farfli | 96e686d73d6c6ad69546c7e5fcb84580263475ad54ead6aac9cd35d70c681718

Analysis

max time kernel
148s
max time network
138s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260911-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260911-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
11/10/2026, 14:35

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General

Target
2026-10-10_4e115834615421b9ea42e270a442d781_elex_wannacry.exe
Size 400KB
Sample261011-rx4k3sbc74
SHA256 96e686d73d6c6ad69546c7e5fcb84580263475ad54ead6aac9cd35d70c681718
MD5 4e115834615421b9ea42e270a442d781
SHA1 7642b0ee31850d850ad398e3ccee512b68e1112a
SHA512 e130f104d413c5a392c2b492ed1ff93c619650ab745e1d289c7fc5c88105a32df785ede37c859f49bd12ae644a2a7bf4460788df9d9177439700e9fd133e36f7
SSDEEP 6144:JtecHBTSpjVfs3mCL17O/cvARZZWcStoWwABr8iXpXxr2kDQH/9:nHBTwjBqbYkvqZMcV7i32ie
TLSH
T1B394CF2332C1C8B7C1D17373FEE2AA72E3F5C2A85D356A7753EA015D1E2744C92162A9
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 5 IoCs

resource	yara_rule
behavioral2/memory/1528-13-0x0000000010000000-0x000000001005A000-memory.dmp	family_farfli
behavioral2/memory/1528-11-0x0000000010000000-0x000000001005A000-memory.dmp	family_farfli
behavioral2/memory/1528-16-0x0000000010000000-0x000000001005A000-memory.dmp	family_farfli
behavioral2/memory/1528-18-0x0000000010000000-0x000000001005A000-memory.dmp	family_farfli
behavioral2/memory/1528-21-0x0000000010000000-0x000000001005A000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 5 IoCs

resource	yara_rule
behavioral2/memory/1528-13-0x0000000010000000-0x000000001005A000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/1528-11-0x0000000010000000-0x000000001005A000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/1528-16-0x0000000010000000-0x000000001005A000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/1528-18-0x0000000010000000-0x000000001005A000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/1528-21-0x0000000010000000-0x000000001005A000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

Deletes itself 1 TTPs 1 IoCs

defense_evasion

File Deletion

T1070.004

pid	Process
4172	giqrmuk.exe

Executes dropped EXE 2 IoCs

pid	Process
4172	giqrmuk.exe
1528	stxspt.exe

Loads dropped DLL 1 IoCs

pid	Process
1528	stxspt.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-1-5-21-1704430598-3087477806-3297458608-1000\Software\Microsoft\Windows\CurrentVersion\Run\DESIME = "c:\\Program Files\\wkotxtt\\stxspt.exe \"c:\\Program Files\\wkotxtt\\stxspt.dll\",DoPrivacy"	stxspt.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)	\??\b:	stxspt.exe
File opened (read-only)	\??\d:	stxspt.exe
File opened (read-only)	\??\i:	stxspt.exe
File opened (read-only)	\??\j:	stxspt.exe
File opened (read-only)	\??\p:	stxspt.exe
File opened (read-only)	\??\q:	stxspt.exe
File opened (read-only)	\??\x:	stxspt.exe
File opened (read-only)	\??\h:	stxspt.exe
File opened (read-only)	\??\l:	stxspt.exe
File opened (read-only)	\??\m:	stxspt.exe
File opened (read-only)	\??\n:	stxspt.exe
File opened (read-only)	\??\o:	stxspt.exe
File opened (read-only)	\??\g:	stxspt.exe
File opened (read-only)	\??\s:	stxspt.exe
File opened (read-only)	\??\v:	stxspt.exe
File opened (read-only)	\??\y:	stxspt.exe
File opened (read-only)	\??\k:	stxspt.exe
File opened (read-only)	\??\r:	stxspt.exe
File opened (read-only)	\??\t:	stxspt.exe
File opened (read-only)	\??\u:	stxspt.exe
File opened (read-only)	\??\w:	stxspt.exe
File opened (read-only)	\??\z:	stxspt.exe
File opened (read-only)	\??\a:	stxspt.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	stxspt.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/5468-0-0x0000000000400000-0x0000000000499000-memory.dmp	upx
behavioral2/memory/5468-2-0x0000000000400000-0x0000000000499000-memory.dmp	upx
behavioral2/files/0x0024000000018899-3.dat	upx
behavioral2/memory/4172-7-0x0000000000400000-0x0000000000499000-memory.dmp	upx

Drops file in Program Files directory 3 IoCs

description	ioc	Process
File created	\??\c:\Program Files\wkotxtt\stxspt.dll	giqrmuk.exe
File created	\??\c:\Program Files\wkotxtt\stxspt.exe	giqrmuk.exe
File opened for modification	\??\c:\Program Files\wkotxtt	giqrmuk.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
4108	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	stxspt.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	2026-10-10_4e115834615421b9ea42e270a442d781_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	giqrmuk.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	stxspt.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
4108	cmd.exe
3516	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	stxspt.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	stxspt.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
3516	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1528	stxspt.exe
1528	stxspt.exe
1528	stxspt.exe
1528	stxspt.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1528	stxspt.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
5468	2026-10-10_4e115834615421b9ea42e270a442d781_elex_wannacry.exe
4172	giqrmuk.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 5468 wrote to memory of 4108	5468	2026-10-10_4e115834615421b9ea42e270a442d781_elex_wannacry.exe	89
PID 4108 wrote to memory of 3516	4108	cmd.exe	91
PID 4108 wrote to memory of 4172	4108	cmd.exe	92
PID 4172 wrote to memory of 1528	4172	giqrmuk.exe	93

C:\Users\Admin\AppData\Local\Temp\2026-10-10_4e115834615421b9ea42e270a442d781_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-10-10_4e115834615421b9ea42e270a442d781_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:5468
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\giqrmuk.exe "C:\Users\Admin\AppData\Local\Temp\2026-10-10_4e115834615421b9ea42e270a442d781_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:4108
- - 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:3516
- - C:\Users\Admin\AppData\Local\Temp\giqrmuk.exe
    C:\Users\Admin\AppData\Local\Temp\\giqrmuk.exe "C:\Users\Admin\AppData\Local\Temp\2026-10-10_4e115834615421b9ea42e270a442d781_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:4172
  - - \??\c:\Program Files\wkotxtt\stxspt.exe
      "c:\Program Files\wkotxtt\stxspt.exe" "c:\Program Files\wkotxtt\stxspt.dll",DoPrivacy C:\Users\Admin\AppData\Local\Temp\giqrmuk.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:1528

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

stxspt.exe

Path C:\Program Files\wkotxtt\stxspt.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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giqrmuk.exe

Path C:\Users\Admin\AppData\Local\Temp\giqrmuk.exe
Size 400KB
SHA256 03dbfad57b442c8aa1029f7631b0ff6657ff9e3af8b82fad2a683d45e82dcfea
MD5 5c918ec76e11af9250d15525d9637405
SHA1 aee1ba53a25de0cd309fcaa0585ab44db60cbc78
SHA512 123711e678d5c2e94cead240b9b8d470db0a28acfd091284aa056c9e06d04aa4b02907d6fc8de455e03f568ffee1c68261b5be12a90e6253fdabd6bbc6eceae2
SSDEEP 6144:JtecHBTSpjVfs3mCL17O/cvARZZWcStoWwABr8iXpXxr2kDQH/9:nHBTwjBqbYkvqZMcV7i32ie
TLSH
T12594CF2332C1C8B7C1D17373FEE2AA72E3F5C2A85D356A7753EA015D1E2744C92162A9
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

stxspt.dll

Path \??\c:\Program Files\wkotxtt\stxspt.dll
Size 219KB
SHA256 d1dc00e26d4aa3e64536b221e22a3a644c79a5630b132d528e8a956082f6501f
MD5 f4b11381d13474229ed8458c92ead495
SHA1 c7c7d0e30bd4eefca0c3cdc77154ea11d331fe0d
SHA512 b2422e4516be37b6594152cfb305a6b4f2b3759db1de1838ce832427fe089482ce5b04ea30b571cd20a0a22594ee071144c654660ed3f4a42222ab229daae163
SSDEEP 6144:XxDink0qeQKc/A8MNfnX2p2KL5aI3iMKw:XAk9uNfnX2p2Q5aIxv
TLSH
T1252413C4FF52EFCEE8610AF03B4FA265DF70586BC48202C114EE58535A65EA3F655B05
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/1528-11-0x0000000010000000-0x000000001005A000-memory.dmp

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memory/1528-10-0x0000000010000000-0x000000001005A000-memory.dmp

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memory/1528-13-0x0000000010000000-0x000000001005A000-memory.dmp

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memory/1528-15-0x0000000002AA0000-0x0000000002AA1000-memory.dmp

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memory/1528-16-0x0000000010000000-0x000000001005A000-memory.dmp

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memory/1528-18-0x0000000010000000-0x000000001005A000-memory.dmp

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memory/1528-21-0x0000000010000000-0x000000001005A000-memory.dmp

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memory/4172-7-0x0000000000400000-0x0000000000499000-memory.dmp

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memory/5468-2-0x0000000000400000-0x0000000000499000-memory.dmp

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memory/5468-0-0x0000000000400000-0x0000000000499000-memory.dmp

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