juko | 8d95c8a71d3252a5170762cd1837d4ba0023e67066482e5e34c7667559ccbd9d

General

Target
2026-10-11_1f66bae389bba10c7a83fac0ca14f6fa_elex_wannacry.exe
Size 67KB
Sample261013-dh2laavz7k
SHA256 8d95c8a71d3252a5170762cd1837d4ba0023e67066482e5e34c7667559ccbd9d
MD5 1f66bae389bba10c7a83fac0ca14f6fa
SHA1 f713ff1d105801e08ff7ddd5c00248273289b7ee
SHA512 5c6f98f5a3faec350b5fddc51a65ba82d2f4838a00d4a31f275e8596f0eb52f47e469a579e4688085ac8fe5d581141e14280b40448e1e6042fe8e6bb3d39f6f7
SSDEEP 1536:aLsF2Kerc64sTiX2IV0DVyIGFoyyCwlAY0VdTQd:aLy2Kerc64CiGImRylFyp8T6
TLSH
T173633B16B950B032D99211B46A6D6B36817A9DF10707A0D3F7407ADD28F2BD2EF346CE
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 6 IoCs

resource	yara_rule
behavioral2/memory/4872-0-0x0000000000400000-0x000000000041D000-memory.dmp	family_juko
behavioral2/files/0x001400000001b1c0-4.dat	family_juko
behavioral2/memory/4872-10-0x0000000000400000-0x000000000041D000-memory.dmp	family_juko
behavioral2/memory/2980-12-0x0000000000400000-0x000000000041D000-memory.dmp	family_juko
behavioral2/files/0x000e00000001c49e-13.dat	family_juko
behavioral2/memory/2096-16-0x0000000000400000-0x000000000041D000-memory.dmp	family_juko

Executes dropped EXE 2 IoCs

pid	Process
2980	WINWORD.exe
2096	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
4192	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	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	2026-10-11_1f66bae389bba10c7a83fac0ca14f6fa_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

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
4192	cmd.exe
1852	PING.EXE
4812	PING.EXE
3224	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
1852	PING.EXE
4812	PING.EXE
3224	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4872 wrote to memory of 2980	4872	2026-10-11_1f66bae389bba10c7a83fac0ca14f6fa_elex_wannacry.exe	89
PID 2980 wrote to memory of 4192	2980	WINWORD.exe	90
PID 4192 wrote to memory of 1852	4192	cmd.exe	92
PID 4192 wrote to memory of 4812	4192	cmd.exe	93
PID 4192 wrote to memory of 3224	4192	cmd.exe	94
PID 4192 wrote to memory of 2096	4192	cmd.exe	95

C:\Users\Admin\AppData\Local\Temp\2026-10-11_1f66bae389bba10c7a83fac0ca14f6fa_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-10-11_1f66bae389bba10c7a83fac0ca14f6fa_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4872
- 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:2980
- - 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\00007C0D" 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:4192
  - - 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:1852
  - - 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:4812
  - - 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:3224
  - - 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:2096

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

00007C0D

Path C:\Users\Admin\AppData\Roaming\Mozilla\00007C0D
Size 67KB
SHA256 d0bb81c71565599d0bf428e01d6703219f25e1d58819ae1ec1d04b8a3f5c5c93
MD5 c98eb5819f55afc571829e2ad5b905fc
SHA1 fd21b8d9561df3ad230104e75c9e3ea9c6e9f396
SHA512 5c09b671106c8afeb06d231fd30a9d902e76061ccc3ec479b6d0cfe8192aac0ee6278eeffbc2160104c4084a348eed81ed25caeb30b9720797032ec728f5c2c6
SSDEEP 1536:aLsF2Kerc64sTiX2IV0DVyIGFoyyCwlAY0VdTQJ:aLy2Kerc64CiGImRylFyp8T2
TLSH
T176634B16B950B032D99211B46A6D6B36817A9DF10707A0D3F7407ADD28F2BD2EF346CE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 67KB
SHA256 8d95c8a71d3252a5170762cd1837d4ba0023e67066482e5e34c7667559ccbd9d
MD5 1f66bae389bba10c7a83fac0ca14f6fa
SHA1 f713ff1d105801e08ff7ddd5c00248273289b7ee
SHA512 5c6f98f5a3faec350b5fddc51a65ba82d2f4838a00d4a31f275e8596f0eb52f47e469a579e4688085ac8fe5d581141e14280b40448e1e6042fe8e6bb3d39f6f7
SSDEEP 1536:aLsF2Kerc64sTiX2IV0DVyIGFoyyCwlAY0VdTQd:aLy2Kerc64CiGImRylFyp8T6
TLSH
T173633B16B950B032D99211B46A6D6B36817A9DF10707A0D3F7407ADD28F2BD2EF346CE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/2096-16-0x0000000000400000-0x000000000041D000-memory.dmp

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memory/2980-12-0x0000000000400000-0x000000000041D000-memory.dmp

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memory/4872-0-0x0000000000400000-0x000000000041D000-memory.dmp

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memory/4872-10-0x0000000000400000-0x000000000041D000-memory.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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