juko | f760ecfb592b4212ade49fca3e7a9090a587bc8c5c3096b7d82ecb1eb76a5e47

General

Target
2026-08-23_abaeb7b04e56cd996a461da2a82d2e8d_elex_wannacry.exe
Size 64KB
Sample260824-car67ssblh
SHA256 f760ecfb592b4212ade49fca3e7a9090a587bc8c5c3096b7d82ecb1eb76a5e47
MD5 abaeb7b04e56cd996a461da2a82d2e8d
SHA1 57b380decf1570391a983222d2dc00b24660c6b5
SHA512 557ffbd90d434e31763b4df61f35cbce3a249ae549f346aec4601f96bd005283ac4f31c9d4c853544c1dc5b08190e155cafac214cab691984c0ad809935276a3
SSDEEP 1536:sLsF2Kerc64sTiX2IV0DgsowGeP58ORX73iu/uM:sLy2Kerc64CiGIm8so28M
TLSH
T148535C2EA5A220B8C95780B0D5776B32D4397C350036767EA345FF312E71E12EB25E9E
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/0x000600000001b6f0-4.dat	family_juko
behavioral2/files/0x000e00000001c559-10.dat	family_juko

Executes dropped EXE 2 IoCs

pid	Process
5560	WINWORD.exe
1500	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-1-5-21-3611646547-550105268-947503007-1000\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
2892	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	WINWORD.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-08-23_abaeb7b04e56cd996a461da2a82d2e8d_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

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
2892	cmd.exe
1776	PING.EXE
4772	PING.EXE
4104	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
1776	PING.EXE
4772	PING.EXE
4104	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3916 wrote to memory of 5560	3916	2026-08-23_abaeb7b04e56cd996a461da2a82d2e8d_elex_wannacry.exe	89
PID 5560 wrote to memory of 2892	5560	WINWORD.exe	90
PID 2892 wrote to memory of 1776	2892	cmd.exe	92
PID 2892 wrote to memory of 4772	2892	cmd.exe	93
PID 2892 wrote to memory of 4104	2892	cmd.exe	94
PID 2892 wrote to memory of 1500	2892	cmd.exe	95

C:\Users\Admin\AppData\Local\Temp\2026-08-23_abaeb7b04e56cd996a461da2a82d2e8d_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-08-23_abaeb7b04e56cd996a461da2a82d2e8d_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3916
- 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:5560
- - 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\00003920" 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:2892
  - - 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:1776
  - - 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:4772
  - - 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:4104
  - - 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:1500

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

00003920

Path C:\Users\Admin\AppData\Roaming\Mozilla\00003920
Size 64KB
SHA256 778bba6c25ffa306d34c7c07c5a68f302045f71c119ce3e8b5dafff72c82f08a
MD5 dd19ab802d88278bcf5c09a5d3910648
SHA1 8c2629a8f9b0129a5926ae87235d1285d0856425
SHA512 f2f19e257305da8e0ebcd5c5527a96108e12eec6761bdaf303e947e7ef497de692c6e0848d1ea3377695129d4455ce4808bcb33891a5852698363f2b22fbcab7
SSDEEP 1536:sLsF2Kerc64sTiX2IV0DgsowGeP58ORX73iu/uZ:sLy2Kerc64CiGIm8so28Z
TLSH
T113536C2AA5A220B8C95780B0D5776B32D4397C350036767EA345FF312E71E12EB25E9E
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 64KB
SHA256 f760ecfb592b4212ade49fca3e7a9090a587bc8c5c3096b7d82ecb1eb76a5e47
MD5 abaeb7b04e56cd996a461da2a82d2e8d
SHA1 57b380decf1570391a983222d2dc00b24660c6b5
SHA512 557ffbd90d434e31763b4df61f35cbce3a249ae549f346aec4601f96bd005283ac4f31c9d4c853544c1dc5b08190e155cafac214cab691984c0ad809935276a3
SSDEEP 1536:sLsF2Kerc64sTiX2IV0DgsowGeP58ORX73iu/uM:sLy2Kerc64CiGIm8so28M
TLSH
T148535C2EA5A220B8C95780B0D5776B32D4397C350036767EA345FF312E71E12EB25E9E
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