farfli | 0ad6d14bf190ab5c8dfff2043c57596cbf56d3ce068260241fda4eb3fc0f2964

General

Target
2026-08-09_a6b2156372bda512ee11cd9957ba1e1a_elex_wannacry.exe
Size 123KB
Sample260809-lyltrsvfre
SHA256 0ad6d14bf190ab5c8dfff2043c57596cbf56d3ce068260241fda4eb3fc0f2964
MD5 a6b2156372bda512ee11cd9957ba1e1a
SHA1 6f6f96d1f96072d104613eb6ef8bdfa08d0c75a6
SHA512 26046c8f7bb2fdf5de85f9213235a7fc8ca841717c89ce29d97356117b57880e8f61a5b67cf3fda621de7158c90cf9a68c435f485fdd38466b65b62a67cf406a
SSDEEP 1536:f/6EkrKHqgGFs5N6s7H3dPT+X/O3DX6HZ9am1AEgHZ5bdpDvkDBlxZP1n6:fSKP3Pe/Oz67aKVgbbdpDcljZ9n6
TLSH
T1B0C3C0927A6085F0E01585331397AB318671AC5E7A1803EE93C8FE0FBD65625ECB729D
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

backdoor bootkit 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 2 IoCs

resource	yara_rule
behavioral2/memory/1188-9-0x0000000010000000-0x0000000010030000-memory.dmp	family_farfli
behavioral2/memory/1188-10-0x0000000010000000-0x0000000010030000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 2 IoCs

resource	yara_rule
behavioral2/memory/1188-9-0x0000000010000000-0x0000000010030000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/1188-10-0x0000000010000000-0x0000000010030000-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	1188	rundll32.exe
8	1188	rundll32.exe
9	1188	rundll32.exe
11	1188	rundll32.exe
12	1188	rundll32.exe
14	1188	rundll32.exe
15	1188	rundll32.exe
17	1188	rundll32.exe

Deletes itself 1 IoCs

pid	Process
2636	xmbyv.exe

Executes dropped EXE 1 IoCs

pid	Process
2636	xmbyv.exe

Loads dropped DLL 1 IoCs

pid	Process
1188	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-1-5-21-552508041-2681165170-3229858294-1000\Software\Microsoft\Windows\CurrentVersion\Run\EvtMgr = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\aasrp\\kncnb.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)	\??\a:	rundll32.exe
File opened (read-only)	\??\g:	rundll32.exe
File opened (read-only)	\??\k:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\n:	rundll32.exe
File opened (read-only)	\??\p:	rundll32.exe
File opened (read-only)	\??\v:	rundll32.exe
File opened (read-only)	\??\w:	rundll32.exe
File opened (read-only)	\??\l:	rundll32.exe
File opened (read-only)	\??\o:	rundll32.exe
File opened (read-only)	\??\t:	rundll32.exe
File opened (read-only)	\??\y:	rundll32.exe
File opened (read-only)	\??\z:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.exe
File opened (read-only)	\??\h:	rundll32.exe
File opened (read-only)	\??\i:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\r:	rundll32.exe
File opened (read-only)	\??\s:	rundll32.exe
File opened (read-only)	\??\d:	rundll32.exe
File opened (read-only)	\??\q:	rundll32.exe
File opened (read-only)	\??\u:	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

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4344-0-0x0000000000400000-0x000000000041E000-memory.dmp	upx
behavioral2/memory/4344-2-0x0000000000400000-0x000000000041E000-memory.dmp	upx
behavioral2/files/0x000700000001b888-3.dat	upx
behavioral2/memory/2636-6-0x0000000000400000-0x000000000041E000-memory.dmp	upx

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
2456	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	xmbyv.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-08-09_a6b2156372bda512ee11cd9957ba1e1a_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
2456	cmd.exe
4724	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
4724	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1188	rundll32.exe
1188	rundll32.exe
1188	rundll32.exe
1188	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1188	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
4344	2026-08-09_a6b2156372bda512ee11cd9957ba1e1a_elex_wannacry.exe
2636	xmbyv.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 4344 wrote to memory of 2456	4344	2026-08-09_a6b2156372bda512ee11cd9957ba1e1a_elex_wannacry.exe	89
PID 2456 wrote to memory of 4724	2456	cmd.exe	91
PID 2456 wrote to memory of 2636	2456	cmd.exe	92
PID 2636 wrote to memory of 1188	2636	xmbyv.exe	93

C:\Users\Admin\AppData\Local\Temp\2026-08-09_a6b2156372bda512ee11cd9957ba1e1a_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-08-09_a6b2156372bda512ee11cd9957ba1e1a_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4344
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\xmbyv.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-09_a6b2156372bda512ee11cd9957ba1e1a_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:2456
- - 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:4724
- - C:\Users\Admin\AppData\Local\Temp\xmbyv.exe
    C:\Users\Admin\AppData\Local\Temp\\xmbyv.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-09_a6b2156372bda512ee11cd9957ba1e1a_elex_wannacry.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:2636
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\aasrp\kncnb.dll",QueryPluginInterface C:\Users\Admin\AppData\Local\Temp\xmbyv.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:1188

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

xmbyv.exe

Path C:\Users\Admin\AppData\Local\Temp\xmbyv.exe
Size 123KB
SHA256 d1fb0c485fd9921248a0385222d2749d5492f7e521aeae2fb453e38190512aa0
MD5 bd959efb98a3b06843006b89f19200d7
SHA1 c9d5f175d2ffdc0d9e2a8882b28afd204236e3e5
SHA512 a16604e0c12b0b38bbf2af8a539ac66b16d9138add6cecd8e11a9e57ef9422bb40c285bf3e9acb60c897a18eaa4d95aebadf69a5e90ed6e645a2aa2f66289a5f
SSDEEP 1536:f/6EkrKHqgGFs5N6s7H3dPT+X/O3DX6HZ9am1AEgHZ5bdpDvkDBlxZP1n3:fSKP3Pe/Oz67aKVgbbdpDcljZ9n3
TLSH
T1A3C3C0927A6085F0E01645331397AB318671EC5E7A1803EF93C8FE0FBD65621ECB7299
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

kncnb.dll

Path \??\c:\aasrp\kncnb.dll
Size 59KB
SHA256 12264670242948b129acc4d9cd80cdf83fac88e662c09a57ce5ac6b39510618d
MD5 8552951ec6ab253e038ffc809235b08c
SHA1 c59e347bfebd96c0e4b60a0d33b5923fb137af55
SHA512 17864dfff89f397c647ec02926cfd639e33a05061cb6164756afd3d8c4e24281cba9c4770d16927ba56e1e02a139faf970748bfe07454f4528eab9f87e2c0cd9
SSDEEP 1536:x0u5H+DyujZ2uoHzCf/IYmRGMJnc7Z4ch:x04eDyY/oH8SIMJncNnh
TLSH
T12843F21CE351855BDAAB0672678F6F407A238A7F5B32485A914C2454BF3BE77C937380
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/1188-9-0x0000000010000000-0x0000000010030000-memory.dmp

Download

memory/1188-10-0x0000000010000000-0x0000000010030000-memory.dmp

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memory/2636-6-0x0000000000400000-0x000000000041E000-memory.dmp

Download

memory/4344-0-0x0000000000400000-0x000000000041E000-memory.dmp

Download

memory/4344-2-0x0000000000400000-0x000000000041E000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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