juko | a72130476cef9115f0572e72ac00a4a4399b1243497193179cb4b934d5a0e030

General

Target
2026-08-15_e96f713da123642602523c47df99f026_elex_wannacry.exe
Size 50KB
Sample260815-3sgrashr21
SHA256 a72130476cef9115f0572e72ac00a4a4399b1243497193179cb4b934d5a0e030
MD5 e96f713da123642602523c47df99f026
SHA1 e1cf852fb7a53399aece513fbcac23bb8c185ca7
SHA512 a880b92d6ee34d03cd585f7c9848ef37b3efc109448c3c39c68066fa98abfc201d8df16b77cb9e61be7f42e57c14f4c0527b59a12f9559727e420c8277bfaaf1
SSDEEP 768:DZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqiNPWQHc8Sdq96AaWILO4:tLsF2Kerc64sTiX2IV0DpL8SE9nYO4
TLSH
T16C33291A3B41E1D1C4A351B0EC5B4F74983AEDB58E276143BB85B70D1CB2A52CF3298E
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/0x000a000000011396-4.dat	family_juko
behavioral2/files/0x000a000000016bca-10.dat	family_juko

Executes dropped EXE 2 IoCs

pid	Process
1608	WINWORD.exe
3344	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-1-5-21-3611646547-550105268-947503007-1000\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
1588	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	PING.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	WINWORD.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-08-15_e96f713da123642602523c47df99f026_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

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
1588	cmd.exe
4336	PING.EXE
796	PING.EXE
6132	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
4336	PING.EXE
796	PING.EXE
6132	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4592 wrote to memory of 1608	4592	2026-08-15_e96f713da123642602523c47df99f026_elex_wannacry.exe	89
PID 1608 wrote to memory of 1588	1608	WINWORD.exe	90
PID 1588 wrote to memory of 4336	1588	cmd.exe	92
PID 1588 wrote to memory of 796	1588	cmd.exe	93
PID 1588 wrote to memory of 6132	1588	cmd.exe	94
PID 1588 wrote to memory of 3344	1588	cmd.exe	95

C:\Users\Admin\AppData\Local\Temp\2026-08-15_e96f713da123642602523c47df99f026_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-08-15_e96f713da123642602523c47df99f026_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4592
- 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:1608
- - 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\00002CC4" 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:1588
  - - 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:4336
  - - 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:796
  - - 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:6132
  - - 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:3344

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

00002CC4

Path C:\Users\Admin\AppData\Roaming\Mozilla\00002CC4
Size 50KB
SHA256 0515be7b18fe10d4ec6bc87e6ccde422f20644d17f01e8022f2adfd8c8ee7136
MD5 f1adc0f8a7e161dea621c7eee534c356
SHA1 b1d499e9191ab604f7ee96e1b3e06effab59d0b9
SHA512 2f24e4b568962d7011058457b859a792560d251ce487a31bfff9bbf540c114e69a1ff8c717facbc62ab4d65b6109de33da43e3914b41efb8496fe3cb8deea0e5
SSDEEP 768:DZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqiNPWQHc8Sdq96AaWILO3:tLsF2Kerc64sTiX2IV0DpL8SE9nYO3
TLSH
T12633291A3B41E1D1C4A351B0EC5B4F74983AEDB58E276103BB85B70D1CB2A52CF3298E
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 50KB
SHA256 a72130476cef9115f0572e72ac00a4a4399b1243497193179cb4b934d5a0e030
MD5 e96f713da123642602523c47df99f026
SHA1 e1cf852fb7a53399aece513fbcac23bb8c185ca7
SHA512 a880b92d6ee34d03cd585f7c9848ef37b3efc109448c3c39c68066fa98abfc201d8df16b77cb9e61be7f42e57c14f4c0527b59a12f9559727e420c8277bfaaf1
SSDEEP 768:DZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqiNPWQHc8Sdq96AaWILO4:tLsF2Kerc64sTiX2IV0DpL8SE9nYO4
TLSH
T16C33291A3B41E1D1C4A351B0EC5B4F74983AEDB58E276143BB85B70D1CB2A52CF3298E
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