juko | 7ea6dc7c5106c1af98e66ecce69ae32fa5ac1a15a592722b949d598f9fa9690d

General

Target
2026-05-07_e6989730a205713f1d9d3047b1b86c5d_elex_wannacry.exe
Size 64KB
Sample260507-denv1sav5m
SHA256 7ea6dc7c5106c1af98e66ecce69ae32fa5ac1a15a592722b949d598f9fa9690d
MD5 e6989730a205713f1d9d3047b1b86c5d
SHA1 48181b37295a44cbe681a32ab1960dba9184111b
SHA512 08ace2958fdbc3b32610e034de27e764db7773a2808ee30c62deba87d2334107e82a2809bd0f4614a88195c3ed490c494675e2449fcc19cd2e8579a58f303823
SSDEEP 1536:sLsF2Kerc64sTiX2IV0DgsowGeP58ORX73iu/uE:sLy2Kerc64CiGIm8so28E
TLSH
T1EB536C2AA5A220B8C95780B0D5776B32D4397C350036767EA345FF312E71E12EB25E9E
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/0x000800000000d3f6-4.dat	family_juko
behavioral2/files/0x001a00000002b42d-14.dat	family_juko

Executes dropped EXE 2 IoCs

pid	Process
4968	WINWORD.exe
2476	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	PING.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	WINWORD.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-05-07_e6989730a205713f1d9d3047b1b86c5d_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
1052	PING.EXE
5112	cmd.exe
3588	PING.EXE
752	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
3588	PING.EXE
752	PING.EXE
1052	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3048 wrote to memory of 4968	3048	2026-05-07_e6989730a205713f1d9d3047b1b86c5d_elex_wannacry.exe	79
PID 4968 wrote to memory of 5112	4968	WINWORD.exe	80
PID 5112 wrote to memory of 3588	5112	cmd.exe	82
PID 5112 wrote to memory of 752	5112	cmd.exe	83
PID 5112 wrote to memory of 1052	5112	cmd.exe	84
PID 5112 wrote to memory of 2476	5112	cmd.exe	85

C:\Users\Admin\AppData\Local\Temp\2026-05-07_e6989730a205713f1d9d3047b1b86c5d_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-05-07_e6989730a205713f1d9d3047b1b86c5d_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3048
- 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:4968
- - 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\0000425E" 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:5112
  - - 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:3588
  - - 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:752
  - - 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:1052
  - - 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:2476

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

0000425E

Path C:\Users\Admin\AppData\Roaming\Mozilla\0000425E
Size 64KB
SHA256 b4fa20dead41a0444d91431267705db0692453532aa2b16f8c9e8ad655eab445
MD5 3b3863c50dd05830bf85d0d165a3cb74
SHA1 21586607388a127be111bbbfbfce867fb4965a75
SHA512 3cfa2a203ee8ea5495f9cd9e840e4b5d76208aeb5a6b00fe727c667b88c6d9191be913288ab261924c24edf8b956f871cff0b72ded588a07c44691207261b397
SSDEEP 1536:sLsF2Kerc64sTiX2IV0DgsowGeP58ORX73iu/uf:sLy2Kerc64CiGIm8so28f
TLSH
T19D535C2AA5A220B8C95780B0D5776B32D4397C350036767EA345FF312E71E12EB25E9E
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 64KB
SHA256 7ea6dc7c5106c1af98e66ecce69ae32fa5ac1a15a592722b949d598f9fa9690d
MD5 e6989730a205713f1d9d3047b1b86c5d
SHA1 48181b37295a44cbe681a32ab1960dba9184111b
SHA512 08ace2958fdbc3b32610e034de27e764db7773a2808ee30c62deba87d2334107e82a2809bd0f4614a88195c3ed490c494675e2449fcc19cd2e8579a58f303823
SSDEEP 1536:sLsF2Kerc64sTiX2IV0DgsowGeP58ORX73iu/uE:sLy2Kerc64CiGIm8so28E
TLSH
T1EB536C2AA5A220B8C95780B0D5776B32D4397C350036767EA345FF312E71E12EB25E9E
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/3048-11-0x00000000026F0000-0x000000000283D000-memory.dmp

Download

memory/4968-13-0x00000000026C0000-0x000000000280D000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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Downloads