farfli | 9d05c6c891fb98b0957bf55c69022fb2f8169d75bc8f1c23df7da2376bd33e1a

Analysis

max time kernel
149s
max time network
136s
platform
windows10-2004_x64
resource
win10v2004-20260911-en
resource tags

arch:x64arch:x86image:win10v2004-20260911-enlocale:en-usos:windows10-2004-x64systemwindows
submitted
30/09/2026, 04:25

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General

Target
2026-09-29_228565530df88aff0a29a5ae8d342dc9_elex_wannacry.exe
Size 116KB
Sample260930-e1y4jsxanc
SHA256 9d05c6c891fb98b0957bf55c69022fb2f8169d75bc8f1c23df7da2376bd33e1a
MD5 228565530df88aff0a29a5ae8d342dc9
SHA1 e007f3bec6c284b7d856c70a2f3269361cff46b6
SHA512 c74dc9a6a748810b66f1bf4c8057a0bb8f66a54eee2aba409951495e8ccb811c6e62f6bb93de93bbca0889256e73449fbe541ad82be0fb7b665a416c5b0ef67d
SSDEEP 1536:N/14ZaKO/mHFqDMt8vdDMwgUmyZRTzeueKXOYDoAQLG7Y1iWtXoal:Z14ZaKOytU//RXeu7OWoAQJpYal
TLSH
T1AEC34B0327F98065F0B63EB3567A19204AB2BCD96D34CE1E4F54664E9970F30DE63366
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 5 IoCs

resource	yara_rule
behavioral1/memory/5084-12-0x0000000010000000-0x0000000010020000-memory.dmp	family_farfli
behavioral1/memory/5084-15-0x0000000010000000-0x0000000010020000-memory.dmp	family_farfli
behavioral1/memory/5084-16-0x0000000010000000-0x0000000010020000-memory.dmp	family_farfli
behavioral1/memory/5084-17-0x0000000010000000-0x0000000010020000-memory.dmp	family_farfli
behavioral1/memory/5084-18-0x0000000010000000-0x0000000010020000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 5 IoCs

resource	yara_rule
behavioral1/memory/5084-12-0x0000000010000000-0x0000000010020000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/5084-15-0x0000000010000000-0x0000000010020000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/5084-16-0x0000000010000000-0x0000000010020000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/5084-17-0x0000000010000000-0x0000000010020000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/5084-18-0x0000000010000000-0x0000000010020000-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
22	5084	rundll32.exe
27	5084	rundll32.exe
28	5084	rundll32.exe
29	5084	rundll32.exe
54	5084	rundll32.exe
55	5084	rundll32.exe
62	5084	rundll32.exe
64	5084	rundll32.exe

Deletes itself 1 TTPs 1 IoCs

defense_evasion

File Deletion

T1070.004

pid	Process
3084	qumajqbix.exe

Executes dropped EXE 1 IoCs

pid	Process
3084	qumajqbix.exe

Loads dropped DLL 1 IoCs

pid	Process
5084	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-1-5-21-2091445952-3649787497-104050984-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\EvtMgr = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\cekna\\ywcpf.dll\",GetWindowClass"	rundll32.exe

Enumerates connected drives 3 TTPs 24 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)	\??\h:	rundll32.exe
File opened (read-only)	\??\i:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\n:	rundll32.exe
File opened (read-only)	\??\s:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\q:	rundll32.exe
File opened (read-only)	\??\r:	rundll32.exe
File opened (read-only)	\??\t:	rundll32.exe
File opened (read-only)	\??\v:	rundll32.exe
File opened (read-only)	\??\w:	rundll32.exe
File opened (read-only)	\??\y:	rundll32.exe
File opened (read-only)	\??\g:	rundll32.exe
File opened (read-only)	\??\j:	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)	\??\z:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.exe
	\??\f:\	rundll32.exe
File opened (read-only)	\??\o:	rundll32.exe
File opened (read-only)	\??\x:	rundll32.exe
File opened (read-only)	\??\a:	rundll32.exe
File opened (read-only)	\??\e:	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
4876	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	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-09-29_228565530df88aff0a29a5ae8d342dc9_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	qumajqbix.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
4876	cmd.exe
2684	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
2684	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
5084	rundll32.exe
5084	rundll32.exe
5084	rundll32.exe
5084	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	5084	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
4792	2026-09-29_228565530df88aff0a29a5ae8d342dc9_elex_wannacry.exe
3084	qumajqbix.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 4792 wrote to memory of 4876	4792	2026-09-29_228565530df88aff0a29a5ae8d342dc9_elex_wannacry.exe	84
PID 4876 wrote to memory of 2684	4876	cmd.exe	86
PID 4876 wrote to memory of 3084	4876	cmd.exe	90
PID 3084 wrote to memory of 5084	3084	qumajqbix.exe	91

C:\Users\Admin\AppData\Local\Temp\2026-09-29_228565530df88aff0a29a5ae8d342dc9_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-09-29_228565530df88aff0a29a5ae8d342dc9_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4792
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&c:\qumajqbix.exe "C:\Users\Admin\AppData\Local\Temp\2026-09-29_228565530df88aff0a29a5ae8d342dc9_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:4876
- - 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:2684
- - \??\c:\qumajqbix.exe
    c:\qumajqbix.exe "C:\Users\Admin\AppData\Local\Temp\2026-09-29_228565530df88aff0a29a5ae8d342dc9_elex_wannacry.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:3084
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\cekna\ywcpf.dll",GetWindowClass c:\qumajqbix.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:5084

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

qumajqbix.exe

Path C:\qumajqbix.exe
Size 116KB
SHA256 78b0f4557cb16df95f380a3f2503c7fd7e69f61e4be445a96f1ac93c59cf5cae
MD5 9ec0fc4b217442a1fe8edd7704e1ca13
SHA1 df44389382226b0d2ac8c71d464dfc99be356716
SHA512 68572fee5c4e4e6f3ece51f93192c80a3e79470f7fef01ce3eb95cc2dd2fc9d14394df751252ab2f955dcacce40954561863782da44fa8ff269a77e086e59aee
SSDEEP 1536:N/14ZaKO/mHFqDMt8vdDMwgUmyZRTzeueKXOYDoAQLG7Y1iWtXoaX:Z14ZaKOytU//RXeu7OWoAQJpYaX
TLSH
T17CC34B0327F98164F0B63EB3567A19204AB2BCD96D34CE1E4F94664E9970F30DE63366
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

ywcpf.dll

Path \??\c:\cekna\ywcpf.dll
Size 42KB
SHA256 c667caef3521735f1179dbb8e175cc34aeccb3c4ca99a33b6439f5434ad13297
MD5 fbb8994174071ab6aeee5a03ff4146c0
SHA1 53778e5cf624302ebc20bacab571402aa10bd991
SHA512 3f83a6556c5bed000e02a47f01dacb08a50517fd20670fcbb06f0a3d3bb7ea6d1d5a6ad0132f21450f900a10f5c994fd7ee20f3a2caea5da6ac09f67fa591a77
SSDEEP 768:repK1xR2eqF+ln9wUpfL8WjTkXaKf1YuwWvScERZk8mIYkJWAEvU:S82eqFi9Ppf4Wjl2bwEEuIYdAE
TLSH
T11113E173BFE82954D4EA4B3399E2C59EC232EC310682C26EB510926F3D70759DA53387
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/3084-7-0x0000000000400000-0x000000000041C000-memory.dmp

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memory/4792-0-0x0000000000400000-0x000000000041C000-memory.dmp

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memory/4792-2-0x0000000000400000-0x000000000041C000-memory.dmp

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memory/5084-11-0x0000000000BE0000-0x0000000000BE2000-memory.dmp

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memory/5084-10-0x0000000010000000-0x0000000010020000-memory.dmp

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memory/5084-12-0x0000000010000000-0x0000000010020000-memory.dmp

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memory/5084-13-0x0000000000BE0000-0x0000000000BE2000-memory.dmp

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memory/5084-15-0x0000000010000000-0x0000000010020000-memory.dmp

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memory/5084-16-0x0000000010000000-0x0000000010020000-memory.dmp

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memory/5084-17-0x0000000010000000-0x0000000010020000-memory.dmp

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memory/5084-18-0x0000000010000000-0x0000000010020000-memory.dmp

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