farfli | f4e3cf5460734cc376da0189af9d8639b11fd0b576c31e4881bbd8b899d5d4e1

Analysis

max time kernel
148s
max time network
148s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260709-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
09/08/2026, 10:23

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General

Target
2026-08-09_106aad9c37b043e756d7381ac7c1a3f5_elex_wannacry.exe
Size 113KB
Sample260809-mfajfsy1dv
SHA256 f4e3cf5460734cc376da0189af9d8639b11fd0b576c31e4881bbd8b899d5d4e1
MD5 106aad9c37b043e756d7381ac7c1a3f5
SHA1 a1d5d6f7aa4b63d2533a9a5761dc1a33003a4c37
SHA512 3328dc57ed0c74ef93a18b18a76f2c7fbb7f3f7be6dfa4d254b17b450f3221e13eb1bae30e2483c6b182cdbb090e2956da3eef45e2c8589df624158aa55bdd8f
SSDEEP 1536:agDktLw4rO10tMrlk3SJDlf98jqP+8il3CxOeZIcIWlmyyFC:ELRrO10TiJD9yjqrilyxOWPy4
TLSH
T11DB3AE5D6D62C49EE4015B7043579725A2A2AC5DFA304F334380BA4EFF36E0BEDE9198
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

backdoor bootkit discovery execution farfli persistence spyware stealer

Malware Config

Signatures

Family: Farfli
Farfli is a Windows backdoor written in C++.
backdoor farfli

Detects Farfli Backdoor 4 IoCs

resource	yara_rule
behavioral2/memory/5564-9-0x0000000010000000-0x0000000010023000-memory.dmp	family_farfli
behavioral2/memory/5564-11-0x0000000010000000-0x0000000010023000-memory.dmp	family_farfli
behavioral2/memory/5564-13-0x0000000010000000-0x0000000010023000-memory.dmp	family_farfli
behavioral2/memory/5564-14-0x0000000010000000-0x0000000010023000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 4 IoCs

resource	yara_rule
behavioral2/memory/5564-9-0x0000000010000000-0x0000000010023000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/5564-11-0x0000000010000000-0x0000000010023000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/5564-13-0x0000000010000000-0x0000000010023000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/5564-14-0x0000000010000000-0x0000000010023000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

Badlisted process makes network request 8 IoCs

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

flow	pid	Process
7	5564	rundll32.exe
8	5564	rundll32.exe
9	5564	rundll32.exe
11	5564	rundll32.exe
12	5564	rundll32.exe
14	5564	rundll32.exe
15	5564	rundll32.exe
17	5564	rundll32.exe

Deletes itself 1 IoCs

pid	Process
1332	zbgem.exe

Executes dropped EXE 1 IoCs

pid	Process
1332	zbgem.exe

Loads dropped DLL 1 IoCs

pid	Process
5564	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-1-5-21-4046655672-1449839301-2197395821-1000\Software\Microsoft\Windows\CurrentVersion\Run\EvtMgr = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\zvgkp\\bigotrmec.dll\",QueryPluginInterface"	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)	\??\j:	rundll32.exe
File opened (read-only)	\??\o:	rundll32.exe
File opened (read-only)	\??\q:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\y:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.exe
File opened (read-only)	\??\k:	rundll32.exe
File opened (read-only)	\??\n:	rundll32.exe
File opened (read-only)	\??\p:	rundll32.exe
File opened (read-only)	\??\s:	rundll32.exe
File opened (read-only)	\??\v:	rundll32.exe
File opened (read-only)	\??\w:	rundll32.exe
File opened (read-only)	\??\a:	rundll32.exe
File opened (read-only)	\??\d:	rundll32.exe
File opened (read-only)	\??\l:	rundll32.exe
File opened (read-only)	\??\r:	rundll32.exe
File opened (read-only)	\??\t:	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)	\??\m:	rundll32.exe
File opened (read-only)	\??\z:	rundll32.exe
File opened (read-only)	\??\h:	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

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
3008	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	2026-08-09_106aad9c37b043e756d7381ac7c1a3f5_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	zbgem.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
5700	PING.EXE
3008	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
5700	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
5564	rundll32.exe
5564	rundll32.exe
5564	rundll32.exe
5564	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	5564	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
5320	2026-08-09_106aad9c37b043e756d7381ac7c1a3f5_elex_wannacry.exe
1332	zbgem.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 5320 wrote to memory of 3008	5320	2026-08-09_106aad9c37b043e756d7381ac7c1a3f5_elex_wannacry.exe	89
PID 3008 wrote to memory of 5700	3008	cmd.exe	91
PID 3008 wrote to memory of 1332	3008	cmd.exe	92
PID 1332 wrote to memory of 5564	1332	zbgem.exe	93

C:\Users\Admin\AppData\Local\Temp\2026-08-09_106aad9c37b043e756d7381ac7c1a3f5_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-08-09_106aad9c37b043e756d7381ac7c1a3f5_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:5320
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\zbgem.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-09_106aad9c37b043e756d7381ac7c1a3f5_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:3008
- - 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:5700
- - C:\Users\Admin\AppData\Local\Temp\zbgem.exe
    C:\Users\Admin\AppData\Local\Temp\\zbgem.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-09_106aad9c37b043e756d7381ac7c1a3f5_elex_wannacry.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:1332
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\zvgkp\bigotrmec.dll",QueryPluginInterface C:\Users\Admin\AppData\Local\Temp\zbgem.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:5564

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

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Downloads

zbgem.exe

Path C:\Users\Admin\AppData\Local\Temp\zbgem.exe
Size 113KB
SHA256 1d67e5e7a0b8ad6b529e443f7cfc655a1671594fb0d0330b5d44c9cb9cc5e6d0
MD5 09368e31865d75344a0839a4535aa2a9
SHA1 af74bd4df1abb215c89a41e06ab654f0dd8751f7
SHA512 9df4a5980856950b1c57f4f4c0b358ef5bfcd224fa48cff1401acd55d8f0493d01595f85c9ba20a97adc3a5a0f90be3d58c46e6577d44a5cb060f6bc5a251eec
SSDEEP 1536:agDktLw4rO10tMrlk3SJDlf98jqP+8il3CxOeZIcIWlmyyFt:ELRrO10TiJD9yjqrilyxOWPyb
TLSH
T1EFB39D5D6D62C59EE4015B7043579721A2A2AC5DFA304F334380BA4EFF36E0BEDE9198
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

bigotrmec.dll

Path \??\c:\zvgkp\bigotrmec.dll
Size 44KB
SHA256 9111c1eb1f0b59dcd49cfd5a0abc0ba100ac59a3bcae8623ff091dfdc46fed3c
MD5 0f12a7d509b2c9bb9b4cd6d8a0325e86
SHA1 f5fb59ad4f0633d115b06f35a2dc161dc4367157
SHA512 e3c84a643ff0a2627daba8a056221985a472aaf07bade61b3e9459db4bfc8792c1347606911e3fcc01581508004b18b5435bcccd5e7617cc6d091f37a5f42e7f
SSDEEP 768:DICzePjle2367kjhrXLdCuYMW8QVnwrLDGe/brbtJyOTuXfADVjeJ2i/MVJWAE:DDePjA23Ukjh37YMonwrvGybrbbRCf4E
TLSH
T1FD23F1A7B94E8D4FC0AE41F7078FC8D422B5589A97A7CB4626008F216CC4FB07E52376
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/1332-6-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/5320-0-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/5320-2-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/5564-10-0x0000000000C30000-0x0000000000C32000-memory.dmp

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memory/5564-9-0x0000000010000000-0x0000000010023000-memory.dmp

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memory/5564-11-0x0000000010000000-0x0000000010023000-memory.dmp

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memory/5564-13-0x0000000010000000-0x0000000010023000-memory.dmp

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memory/5564-14-0x0000000010000000-0x0000000010023000-memory.dmp

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