juko | e64b039ab31fe0675363bdd4600907ad9ca6de95c20aebe8f1b0246cd27e0b4d

General

Target
2026-08-14_ee200df8835223f588f0fef9a0a28fc9_elex_wannacry.exe
Size 87KB
Sample260814-brglcsap2v
SHA256 e64b039ab31fe0675363bdd4600907ad9ca6de95c20aebe8f1b0246cd27e0b4d
MD5 ee200df8835223f588f0fef9a0a28fc9
SHA1 fa3e297acefce5d97200a5cb17e9f495cf4270c9
SHA512 048d1a2e0367ffd2f02e89f5956f1139534f98190b7d3824da0c59631bf72163c7b2cc7647058eae0d61523eb83230e2abe8390e75f1b5770d80631fea73db91
SSDEEP 1536:2LsF2Kerc64sTiX2IV0DpK8SE9nYOzmEQkwpF:2Ly2Kerc64CiGIm1K851YO6EQkwpF
TLSH
T1CE93A1763A259190C48BD178E8155AA0B932DCF52FF71303E6417AAC59B1E13CFAE8C6
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 7 IoCs

resource	yara_rule
behavioral1/memory/3524-0-0x0000000000400000-0x0000000000425000-memory.dmp	family_juko
behavioral1/files/0x000b0000000242b6-5.dat	family_juko
behavioral1/memory/3524-11-0x0000000000400000-0x0000000000425000-memory.dmp	family_juko
behavioral1/memory/560-14-0x0000000000400000-0x0000000000425000-memory.dmp	family_juko
behavioral1/files/0x00080000000243a1-15.dat	family_juko
behavioral1/memory/1436-17-0x0000000000400000-0x0000000000425000-memory.dmp	family_juko
behavioral1/memory/1436-18-0x0000000000400000-0x0000000000425000-memory.dmp	family_juko

Checks computer location settings 2 TTPs 2 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-204488895-2999877624-296153668-1000\Control Panel\International\Geo\Nation	2026-08-14_ee200df8835223f588f0fef9a0a28fc9_elex_wannacry.exe
Key value queried	\REGISTRY\USER\S-1-5-21-204488895-2999877624-296153668-1000\Control Panel\International\Geo\Nation	WINWORD.exe

Executes dropped EXE 2 IoCs

pid	Process
560	WINWORD.exe
1436	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-1-5-21-204488895-2999877624-296153668-1000\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
2084	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	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	2026-08-14_ee200df8835223f588f0fef9a0a28fc9_elex_wannacry.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	WINWORD.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
2084	cmd.exe
4852	PING.EXE
2476	PING.EXE
2808	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
2808	PING.EXE
4852	PING.EXE
2476	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3524 wrote to memory of 560	3524	2026-08-14_ee200df8835223f588f0fef9a0a28fc9_elex_wannacry.exe	86
PID 560 wrote to memory of 2084	560	WINWORD.exe	87
PID 2084 wrote to memory of 4852	2084	cmd.exe	89
PID 2084 wrote to memory of 2476	2084	cmd.exe	90
PID 2084 wrote to memory of 2808	2084	cmd.exe	91
PID 2084 wrote to memory of 1436	2084	cmd.exe	92

C:\Users\Admin\AppData\Local\Temp\2026-08-14_ee200df8835223f588f0fef9a0a28fc9_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-08-14_ee200df8835223f588f0fef9a0a28fc9_elex_wannacry.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3524
- C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
  "C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe" -r
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:560
- - 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\000026D2" 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:2084
  - - 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:4852
  - - 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:2476
  - - 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:2808
  - - 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:1436

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

Query Registry

1

T1012

Remote System Discovery

1

T1018

System Information Discovery

2

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

000026D2

Path C:\Users\Admin\AppData\Roaming\Mozilla\000026D2
Size 87KB
SHA256 04a8e26378ea8e97258ff12a6448df1732536e848eb0ea018f3f45aaee79044d
MD5 107dc1731ea3c6f62a748ea4dbc65a65
SHA1 dd436b64854b8d78a98e43f132d13ea10ff13cdf
SHA512 32e27feb2e63de741210e754d30f33db193dc5caa0952e63cb9f4da687f0aa0d46e5c02c6144f3e61a7c116a58a2b4f959206b44b1812e09e2881041d0214b74
SSDEEP 1536:2LsF2Kerc64sTiX2IV0DpK8SE9nYOzmEQkwpa:2Ly2Kerc64CiGIm1K851YO6EQkwpa
TLSH
T18D93A1763A259190C48BD138E8155AA0B932DCF52FF71303E6417AAC59B1E13CFAE8C6
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 87KB
SHA256 e64b039ab31fe0675363bdd4600907ad9ca6de95c20aebe8f1b0246cd27e0b4d
MD5 ee200df8835223f588f0fef9a0a28fc9
SHA1 fa3e297acefce5d97200a5cb17e9f495cf4270c9
SHA512 048d1a2e0367ffd2f02e89f5956f1139534f98190b7d3824da0c59631bf72163c7b2cc7647058eae0d61523eb83230e2abe8390e75f1b5770d80631fea73db91
SSDEEP 1536:2LsF2Kerc64sTiX2IV0DpK8SE9nYOzmEQkwpF:2Ly2Kerc64CiGIm1K851YO6EQkwpF
TLSH
T1CE93A1763A259190C48BD178E8155AA0B932DCF52FF71303E6417AAC59B1E13CFAE8C6
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/560-14-0x0000000000400000-0x0000000000425000-memory.dmp

Download

memory/1436-17-0x0000000000400000-0x0000000000425000-memory.dmp

Download

memory/1436-18-0x0000000000400000-0x0000000000425000-memory.dmp

Download

memory/3524-0-0x0000000000400000-0x0000000000425000-memory.dmp

Download

memory/3524-11-0x0000000000400000-0x0000000000425000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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Downloads