juko | 0adb3d9482e78eefc190b24a18ffa4bd652aaae1cb98ef7964beeffefcd2e772

General

Target
2026-08-08_cdd3489652159dbce773ac78a58fbf13_elex_wannacry.exe
Size 94KB
Sample260808-msdfwadq3y
SHA256 0adb3d9482e78eefc190b24a18ffa4bd652aaae1cb98ef7964beeffefcd2e772
MD5 cdd3489652159dbce773ac78a58fbf13
SHA1 ebccc9b04c3e48f518a9d39d91101907737bf5c3
SHA512 986764423b111a297a2e8fef9690da1de73e83378c8b0945dddc8723a82ebf71aaea3feb350fa3bea88a5bca7efb2557179122de21d550644530894025d7d0d3
SSDEEP 1536:RLsF2Kerc64sTiX2IV0DxY8rqBLSaVl17oMvTbMvY4+oi9u6G6/NL:RLy2Kerc64CiGImFYgUBWTb4/NL
TLSH
T104937C2157A85153F0B246B0AD761B3098B97CB56AB3B21EBB03774D1871D21FF34B8A
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
behavioral2/memory/5748-0-0x0000000000400000-0x000000000042B000-memory.dmp	family_juko
behavioral2/files/0x0010000000016cdf-5.dat	family_juko
behavioral2/memory/5748-10-0x0000000000400000-0x000000000042B000-memory.dmp	family_juko
behavioral2/memory/360-12-0x0000000000400000-0x000000000042B000-memory.dmp	family_juko
behavioral2/files/0x000e00000001c525-13.dat	family_juko
behavioral2/memory/2000-15-0x0000000000400000-0x000000000042B000-memory.dmp	family_juko
behavioral2/memory/2000-16-0x0000000000400000-0x000000000042B000-memory.dmp	family_juko

Executes dropped EXE 2 IoCs

pid	Process
360	WINWORD.exe
2000	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
2828	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	2026-08-08_cdd3489652159dbce773ac78a58fbf13_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
2600	PING.EXE
2828	cmd.exe
4928	PING.EXE
3448	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
4928	PING.EXE
3448	PING.EXE
2600	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 5748 wrote to memory of 360	5748	2026-08-08_cdd3489652159dbce773ac78a58fbf13_elex_wannacry.exe	89
PID 360 wrote to memory of 2828	360	WINWORD.exe	90
PID 2828 wrote to memory of 4928	2828	cmd.exe	92
PID 2828 wrote to memory of 3448	2828	cmd.exe	93
PID 2828 wrote to memory of 2600	2828	cmd.exe	94
PID 2828 wrote to memory of 2000	2828	cmd.exe	95

C:\Users\Admin\AppData\Local\Temp\2026-08-08_cdd3489652159dbce773ac78a58fbf13_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-08-08_cdd3489652159dbce773ac78a58fbf13_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:5748
- 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:360
- - 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\000067EC" 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:2828
  - - 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:4928
  - - 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:3448
  - - 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:2600
  - - 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:2000

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

000067EC

Path C:\Users\Admin\AppData\Roaming\Mozilla\000067EC
Size 94KB
SHA256 015e891af3a71fc0f60f1a76b743fc2d82010984a208247985512249341b0ced
MD5 3cad8a038ed8f2ae9bc6d9c20dbf0744
SHA1 a2fa6195ca21910f12e059af528c39b1ea2fc3d0
SHA512 26d22279321257484cc5ff2718cde09e2327913f3efd8db4a15104466de1ef6931061a8b872aeb04735a2850ce08dcb3a20baf4a39c947878c78d757befdb709
SSDEEP 1536:RLsF2Kerc64sTiX2IV0DxY8rqBLSaVl17oMvTbMvY4+oi9u6G6/NV:RLy2Kerc64CiGImFYgUBWTb4/NV
TLSH
T1AD937C2157A85153F0B246B0AD761B3098B97CB56AB3B21EBB03774D1871D21FF34B8A
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 94KB
SHA256 0adb3d9482e78eefc190b24a18ffa4bd652aaae1cb98ef7964beeffefcd2e772
MD5 cdd3489652159dbce773ac78a58fbf13
SHA1 ebccc9b04c3e48f518a9d39d91101907737bf5c3
SHA512 986764423b111a297a2e8fef9690da1de73e83378c8b0945dddc8723a82ebf71aaea3feb350fa3bea88a5bca7efb2557179122de21d550644530894025d7d0d3
SSDEEP 1536:RLsF2Kerc64sTiX2IV0DxY8rqBLSaVl17oMvTbMvY4+oi9u6G6/NL:RLy2Kerc64CiGImFYgUBWTb4/NL
TLSH
T104937C2157A85153F0B246B0AD761B3098B97CB56AB3B21EBB03774D1871D21FF34B8A
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/360-12-0x0000000000400000-0x000000000042B000-memory.dmp

Download

memory/2000-15-0x0000000000400000-0x000000000042B000-memory.dmp

Download

memory/2000-16-0x0000000000400000-0x000000000042B000-memory.dmp

Download

memory/5748-0-0x0000000000400000-0x000000000042B000-memory.dmp

Download

memory/5748-10-0x0000000000400000-0x000000000042B000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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Downloads