juko | be10077e578fba2ed10f9c31f08914ec12b2ae2e7e1501de3a6b1b04514d5065

General

Target
2026-07-28_9b3240f790d2c10d771bac066f7230de_elex_wannacry.exe
Size 37KB
Sample260728-2de4gscb96
SHA256 be10077e578fba2ed10f9c31f08914ec12b2ae2e7e1501de3a6b1b04514d5065
MD5 9b3240f790d2c10d771bac066f7230de
SHA1 098b04de05f10c00ac74e331059944bbc71621ce
SHA512 1ba617a355d2d89435fa183f30f7eb340bb14610333309b491fc4c4a399d45d0f8e91fac23eb3b35a048b05e0bebb3f07f756b043a62973485a279e68d829e42
SSDEEP 768:FZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqKNPWQHpZa5ywaI:3LsF2Kerc64sTiX2IV0Dhuogwn
TLSH
T1A4035C1A299160A2D55310B0E9D82FB4C53D8C76106BB062F740BE59A8B3CD7DF72BCE
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
behavioral2/memory/2364-0-0x0000000000400000-0x000000000041D000-memory.dmp	family_juko
behavioral2/files/0x001400000001c4ec-5.dat	family_juko
behavioral2/memory/2364-10-0x0000000000400000-0x000000000041D000-memory.dmp	family_juko
behavioral2/memory/4936-12-0x0000000000400000-0x000000000041D000-memory.dmp	family_juko
behavioral2/files/0x000d00000001c5d8-13.dat	family_juko
behavioral2/memory/4248-15-0x0000000000400000-0x000000000041D000-memory.dmp	family_juko
behavioral2/memory/4248-16-0x0000000000400000-0x000000000041D000-memory.dmp	family_juko

Executes dropped EXE 2 IoCs

pid	Process
4936	WINWORD.exe
4248	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-1-5-21-2246396966-3025826688-3847171515-1000\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
1440	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	2026-07-28_9b3240f790d2c10d771bac066f7230de_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
1440	cmd.exe
252	PING.EXE
3044	PING.EXE
4484	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
252	PING.EXE
3044	PING.EXE
4484	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2364 wrote to memory of 4936	2364	2026-07-28_9b3240f790d2c10d771bac066f7230de_elex_wannacry.exe	89
PID 4936 wrote to memory of 1440	4936	WINWORD.exe	90
PID 1440 wrote to memory of 252	1440	cmd.exe	92
PID 1440 wrote to memory of 3044	1440	cmd.exe	93
PID 1440 wrote to memory of 4484	1440	cmd.exe	94
PID 1440 wrote to memory of 4248	1440	cmd.exe	95

C:\Users\Admin\AppData\Local\Temp\2026-07-28_9b3240f790d2c10d771bac066f7230de_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-07-28_9b3240f790d2c10d771bac066f7230de_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2364
- 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:4936
- - 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\0000763B" 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:1440
  - - 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:252
  - - 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:3044
  - - 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:4484
  - - 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:4248

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k GPSvcGroup
1⤵
PID:2480

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

0000763B

Path C:\Users\Admin\AppData\Roaming\Mozilla\0000763B
Size 37KB
SHA256 43c9bad337a1bb02ef2fd1794b2ad00d3a40d07bff1e2be0b1f51a56a024db21
MD5 6fa29bf90b724abee0156148a2634897
SHA1 ccba81fbae5831942d21b305661c28b06e27326d
SHA512 5315567f20fe624ce449c8425595c18b32bb5b9d6a5c997edf85f71235b3e51cf6e9a8e39408f502f53a0c56cb79fa2a1bcf3ef905f812dad9a1a1ad105e6b7f
SSDEEP 768:FZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqKNPWQHpZa5ywaW:3LsF2Kerc64sTiX2IV0DhuogwV
TLSH
T18B035C1A299160A2D55310B0E9D82FB4C53D8C76106BB062F740BE59A8B3CD7DF72BCE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 37KB
SHA256 be10077e578fba2ed10f9c31f08914ec12b2ae2e7e1501de3a6b1b04514d5065
MD5 9b3240f790d2c10d771bac066f7230de
SHA1 098b04de05f10c00ac74e331059944bbc71621ce
SHA512 1ba617a355d2d89435fa183f30f7eb340bb14610333309b491fc4c4a399d45d0f8e91fac23eb3b35a048b05e0bebb3f07f756b043a62973485a279e68d829e42
SSDEEP 768:FZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqKNPWQHpZa5ywaI:3LsF2Kerc64sTiX2IV0Dhuogwn
TLSH
T1A4035C1A299160A2D55310B0E9D82FB4C53D8C76106BB062F740BE59A8B3CD7DF72BCE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/2364-0-0x0000000000400000-0x000000000041D000-memory.dmp

Download

memory/2364-10-0x0000000000400000-0x000000000041D000-memory.dmp

Download

memory/4248-15-0x0000000000400000-0x000000000041D000-memory.dmp

Download

memory/4248-16-0x0000000000400000-0x000000000041D000-memory.dmp

Download

memory/4936-12-0x0000000000400000-0x000000000041D000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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Downloads