juko | d0169026414112db7e546f35b574bb4d0977985711220fdbfc48bf8f4d8f3231

General

Target
2026-07-01_3392519b8d0425d64d71be4672b21fba_elex_wannacry.exe
Size 87KB
Sample260701-pawkvafv8z
SHA256 d0169026414112db7e546f35b574bb4d0977985711220fdbfc48bf8f4d8f3231
MD5 3392519b8d0425d64d71be4672b21fba
SHA1 cefdee4cef05a7c136eb3d0d0e1b9299f412cfd8
SHA512 dc19e6d6f975bb8eec3dc5c85ad3fed49f811ff6440cadd4c4ec9822e2c1ab29bb5aed60885bc54a710bef12ab41bc9c2a3805ca1772b4af6489252df8742a6e
SSDEEP 1536:2LsF2Kerc64sTiX2IV0DpK8SE9nYOzmEQkwpZ:2Ly2Kerc64CiGIm1K851YO6EQkwpZ
TLSH
T1C893A1763A259190C48BD178E8155AA0B932DCF52FF71303E6417AAC59B1E13CFAE8C6
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
behavioral1/memory/3976-0-0x0000000000400000-0x0000000000425000-memory.dmp	family_juko
behavioral1/files/0x000b00000002433e-6.dat	family_juko
behavioral1/memory/3976-11-0x0000000000400000-0x0000000000425000-memory.dmp	family_juko
behavioral1/memory/5068-14-0x0000000000400000-0x0000000000425000-memory.dmp	family_juko
behavioral1/files/0x000900000002447b-15.dat	family_juko
behavioral1/memory/3844-17-0x0000000000400000-0x0000000000425000-memory.dmp	family_juko
behavioral1/memory/3844-18-0x0000000000400000-0x0000000000425000-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	2026-07-01_3392519b8d0425d64d71be4672b21fba_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
5068	WINWORD.exe
3844	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

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	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_3392519b8d0425d64d71be4672b21fba_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

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
1336	cmd.exe
4736	PING.EXE
764	PING.EXE
2584	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
764	PING.EXE
2584	PING.EXE
4736	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3976 wrote to memory of 5068	3976	2026-07-01_3392519b8d0425d64d71be4672b21fba_elex_wannacry.exe	88
PID 5068 wrote to memory of 1336	5068	WINWORD.exe	89
PID 1336 wrote to memory of 4736	1336	cmd.exe	91
PID 1336 wrote to memory of 764	1336	cmd.exe	94
PID 1336 wrote to memory of 2584	1336	cmd.exe	95
PID 1336 wrote to memory of 3844	1336	cmd.exe	96

C:\Users\Admin\AppData\Local\Temp\2026-07-01_3392519b8d0425d64d71be4672b21fba_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-07-01_3392519b8d0425d64d71be4672b21fba_elex_wannacry.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3976
- 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:5068
- - 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\000059D9" 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:1336
  - - 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:4736
  - - 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:764
  - - 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:2584
  - - 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:3844

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

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

000059D9

Path C:\Users\Admin\AppData\Roaming\Mozilla\000059D9
Size 87KB
SHA256 eb2257ed1559148787907e6845e372caa063dd6f3ad9d48ab48d712aa486452e
MD5 ca65091370d0f0f8660002dcbc1a9b11
SHA1 d73855c0fedd687a11af0303fb0dd9c5e5d10829
SHA512 7ee02cdea9cc7de6ac6d21c3c224f016d73b4923ef44622d478afd3ad53eef006d5ebd4e47a1faca72e7aee917a9d3faf9a559b248f31722c69d6ee453a0c910
SSDEEP 1536:2LsF2Kerc64sTiX2IV0DpK8SE9nYOzmEQkwpB:2Ly2Kerc64CiGIm1K851YO6EQkwpB
TLSH
T1AA93A1763A259190C48BD178E8155AA0B932DCF52FF71303E6417AAC59B1E13CFAE8C6
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 87KB
SHA256 d0169026414112db7e546f35b574bb4d0977985711220fdbfc48bf8f4d8f3231
MD5 3392519b8d0425d64d71be4672b21fba
SHA1 cefdee4cef05a7c136eb3d0d0e1b9299f412cfd8
SHA512 dc19e6d6f975bb8eec3dc5c85ad3fed49f811ff6440cadd4c4ec9822e2c1ab29bb5aed60885bc54a710bef12ab41bc9c2a3805ca1772b4af6489252df8742a6e
SSDEEP 1536:2LsF2Kerc64sTiX2IV0DpK8SE9nYOzmEQkwpZ:2Ly2Kerc64CiGIm1K851YO6EQkwpZ
TLSH
T1C893A1763A259190C48BD178E8155AA0B932DCF52FF71303E6417AAC59B1E13CFAE8C6
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/3844-17-0x0000000000400000-0x0000000000425000-memory.dmp

Download

memory/3844-18-0x0000000000400000-0x0000000000425000-memory.dmp

Download

memory/3976-0-0x0000000000400000-0x0000000000425000-memory.dmp

Download

memory/3976-11-0x0000000000400000-0x0000000000425000-memory.dmp

Download

memory/5068-14-0x0000000000400000-0x0000000000425000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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Downloads