juko | 85ac2a056373572083ba00a4e460692eadcb484a2fe89ba4e85ae5652b598a0b

General

Target
2026-07-01_f089b0548867cfa99903dc8a127abbf6_elex_wannacry.exe
Size 64KB
Sample260701-b4c4psdz3s
SHA256 85ac2a056373572083ba00a4e460692eadcb484a2fe89ba4e85ae5652b598a0b
MD5 f089b0548867cfa99903dc8a127abbf6
SHA1 5c0e7ca87085a5a11168d49577ecd61ba2813c1a
SHA512 b49de73fc168b41f2f2e4bc7ebbad77d8c86b6925dcd45931dccb586dd9669d67b700810a442318458b49a617af3bcdb1ae1183184dc8598a6b8baf49c30f69c
SSDEEP 1536:sLsF2Kerc64sTiX2IV0DgsowGeP58ORX73iu/uC:sLy2Kerc64CiGIm8so28C
TLSH
T1B8535C2AA5A220B8C95780B0D5776B32D4397C350036767EA345FF312E71E12EB25E9E
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/0x000700000001b84b-4.dat	family_juko
behavioral2/files/0x001500000001c4ce-10.dat	family_juko

Executes dropped EXE 2 IoCs

pid	Process
2460	WINWORD.exe
1448	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-1-5-21-3047816590-610495838-277027736-1000\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	2026-07-01_f089b0548867cfa99903dc8a127abbf6_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
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	WINWORD.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
2200	PING.EXE
2516	PING.EXE
3460	cmd.exe
6140	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
6140	PING.EXE
2200	PING.EXE
2516	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1124 wrote to memory of 2460	1124	2026-07-01_f089b0548867cfa99903dc8a127abbf6_elex_wannacry.exe	88
PID 2460 wrote to memory of 3460	2460	WINWORD.exe	89
PID 3460 wrote to memory of 6140	3460	cmd.exe	91
PID 3460 wrote to memory of 2200	3460	cmd.exe	92
PID 3460 wrote to memory of 2516	3460	cmd.exe	93
PID 3460 wrote to memory of 1448	3460	cmd.exe	94

C:\Users\Admin\AppData\Local\Temp\2026-07-01_f089b0548867cfa99903dc8a127abbf6_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-07-01_f089b0548867cfa99903dc8a127abbf6_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1124
- 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:2460
- - 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\000056BF" 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:3460
  - - 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:6140
  - - 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:2200
  - - 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:2516
  - - 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:1448

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

000056BF

Path C:\Users\Admin\AppData\Roaming\Mozilla\000056BF
Size 64KB
SHA256 33378ff33e1d826d135e9f6a34ea21e28455072dde3dd724d642a99e56467b13
MD5 c43e13ff59860bd62a933c68d8d3d8c6
SHA1 914744eaf5ad72c8e96bab58a5b202dc33c644ed
SHA512 3907937c8b9f9e1affdc7e45ecab555bba1b202f816835e854dbbc03eb2da9b6bd5765d2caa975e4205f147213a499b1ce316ff7d5c1c7e6152266528f67ad27
SSDEEP 1536:sLsF2Kerc64sTiX2IV0DgsowGeP58ORX73iu/uF:sLy2Kerc64CiGIm8so28F
TLSH
T126536C2AA5A220B8C95780B0D5776B32D4397C350036767EA345FF312E71E12EB25E9E
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 64KB
SHA256 85ac2a056373572083ba00a4e460692eadcb484a2fe89ba4e85ae5652b598a0b
MD5 f089b0548867cfa99903dc8a127abbf6
SHA1 5c0e7ca87085a5a11168d49577ecd61ba2813c1a
SHA512 b49de73fc168b41f2f2e4bc7ebbad77d8c86b6925dcd45931dccb586dd9669d67b700810a442318458b49a617af3bcdb1ae1183184dc8598a6b8baf49c30f69c
SSDEEP 1536:sLsF2Kerc64sTiX2IV0DgsowGeP58ORX73iu/uC:sLy2Kerc64CiGIm8so28C
TLSH
T1B8535C2AA5A220B8C95780B0D5776B32D4397C350036767EA345FF312E71E12EB25E9E
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