juko | d2ccbff76dbdc9efab735e308dcc9656035e925422f86cf9c8a146b5bc10803a

General

Target
2026-05-11_4ce3cd23541286b053cd5966512f5584_elex_wannacry.exe
Size 30KB
Sample260511-mc7psaez9z
SHA256 d2ccbff76dbdc9efab735e308dcc9656035e925422f86cf9c8a146b5bc10803a
MD5 4ce3cd23541286b053cd5966512f5584
SHA1 f203070eb8c2a190da28ba179fab63daaea0fe78
SHA512 ed01c096a68c27bce4cf307cefb24b0fb9a6d4e7ce47b0091948cb354340e0411aa80a631e0506b9db8463f7f9bb22e9e0ea465e5438e3b2ff0c40b6ff4b7a38
SSDEEP 768:DZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqz/eNPWQHXI:tLsF2Kerc64sTiX2IV0DzloI
TLSH
T10AE26C3B7EF58052CAD701F0E9692F39C97E913A15299056DB800E4D2CB1DA2DBB1F4E
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/0x002700000002b15b-4.dat	family_juko
behavioral2/files/0x001b00000002b3e9-9.dat	family_juko

Executes dropped EXE 2 IoCs

pid	Process
1436	WINWORD.exe
3748	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-1-5-21-3119821332-640943685-2562343641-1000\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	2026-05-11_4ce3cd23541286b053cd5966512f5584_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
4892	PING.EXE
3800	PING.EXE
2220	cmd.exe
1032	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
4892	PING.EXE
3800	PING.EXE
1032	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1128 wrote to memory of 1436	1128	2026-05-11_4ce3cd23541286b053cd5966512f5584_elex_wannacry.exe	79
PID 1436 wrote to memory of 2220	1436	WINWORD.exe	80
PID 2220 wrote to memory of 1032	2220	cmd.exe	82
PID 2220 wrote to memory of 4892	2220	cmd.exe	83
PID 2220 wrote to memory of 3800	2220	cmd.exe	84
PID 2220 wrote to memory of 3748	2220	cmd.exe	85

C:\Users\Admin\AppData\Local\Temp\2026-05-11_4ce3cd23541286b053cd5966512f5584_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-05-11_4ce3cd23541286b053cd5966512f5584_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1128
- 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:1436
- - 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\00004F2A" 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:2220
  - - 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:1032
  - - 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:4892
  - - 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:3800
  - - 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:3748

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

00004F2A

Path C:\Users\Admin\AppData\Roaming\Mozilla\00004F2A
Size 30KB
SHA256 b8baca095748ab667a73a0cc3e3fc9ec2bfaab9dd2964a7c4c9e391ffaa99900
MD5 425fdd36e2e8aa11dce744496aab8a77
SHA1 ec720451e01b6078707d6ae8140be014f86c9fbc
SHA512 aee53c8df113e40776ccab106ac70848f58984a68ac5df91182b33bbb92165498f207b8d61b07c4f277a2d0a6589c23335b6dfe1e40876804af539cd1df33674
SSDEEP 768:DZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqz/eNPWQHXe:tLsF2Kerc64sTiX2IV0Dzloe
TLSH
T116E26C3B7EF58052CAD701F0E9692F39C97E913A15299056DB800E4D2CB1DA2DBB1F4E
MD5 SHA1 SHA512 SSDEEP TLSH

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WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 30KB
SHA256 d2ccbff76dbdc9efab735e308dcc9656035e925422f86cf9c8a146b5bc10803a
MD5 4ce3cd23541286b053cd5966512f5584
SHA1 f203070eb8c2a190da28ba179fab63daaea0fe78
SHA512 ed01c096a68c27bce4cf307cefb24b0fb9a6d4e7ce47b0091948cb354340e0411aa80a631e0506b9db8463f7f9bb22e9e0ea465e5438e3b2ff0c40b6ff4b7a38
SSDEEP 768:DZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqz/eNPWQHXI:tLsF2Kerc64sTiX2IV0DzloI
TLSH
T10AE26C3B7EF58052CAD701F0E9692F39C97E913A15299056DB800E4D2CB1DA2DBB1F4E
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