juko | ed67ad62b3d7063b32eb090360ae0eafae89ebb4079b7deea4cb46635bca32a6

General

Target
2026-08-22_c17314474f85c21fde089f02c06cf40a_elex_wannacry.exe
Size 64KB
Sample260823-be85va1fpd
SHA256 ed67ad62b3d7063b32eb090360ae0eafae89ebb4079b7deea4cb46635bca32a6
MD5 c17314474f85c21fde089f02c06cf40a
SHA1 8c18f4579032a1bab850475628a1a19f7ca0c5fe
SHA512 64e5ef1c0131bafbd1d5bc280858613834834f7060cc4d685bbc8364d9bb9ff14464efe8064d104362ad7fc9d1dbaeb8af3a11513670be5b878b2a6a23766b85
SSDEEP 1536:sLsF2Kerc64sTiX2IV0DgsowGeP58ORX73iu/uR:sLy2Kerc64CiGIm8so28R
TLSH
T1B7536C2AA5A220B8C95780B0D5776B32D4397C350036767EA345FF312E71E12EB25E9E
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/0x0009000000019ce0-4.dat	family_juko
behavioral2/files/0x000e00000001c549-10.dat	family_juko

Executes dropped EXE 2 IoCs

pid	Process
5092	WINWORD.exe
5188	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-1-5-21-552508041-2681165170-3229858294-1000\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
4924	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	2026-08-22_c17314474f85c21fde089f02c06cf40a_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
4180	PING.EXE
2100	PING.EXE
4924	cmd.exe
2072	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
2072	PING.EXE
4180	PING.EXE
2100	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 5020 wrote to memory of 5092	5020	2026-08-22_c17314474f85c21fde089f02c06cf40a_elex_wannacry.exe	89
PID 5092 wrote to memory of 4924	5092	WINWORD.exe	90
PID 4924 wrote to memory of 2072	4924	cmd.exe	92
PID 4924 wrote to memory of 4180	4924	cmd.exe	93
PID 4924 wrote to memory of 2100	4924	cmd.exe	94
PID 4924 wrote to memory of 5188	4924	cmd.exe	95

C:\Users\Admin\AppData\Local\Temp\2026-08-22_c17314474f85c21fde089f02c06cf40a_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-08-22_c17314474f85c21fde089f02c06cf40a_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:5020
- 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:5092
- - 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\00001D42" 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:4924
  - - 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:2072
  - - 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:4180
  - - 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:2100
  - - 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:5188

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

00001D42

Path C:\Users\Admin\AppData\Roaming\Mozilla\00001D42
Size 64KB
SHA256 1defd359e7a15aecda6c30de88433afcaf7618ac4778785053af56ac8137615b
MD5 eb9bd5aca46c4eec35511c57ffcdf25a
SHA1 71a1414a557c9e790c997bab74935fe44e1cf837
SHA512 267e2a631108e11b6141523f9f1a19066acdd29fd973002363340398a7adb5eecf0985a06edfb832bb21f2ee8d317de7135ff505a7763b93eb089d15a54a1df4
SSDEEP 1536:sLsF2Kerc64sTiX2IV0DgsowGeP58ORX73iu/uJ:sLy2Kerc64CiGIm8so28J
TLSH
T1CA535C2AA5A220B8C95780B0D5776B32D4397C350036767EA345FF312E71E12EB25E9E
MD5 SHA1 SHA512 SSDEEP TLSH

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WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 64KB
SHA256 ed67ad62b3d7063b32eb090360ae0eafae89ebb4079b7deea4cb46635bca32a6
MD5 c17314474f85c21fde089f02c06cf40a
SHA1 8c18f4579032a1bab850475628a1a19f7ca0c5fe
SHA512 64e5ef1c0131bafbd1d5bc280858613834834f7060cc4d685bbc8364d9bb9ff14464efe8064d104362ad7fc9d1dbaeb8af3a11513670be5b878b2a6a23766b85
SSDEEP 1536:sLsF2Kerc64sTiX2IV0DgsowGeP58ORX73iu/uR:sLy2Kerc64CiGIm8so28R
TLSH
T1B7536C2AA5A220B8C95780B0D5776B32D4397C350036767EA345FF312E71E12EB25E9E
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