farfli | a73b4b7b45678085c7af2369f202be9db33f9c3e6d0c0eda30908863cea2d720

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
02/08/2026, 07:56

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General

Target
2026-08-02_d455c11c70204a4b67f875ecb59f74b8_elex_wannacry.exe
Size 94KB
Sample260802-jsrfyser8s
SHA256 a73b4b7b45678085c7af2369f202be9db33f9c3e6d0c0eda30908863cea2d720
MD5 d455c11c70204a4b67f875ecb59f74b8
SHA1 796c346ddb26f79d4b58fe95efcdea9e812713d6
SHA512 93d994db83080f48cd425e0381dd5709a95ffa41c2e7704ceb3b52b584c9f50f23e431a0783ccbd90944866c90a0ed67601604eed76e733cb23df7aaeee9b8a3
SSDEEP 1536:8gDktLw4rO10tMrlk3SJDlf98jqP+8il3CxOeZIckWlmyd:uLRrO10TiJD9yjqrilyxOuPd
TLSH
T1DB938C1C6962C59EE4054F74434B9620A7A2AC19FA304F335384BA4EFF36D1BEDE91D8
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/4184-12-0x0000000010000000-0x0000000010023000-memory.dmp	family_farfli
behavioral1/memory/4184-15-0x0000000010000000-0x0000000010023000-memory.dmp	family_farfli
behavioral1/memory/4184-16-0x0000000010000000-0x0000000010023000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 3 IoCs

resource	yara_rule
behavioral1/memory/4184-12-0x0000000010000000-0x0000000010023000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/4184-15-0x0000000010000000-0x0000000010023000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/4184-16-0x0000000010000000-0x0000000010023000-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	4184	rundll32.exe
13	4184	rundll32.exe
14	4184	rundll32.exe
19	4184	rundll32.exe
25	4184	rundll32.exe
40	4184	rundll32.exe
45	4184	rundll32.exe
50	4184	rundll32.exe

Deletes itself 1 IoCs

pid	Process
4704	ojcvraizm.exe

Executes dropped EXE 1 IoCs

pid	Process
4704	ojcvraizm.exe

Loads dropped DLL 1 IoCs

pid	Process
4184	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-1-5-21-204488895-2999877624-296153668-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\EvtMgr = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\fjxku\\kobnc.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)	\??\i:	rundll32.exe
File opened (read-only)	\??\k:	rundll32.exe
File opened (read-only)	\??\l:	rundll32.exe
File opened (read-only)	\??\p:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\v:	rundll32.exe
File opened (read-only)	\??\a:	rundll32.exe
File opened (read-only)	\??\h:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\o:	rundll32.exe
File opened (read-only)	\??\w:	rundll32.exe
File opened (read-only)	\??\x:	rundll32.exe
File opened (read-only)	\??\y:	rundll32.exe
File opened (read-only)	\??\n:	rundll32.exe
File opened (read-only)	\??\s:	rundll32.exe
File opened (read-only)	\??\t:	rundll32.exe
File opened (read-only)	\??\g:	rundll32.exe
File opened (read-only)	\??\q:	rundll32.exe
File opened (read-only)	\??\r:	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
2620	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	ojcvraizm.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-08-02_d455c11c70204a4b67f875ecb59f74b8_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
2564	PING.EXE
2620	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
2564	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
4184	rundll32.exe
4184	rundll32.exe
4184	rundll32.exe
4184	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4184	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2076	2026-08-02_d455c11c70204a4b67f875ecb59f74b8_elex_wannacry.exe
4704	ojcvraizm.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2076 wrote to memory of 2620	2076	2026-08-02_d455c11c70204a4b67f875ecb59f74b8_elex_wannacry.exe	86
PID 2620 wrote to memory of 2564	2620	cmd.exe	88
PID 2620 wrote to memory of 4704	2620	cmd.exe	89
PID 4704 wrote to memory of 4184	4704	ojcvraizm.exe	90

C:\Users\Admin\AppData\Local\Temp\2026-08-02_d455c11c70204a4b67f875ecb59f74b8_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-08-02_d455c11c70204a4b67f875ecb59f74b8_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2076
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\ojcvraizm.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-02_d455c11c70204a4b67f875ecb59f74b8_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:2620
- - 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:2564
- - C:\Users\Admin\AppData\Local\Temp\ojcvraizm.exe
    C:\Users\Admin\AppData\Local\Temp\\ojcvraizm.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-02_d455c11c70204a4b67f875ecb59f74b8_elex_wannacry.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:4704
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\fjxku\kobnc.dll",QueryPluginInterface C:\Users\Admin\AppData\Local\Temp\ojcvraizm.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:4184

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

ojcvraizm.exe

Path C:\Users\Admin\AppData\Local\Temp\ojcvraizm.exe
Size 95KB
SHA256 835a4c2af9d06117a3be874b80e4ef44cfdb2959b5a94666bc9a7c60e9c1d23f
MD5 b5378abfcb50d1a43ba44d1cbe236dec
SHA1 170d6e3811ae25911c30d512c9152ecef242dfdf
SHA512 5335e665fb4668d3b887989f4ce0ffb0df2f1773abe2dd6e8a05c79945d5d3ba863bfc4c4227305d267eed366c04e15d917aef033a33c54d1533875bf03ddb2b
SSDEEP 1536:8gDktLw4rO10tMrlk3SJDlf98jqP+8il3CxOeZIckWlmyv:uLRrO10TiJD9yjqrilyxOuPv
TLSH
T1AC938C1C6962C59EE4054F74434B962097A2AC19FA304F335384BA4EFF36E1BEDE91D8
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

kobnc.dll

Path \??\c:\fjxku\kobnc.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/2076-0-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/2076-2-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/4184-10-0x0000000010000000-0x0000000010023000-memory.dmp

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memory/4184-11-0x0000000000740000-0x0000000000742000-memory.dmp

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memory/4184-12-0x0000000010000000-0x0000000010023000-memory.dmp

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memory/4184-13-0x0000000000740000-0x0000000000742000-memory.dmp

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memory/4184-15-0x0000000010000000-0x0000000010023000-memory.dmp

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memory/4184-16-0x0000000010000000-0x0000000010023000-memory.dmp

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memory/4704-7-0x0000000000400000-0x0000000000417000-memory.dmp

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