juko | cae2117aab3ed260ddf44a8d4e22b973104709a8edf435a1b4270191cb90cd89

General

Target
2026-08-27_f0af5a12062bbbc9e66f8b0db047eba6_elex_wannacry.exe
Size 53KB
Sample260828-clncdssshv
SHA256 cae2117aab3ed260ddf44a8d4e22b973104709a8edf435a1b4270191cb90cd89
MD5 f0af5a12062bbbc9e66f8b0db047eba6
SHA1 5c20e53d0239711500475d9ecae489bc88f3216f
SHA512 8efeda3e1fff967a0ed46affaaa62d1ad37498b6aef54546d86a68b7c83525c083453aa4a75cae1c25860eaf8d56a7706bd6f113cd7ee403d583c6a20c236914
SSDEEP 1536:3LsF2Kerc64sTiX2IV0D5tcz9Kf8pOOq22:3Ly2Kerc64CiGIm1tcBMUOOF2
TLSH
T1B2335C176A459056C0BB52B0FC884F30823AADB405B7B213B349B65D1CB2E52DFB1DBE
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/0x000c000000011377-3.dat	family_juko
behavioral2/files/0x001100000001c528-10.dat	family_juko

Executes dropped EXE 2 IoCs

pid	Process
2456	WINWORD.exe
824	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-1-5-21-3797332335-34111092-3597280141-1000\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
5104	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	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
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-08-27_f0af5a12062bbbc9e66f8b0db047eba6_elex_wannacry.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
2080	PING.EXE
3900	PING.EXE
5104	cmd.exe
1244	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
1244	PING.EXE
2080	PING.EXE
3900	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 6044 wrote to memory of 2456	6044	2026-08-27_f0af5a12062bbbc9e66f8b0db047eba6_elex_wannacry.exe	89
PID 2456 wrote to memory of 5104	2456	WINWORD.exe	90
PID 5104 wrote to memory of 1244	5104	cmd.exe	92
PID 5104 wrote to memory of 2080	5104	cmd.exe	93
PID 5104 wrote to memory of 3900	5104	cmd.exe	94
PID 5104 wrote to memory of 824	5104	cmd.exe	95

C:\Users\Admin\AppData\Local\Temp\2026-08-27_f0af5a12062bbbc9e66f8b0db047eba6_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-08-27_f0af5a12062bbbc9e66f8b0db047eba6_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:6044
- 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:2456
- - 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\00004A2F" 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:5104
  - - 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:1244
  - - 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:2080
  - - 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:3900
  - - 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:824

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

00004A2F

Path C:\Users\Admin\AppData\Roaming\Mozilla\00004A2F
Size 53KB
SHA256 820cbd3fe9ee0734b16181ee256b0e90a4856298f7ea17735d855bf989f3fc88
MD5 c5d620812ea0074ffb7c18f68dc01aea
SHA1 23835998d374db4c2a38a253748a39f1e1f3a3be
SHA512 87c06f36cf9a559bb352bcb00fc36f4a2f98e571680e0fb534cc1bf706ee30208d7e2066d050e9c6f4aa8676151627449a17b791e30d6cec77245ca6d236ac20
SSDEEP 1536:3LsF2Kerc64sTiX2IV0D5tcz9Kf8pOOq2d:3Ly2Kerc64CiGIm1tcBMUOOFd
TLSH
T19A335C176A459056C0BB52B0FC884F30823AADB405B7B213B349B65D1CB2E52DFB1DBE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 53KB
SHA256 cae2117aab3ed260ddf44a8d4e22b973104709a8edf435a1b4270191cb90cd89
MD5 f0af5a12062bbbc9e66f8b0db047eba6
SHA1 5c20e53d0239711500475d9ecae489bc88f3216f
SHA512 8efeda3e1fff967a0ed46affaaa62d1ad37498b6aef54546d86a68b7c83525c083453aa4a75cae1c25860eaf8d56a7706bd6f113cd7ee403d583c6a20c236914
SSDEEP 1536:3LsF2Kerc64sTiX2IV0D5tcz9Kf8pOOq22:3Ly2Kerc64CiGIm1tcBMUOOF2
TLSH
T1B2335C176A459056C0BB52B0FC884F30823AADB405B7B213B349B65D1CB2E52DFB1DBE
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