juko | 118812874edce095b1dacd141623c7d5ee7633b32b79ce1cfff7a05c7a2e23a4

General

Target
2026-07-01_1836f1ceddf346f84bb44c1264404c86_elex_wannacry.exe
Size 47KB
Sample260701-pewfmsfx3w
SHA256 118812874edce095b1dacd141623c7d5ee7633b32b79ce1cfff7a05c7a2e23a4
MD5 1836f1ceddf346f84bb44c1264404c86
SHA1 cce298e3f3e82d8d2afb07700f9c48369bb82839
SHA512 50298b64d958d461a18a01deb8d814c7375423141673ea5ca7d2c6656b2a69fc9feeb25c9830249add103a461cd3c55483e98734dc980a46d53c98b680211f9b
SSDEEP 768:tyZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqZNPWQHmgyFIvA0vqxet2dMINJO:t2LsF2Kerc64sTiX2IV0DOlgy6vlvqxo
TLSH
T16F235B173EA520C1D6D610B0EAA90F78843DEDB50127A152F780B65D2CB6E62DF71ECE
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

discovery 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/0x000d000000019cb6-4.dat	family_juko
behavioral2/files/0x001000000001c585-10.dat	family_juko

Executes dropped EXE 2 IoCs

pid	Process
1424	WINWORD.exe
5860	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-1-5-21-2132828192-1552876075-2324613956-1000\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

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	2026-07-01_1836f1ceddf346f84bb44c1264404c86_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
4944	cmd.exe
2604	PING.EXE
3164	PING.EXE
3524	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
2604	PING.EXE
3164	PING.EXE
3524	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 920 wrote to memory of 1424	920	2026-07-01_1836f1ceddf346f84bb44c1264404c86_elex_wannacry.exe	88
PID 1424 wrote to memory of 4944	1424	WINWORD.exe	89
PID 4944 wrote to memory of 2604	4944	cmd.exe	91
PID 4944 wrote to memory of 3164	4944	cmd.exe	92
PID 4944 wrote to memory of 3524	4944	cmd.exe	93
PID 4944 wrote to memory of 5860	4944	cmd.exe	94

C:\Users\Admin\AppData\Local\Temp\2026-07-01_1836f1ceddf346f84bb44c1264404c86_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-07-01_1836f1ceddf346f84bb44c1264404c86_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:920
- 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:1424
- - 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\000043C2" WINWORD.exe&ping 127.0.0.1 -n 2&"C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe" \r
    3⤵
    - System Location Discovery: System Language Discovery
    - System Network Configuration Discovery: Internet Connection Discovery
    - Suspicious use of WriteProcessMemory
    PID:4944
  - - 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:2604
  - - 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:3164
  - - 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:3524
  - - 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:5860

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

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

000043C2

Path C:\Users\Admin\AppData\Roaming\Mozilla\000043C2
Size 47KB
SHA256 ce70335a28f7693f408be3ce45638c59935f0e25130d92a99a35df2e757d31c5
MD5 7d0d2678892b16945ecce9e4b65a966e
SHA1 ea2bde33ba129626c84a11de6a9bb92213829211
SHA512 08808830cc672bcfcf7fc3a4ad139dd3457f0ebd3f5a50cb6faccc2fc147efa069b46d9bd6782b5ee5e319e74bbb7f07ea7e97964b3d1cc6500eb840c7eeda93
SSDEEP 768:tyZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqZNPWQHmgyFIvA0vqxet2dMINJH:t2LsF2Kerc64sTiX2IV0DOlgy6vlvqxt
TLSH
T121235B173EA520C1D6D610B0EAA90F78843DEDB50127A152F780B65D2CB6E62DF71ECE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 47KB
SHA256 118812874edce095b1dacd141623c7d5ee7633b32b79ce1cfff7a05c7a2e23a4
MD5 1836f1ceddf346f84bb44c1264404c86
SHA1 cce298e3f3e82d8d2afb07700f9c48369bb82839
SHA512 50298b64d958d461a18a01deb8d814c7375423141673ea5ca7d2c6656b2a69fc9feeb25c9830249add103a461cd3c55483e98734dc980a46d53c98b680211f9b
SSDEEP 768:tyZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqZNPWQHmgyFIvA0vqxet2dMINJO:t2LsF2Kerc64sTiX2IV0DOlgy6vlvqxo
TLSH
T16F235B173EA520C1D6D610B0EAA90F78843DEDB50127A152F780B65D2CB6E62DF71ECE
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