juko | e62db5fe6a3c9f6b48fe5db1947e3489f3218f5d949798f50c3612c855c420c9

General

Target
2026-08-02_767581940d48fb57f55ad5b969d5671b_elex_wannacry.exe
Size 57KB
Sample260802-kdts7sfl9t
SHA256 e62db5fe6a3c9f6b48fe5db1947e3489f3218f5d949798f50c3612c855c420c9
MD5 767581940d48fb57f55ad5b969d5671b
SHA1 a4acb0574bbc51f93401906cd472d1e1e6622e4c
SHA512 cc8d1c5c7b96bcb401f87d5e55b4452ed7a4527fd8da432bfdd0b02f095764f29001cdfe48d2731bdc838fd52a7e81e3369bd8dc0ce49e1c72e4fcc48f1cbae4
SSDEEP 1536:qLsF2Kerc64sTiX2IV0DYlNpyyCwlAY0VdTQ5:qLy2Kerc64CiGImklNUyp8T6
TLSH
T184433C16B950B072D99220B06A6D6B36417A9DF10317A1D3E7407ADD68F2FD2EF306CE
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/5896-0-0x0000000000400000-0x0000000000422000-memory.dmp	family_juko
behavioral2/files/0x000700000000697a-5.dat	family_juko
behavioral2/memory/5896-10-0x0000000000400000-0x0000000000422000-memory.dmp	family_juko
behavioral2/memory/5960-12-0x0000000000400000-0x0000000000422000-memory.dmp	family_juko
behavioral2/files/0x0007000000016b5e-13.dat	family_juko
behavioral2/memory/3304-15-0x0000000000400000-0x0000000000422000-memory.dmp	family_juko
behavioral2/memory/3304-16-0x0000000000400000-0x0000000000422000-memory.dmp	family_juko

Executes dropped EXE 2 IoCs

pid	Process
5960	WINWORD.exe
3304	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-1-5-21-189034102-168398478-1159367937-1000\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
3560	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	2026-08-02_767581940d48fb57f55ad5b969d5671b_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

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
3560	cmd.exe
2052	PING.EXE
6004	PING.EXE
2380	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
2052	PING.EXE
6004	PING.EXE
2380	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 5896 wrote to memory of 5960	5896	2026-08-02_767581940d48fb57f55ad5b969d5671b_elex_wannacry.exe	89
PID 5960 wrote to memory of 3560	5960	WINWORD.exe	90
PID 3560 wrote to memory of 2052	3560	cmd.exe	92
PID 3560 wrote to memory of 6004	3560	cmd.exe	93
PID 3560 wrote to memory of 2380	3560	cmd.exe	94
PID 3560 wrote to memory of 3304	3560	cmd.exe	95

C:\Users\Admin\AppData\Local\Temp\2026-08-02_767581940d48fb57f55ad5b969d5671b_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-08-02_767581940d48fb57f55ad5b969d5671b_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:5896
- 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:5960
- - 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\00006ABF" 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:3560
  - - 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:2052
  - - 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:6004
  - - 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:2380
  - - 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:3304

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

Replay Monitor

Loading Replay Monitor...

Downloads

00006ABF

Path C:\Users\Admin\AppData\Roaming\Mozilla\00006ABF
Size 57KB
SHA256 7f4939b9d89e4c0f0183ff80a3d15901e711bf0287d07f85ed97b74400ed7acf
MD5 3b93d7405fc8fbd20a33919082ba059f
SHA1 267de3b4bf07990d1ee4d089afed43d31a9f65cb
SHA512 4f575deedf8d54799d5614ecc5428a6a512a2f6141cf33ed3166f49d20e59c949fdb50c59a19a2f6342f1e65aed9826a64e64649a254af432b65e9d05158265c
SSDEEP 1536:qLsF2Kerc64sTiX2IV0DYlNpyyCwlAY0VdTQB:qLy2Kerc64CiGImklNUyp8Tu
TLSH
T11B433C16B950B072D99220B06A6D6B36417A9DF10317A1D3E7407ADD68F2FD2EF306CE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 57KB
SHA256 e62db5fe6a3c9f6b48fe5db1947e3489f3218f5d949798f50c3612c855c420c9
MD5 767581940d48fb57f55ad5b969d5671b
SHA1 a4acb0574bbc51f93401906cd472d1e1e6622e4c
SHA512 cc8d1c5c7b96bcb401f87d5e55b4452ed7a4527fd8da432bfdd0b02f095764f29001cdfe48d2731bdc838fd52a7e81e3369bd8dc0ce49e1c72e4fcc48f1cbae4
SSDEEP 1536:qLsF2Kerc64sTiX2IV0DYlNpyyCwlAY0VdTQ5:qLy2Kerc64CiGImklNUyp8T6
TLSH
T184433C16B950B072D99220B06A6D6B36417A9DF10317A1D3E7407ADD68F2FD2EF306CE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/3304-15-0x0000000000400000-0x0000000000422000-memory.dmp

Download

memory/3304-16-0x0000000000400000-0x0000000000422000-memory.dmp

Download

memory/5896-0-0x0000000000400000-0x0000000000422000-memory.dmp

Download

memory/5896-10-0x0000000000400000-0x0000000000422000-memory.dmp

Download

memory/5960-12-0x0000000000400000-0x0000000000422000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

Replay Monitor

Loading Replay Monitor...

Downloads