juko | aa6285d67f56e2a6971267fe716bedf20b8de688b146c97a93620cb2345b8d86

General

Target
2026-08-24_948cc485276a22b2d76e91065ea6e67d_elex_wannacry.exe
Size 88KB
Sample260825-h3xv2styft
SHA256 aa6285d67f56e2a6971267fe716bedf20b8de688b146c97a93620cb2345b8d86
MD5 948cc485276a22b2d76e91065ea6e67d
SHA1 dc2c587ddf12a839dc84f0b95e54dc388bc42464
SHA512 90bda8e32694f827734f1279107485b7d35b3f274ac5a136459bac43d99679777fdf4be68d7c947f3e1761f2c84180d2bc34567f068793db508b4479fe91d2fb
SSDEEP 1536:zLsF2Kerc64sTiX2IV0D7c/wGeP58ORX73iu/uwzCR3lsl5cN35fWJcedCgVjrsJ:zLy2Kerc64CiGImHc/28wzCBlycJWeea
TLSH
T1D6933C2EA59320FCCA5BC170C6BB6732D4357C251035B63E6344FB352E70E62AB29E59
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 7 IoCs

resource	yara_rule
behavioral1/memory/4104-0-0x0000000000400000-0x000000000042A000-memory.dmp	family_juko
behavioral1/files/0x00130000000243ca-5.dat	family_juko
behavioral1/memory/4104-12-0x0000000000400000-0x000000000042A000-memory.dmp	family_juko
behavioral1/memory/3536-14-0x0000000000400000-0x000000000042A000-memory.dmp	family_juko
behavioral1/files/0x00090000000244eb-15.dat	family_juko
behavioral1/memory/1700-17-0x0000000000400000-0x000000000042A000-memory.dmp	family_juko
behavioral1/memory/1700-18-0x0000000000400000-0x000000000042A000-memory.dmp	family_juko

Checks computer location settings 2 TTPs 2 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1788976790-1541110888-1636651838-1000\Control Panel\International\Geo\Nation	2026-08-24_948cc485276a22b2d76e91065ea6e67d_elex_wannacry.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1788976790-1541110888-1636651838-1000\Control Panel\International\Geo\Nation	WINWORD.exe

Executes dropped EXE 2 IoCs

pid	Process
3536	WINWORD.exe
1700	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-1-5-21-1788976790-1541110888-1636651838-1000\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
5112	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	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	2026-08-24_948cc485276a22b2d76e91065ea6e67d_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

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
5112	cmd.exe
4732	PING.EXE
876	PING.EXE
4864	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
4732	PING.EXE
876	PING.EXE
4864	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4104 wrote to memory of 3536	4104	2026-08-24_948cc485276a22b2d76e91065ea6e67d_elex_wannacry.exe	86
PID 3536 wrote to memory of 5112	3536	WINWORD.exe	89
PID 5112 wrote to memory of 4732	5112	cmd.exe	91
PID 5112 wrote to memory of 876	5112	cmd.exe	92
PID 5112 wrote to memory of 4864	5112	cmd.exe	93
PID 5112 wrote to memory of 1700	5112	cmd.exe	94

C:\Users\Admin\AppData\Local\Temp\2026-08-24_948cc485276a22b2d76e91065ea6e67d_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-08-24_948cc485276a22b2d76e91065ea6e67d_elex_wannacry.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4104
- C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
  "C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe" -r
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3536
- - 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\0000130F" 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:5112
  - - 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:4732
  - - 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:876
  - - 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:4864
  - - 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:1700

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

Query Registry

1

T1012

Remote System Discovery

1

T1018

System Information Discovery

2

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

0000130F

Path C:\Users\Admin\AppData\Roaming\Mozilla\0000130F
Size 88KB
SHA256 5bec793ef7e56ccd505b418c43bd8f9c1384ed38e607ab04857d8c9d4dda76ba
MD5 ff0f3c970b3b056d1834d937515ca304
SHA1 aaeecf1480535d67e54571744ab4ac443ecc49ae
SHA512 4f8e9ef9e93b688c3db88762eb2f1dd4395387dd9936af8a9153b6b8ae46901d7637945939de6a0c6dd9af15a064db2fc0732cfefed16525e0c6eb2fad634c8a
SSDEEP 1536:zLsF2Kerc64sTiX2IV0D7c/wGeP58ORX73iu/uwzCR3lsl5cN35fWJcedCgVjrs+:zLy2Kerc64CiGImHc/28wzCBlycJWeep
TLSH
T129933C2EA59320FCCA5BC170C6BB6732D4357C251035B63E6344FB352E70E62AB29E59
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 88KB
SHA256 aa6285d67f56e2a6971267fe716bedf20b8de688b146c97a93620cb2345b8d86
MD5 948cc485276a22b2d76e91065ea6e67d
SHA1 dc2c587ddf12a839dc84f0b95e54dc388bc42464
SHA512 90bda8e32694f827734f1279107485b7d35b3f274ac5a136459bac43d99679777fdf4be68d7c947f3e1761f2c84180d2bc34567f068793db508b4479fe91d2fb
SSDEEP 1536:zLsF2Kerc64sTiX2IV0D7c/wGeP58ORX73iu/uwzCR3lsl5cN35fWJcedCgVjrsJ:zLy2Kerc64CiGImHc/28wzCBlycJWeea
TLSH
T1D6933C2EA59320FCCA5BC170C6BB6732D4357C251035B63E6344FB352E70E62AB29E59
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/1700-17-0x0000000000400000-0x000000000042A000-memory.dmp

Download

memory/1700-18-0x0000000000400000-0x000000000042A000-memory.dmp

Download

memory/3536-14-0x0000000000400000-0x000000000042A000-memory.dmp

Download

memory/4104-0-0x0000000000400000-0x000000000042A000-memory.dmp

Download

memory/4104-12-0x0000000000400000-0x000000000042A000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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Downloads