farfli | 23bcf61cd8cc970fdf9dd33424c96cad0d1586c77d94d49277fc4a4ade481c7b

Analysis

max time kernel
148s
max time network
137s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260911-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260911-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
04/11/2026, 00:56

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General

Target
2026-11-03_ff1806110349801165b26b7dcfe13a7e_elex_wannacry.exe
Size 403KB
Sample261104-basmas1y2k
SHA256 23bcf61cd8cc970fdf9dd33424c96cad0d1586c77d94d49277fc4a4ade481c7b
MD5 ff1806110349801165b26b7dcfe13a7e
SHA1 25e4a8e1f90e47ef4526d00a196c43a8420bf1a5
SHA512 39a9c5d426eabd65e2b2a93580ba9fdae856fffc636320d39f0ebe10cf70daa262f723557fadb6110ed3b305b44cf689059e19f9323a1bf9ac4114b3ad108463
SSDEEP 6144:JtecHBTSpjVfs3mCL17O/cvARZZWcStoWwABr8iXpXxr2kDQH/9C:nHBTwjBqbYkvqZMcV7i32iec
TLSH
T19D94CF2332C1C8A7C1D17373FEE2B672E3F5C2A85D356A7753EA015D1E2B44C92162A9
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

backdoor bootkit defense_evasion 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/4924-14-0x0000000010000000-0x000000001005A000-memory.dmp	family_farfli
behavioral2/memory/4924-12-0x0000000010000000-0x000000001005A000-memory.dmp	family_farfli
behavioral2/memory/4924-10-0x0000000010000000-0x000000001005A000-memory.dmp	family_farfli
behavioral2/memory/4924-16-0x0000000010000000-0x000000001005A000-memory.dmp	family_farfli
behavioral2/memory/4924-18-0x0000000010000000-0x000000001005A000-memory.dmp	family_farfli
behavioral2/memory/4924-21-0x0000000010000000-0x000000001005A000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 6 IoCs

resource	yara_rule
behavioral2/memory/4924-14-0x0000000010000000-0x000000001005A000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/4924-12-0x0000000010000000-0x000000001005A000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/4924-10-0x0000000010000000-0x000000001005A000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/4924-16-0x0000000010000000-0x000000001005A000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/4924-18-0x0000000010000000-0x000000001005A000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/4924-21-0x0000000010000000-0x000000001005A000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

Deletes itself 1 TTPs 1 IoCs

defense_evasion

File Deletion

T1070.004

pid	Process
6084	jfrhbpz.exe

Executes dropped EXE 2 IoCs

pid	Process
6084	jfrhbpz.exe
4924	tafhsv.exe

Loads dropped DLL 1 IoCs

pid	Process
4924	tafhsv.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-1-5-21-560646293-820748483-2532804640-1000\Software\Microsoft\Windows\CurrentVersion\Run\DESIME = "c:\\Program Files\\utqty\\tafhsv.exe \"c:\\Program Files\\utqty\\tafhsv.dll\",DoPrivacy"	tafhsv.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:	tafhsv.exe
File opened (read-only)	\??\s:	tafhsv.exe
File opened (read-only)	\??\q:	tafhsv.exe
File opened (read-only)	\??\d:	tafhsv.exe
File opened (read-only)	\??\g:	tafhsv.exe
File opened (read-only)	\??\h:	tafhsv.exe
File opened (read-only)	\??\i:	tafhsv.exe
File opened (read-only)	\??\o:	tafhsv.exe
File opened (read-only)	\??\x:	tafhsv.exe
File opened (read-only)	\??\y:	tafhsv.exe
File opened (read-only)	\??\k:	tafhsv.exe
File opened (read-only)	\??\m:	tafhsv.exe
File opened (read-only)	\??\n:	tafhsv.exe
File opened (read-only)	\??\t:	tafhsv.exe
File opened (read-only)	\??\z:	tafhsv.exe
File opened (read-only)	\??\a:	tafhsv.exe
File opened (read-only)	\??\j:	tafhsv.exe
File opened (read-only)	\??\p:	tafhsv.exe
File opened (read-only)	\??\r:	tafhsv.exe
File opened (read-only)	\??\u:	tafhsv.exe
File opened (read-only)	\??\v:	tafhsv.exe
File opened (read-only)	\??\w:	tafhsv.exe
File opened (read-only)	\??\b:	tafhsv.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	tafhsv.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/476-0-0x0000000000400000-0x0000000000499000-memory.dmp	upx
behavioral2/memory/476-2-0x0000000000400000-0x0000000000499000-memory.dmp	upx
behavioral2/files/0x00160000000115ad-3.dat	upx
behavioral2/memory/6084-7-0x0000000000400000-0x0000000000499000-memory.dmp	upx

Drops file in Program Files directory 3 IoCs

description	ioc	Process
File created	\??\c:\Program Files\utqty\tafhsv.exe	jfrhbpz.exe
File opened for modification	\??\c:\Program Files\utqty	jfrhbpz.exe
File created	\??\c:\Program Files\utqty\tafhsv.dll	jfrhbpz.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
2812	cmd.exe

Reads the TCP/IP host and domain name from the registry 1 TTPs 1 IoCs

The configured hostname and DNS domain identify the machine and are commonly collected to profile a host before it reports in.

discovery

System Network Configuration Discovery

T1016

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Hostname	tafhsv.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	2026-11-03_ff1806110349801165b26b7dcfe13a7e_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	jfrhbpz.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	tafhsv.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
2812	cmd.exe
4016	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	tafhsv.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	tafhsv.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
4016	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
4924	tafhsv.exe
4924	tafhsv.exe
4924	tafhsv.exe
4924	tafhsv.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4924	tafhsv.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
476	2026-11-03_ff1806110349801165b26b7dcfe13a7e_elex_wannacry.exe
6084	jfrhbpz.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 476 wrote to memory of 2812	476	2026-11-03_ff1806110349801165b26b7dcfe13a7e_elex_wannacry.exe	88
PID 2812 wrote to memory of 4016	2812	cmd.exe	90
PID 2812 wrote to memory of 6084	2812	cmd.exe	91
PID 6084 wrote to memory of 4924	6084	jfrhbpz.exe	92

C:\Users\Admin\AppData\Local\Temp\2026-11-03_ff1806110349801165b26b7dcfe13a7e_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-11-03_ff1806110349801165b26b7dcfe13a7e_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:476
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\jfrhbpz.exe "C:\Users\Admin\AppData\Local\Temp\2026-11-03_ff1806110349801165b26b7dcfe13a7e_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:2812
- - 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:4016
- - C:\Users\Admin\AppData\Local\Temp\jfrhbpz.exe
    C:\Users\Admin\AppData\Local\Temp\\jfrhbpz.exe "C:\Users\Admin\AppData\Local\Temp\2026-11-03_ff1806110349801165b26b7dcfe13a7e_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:6084
  - - \??\c:\Program Files\utqty\tafhsv.exe
      "c:\Program Files\utqty\tafhsv.exe" "c:\Program Files\utqty\tafhsv.dll",DoPrivacy C:\Users\Admin\AppData\Local\Temp\jfrhbpz.exe
      4⤵
      Executes dropped EXE
      Loads dropped DLL
      Adds Run key to start application
      Enumerates connected drives
      Writes to the Master Boot Record (MBR)
      Reads the TCP/IP host and domain name from the registry
      System Location Discovery: System Language Discovery
      Checks processor information in registry
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:4924

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

Indicator Removal

T1070

File Deletion

T1070.004

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

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Downloads

tafhsv.exe

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

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jfrhbpz.exe

Path C:\Users\Admin\AppData\Local\Temp\jfrhbpz.exe
Size 403KB
SHA256 eb837aae84df4edb853dec5edf999447a1d247c2a9f94a672f238c4f0ab0a203
MD5 de28ce49d0287a850dac585bc91f6963
SHA1 708141e5ed2e3d4516ce1634dd101c38e3366af7
SHA512 1a5a239a989304d9f1d42b2eafeee6ea4306d48b597b0bf48a7421063e80a4ca0933ae2228d5c7d27224ce4faee2bc1cd31a049fbf548a47f35de4234cf44fa8
SSDEEP 6144:JtecHBTSpjVfs3mCL17O/cvARZZWcStoWwABr8iXpXxr2kDQH/9j:nHBTwjBqbYkvqZMcV7i32ieF
TLSH
T1DB94CF2332C1C8A7C1D17373FEE2B672E3F5C2A85D356A7753EA015D1E2B44C92162A9
MD5 SHA1 SHA512 SSDEEP TLSH

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tafhsv.dll

Path \??\c:\Program Files\utqty\tafhsv.dll
Size 219KB
SHA256 1c332bd01d66e4618d53921829b86af5c0196e7aeedfe51dd40987f7efb9c73d
MD5 f10337a8a45d680bab7339dcff0dca3b
SHA1 4fa2e5c01ce084f26fdcb208494f18224c33c873
SHA512 16e1a54575ca94d1f7667828590f8262238c2dcec7ee7ad56e9e1ae8b0a29d724de42ea8df2348b6a52ed08f5b627524183e3a51007b07f7e3a65954a1ca81de
SSDEEP 6144:XxDink0qeQKc/A8MNfnX2p2KL5aI3iMKt:XAk9uNfnX2p2Q5aIxK
TLSH
T1FE2413C4FF52EECEE8610AF03B4FA269DF705C6BC48202C114EE58535A65EA3F695B05
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/476-2-0x0000000000400000-0x0000000000499000-memory.dmp

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memory/476-0-0x0000000000400000-0x0000000000499000-memory.dmp

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memory/4924-15-0x0000000001180000-0x0000000001181000-memory.dmp

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memory/4924-14-0x0000000010000000-0x000000001005A000-memory.dmp

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memory/4924-12-0x0000000010000000-0x000000001005A000-memory.dmp

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memory/4924-10-0x0000000010000000-0x000000001005A000-memory.dmp

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memory/4924-16-0x0000000010000000-0x000000001005A000-memory.dmp

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memory/4924-18-0x0000000010000000-0x000000001005A000-memory.dmp

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memory/4924-21-0x0000000010000000-0x000000001005A000-memory.dmp

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memory/6084-7-0x0000000000400000-0x0000000000499000-memory.dmp

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