mmcmdsfm71
SHA256 102f3398fb714bfdac088488e5dcfe183d421e3d64d41bffcc31d780f9e12590
MD5 12c7f93654c9d71e44812a62b91b5783
SHA1 5db76fb94b35d348f689dc407aa9a7ea6ba0dc66
SHA512 32ea54e6e15350aa3efb98b7a60462f5028d28d33356eb4772164d7b6f667029e312d6450e15cdc4c55f9657187200431a76e8b8606e845365f6102bf0fdc413
SSDEEP 768:lZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqiNPWQHFO:XLsF2Kerc64sTiX2IV0DpKO
TLSH
T105B32A2B2AA57052C59320B0F9591F34C43D9DB9016BB0A2F7457B6928B2D63CF71ECE
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 2 IoCs

resource	yara_rule
behavioral2/files/0x000800000001b853-4.dat	family_juko
behavioral2/files/0x000d00000001c505-10.dat	family_juko

Executes dropped EXE 2 IoCs

pid	Process
3224	WINWORD.exe
4772	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-1-5-21-2115213192-531537726-3295841909-1000\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
2216	cmd.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	2026-08-13_12c7f93654c9d71e44812a62b91b5783_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
2216	cmd.exe
5888	PING.EXE
3384	PING.EXE
2880	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
5888	PING.EXE
3384	PING.EXE
2880	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3356 wrote to memory of 3224	3356	2026-08-13_12c7f93654c9d71e44812a62b91b5783_elex_wannacry.exe	89
PID 3224 wrote to memory of 2216	3224	WINWORD.exe	90
PID 2216 wrote to memory of 5888	2216	cmd.exe	92
PID 2216 wrote to memory of 3384	2216	cmd.exe	93
PID 2216 wrote to memory of 2880	2216	cmd.exe	94
PID 2216 wrote to memory of 4772	2216	cmd.exe	95

C:\Users\Admin\AppData\Local\Temp\2026-08-13_12c7f93654c9d71e44812a62b91b5783_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-08-13_12c7f93654c9d71e44812a62b91b5783_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3356
- 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:3224
- - 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\000069C0" 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:2216
  - - 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:5888
  - - 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:3384
  - - 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:2880
  - - 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:4772

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

1

T1016

Internet Connection Discovery

1

T1016.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

000069C0

Path C:\Users\Admin\AppData\Roaming\Mozilla\000069C0
Size 105KB
SHA256 11981323059490d6aebe22d1fee71a5ea73b73ea1757c7dd6e77aa7ba4902ce2
MD5 7dbfc38dd2dffe895d09f21f97624c0c
SHA1 2f54d2111beb0978e196356251d10620e2f3fefa
SHA512 d66e1a6bd36b6ff814fcf97796322b34f24dcac725cffa9298d1404711ec854962eac6999da1af61d956a178ed756b24cf56f1a574e252368e582807550bf9e1
SSDEEP 768:lZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqiNPWQHFW:XLsF2Kerc64sTiX2IV0DpKW
TLSH
T10BB32A2B2AA57052C59320B0F9591F34C43D9DB9016BB0A2F7457B6928B2D63CF71ECE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 105KB
SHA256 102f3398fb714bfdac088488e5dcfe183d421e3d64d41bffcc31d780f9e12590
MD5 12c7f93654c9d71e44812a62b91b5783
SHA1 5db76fb94b35d348f689dc407aa9a7ea6ba0dc66
SHA512 32ea54e6e15350aa3efb98b7a60462f5028d28d33356eb4772164d7b6f667029e312d6450e15cdc4c55f9657187200431a76e8b8606e845365f6102bf0fdc413
SSDEEP 768:lZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqiNPWQHFO:XLsF2Kerc64sTiX2IV0DpKO
TLSH
T105B32A2B2AA57052C59320B0F9591F34C43D9DB9016BB0A2F7457B6928B2D63CF71ECE
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