juko | 774dff9b20a500d953d06f32af1dc22600af9b7da345b2f69279d63ec7f56c62

General

Target
2026-09-07_72e04904296fd6614fd1f72680b288ce_elex_wannacry.exe
Size 64KB
Sample260908-2586mshp41
SHA256 774dff9b20a500d953d06f32af1dc22600af9b7da345b2f69279d63ec7f56c62
MD5 72e04904296fd6614fd1f72680b288ce
SHA1 6611d0d4a81762ca9351f04a76f96e869da0e407
SHA512 15a608394770dd13b93ea543602b022a8dee9434d9f960f193c717cc46d15f2dbf295d4e7270d8497a81d3c9e2a81cc7582c25eb13d73e41c05a8765c7282e54
SSDEEP 1536:sLsF2Kerc64sTiX2IV0DgsowGeP58ORX73iu/u9:sLy2Kerc64CiGIm8so289
TLSH
T195535C2AA5A220B8C95780B0D5776B32D4397C350036767EA345FF312E71E12EB25E9E
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/0x001300000001157e-4.dat	family_juko
behavioral2/files/0x000d00000001c5c5-10.dat	family_juko

Executes dropped EXE 2 IoCs

pid	Process
1792	WINWORD.exe
4480	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-1-5-21-1014449518-1831897916-4205727055-1000\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
4604	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	2026-09-07_72e04904296fd6614fd1f72680b288ce_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
6236	PING.EXE
4568	PING.EXE
4604	cmd.exe
3432	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
6236	PING.EXE
4568	PING.EXE
3432	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 6856 wrote to memory of 1792	6856	2026-09-07_72e04904296fd6614fd1f72680b288ce_elex_wannacry.exe	90
PID 1792 wrote to memory of 4604	1792	WINWORD.exe	91
PID 4604 wrote to memory of 3432	4604	cmd.exe	93
PID 4604 wrote to memory of 6236	4604	cmd.exe	94
PID 4604 wrote to memory of 4568	4604	cmd.exe	95
PID 4604 wrote to memory of 4480	4604	cmd.exe	96

C:\Users\Admin\AppData\Local\Temp\2026-09-07_72e04904296fd6614fd1f72680b288ce_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-09-07_72e04904296fd6614fd1f72680b288ce_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:6856
- 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:1792
- - 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\00000B13" 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:4604
  - - 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:3432
  - - 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:6236
  - - 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:4568
  - - 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:4480

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

00000B13

Path C:\Users\Admin\AppData\Roaming\Mozilla\00000B13
Size 64KB
SHA256 33c0c7b654c2eb4b78251c3b9ac34ae71eb161c543e86d60cfffc741587b95d2
MD5 0e5fb429e0db2a35348bbfee532b7dde
SHA1 6d7f6405b8e76c9edf15dd28f79ac54b9faeae17
SHA512 713fb4b18150bb0ec328d6536e8bc17f0a2080c407f58b8666f9c484e4e3738f144d9d6e9695cb166fd1c9bd00d76f82c557cb2c698e49c662f05a64da24e2ec
SSDEEP 1536:sLsF2Kerc64sTiX2IV0DgsowGeP58ORX73iu/ut:sLy2Kerc64CiGIm8so28t
TLSH
T13E535C2AA5A220B8C95780B0D5776B32D4397C350036767EA345FF312E71E12EB25E9E
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 64KB
SHA256 774dff9b20a500d953d06f32af1dc22600af9b7da345b2f69279d63ec7f56c62
MD5 72e04904296fd6614fd1f72680b288ce
SHA1 6611d0d4a81762ca9351f04a76f96e869da0e407
SHA512 15a608394770dd13b93ea543602b022a8dee9434d9f960f193c717cc46d15f2dbf295d4e7270d8497a81d3c9e2a81cc7582c25eb13d73e41c05a8765c7282e54
SSDEEP 1536:sLsF2Kerc64sTiX2IV0DgsowGeP58ORX73iu/u9:sLy2Kerc64CiGIm8so289
TLSH
T195535C2AA5A220B8C95780B0D5776B32D4397C350036767EA345FF312E71E12EB25E9E
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