farfli | 738e2a0a7e6e8af60bb4ab5c6167cad9ed2fd75ac2beb622492f12a794514d96

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
29/10/2026, 16:14

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General

Target
2026-10-29_230ee09552d85bc80b364e4a74a75373_elex_wannacry.exe
Size 96KB
Sample261029-tpzy2a1tf1
SHA256 738e2a0a7e6e8af60bb4ab5c6167cad9ed2fd75ac2beb622492f12a794514d96
MD5 230ee09552d85bc80b364e4a74a75373
SHA1 b7f667fcece4f2a61a611e1b375a71929db62c2e
SHA512 9d376981e4cc033af124fd74d6382e71e701d7a3505c04829c0f0595dd204b0ff646ba1c570de616e35da01f7780da9b09057b435cbecf005aa308213e567a0a
SSDEEP 3072:xK4RNx6nb4RoIw/XBSeral6oaE0HGnvXuEOrc0pV:xl6XYeel6GGGVOr
TLSH
T168A3BF47ABA54DE5E1215CF002AB7B35937694892B25A797C384DE0DA03DEC0DF362CE
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/4268-10-0x0000000010000000-0x0000000010024000-memory.dmp	family_farfli
behavioral2/memory/4268-12-0x0000000010000000-0x0000000010024000-memory.dmp	family_farfli
behavioral2/memory/4268-13-0x0000000010000000-0x0000000010024000-memory.dmp	family_farfli
behavioral2/memory/4268-14-0x0000000010000000-0x0000000010024000-memory.dmp	family_farfli
behavioral2/memory/4268-15-0x0000000010000000-0x0000000010024000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 5 IoCs

resource	yara_rule
behavioral2/memory/4268-10-0x0000000010000000-0x0000000010024000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/4268-12-0x0000000010000000-0x0000000010024000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/4268-13-0x0000000010000000-0x0000000010024000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/4268-14-0x0000000010000000-0x0000000010024000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/4268-15-0x0000000010000000-0x0000000010024000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

UPX dump on OEP (original entry point) 8 IoCs

resource	yara_rule
behavioral2/memory/2768-6-0x0000000000400000-0x0000000000417000-memory.dmp	UPX
behavioral2/files/0x000e00000001c4d0-7.dat	UPX
behavioral2/memory/4268-9-0x0000000010000000-0x0000000010024000-memory.dmp	UPX
behavioral2/memory/4268-10-0x0000000010000000-0x0000000010024000-memory.dmp	UPX
behavioral2/memory/4268-12-0x0000000010000000-0x0000000010024000-memory.dmp	UPX
behavioral2/memory/4268-13-0x0000000010000000-0x0000000010024000-memory.dmp	UPX
behavioral2/memory/4268-14-0x0000000010000000-0x0000000010024000-memory.dmp	UPX
behavioral2/memory/4268-15-0x0000000010000000-0x0000000010024000-memory.dmp	UPX

Badlisted process makes network request 8 IoCs

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

flow	pid	Process
7	4268	rundll32.exe
8	4268	rundll32.exe
9	4268	rundll32.exe
10	4268	rundll32.exe
12	4268	rundll32.exe
13	4268	rundll32.exe
15	4268	rundll32.exe
16	4268	rundll32.exe

ACProtect 1.3x - 1.4x DLL software 1 IoCs

Detects file using ACProtect software.

resource	yara_rule
behavioral2/files/0x000e00000001c4d0-7.dat	acprotect

Deletes itself 1 TTPs 1 IoCs

defense_evasion

File Deletion

T1070.004

pid	Process
2768	barzv.exe

Executes dropped EXE 1 IoCs

pid	Process
2768	barzv.exe

Loads dropped DLL 1 IoCs

pid	Process
4268	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:\\ccxyb\\hqbwkj.dll\",init"	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)	\??\u:	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)	\??\g:	rundll32.exe
File opened (read-only)	\??\i:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\r:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\n:	rundll32.exe
File opened (read-only)	\??\o:	rundll32.exe
File opened (read-only)	\??\x:	rundll32.exe
File opened (read-only)	\??\d:	rundll32.exe
File opened (read-only)	\??\p:	rundll32.exe
File opened (read-only)	\??\t:	rundll32.exe
File opened (read-only)	\??\v:	rundll32.exe
File opened (read-only)	\??\w:	rundll32.exe
File opened (read-only)	\??\z:	rundll32.exe
File opened (read-only)	\??\h:	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)	\??\s:	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 7 IoCs

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

upx

resource	yara_rule
behavioral2/files/0x000e00000001c4d0-7.dat	upx
behavioral2/memory/4268-9-0x0000000010000000-0x0000000010024000-memory.dmp	upx
behavioral2/memory/4268-10-0x0000000010000000-0x0000000010024000-memory.dmp	upx
behavioral2/memory/4268-12-0x0000000010000000-0x0000000010024000-memory.dmp	upx
behavioral2/memory/4268-13-0x0000000010000000-0x0000000010024000-memory.dmp	upx
behavioral2/memory/4268-14-0x0000000010000000-0x0000000010024000-memory.dmp	upx
behavioral2/memory/4268-15-0x0000000010000000-0x0000000010024000-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
4508	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\Domain	rundll32.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Hostname	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	2026-10-29_230ee09552d85bc80b364e4a74a75373_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	barzv.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
4508	cmd.exe
4300	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
4300	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
4268	rundll32.exe
4268	rundll32.exe
4268	rundll32.exe
4268	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4268	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
1208	2026-10-29_230ee09552d85bc80b364e4a74a75373_elex_wannacry.exe
2768	barzv.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1208 wrote to memory of 4508	1208	2026-10-29_230ee09552d85bc80b364e4a74a75373_elex_wannacry.exe	89
PID 4508 wrote to memory of 4300	4508	cmd.exe	91
PID 4508 wrote to memory of 2768	4508	cmd.exe	92
PID 2768 wrote to memory of 4268	2768	barzv.exe	93

C:\Users\Admin\AppData\Local\Temp\2026-10-29_230ee09552d85bc80b364e4a74a75373_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-10-29_230ee09552d85bc80b364e4a74a75373_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1208
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&c:\barzv.exe "C:\Users\Admin\AppData\Local\Temp\2026-10-29_230ee09552d85bc80b364e4a74a75373_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:4508
- - 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:4300
- - \??\c:\barzv.exe
    c:\barzv.exe "C:\Users\Admin\AppData\Local\Temp\2026-10-29_230ee09552d85bc80b364e4a74a75373_elex_wannacry.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:2768
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\ccxyb\hqbwkj.dll",init c:\barzv.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:4268

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

barzv.exe

Path \??\c:\barzv.exe
Size 96KB
SHA256 55c7da7e602fd15384771e6fe729abbaafe8933cb0aad5c729de838fd98e755d
MD5 e5df960d945a5443230d7c34cf3955ac
SHA1 96a51a2d87ca193bd609940ea30509b747d3ea2f
SHA512 548030c3de288be7893f4d0efcf6dce66a1d778c340147255b4a73b94d8f1738c2487b6483a2f562e79bc1a4488f32bf3770a9ff32499cdd3e93e659d8da30c3
SSDEEP 3072:xK4RNx6nb4RoIw/XBSeral6oaE0HGnvXuEOrc0py:xl6XYeel6GGGVOw
TLSH
T1BEA3BF47ABA54DE5E1115CF0029B7B35537698892B25A797C384DE0EA03DEC0DF362CE
MD5 SHA1 SHA512 SSDEEP TLSH

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hqbwkj.dll

Path \??\c:\ccxyb\hqbwkj.dll
Size 46KB
SHA256 b6bc7902da0250f6ca920b35b222f6a0fe62102caf05d2a1722c4d3b225a0a9e
MD5 42fe886bcb6460f7c2a46e21ecac5da6
SHA1 7d9a1c9fe17121cf61444da965f29e974a95ede2
SHA512 3d1a7dc1d9ca8a4376302ba20df584ad59b98e0d3b18b06b22d7f5a455833ce124e412fc1922a3b704dcbafa31987cda3115c9a71dd6299683502cebae33567c
SSDEEP 768:P60NIyOvlPSGxZ00FBsMT0fdB5h3vU7ExCClpoduUglNgLoR/C:P6e4lP5rvz1Vd8H/C
TLSH
T10023F15733A8577BC9E621FA3263BE142B357019CB3A83545CB9B6572C21C8D927930F
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/1208-0-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/1208-2-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/2768-6-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/4268-9-0x0000000010000000-0x0000000010024000-memory.dmp

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memory/4268-10-0x0000000010000000-0x0000000010024000-memory.dmp

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memory/4268-12-0x0000000010000000-0x0000000010024000-memory.dmp

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memory/4268-13-0x0000000010000000-0x0000000010024000-memory.dmp

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memory/4268-14-0x0000000010000000-0x0000000010024000-memory.dmp

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memory/4268-15-0x0000000010000000-0x0000000010024000-memory.dmp

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