farfli | 41ffab92e6f9db023dd055a79f6a70601eb2bb6fcd0a7623049d5c0b55103866

Analysis

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

arch:x64arch:x86image:win10v2004-20260513-enlocale:en-usos:windows10-2004-x64systemwindows
submitted
20/08/2026, 06:09

Sharing

Copy URL Twitter E-mail

Report Analysis Logs

General

Target
2026-08-20_08e8b1f4c44a8c5c1745f7d2a4c4be56_elex_wannacry.exe
Size 272KB
Sample260820-gwtpdatvay
SHA256 41ffab92e6f9db023dd055a79f6a70601eb2bb6fcd0a7623049d5c0b55103866
MD5 08e8b1f4c44a8c5c1745f7d2a4c4be56
SHA1 08eb66a598233382916ce98dfca0d36fdac151d5
SHA512 681132dabca84f15df30bc9dccbfa457efa764d25ab4c0ec84f482d94ea774ec4d527f3f420bee25fe5262ce0e36f340bf9ed4d6839a7f804377c549b95ebd94
SSDEEP 6144:H8AbwMmJOyOK5ZV7NHPR519jtr5a8MueZG7HP:PwVJOp8FNprdrMul7v
TLSH
T14354CF11F621C945E4724C3177AE59388764FC19EB0CA643E3F86B0FDC2EE96A93C256
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 3 IoCs

resource	yara_rule
behavioral1/memory/4336-11-0x0000000010000000-0x000000001003D000-memory.dmp	family_farfli
behavioral1/memory/4336-13-0x0000000010000000-0x000000001003D000-memory.dmp	family_farfli
behavioral1/memory/4336-17-0x0000000010000000-0x000000001003D000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 3 IoCs

resource	yara_rule
behavioral1/memory/4336-11-0x0000000010000000-0x000000001003D000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/4336-13-0x0000000010000000-0x000000001003D000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/4336-17-0x0000000010000000-0x000000001003D000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

UPX dump on OEP (original entry point) 6 IoCs

resource	yara_rule
behavioral1/memory/1456-7-0x0000000000400000-0x000000000043A000-memory.dmp	UPX
behavioral1/files/0x000300000001e6ec-8.dat	UPX
behavioral1/memory/4336-10-0x0000000010000000-0x000000001003D000-memory.dmp	UPX
behavioral1/memory/4336-11-0x0000000010000000-0x000000001003D000-memory.dmp	UPX
behavioral1/memory/4336-13-0x0000000010000000-0x000000001003D000-memory.dmp	UPX
behavioral1/memory/4336-17-0x0000000010000000-0x000000001003D000-memory.dmp	UPX

Badlisted process makes network request 3 IoCs

Network request originating from process or tool commonly abused by malware.

flow	pid	Process
13	4336	rundll32.exe
19	4336	rundll32.exe
20	4336	rundll32.exe

Deletes itself 1 IoCs

pid	Process
1456	bgrgulpt.exe

Executes dropped EXE 1 IoCs

pid	Process
1456	bgrgulpt.exe

Loads dropped DLL 1 IoCs

pid	Process
4336	rundll32.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-1-5-21-204488895-2999877624-296153668-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\EvtMgr = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\kcejm\\fytek.yef\",RAFlush"	rundll32.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)	\??\t:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\s:	rundll32.exe
File opened (read-only)	\??\v:	rundll32.exe
File opened (read-only)	\??\x:	rundll32.exe
File opened (read-only)	\??\g:	rundll32.exe
File opened (read-only)	\??\i:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\k:	rundll32.exe
File opened (read-only)	\??\l:	rundll32.exe
File opened (read-only)	\??\q:	rundll32.exe
File opened (read-only)	\??\z:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\o:	rundll32.exe
File opened (read-only)	\??\p:	rundll32.exe
File opened (read-only)	\??\w:	rundll32.exe
File opened (read-only)	\??\y:	rundll32.exe
File opened (read-only)	\??\a:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.exe
File opened (read-only)	\??\e:	rundll32.exe
File opened (read-only)	\??\h:	rundll32.exe
File opened (read-only)	\??\n:	rundll32.exe
File opened (read-only)	\??\r:	rundll32.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	rundll32.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/files/0x000300000001e6ec-8.dat	upx
behavioral1/memory/4336-10-0x0000000010000000-0x000000001003D000-memory.dmp	upx
behavioral1/memory/4336-11-0x0000000010000000-0x000000001003D000-memory.dmp	upx
behavioral1/memory/4336-13-0x0000000010000000-0x000000001003D000-memory.dmp	upx
behavioral1/memory/4336-17-0x0000000010000000-0x000000001003D000-memory.dmp	upx

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
1508	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	2026-08-20_08e8b1f4c44a8c5c1745f7d2a4c4be56_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	bgrgulpt.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.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
1508	cmd.exe
3244	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	rundll32.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	rundll32.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
3244	PING.EXE

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
4336	rundll32.exe
4336	rundll32.exe
4336	rundll32.exe
4336	rundll32.exe
4336	rundll32.exe
4336	rundll32.exe
4336	rundll32.exe
4336	rundll32.exe
4336	rundll32.exe
4336	rundll32.exe
4336	rundll32.exe
4336	rundll32.exe
4336	rundll32.exe
4336	rundll32.exe
4336	rundll32.exe
4336	rundll32.exe
4336	rundll32.exe
4336	rundll32.exe
4336	rundll32.exe
4336	rundll32.exe
4336	rundll32.exe
4336	rundll32.exe
4336	rundll32.exe
4336	rundll32.exe
4336	rundll32.exe
4336	rundll32.exe
4336	rundll32.exe
4336	rundll32.exe
4336	rundll32.exe
4336	rundll32.exe
4336	rundll32.exe
4336	rundll32.exe
4336	rundll32.exe
4336	rundll32.exe
4336	rundll32.exe
4336	rundll32.exe
4336	rundll32.exe
4336	rundll32.exe
4336	rundll32.exe
4336	rundll32.exe
4336	rundll32.exe
4336	rundll32.exe
4336	rundll32.exe
4336	rundll32.exe
4336	rundll32.exe
4336	rundll32.exe
4336	rundll32.exe
4336	rundll32.exe
4336	rundll32.exe
4336	rundll32.exe
4336	rundll32.exe
4336	rundll32.exe
4336	rundll32.exe
4336	rundll32.exe
4336	rundll32.exe
4336	rundll32.exe
4336	rundll32.exe
4336	rundll32.exe
4336	rundll32.exe
4336	rundll32.exe
4336	rundll32.exe
4336	rundll32.exe
4336	rundll32.exe
4336	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4336	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
4880	2026-08-20_08e8b1f4c44a8c5c1745f7d2a4c4be56_elex_wannacry.exe
1456	bgrgulpt.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 4880 wrote to memory of 1508	4880	2026-08-20_08e8b1f4c44a8c5c1745f7d2a4c4be56_elex_wannacry.exe	88
PID 1508 wrote to memory of 3244	1508	cmd.exe	90
PID 1508 wrote to memory of 1456	1508	cmd.exe	91
PID 1456 wrote to memory of 4336	1456	bgrgulpt.exe	92

C:\Users\Admin\AppData\Local\Temp\2026-08-20_08e8b1f4c44a8c5c1745f7d2a4c4be56_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-08-20_08e8b1f4c44a8c5c1745f7d2a4c4be56_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4880
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\bgrgulpt.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-20_08e8b1f4c44a8c5c1745f7d2a4c4be56_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:1508
- - 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:3244
- - C:\Users\Admin\AppData\Local\Temp\bgrgulpt.exe
    C:\Users\Admin\AppData\Local\Temp\\bgrgulpt.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-20_08e8b1f4c44a8c5c1745f7d2a4c4be56_elex_wannacry.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:1456
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\kcejm\fytek.yef",RAFlush C:\Users\Admin\AppData\Local\Temp\bgrgulpt.exe
      4⤵
      Badlisted process makes network request
      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:4336

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

bgrgulpt.exe

Path C:\Users\Admin\AppData\Local\Temp\bgrgulpt.exe
Size 272KB
SHA256 0d5d8f3cd80f48f997987516d4df76602b8ee11b09318c2939b20fc42fc46378
MD5 016014dbaa739dc2f7a9092f4c290abb
SHA1 fb3204af45dd37355a6b4998882fd698ceb0a58d
SHA512 f9ac526c99617720093c1a09d191533375ca2801bcd05b636fb690234a47ad7e0104c45175f64de14298e0b862ebe32b5c2141427d8a687926e393f06a16455b
SSDEEP 6144:H8AbwMmJOyOK5ZV7NHPR519jtr5a8MueZG7Ha:PwVJOp8FNprdrMul76
TLSH
T1FD54CF11F621C945E4724C3177AE59388764FC19EB0CA643E3F86B0FDC2EE96A93C256
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

fytek.yef

Path \??\c:\kcejm\fytek.yef
Size 81KB
SHA256 2973a0957bd204e123307415bade58f84cdf272c659048a99bf42dfdb563415a
MD5 fe3b1b222244f783fe9927ff16813c45
SHA1 69c88427b6fe1b75b4f5dc51d7dcce1bc438de9b
SHA512 ad16236d7b0bca4f021d031c8c75c5a339218f6e27dd8be62dfc3719cf945ba832ec6c4c04483622431ed545125415ca03a636a22b2d4f13cc9545fffbe7bd64
SSDEEP 1536:gz2wGkhJuwe4428NPz+Sczth8kgodmbxLhevko1pLHKDwJ:gzzTw4kN7TEtmbFhebJKsJ
TLSH
T1D783AD8AEB9E4B3EE84D4633AD929D31DC27FB5526588F7A43FC102CEE46752B200107
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/1456-7-0x0000000000400000-0x000000000043A000-memory.dmp

Download

memory/4336-10-0x0000000010000000-0x000000001003D000-memory.dmp

Download

memory/4336-11-0x0000000010000000-0x000000001003D000-memory.dmp

Download

memory/4336-13-0x0000000010000000-0x000000001003D000-memory.dmp

Download

memory/4336-17-0x0000000010000000-0x000000001003D000-memory.dmp

Download

memory/4880-0-0x0000000000400000-0x000000000043A000-memory.dmp

Download

memory/4880-2-0x0000000000400000-0x000000000043A000-memory.dmp

Download