juko | 2cb0988883010d7817614146b5081125a4a6bb5786a90998d5a15a179606224f

General

Target
2026-07-01_6fd465ada3abf19eaa7ff0acbef459e8_elex_wannacry.exe
Size 37KB
Sample260701-lftrnacy51
SHA256 2cb0988883010d7817614146b5081125a4a6bb5786a90998d5a15a179606224f
MD5 6fd465ada3abf19eaa7ff0acbef459e8
SHA1 33ce9f45cbc6d9360ebd75c707b1fd9578ce273f
SHA512 377c845fd9225814012628f12c9fea0d60ab51d64fc6007390d472391a8f5da6d94956d3cb8f88d27c3cd285ebe0aca0d790bb545e1a12f2150b1b969eb90f22
SSDEEP 768:FZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqKNPWQHpZa5ywa3:3LsF2Kerc64sTiX2IV0DhuogwU
TLSH
T199035C1A299160A2D55310B0E9D82FB4C53D8C76106BB062F740BE59A8B3CD7DF72BCE
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/5952-0-0x0000000000400000-0x000000000041D000-memory.dmp	family_juko
behavioral2/files/0x00170000000118d3-5.dat	family_juko
behavioral2/memory/5952-9-0x0000000000400000-0x000000000041D000-memory.dmp	family_juko
behavioral2/memory/5876-12-0x0000000000400000-0x000000000041D000-memory.dmp	family_juko
behavioral2/files/0x000d00000001c722-13.dat	family_juko
behavioral2/memory/5872-15-0x0000000000400000-0x000000000041D000-memory.dmp	family_juko
behavioral2/memory/5872-16-0x0000000000400000-0x000000000041D000-memory.dmp	family_juko

Executes dropped EXE 2 IoCs

pid	Process
5876	WINWORD.exe
5872	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-1-5-21-1749168396-1890032557-311772428-1000\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	2026-07-01_6fd465ada3abf19eaa7ff0acbef459e8_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
6652	PING.EXE
6076	PING.EXE
1220	PING.EXE
5460	cmd.exe

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
6652	PING.EXE
6076	PING.EXE
1220	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 5952 wrote to memory of 5876	5952	2026-07-01_6fd465ada3abf19eaa7ff0acbef459e8_elex_wannacry.exe	90
PID 5876 wrote to memory of 5460	5876	WINWORD.exe	91
PID 5460 wrote to memory of 6652	5460	cmd.exe	93
PID 5460 wrote to memory of 6076	5460	cmd.exe	94
PID 5460 wrote to memory of 1220	5460	cmd.exe	95
PID 5460 wrote to memory of 5872	5460	cmd.exe	96

C:\Users\Admin\AppData\Local\Temp\2026-07-01_6fd465ada3abf19eaa7ff0acbef459e8_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-07-01_6fd465ada3abf19eaa7ff0acbef459e8_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:5952
- 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:5876
- - 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\00002B2B" 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: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:6652
  - - 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:6076
  - - 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:1220
  - - 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:5872

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

00002B2B

Path C:\Users\Admin\AppData\Roaming\Mozilla\00002B2B
Size 37KB
SHA256 ebb34e26efa75e5ac7b2d3a8c9b4e962b871a61e373ec01580e65942f8b876c8
MD5 99db074dfc25486d936bd6ac6f9ca8a4
SHA1 4493a3ed91ec6ac604cf858d223333470fd09fc5
SHA512 ad8f31fb0cb4ebacd67d641f93d521cf5db713b19cc9675d7f7f621657f8d845c311a9e62ba805e3a93894a57bbe4b5e4fdfec75106e93965e49d5a9b4623f45
SSDEEP 768:FZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqKNPWQHpZa5ywaV:3LsF2Kerc64sTiX2IV0DhuogwK
TLSH
T15B035C1A299160A2D55310B0E9D82FB4C53D8C76106BB062F740BE59A8B3CD7DF72BCE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 37KB
SHA256 2cb0988883010d7817614146b5081125a4a6bb5786a90998d5a15a179606224f
MD5 6fd465ada3abf19eaa7ff0acbef459e8
SHA1 33ce9f45cbc6d9360ebd75c707b1fd9578ce273f
SHA512 377c845fd9225814012628f12c9fea0d60ab51d64fc6007390d472391a8f5da6d94956d3cb8f88d27c3cd285ebe0aca0d790bb545e1a12f2150b1b969eb90f22
SSDEEP 768:FZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqKNPWQHpZa5ywa3:3LsF2Kerc64sTiX2IV0DhuogwU
TLSH
T199035C1A299160A2D55310B0E9D82FB4C53D8C76106BB062F740BE59A8B3CD7DF72BCE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/5872-15-0x0000000000400000-0x000000000041D000-memory.dmp

Download

memory/5872-16-0x0000000000400000-0x000000000041D000-memory.dmp

Download

memory/5876-12-0x0000000000400000-0x000000000041D000-memory.dmp

Download

memory/5952-0-0x0000000000400000-0x000000000041D000-memory.dmp

Download

memory/5952-9-0x0000000000400000-0x000000000041D000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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Downloads