farfli | c63cd22b9408a5349a345cef714a203146d4c6127b9f88c587e89b2352bf1322

Analysis

max time kernel
150s
max time network
145s
platform
windows10-2004_x64
resource
win10v2004-20260911-en
resource tags

arch:x64arch:x86image:win10v2004-20260911-enlocale:en-usos:windows10-2004-x64systemwindows
submitted
24/10/2026, 00:05

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General

Target
2026-10-22_b25c29169f3b6e885a94e76e4d59e191_elex_wannacry.exe
Size 93KB
Sample261024-adc6caex6s
SHA256 c63cd22b9408a5349a345cef714a203146d4c6127b9f88c587e89b2352bf1322
MD5 b25c29169f3b6e885a94e76e4d59e191
SHA1 d5d7549c73d84290d66d2c548a34c6324daa40e3
SHA512 d3017aa095f0bbfebf275ac76067869d5028cd1944fc73065cf14fec4aff468c89bc0462c259cf6fa02771a4185470051300a04180ea674e9d7e47ca1b0739d7
SSDEEP 1536:vRiAXaKD5gxzmwYEM/D3ozc4I8JboecWtX4:piAXaKDeKNnD36cb8tI
TLSH
T1CD93BE46ABF08761E0618DB509735B629EB3BC2B1930865B7BD3BA1E9C34F40EE21315
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

backdoor bootkit defense_evasion discovery execution farfli persistence spyware stealer

Malware Config

Signatures

Family: Farfli
Farfli is a Windows backdoor written in C++.
backdoor farfli

Detects Farfli Backdoor 4 IoCs

resource	yara_rule
behavioral1/memory/3220-10-0x0000000010000000-0x000000001002E000-memory.dmp	family_farfli
behavioral1/memory/3220-11-0x0000000010001000-0x000000001001E000-memory.dmp	family_farfli
behavioral1/memory/3220-12-0x0000000010000000-0x000000001002E000-memory.dmp	family_farfli
behavioral1/memory/3220-13-0x0000000010001000-0x000000001001E000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 2 IoCs

resource	yara_rule
behavioral1/memory/3220-10-0x0000000010000000-0x000000001002E000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/3220-12-0x0000000010000000-0x000000001002E000-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
10	3220	rundll32.exe
11	3220	rundll32.exe
12	3220	rundll32.exe
19	3220	rundll32.exe
32	3220	rundll32.exe
35	3220	rundll32.exe
40	3220	rundll32.exe
41	3220	rundll32.exe

Deletes itself 1 TTPs 1 IoCs

defense_evasion

File Deletion

T1070.004

pid	Process
3276	aifteosg.exe

Executes dropped EXE 1 IoCs

pid	Process
3276	aifteosg.exe

Loads dropped DLL 1 IoCs

pid	Process
3220	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-1-5-21-240542094-4193773837-3211495583-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\EvtMgr = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\awicbhn\\yfmcp.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)	\??\r:	rundll32.exe
File opened (read-only)	\??\v:	rundll32.exe
File opened (read-only)	\??\a:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.exe
File opened (read-only)	\??\e:	rundll32.exe
File opened (read-only)	\??\t:	rundll32.exe
File opened (read-only)	\??\k:	rundll32.exe
File opened (read-only)	\??\l:	rundll32.exe
File opened (read-only)	\??\n:	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)	\??\x:	rundll32.exe
File opened (read-only)	\??\y:	rundll32.exe
File opened (read-only)	\??\h:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\z:	rundll32.exe
File opened (read-only)	\??\g:	rundll32.exe
File opened (read-only)	\??\i:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\o:	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
3952	cmd.exe

Reads the TCP/IP host and domain name from the registry 1 TTPs 2 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	rundll32.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Domain	rundll32.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	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-10-22_b25c29169f3b6e885a94e76e4d59e191_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	aifteosg.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
536	PING.EXE
3952	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
536	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
3220	rundll32.exe
3220	rundll32.exe
3220	rundll32.exe
3220	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3220	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
1468	2026-10-22_b25c29169f3b6e885a94e76e4d59e191_elex_wannacry.exe
3276	aifteosg.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1468 wrote to memory of 3952	1468	2026-10-22_b25c29169f3b6e885a94e76e4d59e191_elex_wannacry.exe	85
PID 3952 wrote to memory of 536	3952	cmd.exe	87
PID 3952 wrote to memory of 3276	3952	cmd.exe	88
PID 3276 wrote to memory of 3220	3276	aifteosg.exe	89

C:\Users\Admin\AppData\Local\Temp\2026-10-22_b25c29169f3b6e885a94e76e4d59e191_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-10-22_b25c29169f3b6e885a94e76e4d59e191_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1468
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&c:\aifteosg.exe "C:\Users\Admin\AppData\Local\Temp\2026-10-22_b25c29169f3b6e885a94e76e4d59e191_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:3952
- - 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:536
- - \??\c:\aifteosg.exe
    c:\aifteosg.exe "C:\Users\Admin\AppData\Local\Temp\2026-10-22_b25c29169f3b6e885a94e76e4d59e191_elex_wannacry.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:3276
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\awicbhn\yfmcp.dll",GetWindowClass c:\aifteosg.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)
      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:3220

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

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Downloads

aifteosg.exe

Path C:\aifteosg.exe
Size 93KB
SHA256 6583ad126a0e5890920eeb410250f94ee5974a159d304d453a18facb8fd8aeb6
MD5 59ea34adfbf23b70bc1997b09a2354d8
SHA1 2b0d46a840c165edd90cbfe0d351592e4a91c557
SHA512 b8ddf3d8d8cfec57cd134322b024588c9316d7802848c9fe33e553ba315fb2e61696633cf0db615b358ff6d12c3927a383429c7fdf440167530d358fe15a7929
SSDEEP 1536:vRiAXaKD5gxzmwYEM/D3ozc4I8JboecWtX4f:piAXaKDeKNnD36cb8tIf
TLSH
T15693BE46ABF08761E0618DB509735B629EB3FC2B1934865B7BD3BA1E9C34F40EE21315
MD5 SHA1 SHA512 SSDEEP TLSH

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yfmcp.dll

Path \??\c:\awicbhn\yfmcp.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

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memory/1468-0-0x0000000000400000-0x000000000041A000-memory.dmp

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memory/1468-2-0x0000000000400000-0x000000000041A000-memory.dmp

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memory/3220-10-0x0000000010000000-0x000000001002E000-memory.dmp

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memory/3220-11-0x0000000010001000-0x000000001001E000-memory.dmp

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memory/3220-12-0x0000000010000000-0x000000001002E000-memory.dmp

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memory/3220-13-0x0000000010001000-0x000000001001E000-memory.dmp

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memory/3276-7-0x0000000000400000-0x000000000041A000-memory.dmp

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