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
behavioral2/files/0x0009000000016b4d-4.dat	family_juko
behavioral2/files/0x000f00000001c49e-10.dat	family_juko

Executes dropped EXE 2 IoCs

pid	Process
256	WINWORD.exe
2896	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-1-5-21-552508041-2681165170-3229858294-1000\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
3372	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	2026-08-30_30875ceeccb567d980f7acb1361a779f_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
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PING.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
3372	cmd.exe
4876	PING.EXE
4664	PING.EXE
2096	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
4876	PING.EXE
4664	PING.EXE
2096	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4632 wrote to memory of 256	4632	2026-08-30_30875ceeccb567d980f7acb1361a779f_elex_wannacry.exe	89
PID 256 wrote to memory of 3372	256	WINWORD.exe	90
PID 3372 wrote to memory of 4876	3372	cmd.exe	92
PID 3372 wrote to memory of 4664	3372	cmd.exe	93
PID 3372 wrote to memory of 2096	3372	cmd.exe	94
PID 3372 wrote to memory of 2896	3372	cmd.exe	95

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⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4632
- 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:256
- - 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\00004745" 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:3372
  - - 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:4876
  - - 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:4664
  - - 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:2096
  - - 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:2896

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

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

00004745

Path C:\Users\Admin\AppData\Roaming\Mozilla\00004745
Size 32KB
SHA256 89e64e2c3436504ad205e2c7588ee30ac4c7d1150caaf151367b7ed1a9b6b693
MD5 338875286dbe4c1fdbdeb1b91533f244
SHA1 e421744d6fb28ded70f08d235feeea4a8213aacd
SHA512 8eefb723431c63d56bb1eace94a1192bc13b9232eeaef953228e1fa2350680dc6202c02e9a1ba66baa00681b49b045c483a14de375c3cf419300a41581ad4438
SSDEEP 768:qZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqKNPWQHpX:OLsF2Kerc64sTiX2IV0DhuX
TLSH
T184E23A1B2AA17052C59320B0FA991F34C57D4CB6116BB066FB417B6928B2D63CFB0DCE
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