juko | c022e292ee7d38bf2c2f31485f5ea9d0ba584b4de134753c2cc08aa5f11370ee

General

Target
2026-08-30_30875ceeccb567d980f7acb1361a779f_elex_wannacry.exe
Size 32KB
Sample260901-edfcxssdpc
SHA256 c022e292ee7d38bf2c2f31485f5ea9d0ba584b4de134753c2cc08aa5f11370ee
MD5 30875ceeccb567d980f7acb1361a779f
SHA1 9bc7a8b769ab0eaa713078a81cd0b92559ad0c3c
SHA512 6b0d297bc13382adf493d5067ba75b30e8afc0c325cab9e307f3ad228259f931cdab21564fed75c16a6eede641e09dad49c5c0427d71d5c6b66a775a3647e6e1
SSDEEP 768:qZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqKNPWQHpk:OLsF2Kerc64sTiX2IV0Dhuk
TLSH
T15AE23A1B2AA17052C59320B0FA991F34C57D4CB6116BB066FB417B6928B2D63CFB0DCE
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 2 IoCs

resource	yara_rule
behavioral1/files/0x000b000000024384-4.dat	family_juko
behavioral1/files/0x000900000002453a-12.dat	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-1-5-21-2370214745-1838013427-2987045292-1000\Control Panel\International\Geo\Nation	2026-08-30_30875ceeccb567d980f7acb1361a779f_elex_wannacry.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2370214745-1838013427-2987045292-1000\Control Panel\International\Geo\Nation	WINWORD.exe

Executes dropped EXE 2 IoCs

pid	Process
4400	WINWORD.exe
3104	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-1-5-21-2370214745-1838013427-2987045292-1000\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
4708	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	2026-08-30_30875ceeccb567d980f7acb1361a779f_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
4708	cmd.exe
4260	PING.EXE
2320	PING.EXE
1276	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
4260	PING.EXE
2320	PING.EXE
1276	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4032 wrote to memory of 4400	4032	2026-08-30_30875ceeccb567d980f7acb1361a779f_elex_wannacry.exe	85
PID 4400 wrote to memory of 4708	4400	WINWORD.exe	86
PID 4708 wrote to memory of 4260	4708	cmd.exe	88
PID 4708 wrote to memory of 2320	4708	cmd.exe	89
PID 4708 wrote to memory of 1276	4708	cmd.exe	90
PID 4708 wrote to memory of 3104	4708	cmd.exe	91

C:\Users\Admin\AppData\Local\Temp\2026-08-30_30875ceeccb567d980f7acb1361a779f_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-08-30_30875ceeccb567d980f7acb1361a779f_elex_wannacry.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4032
- 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:4400
- - 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\00006D42" 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:4708
  - - 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:4260
  - - 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:2320
  - - 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:1276
  - - 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:3104

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

00006D42

Path C:\Users\Admin\AppData\Roaming\Mozilla\00006D42
Size 32KB
SHA256 5b1f5533f37622a2e675a131f8e0048d71d9d606485cbf6e114ec92da9273654
MD5 ece4fa2ece6d975566873ff833966d11
SHA1 60e5ef438d3897a0f0740965c4fb790459c731af
SHA512 639bd82bccf67a43170db8ac6b1f4056b1630a194cb57078dbf41e2af3c7a23a160a5031e5bec230ca4c911538df91293be2a7d4783e6213aff551b9e0b9643f
SSDEEP 768:qZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqKNPWQHpX:OLsF2Kerc64sTiX2IV0DhuX
TLSH
T17EE23A1B2AA17052C59320B0FA991F34C57D4CB6116BB066FB417B6928B2D63CFB0DCE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 32KB
SHA256 c022e292ee7d38bf2c2f31485f5ea9d0ba584b4de134753c2cc08aa5f11370ee
MD5 30875ceeccb567d980f7acb1361a779f
SHA1 9bc7a8b769ab0eaa713078a81cd0b92559ad0c3c
SHA512 6b0d297bc13382adf493d5067ba75b30e8afc0c325cab9e307f3ad228259f931cdab21564fed75c16a6eede641e09dad49c5c0427d71d5c6b66a775a3647e6e1
SSDEEP 768:qZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqKNPWQHpk:OLsF2Kerc64sTiX2IV0Dhuk
TLSH
T15AE23A1B2AA17052C59320B0FA991F34C57D4CB6116BB066FB417B6928B2D63CFB0DCE
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