farfli | 9d0f4de52a1938816bf96ba62be086ab084b64531e22f06b049a1a75ef6f768e

Analysis

max time kernel
150s
max time network
152s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260911-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260911-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
10/11/2026, 13:27

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General

Target
2026-11-09_89fdd1c46da390c3da0596f5cd22caaa_elex_wannacry.exe
Size 267KB
Sample261110-qp6vsstybs
SHA256 9d0f4de52a1938816bf96ba62be086ab084b64531e22f06b049a1a75ef6f768e
MD5 89fdd1c46da390c3da0596f5cd22caaa
SHA1 45f70ec7fa9940100ba5d105df1e3b9d42ed1351
SHA512 310f1d0397686ed55bf0d6bb8f3110163fbfa14dea729b77366431878e236826da354aa494c029a164d265e35abbb095d6db1ffafef5136d0fa0c594f7a1e5a5
SSDEEP 6144:H8AbwMmJOyOK5ZV7NHPR519jtr5a8MueZG7Ht:PwVJOp8FNprdrMul7N
TLSH
T13A44DF11F621C945E4724C3176AE59298724FC19EB0CB687E3F46F0FDC2EE92A93C256
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 3 IoCs

resource	yara_rule
behavioral2/memory/5844-10-0x0000000010000000-0x000000001003D000-memory.dmp	family_farfli
behavioral2/memory/5844-12-0x0000000010000000-0x000000001003D000-memory.dmp	family_farfli
behavioral2/memory/5844-15-0x0000000010000000-0x000000001003D000-memory.dmp	family_farfli

Custom signature

Detects executables containing base64 encoded User Agent 3 IoCs

resource	yara_rule
behavioral2/memory/5844-10-0x0000000010000000-0x000000001003D000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/5844-12-0x0000000010000000-0x000000001003D000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/5844-15-0x0000000010000000-0x000000001003D000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

Custom signature

UPX dump on OEP (original entry point) 6 IoCs

resource	yara_rule
behavioral2/memory/4424-6-0x0000000000400000-0x000000000043A000-memory.dmp	UPX
behavioral2/files/0x0007000000016b3a-7.dat	UPX
behavioral2/memory/5844-9-0x0000000010000000-0x000000001003D000-memory.dmp	UPX
behavioral2/memory/5844-10-0x0000000010000000-0x000000001003D000-memory.dmp	UPX
behavioral2/memory/5844-12-0x0000000010000000-0x000000001003D000-memory.dmp	UPX
behavioral2/memory/5844-15-0x0000000010000000-0x000000001003D000-memory.dmp	UPX

Badlisted process makes network request 4 IoCs

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

flow	pid	Process
5	5844	rundll32.exe
7	5844	rundll32.exe
8	5844	rundll32.exe
9	5844	rundll32.exe

Deletes itself 1 TTPs 1 IoCs

defense_evasion

File Deletion

T1070.004

pid	Process
4424	qcutp.exe

Executes dropped EXE 1 IoCs

pid	Process
4424	qcutp.exe

Loads dropped DLL 1 IoCs

pid	Process
5844	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-1-5-21-4154726816-2055034831-2297277433-1000\Software\Microsoft\Windows\CurrentVersion\Run\EvtMgr = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\intea\\lbter.bel\",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)	\??\s:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\x:	rundll32.exe
File opened (read-only)	\??\y:	rundll32.exe
File opened (read-only)	\??\z:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.exe
File opened (read-only)	\??\g:	rundll32.exe
File opened (read-only)	\??\i:	rundll32.exe
File opened (read-only)	\??\k:	rundll32.exe
File opened (read-only)	\??\n:	rundll32.exe
File opened (read-only)	\??\t:	rundll32.exe
File opened (read-only)	\??\a:	rundll32.exe
File opened (read-only)	\??\l:	rundll32.exe
File opened (read-only)	\??\q:	rundll32.exe
File opened (read-only)	\??\v:	rundll32.exe
File opened (read-only)	\??\w:	rundll32.exe
File opened (read-only)	\??\d:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\p:	rundll32.exe
File opened (read-only)	\??\r:	rundll32.exe
File opened (read-only)	\??\h:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\o:	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
behavioral2/files/0x0007000000016b3a-7.dat	upx
behavioral2/memory/5844-9-0x0000000010000000-0x000000001003D000-memory.dmp	upx
behavioral2/memory/5844-10-0x0000000010000000-0x000000001003D000-memory.dmp	upx
behavioral2/memory/5844-12-0x0000000010000000-0x000000001003D000-memory.dmp	upx
behavioral2/memory/5844-15-0x0000000010000000-0x000000001003D000-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
1308	cmd.exe

Reads the TCP/IP host and domain name from the registry 1 TTPs 2 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	rundll32.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Domain	rundll32.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	2026-11-09_89fdd1c46da390c3da0596f5cd22caaa_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	qcutp.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
5008	PING.EXE
1308	cmd.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
5008	PING.EXE

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
5844	rundll32.exe
5844	rundll32.exe
5844	rundll32.exe
5844	rundll32.exe
5844	rundll32.exe
5844	rundll32.exe
5844	rundll32.exe
5844	rundll32.exe
5844	rundll32.exe
5844	rundll32.exe
5844	rundll32.exe
5844	rundll32.exe
5844	rundll32.exe
5844	rundll32.exe
5844	rundll32.exe
5844	rundll32.exe
5844	rundll32.exe
5844	rundll32.exe
5844	rundll32.exe
5844	rundll32.exe
5844	rundll32.exe
5844	rundll32.exe
5844	rundll32.exe
5844	rundll32.exe
5844	rundll32.exe
5844	rundll32.exe
5844	rundll32.exe
5844	rundll32.exe
5844	rundll32.exe
5844	rundll32.exe
5844	rundll32.exe
5844	rundll32.exe
5844	rundll32.exe
5844	rundll32.exe
5844	rundll32.exe
5844	rundll32.exe
5844	rundll32.exe
5844	rundll32.exe
5844	rundll32.exe
5844	rundll32.exe
5844	rundll32.exe
5844	rundll32.exe
5844	rundll32.exe
5844	rundll32.exe
5844	rundll32.exe
5844	rundll32.exe
5844	rundll32.exe
5844	rundll32.exe
5844	rundll32.exe
5844	rundll32.exe
5844	rundll32.exe
5844	rundll32.exe
5844	rundll32.exe
5844	rundll32.exe
5844	rundll32.exe
5844	rundll32.exe
5844	rundll32.exe
5844	rundll32.exe
5844	rundll32.exe
5844	rundll32.exe
5844	rundll32.exe
5844	rundll32.exe
5844	rundll32.exe
5844	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	5844	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
4108	2026-11-09_89fdd1c46da390c3da0596f5cd22caaa_elex_wannacry.exe
4424	qcutp.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 4108 wrote to memory of 1308	4108	2026-11-09_89fdd1c46da390c3da0596f5cd22caaa_elex_wannacry.exe	89
PID 1308 wrote to memory of 5008	1308	cmd.exe	91
PID 1308 wrote to memory of 4424	1308	cmd.exe	92
PID 4424 wrote to memory of 5844	4424	qcutp.exe	93

C:\Users\Admin\AppData\Local\Temp\2026-11-09_89fdd1c46da390c3da0596f5cd22caaa_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-11-09_89fdd1c46da390c3da0596f5cd22caaa_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4108
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\qcutp.exe "C:\Users\Admin\AppData\Local\Temp\2026-11-09_89fdd1c46da390c3da0596f5cd22caaa_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:1308
- - 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:5008
- - C:\Users\Admin\AppData\Local\Temp\qcutp.exe
    C:\Users\Admin\AppData\Local\Temp\\qcutp.exe "C:\Users\Admin\AppData\Local\Temp\2026-11-09_89fdd1c46da390c3da0596f5cd22caaa_elex_wannacry.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:4424
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\intea\lbter.bel",RAFlush C:\Users\Admin\AppData\Local\Temp\qcutp.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)
      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:5844

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

qcutp.exe

Path C:\Users\Admin\AppData\Local\Temp\qcutp.exe
Size 267KB
SHA256 bb3e3d1a01c18f783d86bffa0f296cdcc9fea0ea877ffdc36bcb3b53b142d4f3
MD5 f76eaa1e6931f6f461ec0ce2d7524d39
SHA1 5eb0c4b1db1779a00a06c4ebf7d56f2935574824
SHA512 f05d4d204abe879c5113dab6d0be8e37332bcf2614366b8e33e5795550fe9c06025548bb146d2b1cd05e4075396644225b1404a9a39e9682fedc573ce28faa2c
SSDEEP 6144:H8AbwMmJOyOK5ZV7NHPR519jtr5a8MueZG7HK:PwVJOp8FNprdrMul7q
TLSH
T13B44DF11F621C945E4724C3176AE59298724FC19EB0CB687E3F46F0FDC2EE92A93C256
MD5 SHA1 SHA512 SSDEEP TLSH

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lbter.bel

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

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memory/4108-0-0x0000000000400000-0x000000000043A000-memory.dmp

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memory/4108-2-0x0000000000400000-0x000000000043A000-memory.dmp

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memory/4424-6-0x0000000000400000-0x000000000043A000-memory.dmp

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memory/5844-9-0x0000000010000000-0x000000001003D000-memory.dmp

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memory/5844-10-0x0000000010000000-0x000000001003D000-memory.dmp

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memory/5844-12-0x0000000010000000-0x000000001003D000-memory.dmp

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memory/5844-15-0x0000000010000000-0x000000001003D000-memory.dmp

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