farfli | a57d663be644d7e8014afa939776d855bb7e729948a24c8dfe89384cf83034c4

Analysis

max time kernel
148s
max time network
136s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260911-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260911-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
09/10/2026, 23:27

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General

Target
2026-10-09_fb413ce526ef5d94871642c1309222a1_elex_wannacry.exe
Size 400KB
Sample261009-3ff91adw7m
SHA256 a57d663be644d7e8014afa939776d855bb7e729948a24c8dfe89384cf83034c4
MD5 fb413ce526ef5d94871642c1309222a1
SHA1 5f21084945d2bf37cff77952701dc261796ab7b8
SHA512 51254c5868d73b67908ec670cad8b7a4201e0dcb5723b4200cb1e0cdc703e0edcdba7be44f4f1a4d7a63da0f612df86551c4601696a94f0f29597effaa13b86c
SSDEEP 6144:WtecHBTStjVfs3mCL17O/cvARZZWcStoWwABr8iXpXxr2kDQH6LZ:oHBTAjBqbYkvqZMcV7i32iT9
TLSH
T16C94CF2332C0C8B7D1D17373FEE6AA72E3F5C2A85D396A7753DA014D1E2744C92162A9
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/1352-13-0x0000000010000000-0x000000001005A000-memory.dmp	family_farfli
behavioral2/memory/1352-11-0x0000000010000000-0x000000001005A000-memory.dmp	family_farfli
behavioral2/memory/1352-16-0x0000000010000000-0x000000001005A000-memory.dmp	family_farfli
behavioral2/memory/1352-18-0x0000000010000000-0x000000001005A000-memory.dmp	family_farfli
behavioral2/memory/1352-21-0x0000000010000000-0x000000001005A000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 5 IoCs

resource	yara_rule
behavioral2/memory/1352-13-0x0000000010000000-0x000000001005A000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/1352-11-0x0000000010000000-0x000000001005A000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/1352-16-0x0000000010000000-0x000000001005A000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/1352-18-0x0000000010000000-0x000000001005A000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/1352-21-0x0000000010000000-0x000000001005A000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

Deletes itself 1 TTPs 1 IoCs

defense_evasion

File Deletion

T1070.004

pid	Process
868	vrbhouevn.exe

Executes dropped EXE 2 IoCs

pid	Process
868	vrbhouevn.exe
1352	fgjohdnfi.exe

Loads dropped DLL 1 IoCs

pid	Process
1352	fgjohdnfi.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-1-5-21-461973139-3212354679-1508698038-1000\Software\Microsoft\Windows\CurrentVersion\Run\DESIME = "c:\\Program Files\\kmekc\\fgjohdnfi.exe \"c:\\Program Files\\kmekc\\fgjohdnfi.dll\",DoPrivacy"	fgjohdnfi.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)	\??\i:	fgjohdnfi.exe
File opened (read-only)	\??\l:	fgjohdnfi.exe
File opened (read-only)	\??\r:	fgjohdnfi.exe
File opened (read-only)	\??\g:	fgjohdnfi.exe
File opened (read-only)	\??\h:	fgjohdnfi.exe
File opened (read-only)	\??\k:	fgjohdnfi.exe
File opened (read-only)	\??\n:	fgjohdnfi.exe
File opened (read-only)	\??\o:	fgjohdnfi.exe
File opened (read-only)	\??\s:	fgjohdnfi.exe
File opened (read-only)	\??\u:	fgjohdnfi.exe
File opened (read-only)	\??\w:	fgjohdnfi.exe
File opened (read-only)	\??\a:	fgjohdnfi.exe
File opened (read-only)	\??\b:	fgjohdnfi.exe
File opened (read-only)	\??\j:	fgjohdnfi.exe
File opened (read-only)	\??\p:	fgjohdnfi.exe
File opened (read-only)	\??\t:	fgjohdnfi.exe
File opened (read-only)	\??\v:	fgjohdnfi.exe
File opened (read-only)	\??\y:	fgjohdnfi.exe
File opened (read-only)	\??\z:	fgjohdnfi.exe
File opened (read-only)	\??\d:	fgjohdnfi.exe
File opened (read-only)	\??\m:	fgjohdnfi.exe
File opened (read-only)	\??\q:	fgjohdnfi.exe
File opened (read-only)	\??\x:	fgjohdnfi.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	fgjohdnfi.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4392-0-0x0000000000400000-0x0000000000499000-memory.dmp	upx
behavioral2/memory/4392-2-0x0000000000400000-0x0000000000499000-memory.dmp	upx
behavioral2/files/0x000c000000019cb7-3.dat	upx
behavioral2/memory/868-7-0x0000000000400000-0x0000000000499000-memory.dmp	upx

Drops file in Program Files directory 3 IoCs

description	ioc	Process
File opened for modification	\??\c:\Program Files\kmekc	vrbhouevn.exe
File created	\??\c:\Program Files\kmekc\fgjohdnfi.dll	vrbhouevn.exe
File created	\??\c:\Program Files\kmekc\fgjohdnfi.exe	vrbhouevn.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
6104	cmd.exe

Reads the TCP/IP host and domain name from the registry 1 TTPs 1 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	fgjohdnfi.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	vrbhouevn.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	fgjohdnfi.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-10-09_fb413ce526ef5d94871642c1309222a1_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
6104	cmd.exe
3444	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	fgjohdnfi.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	fgjohdnfi.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
3444	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1352	fgjohdnfi.exe
1352	fgjohdnfi.exe
1352	fgjohdnfi.exe
1352	fgjohdnfi.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1352	fgjohdnfi.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
4392	2026-10-09_fb413ce526ef5d94871642c1309222a1_elex_wannacry.exe
868	vrbhouevn.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 4392 wrote to memory of 6104	4392	2026-10-09_fb413ce526ef5d94871642c1309222a1_elex_wannacry.exe	89
PID 6104 wrote to memory of 3444	6104	cmd.exe	91
PID 6104 wrote to memory of 868	6104	cmd.exe	92
PID 868 wrote to memory of 1352	868	vrbhouevn.exe	93

C:\Users\Admin\AppData\Local\Temp\2026-10-09_fb413ce526ef5d94871642c1309222a1_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-10-09_fb413ce526ef5d94871642c1309222a1_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4392
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\vrbhouevn.exe "C:\Users\Admin\AppData\Local\Temp\2026-10-09_fb413ce526ef5d94871642c1309222a1_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:6104
- - 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:3444
- - C:\Users\Admin\AppData\Local\Temp\vrbhouevn.exe
    C:\Users\Admin\AppData\Local\Temp\\vrbhouevn.exe "C:\Users\Admin\AppData\Local\Temp\2026-10-09_fb413ce526ef5d94871642c1309222a1_elex_wannacry.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - Drops file in Program Files directory
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:868
  - - \??\c:\Program Files\kmekc\fgjohdnfi.exe
      "c:\Program Files\kmekc\fgjohdnfi.exe" "c:\Program Files\kmekc\fgjohdnfi.dll",DoPrivacy C:\Users\Admin\AppData\Local\Temp\vrbhouevn.exe
      4⤵
      Executes dropped EXE
      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:1352

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

Replay Monitor

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Downloads

fgjohdnfi.exe

Path C:\Program Files\kmekc\fgjohdnfi.exe
Size 51KB
SHA256 ce6bb7eddc83762c708d4a41709ae00371dbdc09b2a380f28fa60b1edf917473
MD5 2e068ce2770fde8d1af4cb114b98df1f
SHA1 b6f9c2775babb025b22f915c3047aa627d07c312
SHA512 998d695eb56375e63df7db16740b89deb2cf630ccbead8bcf84a921ec6f4a4f9aef2755b703f7190f332b2008ebcc949363bcf8f392d7d07246c255b5073ed35
SSDEEP 1536:6G9yoVEpHP29I3fbcJboSUge5N+CnC/maz9Rh:8pv2mbcJboce58wvOR
TLSH
T137336C236A0A49B3DFE231780A9D7232526DD862075541F7A61057EAFD243E2EE743CF
MD5 SHA1 SHA512 SSDEEP TLSH

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vrbhouevn.exe

Path C:\Users\Admin\AppData\Local\Temp\vrbhouevn.exe
Size 400KB
SHA256 a93659ac8216d3ffb2faf338945f408f45c1acff896aeb4a7ff39ae9d80ee5c3
MD5 ff8e3ef4fbee7261c70fe380a2ab8a10
SHA1 2a27ce116e27ba1b9306239ea578d73daf28e00b
SHA512 20e80dfe6d0a12063301f85ed0ee39e5fc55ac5ca5f0c2e2cfcb2672f37eab2c116fa31781e55564ce7c7e7658d69392c723d4a9d1d8f4fa30ef7251cc9eb2a1
SSDEEP 6144:WtecHBTStjVfs3mCL17O/cvARZZWcStoWwABr8iXpXxr2kDQH6L:oHBTAjBqbYkvqZMcV7i32iT
TLSH
T19B94CF2332C0C8B7D1D17373FEE6AA72E3F5C2A85D396A7753DA014D1E2744C92162A9
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

fgjohdnfi.dll

Path \??\c:\Program Files\kmekc\fgjohdnfi.dll
Size 219KB
SHA256 5a6052997bc69eea5ea06285aa05c2fa7bd3e31f1e67c62a44f0f5295bd8c3b3
MD5 74038a2120059f604abdcf9eed9f9e42
SHA1 ddc60de8c50e2723640c2b72027a82ba5af46a6f
SHA512 f1cc6b1d589d1f2e2ddc04853ca8e9191055bf6c0f6c0f2b82e957e346c34ab6950f46c67737a99bcadcaf2ee04851922c93acb5dbf39bda6fdb610c4557b0d0
SSDEEP 6144:XxDink0qeQKc/A8MNfnX2p2KL5aI3iMKD:XAk9uNfnX2p2Q5aIxu
TLSH
T1182413C4FF52EECEE8610AF03B5FA2A5DF705C6BC48202C114EE58535A65EA3F695B01
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/868-7-0x0000000000400000-0x0000000000499000-memory.dmp

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memory/1352-13-0x0000000010000000-0x000000001005A000-memory.dmp

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memory/1352-15-0x0000000000A90000-0x0000000000A91000-memory.dmp

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memory/1352-11-0x0000000010000000-0x000000001005A000-memory.dmp

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memory/1352-10-0x0000000010000000-0x000000001005A000-memory.dmp

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memory/1352-16-0x0000000010000000-0x000000001005A000-memory.dmp

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memory/1352-18-0x0000000010000000-0x000000001005A000-memory.dmp

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memory/1352-21-0x0000000010000000-0x000000001005A000-memory.dmp

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memory/4392-2-0x0000000000400000-0x0000000000499000-memory.dmp

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memory/4392-0-0x0000000000400000-0x0000000000499000-memory.dmp

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