farfli | bf66cec19c2360cf7e8276185a2f09bc8f87d12d9ef849fffff9dc6b6dc95bda

Analysis

max time kernel
148s
max time network
139s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260709-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
29/07/2026, 00:47

Sharing

Copy URL Twitter E-mail

Report Analysis Logs

General

Target
2026-07-28_8dac4e4449fd7a152df8b1c7be6d1397_elex_wannacry.exe
Size 405KB
Sample260729-a5bftsdn3s
SHA256 bf66cec19c2360cf7e8276185a2f09bc8f87d12d9ef849fffff9dc6b6dc95bda
MD5 8dac4e4449fd7a152df8b1c7be6d1397
SHA1 f57473e94662ba16fae1881203749048c7d56c13
SHA512 3e06164fcfb40017740b1b532e54e394e1e8818e97a162fe0460b00f9acb3aafb21e269d3bd6c057e171cffe00082f401f1ae73474caf6555a213f1123159096
SSDEEP 6144:JtecHBTSpjVfs3mCL17O/cvARZZWcStoWwABr8iXpXxr2kDQH/9k:nHBTwjBqbYkvqZMcV7i32ie
TLSH
T19E94CF2332C1C8B7C1D17373FEE2A672E3F5C2A85D356A7753EA025D1E2744C92162A9
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 6 IoCs

resource	yara_rule
behavioral2/memory/4364-10-0x0000000010000000-0x000000001005A000-memory.dmp	family_farfli
behavioral2/memory/4364-12-0x0000000010000000-0x000000001005A000-memory.dmp	family_farfli
behavioral2/memory/4364-14-0x0000000010000000-0x000000001005A000-memory.dmp	family_farfli
behavioral2/memory/4364-17-0x0000000010000000-0x000000001005A000-memory.dmp	family_farfli
behavioral2/memory/4364-19-0x0000000010000000-0x000000001005A000-memory.dmp	family_farfli
behavioral2/memory/4364-22-0x0000000010000000-0x000000001005A000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 6 IoCs

resource	yara_rule
behavioral2/memory/4364-10-0x0000000010000000-0x000000001005A000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/4364-12-0x0000000010000000-0x000000001005A000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/4364-14-0x0000000010000000-0x000000001005A000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/4364-17-0x0000000010000000-0x000000001005A000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/4364-19-0x0000000010000000-0x000000001005A000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/4364-22-0x0000000010000000-0x000000001005A000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

Deletes itself 1 IoCs

pid	Process
6028	zsyrucs.exe

Executes dropped EXE 2 IoCs

pid	Process
6028	zsyrucs.exe
4364	sel.exe

Loads dropped DLL 1 IoCs

pid	Process
4364	sel.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-1-5-21-1079202589-886135813-2527035092-1000\Software\Microsoft\Windows\CurrentVersion\Run\DESIME = "c:\\Program Files\\xnngjpljg\\sel.exe \"c:\\Program Files\\xnngjpljg\\rorkf.dll\",DoPrivacy"	sel.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)	\??\l:	sel.exe
File opened (read-only)	\??\m:	sel.exe
File opened (read-only)	\??\o:	sel.exe
File opened (read-only)	\??\p:	sel.exe
File opened (read-only)	\??\u:	sel.exe
File opened (read-only)	\??\x:	sel.exe
File opened (read-only)	\??\i:	sel.exe
File opened (read-only)	\??\j:	sel.exe
File opened (read-only)	\??\r:	sel.exe
File opened (read-only)	\??\s:	sel.exe
File opened (read-only)	\??\q:	sel.exe
File opened (read-only)	\??\b:	sel.exe
File opened (read-only)	\??\h:	sel.exe
File opened (read-only)	\??\k:	sel.exe
File opened (read-only)	\??\n:	sel.exe
File opened (read-only)	\??\w:	sel.exe
File opened (read-only)	\??\y:	sel.exe
File opened (read-only)	\??\z:	sel.exe
File opened (read-only)	\??\a:	sel.exe
File opened (read-only)	\??\d:	sel.exe
File opened (read-only)	\??\g:	sel.exe
File opened (read-only)	\??\t:	sel.exe
File opened (read-only)	\??\v:	sel.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	sel.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4380-0-0x0000000000400000-0x0000000000499000-memory.dmp	upx
behavioral2/memory/4380-2-0x0000000000400000-0x0000000000499000-memory.dmp	upx
behavioral2/files/0x001b0000000187a6-3.dat	upx
behavioral2/memory/6028-7-0x0000000000400000-0x0000000000499000-memory.dmp	upx

Drops file in Program Files directory 3 IoCs

description	ioc	Process
File created	\??\c:\Program Files\xnngjpljg\sel.exe	zsyrucs.exe
File opened for modification	\??\c:\Program Files\xnngjpljg	zsyrucs.exe
File created	\??\c:\Program Files\xnngjpljg\rorkf.dll	zsyrucs.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
5104	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	2026-07-28_8dac4e4449fd7a152df8b1c7be6d1397_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	zsyrucs.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sel.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
5104	cmd.exe
4400	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	sel.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	sel.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
4400	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
4364	sel.exe
4364	sel.exe
4364	sel.exe
4364	sel.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4364	sel.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
4380	2026-07-28_8dac4e4449fd7a152df8b1c7be6d1397_elex_wannacry.exe
6028	zsyrucs.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 4380 wrote to memory of 5104	4380	2026-07-28_8dac4e4449fd7a152df8b1c7be6d1397_elex_wannacry.exe	89
PID 5104 wrote to memory of 4400	5104	cmd.exe	91
PID 5104 wrote to memory of 6028	5104	cmd.exe	92
PID 6028 wrote to memory of 4364	6028	zsyrucs.exe	93

C:\Users\Admin\AppData\Local\Temp\2026-07-28_8dac4e4449fd7a152df8b1c7be6d1397_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-07-28_8dac4e4449fd7a152df8b1c7be6d1397_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4380
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\zsyrucs.exe "C:\Users\Admin\AppData\Local\Temp\2026-07-28_8dac4e4449fd7a152df8b1c7be6d1397_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:5104
- - 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:4400
- - C:\Users\Admin\AppData\Local\Temp\zsyrucs.exe
    C:\Users\Admin\AppData\Local\Temp\\zsyrucs.exe "C:\Users\Admin\AppData\Local\Temp\2026-07-28_8dac4e4449fd7a152df8b1c7be6d1397_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:6028
  - - \??\c:\Program Files\xnngjpljg\sel.exe
      "c:\Program Files\xnngjpljg\sel.exe" "c:\Program Files\xnngjpljg\rorkf.dll",DoPrivacy C:\Users\Admin\AppData\Local\Temp\zsyrucs.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:4364

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

Loading Replay Monitor...

Downloads

sel.exe

Path C:\Program Files\xnngjpljg\sel.exe
Size 51KB
SHA256 ce6bb7eddc83762c708d4a41709ae00371dbdc09b2a380f28fa60b1edf917473
MD5 2e068ce2770fde8d1af4cb114b98df1f
SHA1 b6f9c2775babb025b22f915c3047aa627d07c312
SHA512 998d695eb56375e63df7db16740b89deb2cf630ccbead8bcf84a921ec6f4a4f9aef2755b703f7190f332b2008ebcc949363bcf8f392d7d07246c255b5073ed35
SSDEEP 1536:6G9yoVEpHP29I3fbcJboSUge5N+CnC/maz9Rh:8pv2mbcJboce58wvOR
TLSH
T137336C236A0A49B3DFE231780A9D7232526DD862075541F7A61057EAFD243E2EE743CF
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

zsyrucs.exe

Path C:\Users\Admin\AppData\Local\Temp\zsyrucs.exe
Size 405KB
SHA256 40226dc788aa5d17e96c624a4c6b9ef9f8b83af235a1f2ccfc59cce18c7dd1fe
MD5 67b59dc62bdd4a62a8ecf2f6d0a1cb9f
SHA1 b17f2dd4a04f81ec373688c16881dd7c6b0fc1d3
SHA512 ad21e9f4b639ab48e6c14b11931eeb4ea0959f6ec837fd4f1639de9f84a8584fa43dd2d12ac23f2bc3756c560b18cd75385ccd072cf9ab017660736a5ca62a63
SSDEEP 6144:JtecHBTSpjVfs3mCL17O/cvARZZWcStoWwABr8iXpXxr2kDQH/9k0:nHBTwjBqbYkvqZMcV7i32ieP
TLSH
T19594CF2332C1C8B7C1D17373FEE2A672E3F5C2A85D356A7753EA025D1E2744C92162A9
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

rorkf.dll

Path \??\c:\Program Files\xnngjpljg\rorkf.dll
Size 219KB
SHA256 6eb112eb691b7c7faac165e63d7b837c925d00d11e6afedace31a69a11be187f
MD5 e746f7f08016f3bd9ed273edcb3c4823
SHA1 63c8470d0bbb8bf053da7d8b22df3383eb26f141
SHA512 660437e7687e3087c8f622ad9d6084add25b60c646afb6a9abc1c21ed7018358feca6f4c6a01008762c9b788143bb43104f794f9752ecea27a39094f76ea8ede
SSDEEP 6144:XxDink0qeQKc/A8MNfnX2p2KL5aI3iMKr:XAk9uNfnX2p2Q5aIx0
TLSH
T1672413C4FF52EECEE8610AF03B4FA269DF705C6BC48202C114EE58535A65EA3F695705
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/4364-14-0x0000000010000000-0x000000001005A000-memory.dmp

Download

memory/4364-11-0x00000000009F0000-0x00000000009F1000-memory.dmp

Download

memory/4364-10-0x0000000010000000-0x000000001005A000-memory.dmp

Download

memory/4364-12-0x0000000010000000-0x000000001005A000-memory.dmp

Download

memory/4364-16-0x00000000009F0000-0x00000000009F1000-memory.dmp

Download

memory/4364-17-0x0000000010000000-0x000000001005A000-memory.dmp

Download

memory/4364-19-0x0000000010000000-0x000000001005A000-memory.dmp

Download

memory/4364-22-0x0000000010000000-0x000000001005A000-memory.dmp

Download

memory/4380-2-0x0000000000400000-0x0000000000499000-memory.dmp

Download

memory/4380-0-0x0000000000400000-0x0000000000499000-memory.dmp

Download

memory/6028-7-0x0000000000400000-0x0000000000499000-memory.dmp

Download