juko | 1a478e84035b7174be633fdbcabbca94c8f21862882ec41d758d328471c2a505

General

Target
2026-10-06_96d3b52427c0aae186f36744c33833d7_elex_wannacry.exe
Size 47KB
Sample261007-23b35afw2t
SHA256 1a478e84035b7174be633fdbcabbca94c8f21862882ec41d758d328471c2a505
MD5 96d3b52427c0aae186f36744c33833d7
SHA1 c7058abde9c7749d0dc31161400528284864b2c6
SHA512 4837736d9eb2736be45e6970bb37303f9af1235bcde8a55ca83110f6cfdd5a00edea0be922e24ba0bf4528a4bdc18d1ed7ed060bcaa4a5c885d0b3d6addcbc65
SSDEEP 768:8ZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqSNPWQH6tXeUa0dX6w:ALsF2Kerc64sTiX2IV0DZZTow
TLSH
T1FF235A1BFE616052C18611B0FD699F3985799CB0047BB062B780BB1D28B2DA3CF709CD
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/0x000a00000001af5f-3.dat	family_juko
behavioral2/files/0x000f00000001c508-10.dat	family_juko

Executes dropped EXE 2 IoCs

pid	Process
4112	WINWORD.exe
4740	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-1-5-21-461973139-3212354679-1508698038-1000\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
3028	cmd.exe

Reads the TCP/IP host and domain name from the registry 1 TTPs 2 IoCs

The configured hostname and DNS domain identify the machine and are commonly collected to profile a host before it reports in.

discovery

System Network Configuration Discovery

T1016

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Hostname	WINWORD.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Domain	WINWORD.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	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	2026-10-06_96d3b52427c0aae186f36744c33833d7_elex_wannacry.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
4820	PING.EXE
2560	PING.EXE
252	PING.EXE
3028	cmd.exe

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
2560	PING.EXE
252	PING.EXE
4820	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 5212 wrote to memory of 4112	5212	2026-10-06_96d3b52427c0aae186f36744c33833d7_elex_wannacry.exe	89
PID 4112 wrote to memory of 3028	4112	WINWORD.exe	90
PID 3028 wrote to memory of 4820	3028	cmd.exe	92
PID 3028 wrote to memory of 2560	3028	cmd.exe	93
PID 3028 wrote to memory of 252	3028	cmd.exe	94
PID 3028 wrote to memory of 4740	3028	cmd.exe	95

C:\Users\Admin\AppData\Local\Temp\2026-10-06_96d3b52427c0aae186f36744c33833d7_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-10-06_96d3b52427c0aae186f36744c33833d7_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:5212
- 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:4112
- - 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\000015C5" 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:3028
  - - 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:4820
  - - 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:2560
  - - 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:252
  - - 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
      Reads the TCP/IP host and domain name from the registry
      System Location Discovery: System Language Discovery
      PID:4740

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

2

T1016

Internet Connection Discovery

1

T1016.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

000015C5

Path C:\Users\Admin\AppData\Roaming\Mozilla\000015C5
Size 47KB
SHA256 1aa2eaf010db81c0a56f652f3d13f199eb8504a33540a9ab4242645f69bc2dc0
MD5 8d425d0c898786e8e6b9aeb31f457dd3
SHA1 f9b59bbae0ddd8b70a028c6e86ddfbbf32335295
SHA512 202d2e5ac566cfd13f3babe2b10d7508ddf527e12ea8acf34b82c06333121b16db376d2a1c5b576d03778d3b2f9aba8488d392261e7457f701697017c6d0ff0c
SSDEEP 768:8ZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqSNPWQH6tXeUa0dX6w:ALsF2Kerc64sTiX2IV0DZZTow
TLSH
T169235A1BFE616052C19611B0FD699F3585799CB4047BB162B780BB1D28B2DA3CF709CD
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 47KB
SHA256 1a478e84035b7174be633fdbcabbca94c8f21862882ec41d758d328471c2a505
MD5 96d3b52427c0aae186f36744c33833d7
SHA1 c7058abde9c7749d0dc31161400528284864b2c6
SHA512 4837736d9eb2736be45e6970bb37303f9af1235bcde8a55ca83110f6cfdd5a00edea0be922e24ba0bf4528a4bdc18d1ed7ed060bcaa4a5c885d0b3d6addcbc65
SSDEEP 768:8ZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqSNPWQH6tXeUa0dX6w:ALsF2Kerc64sTiX2IV0DZZTow
TLSH
T1FF235A1BFE616052C18611B0FD699F3985799CB0047BB062B780BB1D28B2DA3CF709CD
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