farfli | f00928a5b2a638c3389090bdc92f350dd3992ea574e674f575d2820304ea5863

General

Target
2026-08-12_15d1269a0eb469df39c31a86ac19951e_elex_wannacry.exe
Size 109KB
Sample260812-eck7savvcy
SHA256 f00928a5b2a638c3389090bdc92f350dd3992ea574e674f575d2820304ea5863
MD5 15d1269a0eb469df39c31a86ac19951e
SHA1 361d73dd06fcd5bb5f368ed17a109c94581a6463
SHA512 c0392ee0dce821d7877c1bf466a2021d0c9f24d4ed915492c85c6462f25efc553356190718aaa5f06d4b444415580bcf241782203d80aef52eadf8d543f0f7b0
SSDEEP 1536:vRiAXaKD5gxzmwYEM/D3ozc4I8JboecWtX41:piAXaKDeKNnD36cb8tI1
TLSH
T101B39D02ABF0C7A5E0665CB506775B619EB2FC6A2924832777D6B70EEC30F00EE25355
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 1 IoCs

resource	yara_rule
behavioral2/memory/2748-10-0x0000000010000000-0x000000001002E000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 1 IoCs

resource	yara_rule
behavioral2/memory/2748-10-0x0000000010000000-0x000000001002E000-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	2748	rundll32.exe
8	2748	rundll32.exe
9	2748	rundll32.exe
11	2748	rundll32.exe
12	2748	rundll32.exe
14	2748	rundll32.exe
16	2748	rundll32.exe
17	2748	rundll32.exe

Deletes itself 1 IoCs

pid	Process
4276	klbxiz.exe

Executes dropped EXE 1 IoCs

pid	Process
4276	klbxiz.exe

Loads dropped DLL 1 IoCs

pid	Process
2748	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:\\swxkwma\\nzehj.dll\",GetWindowClass"	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)	\??\q:	rundll32.exe
File opened (read-only)	\??\h:	rundll32.exe
File opened (read-only)	\??\o:	rundll32.exe
File opened (read-only)	\??\p:	rundll32.exe
File opened (read-only)	\??\s:	rundll32.exe
File opened (read-only)	\??\w:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.exe
File opened (read-only)	\??\y:	rundll32.exe
File opened (read-only)	\??\a:	rundll32.exe
File opened (read-only)	\??\d:	rundll32.exe
File opened (read-only)	\??\g:	rundll32.exe
File opened (read-only)	\??\k:	rundll32.exe
File opened (read-only)	\??\l:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\v:	rundll32.exe
File opened (read-only)	\??\z:	rundll32.exe
File opened (read-only)	\??\i:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\n:	rundll32.exe
File opened (read-only)	\??\r:	rundll32.exe
File opened (read-only)	\??\t:	rundll32.exe
File opened (read-only)	\??\x:	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
1112	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	2026-08-12_15d1269a0eb469df39c31a86ac19951e_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	klbxiz.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
1112	cmd.exe
1692	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
1692	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2748	rundll32.exe
2748	rundll32.exe
2748	rundll32.exe
2748	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2748	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2820	2026-08-12_15d1269a0eb469df39c31a86ac19951e_elex_wannacry.exe
4276	klbxiz.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2820 wrote to memory of 1112	2820	2026-08-12_15d1269a0eb469df39c31a86ac19951e_elex_wannacry.exe	89
PID 1112 wrote to memory of 1692	1112	cmd.exe	91
PID 1112 wrote to memory of 4276	1112	cmd.exe	92
PID 4276 wrote to memory of 2748	4276	klbxiz.exe	93

C:\Users\Admin\AppData\Local\Temp\2026-08-12_15d1269a0eb469df39c31a86ac19951e_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-08-12_15d1269a0eb469df39c31a86ac19951e_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2820
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&c:\klbxiz.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-12_15d1269a0eb469df39c31a86ac19951e_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:1112
- - 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:1692
- - \??\c:\klbxiz.exe
    c:\klbxiz.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-12_15d1269a0eb469df39c31a86ac19951e_elex_wannacry.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:4276
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\swxkwma\nzehj.dll",GetWindowClass c:\klbxiz.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:2748

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

Windows Command Shell

1

T1059.003

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Pre-OS Boot

1

T1542

Bootkit

1

T1542.003

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

Pre-OS Boot

1

T1542

Bootkit

1

T1542.003

Credential Access

Credentials from Password Stores

1

T1555

Credentials from Web Browsers

1

T1555.003

Unsecured Credentials

1

T1552

Credentials In Files

1

T1552.001

Discovery

Peripheral Device Discovery

Query Registry

Remote System Discovery

1

T1018

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

System Network Configuration Discovery

1

T1016

Internet Connection Discovery

1

T1016.001

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

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Downloads

klbxiz.exe

Path \??\c:\klbxiz.exe
Size 110KB
SHA256 329d00cf8bb59e78e15e21fceb041731865051702cd796ce56912540487a70ec
MD5 af16d0dcc8fb4bddc8d5388d78dcd102
SHA1 97f8b3ac47ede62f2ac078c95c59ca42eda69104
SHA512 04994db68716de8728ea2b09027b774aa4cb4a1ec4257e9132382dafa667bc121f22866a8c09a6a184669ca02f0da508d0fd4d0e14384dc61471e7784928351f
SSDEEP 1536:vRiAXaKD5gxzmwYEM/D3ozc4I8JboecWtX4C:piAXaKDeKNnD36cb8tIC
TLSH
T1BFB39E02ABF0C7A5E0665DB506775B619E72FC6A2924832777D6B70FEC30F00EA25354
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

nzehj.dll

Path \??\c:\swxkwma\nzehj.dll
Size 46KB
SHA256 f57f9e54f4774c2b944fb070ae0c2a02cbb4b7686ab3207544c3ccaff0ff3dd9
MD5 a3fd41430ddcaa55fde840788925406a
SHA1 dbdd87f5c1bbf6a6f44c2e2c4744675d5e4e75c2
SHA512 23109572cfc9a282ea3ec84d93bfe02303d27f365ad2d9f47f6234f91da14c64f80133cc5e49746dfcb65d2454b7e7c13eff59ba4bbc18e09d2fb1c630ba59c9
SSDEEP 768:2sUfnvxs6iLlhpfFPtnQf7kifD/v7yb9Bh7Cb0VQJojZC/xjTk:2sJT1qf4W/vub9nnV1jZC/xE
TLSH
T19D2302C8A6F08EF3D2F90B7980E046DCDCFDB939877381150566008E7C71057FA446AA
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/2748-9-0x0000000010000000-0x000000001002E000-memory.dmp

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memory/2748-10-0x0000000010000000-0x000000001002E000-memory.dmp

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memory/2820-0-0x0000000000400000-0x000000000041A000-memory.dmp

Download

memory/2820-2-0x0000000000400000-0x000000000041A000-memory.dmp

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memory/4276-6-0x0000000000400000-0x000000000041A000-memory.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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