farfli | deaf0041a5103a2e83fe79a3e751f46c6528d012765c18e9521691f4ca1e5a16

Analysis

max time kernel
149s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20260513-en
resource tags

arch:x64arch:x86image:win10v2004-20260513-enlocale:en-usos:windows10-2004-x64systemwindows
submitted
10/08/2026, 09:37

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General

Target
2026-08-10_ce44d7cb1a3cb38fe823660bdd415958_elex_wannacry.exe
Size 101KB
Sample260810-llff8aep4v
SHA256 deaf0041a5103a2e83fe79a3e751f46c6528d012765c18e9521691f4ca1e5a16
MD5 ce44d7cb1a3cb38fe823660bdd415958
SHA1 1b6f295230d3b6c597958c07606c871a71492d2e
SHA512 126dc3067f18e027283fa74292a4905ef7db4d58d22523543211e43cb979563783ac82b020b75c767d23235cc04d8fb981ef877dee8c5b0d7512fcedd00c76b5
SSDEEP 1536:8gDktLw4rO10tMrlk3SJDlf98jqP+8il3CxOeZIckWlmy:uLRrO10TiJD9yjqrilyxOuP
TLSH
T1C9A37B1C6962C5DEE4015F74434B962096A2AC19FA304F335384BB4EFF36E1BEDA91D8
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 3 IoCs

resource	yara_rule
behavioral1/memory/5064-12-0x0000000010000000-0x0000000010023000-memory.dmp	family_farfli
behavioral1/memory/5064-15-0x0000000010000000-0x0000000010023000-memory.dmp	family_farfli
behavioral1/memory/5064-16-0x0000000010000000-0x0000000010023000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 3 IoCs

resource	yara_rule
behavioral1/memory/5064-12-0x0000000010000000-0x0000000010023000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/5064-15-0x0000000010000000-0x0000000010023000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/5064-16-0x0000000010000000-0x0000000010023000-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
12	5064	rundll32.exe
13	5064	rundll32.exe
14	5064	rundll32.exe
21	5064	rundll32.exe
31	5064	rundll32.exe
41	5064	rundll32.exe
51	5064	rundll32.exe
54	5064	rundll32.exe

Deletes itself 1 IoCs

pid	Process
3340	wbbbr.exe

Executes dropped EXE 1 IoCs

pid	Process
3340	wbbbr.exe

Loads dropped DLL 1 IoCs

pid	Process
5064	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-1-5-21-2937465464-4167303362-2236413517-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\EvtMgr = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\xmfqs\\oijrwrinv.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)	\??\z:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.exe
File opened (read-only)	\??\e:	rundll32.exe
File opened (read-only)	\??\n:	rundll32.exe
File opened (read-only)	\??\q:	rundll32.exe
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)	\??\h:	rundll32.exe
File opened (read-only)	\??\l:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\k:	rundll32.exe
File opened (read-only)	\??\o:	rundll32.exe
File opened (read-only)	\??\r:	rundll32.exe
File opened (read-only)	\??\v:	rundll32.exe
File opened (read-only)	\??\y:	rundll32.exe
File opened (read-only)	\??\a:	rundll32.exe
File opened (read-only)	\??\g:	rundll32.exe
File opened (read-only)	\??\i:	rundll32.exe
File opened (read-only)	\??\p:	rundll32.exe
File opened (read-only)	\??\t:	rundll32.exe
File opened (read-only)	\??\w:	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
1500	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	PING.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	wbbbr.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-08-10_ce44d7cb1a3cb38fe823660bdd415958_elex_wannacry.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.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
1500	cmd.exe
5096	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
5096	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
5064	rundll32.exe
5064	rundll32.exe
5064	rundll32.exe
5064	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	5064	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2420	2026-08-10_ce44d7cb1a3cb38fe823660bdd415958_elex_wannacry.exe
3340	wbbbr.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2420 wrote to memory of 1500	2420	2026-08-10_ce44d7cb1a3cb38fe823660bdd415958_elex_wannacry.exe	85
PID 1500 wrote to memory of 5096	1500	cmd.exe	87
PID 1500 wrote to memory of 3340	1500	cmd.exe	89
PID 3340 wrote to memory of 5064	3340	wbbbr.exe	90

C:\Users\Admin\AppData\Local\Temp\2026-08-10_ce44d7cb1a3cb38fe823660bdd415958_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-08-10_ce44d7cb1a3cb38fe823660bdd415958_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2420
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\wbbbr.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-10_ce44d7cb1a3cb38fe823660bdd415958_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:1500
- - 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:5096
- - C:\Users\Admin\AppData\Local\Temp\wbbbr.exe
    C:\Users\Admin\AppData\Local\Temp\\wbbbr.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-10_ce44d7cb1a3cb38fe823660bdd415958_elex_wannacry.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:3340
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\xmfqs\oijrwrinv.dll",QueryPluginInterface C:\Users\Admin\AppData\Local\Temp\wbbbr.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:5064

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

wbbbr.exe

Path C:\Users\Admin\AppData\Local\Temp\wbbbr.exe
Size 101KB
SHA256 e8adf98fdc9d6c411b574587ec74ee56decee110f8723f42201e565d9111ca2d
MD5 866ad4bb7b3190f4d839d739efe2fbe5
SHA1 93a224d19728be03d9559487bf5df8a127a3174e
SHA512 9219e071016bdd52fb646b045fd216d5b3d41334f5b183e276443a2af5f7debda347ca08da431f63762be34d6a84ccba63f58ff5469ea476707ab2f3dda35f21
SSDEEP 1536:8gDktLw4rO10tMrlk3SJDlf98jqP+8il3CxOeZIckWlmyP:uLRrO10TiJD9yjqrilyxOuPP
TLSH
T17BA37B1C6962C5DEE4015F74434B962096A2AC19FA304F335384BB4EFF36E1BEDA91D8
MD5 SHA1 SHA512 SSDEEP TLSH

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oijrwrinv.dll

Path \??\c:\xmfqs\oijrwrinv.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/2420-0-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/2420-2-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/3340-7-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/5064-10-0x0000000010000000-0x0000000010023000-memory.dmp

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memory/5064-11-0x0000000002A90000-0x0000000002A92000-memory.dmp

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memory/5064-12-0x0000000010000000-0x0000000010023000-memory.dmp

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memory/5064-13-0x0000000002A90000-0x0000000002A92000-memory.dmp

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memory/5064-15-0x0000000010000000-0x0000000010023000-memory.dmp

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memory/5064-16-0x0000000010000000-0x0000000010023000-memory.dmp

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