3270c611c29b33bff04e705ed10f0786e26bbaed8ad1c3ad7ebcc909344bca24

Analysis

max time kernel
149s
max time network
147s
platform
windows10-2004_x64
resource
win10v2004-20260130-en
resource tags

arch:x64arch:x86image:win10v2004-20260130-enlocale:en-usos:windows10-2004-x64systemwindows
submitted
23/04/2026, 22:06

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General

Target
2026-04-23_b5820c916c26da34a7366f1e7564692d_elex_wannacry.exe
Size 681KB
Sample260423-11k3ksaw21
SHA256 3270c611c29b33bff04e705ed10f0786e26bbaed8ad1c3ad7ebcc909344bca24
MD5 b5820c916c26da34a7366f1e7564692d
SHA1 61572c59c5c27b192a389d336f81242fb8bc1d32
SHA512 68f552b06f0a33f02361dcfc9ed1c0a34ce5e74c02cbb565018b3baa0d1ca55787dd66cb7fcfce44882e12d9658fcf89911c190f7222845719bcaf59c059537a
SSDEEP 12288:cSfSps28tL4l4Xzqs4f2S3heRW2ULNLw6VNCsJlgDrEo:f0O0WX1rSxIW2oNxmYlgDrEo
TLSH
T182E4F11272C899A6CC096432CB62A678F6E7CDC84F228EE75384763D8B36584D73F574
MD5 SHA1 SHA512 SSDEEP TLSH

Score

9^/10

bootkit discovery persistence spyware stealer

Malware Config

Signatures

Custom signature

Detects executables containing base64 encoded User Agent 6 IoCs

resource	yara_rule
behavioral1/memory/3968-18-0x0000000010000000-0x000000001005F000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/3968-16-0x0000000010000000-0x000000001005F000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/3968-14-0x0000000010000000-0x000000001005F000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/3968-20-0x0000000010000000-0x000000001005F000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/3968-22-0x0000000010000000-0x000000001005F000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/3968-25-0x0000000010000000-0x000000001005F000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

Deletes itself 1 IoCs

pid	Process
5036	ufclqphyi.exe

Executes dropped EXE 2 IoCs

pid	Process
5036	ufclqphyi.exe
3968	ynwgn.exe

Loads dropped DLL 1 IoCs

pid	Process
3968	ynwgn.exe

Reads user/profile data of web browsers 3 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

Credentials from Web Browsers
T1555.003

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-1-5-21-721190819-434563495-2007910846-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Disp = "c:\\Program Files\\pjllrc\\ynwgn.exe \"c:\\Program Files\\pjllrc\\ynwgn.dll\",Dispatch"	ynwgn.exe

Enumerates connected drives 3 TTPs 23 IoCs

Attempts to read the root path of hard drives other than the default C: drive.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

description	ioc	Process
File opened (read-only)	\??\p:	ynwgn.exe
File opened (read-only)	\??\i:	ynwgn.exe
File opened (read-only)	\??\o:	ynwgn.exe
File opened (read-only)	\??\r:	ynwgn.exe
File opened (read-only)	\??\s:	ynwgn.exe
File opened (read-only)	\??\x:	ynwgn.exe
File opened (read-only)	\??\j:	ynwgn.exe
File opened (read-only)	\??\k:	ynwgn.exe
File opened (read-only)	\??\q:	ynwgn.exe
File opened (read-only)	\??\t:	ynwgn.exe
File opened (read-only)	\??\v:	ynwgn.exe
File opened (read-only)	\??\a:	ynwgn.exe
File opened (read-only)	\??\b:	ynwgn.exe
File opened (read-only)	\??\h:	ynwgn.exe
File opened (read-only)	\??\l:	ynwgn.exe
File opened (read-only)	\??\m:	ynwgn.exe
File opened (read-only)	\??\n:	ynwgn.exe
File opened (read-only)	\??\u:	ynwgn.exe
File opened (read-only)	\??\y:	ynwgn.exe
File opened (read-only)	\??\e:	ynwgn.exe
File opened (read-only)	\??\g:	ynwgn.exe
File opened (read-only)	\??\w:	ynwgn.exe
File opened (read-only)	\??\z:	ynwgn.exe

Writes to the Master Boot Record (MBR) 1 TTPs 1 IoCs

Bootkits write to the MBR to gain persistence at a level below the operating system.

bootkit persistence

Bootkit

T1542.003

description	ioc	Process
File opened for modification	\??\PHYSICALDRIVE0	ynwgn.exe

Drops file in Program Files directory 4 IoCs

description	ioc	Process
File opened for modification	\??\c:\Program Files\pjllrc	ufclqphyi.exe
File created	\??\c:\Program Files\pjllrc\ynwgn.dll	ufclqphyi.exe
File created	\??\c:\Program Files\pjllrc\ynwgn.exe	ufclqphyi.exe
File opened for modification	\??\c:\Program Files\pjllrc\ynwgn.exe	ufclqphyi.exe

System Location Discovery: System Language Discovery 1 TTPs 5 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	2026-04-23_b5820c916c26da34a7366f1e7564692d_elex_wannacry.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	ufclqphyi.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	ynwgn.exe

System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 2 IoCs

Adversaries may check for Internet connectivity on compromised systems.

discovery

Internet Connection Discovery

T1016.001

pid	Process
5736	cmd.exe
3392	PING.EXE

Checks processor information in registry 2 TTPs 2 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	ynwgn.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	ynwgn.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
3392	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
3968	ynwgn.exe
3968	ynwgn.exe
3968	ynwgn.exe
3968	ynwgn.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3968	ynwgn.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
5424	2026-04-23_b5820c916c26da34a7366f1e7564692d_elex_wannacry.exe
5036	ufclqphyi.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 5424 wrote to memory of 5736	5424	2026-04-23_b5820c916c26da34a7366f1e7564692d_elex_wannacry.exe	86
PID 5736 wrote to memory of 3392	5736	cmd.exe	88
PID 5736 wrote to memory of 5036	5736	cmd.exe	89
PID 5036 wrote to memory of 3968	5036	ufclqphyi.exe	90

C:\Users\Admin\AppData\Local\Temp\2026-04-23_b5820c916c26da34a7366f1e7564692d_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-04-23_b5820c916c26da34a7366f1e7564692d_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:5424
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\ufclqphyi.exe "C:\Users\Admin\AppData\Local\Temp\2026-04-23_b5820c916c26da34a7366f1e7564692d_elex_wannacry.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:5736
- - C:\Windows\SysWOW64\PING.EXE
    ping 127.0.0.1 -n 2
    3⤵
    - System Location Discovery: System Language Discovery
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:3392
- - C:\Users\Admin\AppData\Local\Temp\ufclqphyi.exe
    C:\Users\Admin\AppData\Local\Temp\\ufclqphyi.exe "C:\Users\Admin\AppData\Local\Temp\2026-04-23_b5820c916c26da34a7366f1e7564692d_elex_wannacry.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - Drops file in Program Files directory
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:5036
  - - \??\c:\Program Files\pjllrc\ynwgn.exe
      "c:\Program Files\pjllrc\ynwgn.exe" "c:\Program Files\pjllrc\ynwgn.dll",Dispatch C:\Users\Admin\AppData\Local\Temp\ufclqphyi.exe
      4⤵
      Executes dropped EXE
      Loads dropped DLL
      Adds Run key to start application
      Enumerates connected drives
      Writes to the Master Boot Record (MBR)
      System Location Discovery: System Language Discovery
      Checks processor information in registry
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:3968

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Pre-OS Boot

T1542

Bootkit

T1542.003

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Pre-OS Boot

T1542

Bootkit

T1542.003

Credential Access

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Peripheral Device Discovery

T1120

Query Registry

T1012

Remote System Discovery

T1018

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

System Network Configuration Discovery

T1016

Internet Connection Discovery

T1016.001

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

ynwgn.exe

Path C:\Program Files\pjllrc\ynwgn.exe
Size 60KB
SHA256 6cbe0e1f046b13b29bfa26f8b368281d2dda7eb9b718651d5856f22cc3e02910
MD5 889b99c52a60dd49227c5e485a016679
SHA1 8fa889e456aa646a4d0a4349977430ce5fa5e2d7
SHA512 08933106eaf338dd119c45cbf1f83e723aff77cc0f8d3fc84e36253b1eb31557a54211d1d5d1cb58958188e32064d451f6c66a24b3963cccd3de07299ab90641
SSDEEP 1536:H9ykYCTdiHQKrFXmw2RQln5IUmDjoX6+:HlMHprF2nRQln5I
TLSH
T127532AC2FA00C171D4A7563019778F1A5766AC13DB728ACB94B0B4A41EB3291AD3E5FF
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

ufclqphyi.exe

Path C:\Users\Admin\AppData\Local\Temp\ufclqphyi.exe
Size 682KB
SHA256 eee3ea3689fb0d76f3f5ea51de0634a288a7a40382225ecc2e00c473ceb36de3
MD5 6e624d7803e110001e44ab8065866b71
SHA1 d61a282ac56ff6e728d9dec41ceb9a94c0c7f346
SHA512 ca5421773a20f9d9b8ed4b569cf4eeba481bf814ca2530eb533227484083101389734a4329456a38d36ed725f264c4d75b0c26d3e467f6979c75fc10f0a51104
SSDEEP 12288:cSfSps28tL4l4Xzqs4f2S3heRW2ULNLw6VNCsJlgDrEe:f0O0WX1rSxIW2oNxmYlgDrEe
TLSH
T1FDE4F11272C899A6CC096432CB62A678F6E7CDC84F228EE75384763D8B36584D73F574
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

ynwgn.dll

Path \??\c:\Program Files\pjllrc\ynwgn.dll
Size 210KB
SHA256 9adfbd451ef9c9496e49204a4d3f4ef7a0fdb073813fd07fc2f93960fc3606bc
MD5 c5f0bff41846893a03fbef27c025ce30
SHA1 fc724019ad8e4334e19cb45efd58360b894ffc07
SHA512 684642be60f5b904f9543f4436dee4fa61515651ff1822060596532bdcb96924def214c5cdaad70fb2a89f2cc9985b748643e5ad59e245a0cb550af84c4011f5
SSDEEP 3072:MI/38csWuZwCMZ9kfuZJR+go6+n05NkxbmUVg/GXJb8Rps6T++:9MIuSrZJR+gopn6sCShm++
TLSH
T1D424F14EF980DF6BC80E0534D86F6675ADA1294B5E21836F2B4CE30E3DF2B381516E95
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/3968-18-0x0000000010000000-0x000000001005F000-memory.dmp

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memory/3968-17-0x0000000002870000-0x0000000002872000-memory.dmp

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memory/3968-16-0x0000000010000000-0x000000001005F000-memory.dmp

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memory/3968-14-0x0000000010000000-0x000000001005F000-memory.dmp

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memory/3968-20-0x0000000010000000-0x000000001005F000-memory.dmp

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memory/3968-22-0x0000000010000000-0x000000001005F000-memory.dmp

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memory/3968-25-0x0000000010000000-0x000000001005F000-memory.dmp

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memory/5036-10-0x0000000000400000-0x00000000004A0000-memory.dmp

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memory/5424-2-0x0000000000400000-0x00000000004A0000-memory.dmp

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memory/5424-0-0x0000000000400000-0x00000000004A0000-memory.dmp

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