farfli | b07eb83490112d8268e4a620dcdc554e8605300fbab387f4da62531add7680b0

Analysis

max time kernel
149s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20260513-en
resource tags

arch:x64arch:x86image:win10v2004-20260513-enlocale:en-usos:windows10-2004-x64systemwindows
submitted
12/08/2026, 04:31

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General

Target
2026-08-12_781709087102d797e544c9a2ab7cb98e_elex_wannacry.exe
Size 402KB
Sample260812-e5wtzsal8v
SHA256 b07eb83490112d8268e4a620dcdc554e8605300fbab387f4da62531add7680b0
MD5 781709087102d797e544c9a2ab7cb98e
SHA1 bf82d4e88d51800539390121c27ecbdf7c5d2c18
SHA512 568324e5fe27e08547bcedb461946e084e07036f8c35fe45aa0c2204459e2e187656a19b5dee23110b7986b1b6985ed93770f35e740f014c8f811a8a578d08f8
SSDEEP 6144:JtecHBTSpjVfs3mCL17O/cvARZZWcStoWwABr8iXpXxr2kDQH/9M:nHBTwjBqbYkvqZMcV7i32ie
TLSH
T16E94DF2332C1C8B7C1D17373FEE2A672E3F5C2A85D356A7753EA014D1E2744C92562A9
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

backdoor bootkit discovery execution farfli persistence spyware stealer upx

Malware Config

Signatures

Family: Farfli
Farfli is a Windows backdoor written in C++.
backdoor farfli

Detects Farfli Backdoor 5 IoCs

resource	yara_rule
behavioral1/memory/2532-16-0x0000000010000000-0x000000001005A000-memory.dmp	family_farfli
behavioral1/memory/2532-18-0x0000000010000000-0x000000001005A000-memory.dmp	family_farfli
behavioral1/memory/2532-20-0x0000000010000000-0x000000001005A000-memory.dmp	family_farfli
behavioral1/memory/2532-23-0x0000000010000000-0x000000001005A000-memory.dmp	family_farfli
behavioral1/memory/2532-26-0x0000000010000000-0x000000001005A000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 5 IoCs

resource	yara_rule
behavioral1/memory/2532-16-0x0000000010000000-0x000000001005A000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/2532-18-0x0000000010000000-0x000000001005A000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/2532-20-0x0000000010000000-0x000000001005A000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/2532-23-0x0000000010000000-0x000000001005A000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/2532-26-0x0000000010000000-0x000000001005A000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

Deletes itself 1 IoCs

pid	Process
3384	tiugstjde.exe

Executes dropped EXE 2 IoCs

pid	Process
3384	tiugstjde.exe
2532	ypnw.exe

Loads dropped DLL 1 IoCs

pid	Process
2532	ypnw.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-1-5-21-1074038928-2032447174-945360078-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\DESIME = "c:\\Program Files\\csqyyuprr\\ypnw.exe \"c:\\Program Files\\csqyyuprr\\ypnws.dll\",DoPrivacy"	ypnw.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)	\??\e:	ypnw.exe
File opened (read-only)	\??\g:	ypnw.exe
File opened (read-only)	\??\h:	ypnw.exe
File opened (read-only)	\??\u:	ypnw.exe
File opened (read-only)	\??\z:	ypnw.exe
File opened (read-only)	\??\l:	ypnw.exe
File opened (read-only)	\??\p:	ypnw.exe
File opened (read-only)	\??\r:	ypnw.exe
File opened (read-only)	\??\i:	ypnw.exe
File opened (read-only)	\??\j:	ypnw.exe
File opened (read-only)	\??\k:	ypnw.exe
File opened (read-only)	\??\n:	ypnw.exe
File opened (read-only)	\??\o:	ypnw.exe
File opened (read-only)	\??\s:	ypnw.exe
File opened (read-only)	\??\x:	ypnw.exe
File opened (read-only)	\??\a:	ypnw.exe
File opened (read-only)	\??\m:	ypnw.exe
File opened (read-only)	\??\q:	ypnw.exe
File opened (read-only)	\??\t:	ypnw.exe
File opened (read-only)	\??\v:	ypnw.exe
File opened (read-only)	\??\w:	ypnw.exe
File opened (read-only)	\??\y:	ypnw.exe
File opened (read-only)	\??\b:	ypnw.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	ypnw.exe

UPX packed file 4 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral1/memory/5016-0-0x0000000000400000-0x0000000000499000-memory.dmp	upx
behavioral1/memory/5016-2-0x0000000000400000-0x0000000000499000-memory.dmp	upx
behavioral1/files/0x0008000000024480-4.dat	upx
behavioral1/memory/3384-10-0x0000000000400000-0x0000000000499000-memory.dmp	upx

Drops file in Program Files directory 4 IoCs

description	ioc	Process
File opened for modification	\??\c:\Program Files\csqyyuprr	tiugstjde.exe
File created	\??\c:\Program Files\csqyyuprr\ypnws.dll	tiugstjde.exe
File created	\??\c:\Program Files\csqyyuprr\ypnw.exe	tiugstjde.exe
File opened for modification	\??\c:\Program Files\csqyyuprr\ypnw.exe	tiugstjde.exe

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
4216	cmd.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	2026-08-12_781709087102d797e544c9a2ab7cb98e_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	tiugstjde.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	ypnw.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
4216	cmd.exe
2892	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 opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	ypnw.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	ypnw.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2892	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2532	ypnw.exe
2532	ypnw.exe
2532	ypnw.exe
2532	ypnw.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2532	ypnw.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
5016	2026-08-12_781709087102d797e544c9a2ab7cb98e_elex_wannacry.exe
3384	tiugstjde.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 5016 wrote to memory of 4216	5016	2026-08-12_781709087102d797e544c9a2ab7cb98e_elex_wannacry.exe	86
PID 4216 wrote to memory of 2892	4216	cmd.exe	88
PID 4216 wrote to memory of 3384	4216	cmd.exe	89
PID 3384 wrote to memory of 2532	3384	tiugstjde.exe	90

C:\Users\Admin\AppData\Local\Temp\2026-08-12_781709087102d797e544c9a2ab7cb98e_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-08-12_781709087102d797e544c9a2ab7cb98e_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:5016
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\tiugstjde.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-12_781709087102d797e544c9a2ab7cb98e_elex_wannacry.exe"
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:4216
- - 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:2892
- - C:\Users\Admin\AppData\Local\Temp\tiugstjde.exe
    C:\Users\Admin\AppData\Local\Temp\\tiugstjde.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-12_781709087102d797e544c9a2ab7cb98e_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:3384
  - - \??\c:\Program Files\csqyyuprr\ypnw.exe
      "c:\Program Files\csqyyuprr\ypnw.exe" "c:\Program Files\csqyyuprr\ypnws.dll",DoPrivacy C:\Users\Admin\AppData\Local\Temp\tiugstjde.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:2532

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

Windows Command Shell

T1059.003

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

ypnw.exe

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

Submit Download

ypnws.dll

Path C:\Program Files\csqyyuprr\ypnws.dll
Size 219KB
SHA256 b98848d687c6f32b2c9e17534b29b82117b5d0b91d06516a5ae2ddf34aa725e6
MD5 fa15514d7925aa31acfc4758b42dae97
SHA1 703015d31f4f9e153d7fa2f8172149b71eecbbcb
SHA512 f9db8ed25fc6eb7a3c26f611d0ac11c9341f6b8c27a5304050f5c9426ecf203e8d6e5360b9770f24f56c05e2999b2e46cc4008a924812764dfb0af6d5268c741
SSDEEP 6144:XxDink0qeQKc/A8MNfnX2p2KL5aI3iMKX:XAk9uNfnX2p2Q5aIxC
TLSH
T1CA2413C4FF52EECEE8610AF03B4FA269DF705C6BC48202C114EE58535A65EA3F695705
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

tiugstjde.exe

Path C:\Users\Admin\AppData\Local\Temp\tiugstjde.exe
Size 402KB
SHA256 340686d4e7b58120cc255a63a9b9c14060c5bfb2578321beb7441d02acbe49e2
MD5 c8c60118bea25d74c2758a80d7e0384c
SHA1 76f03ea5a80f809ae702a30b8c44ad50cb4db83c
SHA512 4ac6450f3d2c2aa852c2b7e05613b7c28dafe57a23b84c5d0b77d434e3c7de0e7c4a1d19a68d395dfae4755c5f62a967761dfc948d2f56a67f253dea3c6eb136
SSDEEP 6144:JtecHBTSpjVfs3mCL17O/cvARZZWcStoWwABr8iXpXxr2kDQH/9MN:nHBTwjBqbYkvqZMcV7i32ieG
TLSH
T1AB94CF2332C1C8B7C1D17373FEE2AA72E3F5C2A85D356A7753EA014D1E2744C92562A9
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/2532-18-0x0000000010000000-0x000000001005A000-memory.dmp

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memory/2532-14-0x0000000010000000-0x000000001005A000-memory.dmp

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memory/2532-15-0x0000000000840000-0x0000000000841000-memory.dmp

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memory/2532-16-0x0000000010000000-0x000000001005A000-memory.dmp

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memory/2532-20-0x0000000010000000-0x000000001005A000-memory.dmp

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memory/2532-21-0x0000000000840000-0x0000000000841000-memory.dmp

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memory/2532-23-0x0000000010000000-0x000000001005A000-memory.dmp

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memory/2532-26-0x0000000010000000-0x000000001005A000-memory.dmp

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memory/3384-10-0x0000000000400000-0x0000000000499000-memory.dmp

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memory/5016-2-0x0000000000400000-0x0000000000499000-memory.dmp

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memory/5016-0-0x0000000000400000-0x0000000000499000-memory.dmp

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