farfli | 16a46f8dd955dfb806a3c3eddccb176c4b2d1cf0db1dc2fad612533b859bdc94

Analysis

max time kernel
149s
max time network
146s
platform
windows10-2004_x64
resource
win10v2004-20260513-en
resource tags

arch:x64arch:x86image:win10v2004-20260513-enlocale:en-usos:windows10-2004-x64systemwindows
submitted
04/08/2026, 16:36

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General

Target
2026-08-04_180a524bd27f9179fee89da19c8e063c_elex_wannacry.exe
Size 86KB
Sample260804-t4e76ssxa1
SHA256 16a46f8dd955dfb806a3c3eddccb176c4b2d1cf0db1dc2fad612533b859bdc94
MD5 180a524bd27f9179fee89da19c8e063c
SHA1 f8383a1551dcc0ac8c7b0ba8b72a4b6e12a084ae
SHA512 d80c131fd9572ff36e4683c57eaa7a6cba9987f61f1c7dc6777f91d9742efee598ef2494759a4d8aa112c3d926eac6fa63d24a64995183f39d387a8ecac523c7
SSDEEP 1536:m/14ZaKO/myxZmAijMcCwVVydoM1bKAQAH9M53e+iWtnSd:a14ZaKOTZSMcJVgDKxAH9MhtfSd
TLSH
T16E83CF232FBB4175DD44AFB11E6B2665E6F2BD36212082728B5C9D8DAA3CF45DB0131C
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 3 IoCs

resource	yara_rule
behavioral1/memory/4460-12-0x0000000010000000-0x0000000010021000-memory.dmp	family_farfli
behavioral1/memory/4460-15-0x0000000010000000-0x0000000010021000-memory.dmp	family_farfli
behavioral1/memory/4460-16-0x0000000010000000-0x0000000010021000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 3 IoCs

resource	yara_rule
behavioral1/memory/4460-12-0x0000000010000000-0x0000000010021000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/4460-15-0x0000000010000000-0x0000000010021000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/4460-16-0x0000000010000000-0x0000000010021000-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
14	4460	rundll32.exe
15	4460	rundll32.exe
16	4460	rundll32.exe
20	4460	rundll32.exe
30	4460	rundll32.exe
42	4460	rundll32.exe
47	4460	rundll32.exe
50	4460	rundll32.exe

Deletes itself 1 IoCs

pid	Process
4572	eiseu.exe

Executes dropped EXE 1 IoCs

pid	Process
4572	eiseu.exe

Loads dropped DLL 1 IoCs

pid	Process
4460	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-1-5-21-668679576-120646659-2289335452-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\EvtMgr = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\dtyccc\\cflio.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)	\??\e:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\o:	rundll32.exe
File opened (read-only)	\??\v:	rundll32.exe
File opened (read-only)	\??\w:	rundll32.exe
File opened (read-only)	\??\z:	rundll32.exe
File opened (read-only)	\??\h:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\p:	rundll32.exe
File opened (read-only)	\??\q:	rundll32.exe
File opened (read-only)	\??\r:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\a:	rundll32.exe
File opened (read-only)	\??\g:	rundll32.exe
File opened (read-only)	\??\i:	rundll32.exe
File opened (read-only)	\??\k:	rundll32.exe
File opened (read-only)	\??\s:	rundll32.exe
File opened (read-only)	\??\y:	rundll32.exe
File opened (read-only)	\??\l:	rundll32.exe
File opened (read-only)	\??\n:	rundll32.exe
File opened (read-only)	\??\t:	rundll32.exe
File opened (read-only)	\??\x:	rundll32.exe
File opened (read-only)	\??\b:	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
1608	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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PING.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	eiseu.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-08-04_180a524bd27f9179fee89da19c8e063c_elex_wannacry.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
1608	cmd.exe
1076	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
1076	PING.EXE

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
4460	rundll32.exe
4460	rundll32.exe
4460	rundll32.exe
4460	rundll32.exe
4460	rundll32.exe
4460	rundll32.exe
4460	rundll32.exe
4460	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4460	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
4548	2026-08-04_180a524bd27f9179fee89da19c8e063c_elex_wannacry.exe
4572	eiseu.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 4548 wrote to memory of 1608	4548	2026-08-04_180a524bd27f9179fee89da19c8e063c_elex_wannacry.exe	89
PID 1608 wrote to memory of 1076	1608	cmd.exe	91
PID 1608 wrote to memory of 4572	1608	cmd.exe	93
PID 4572 wrote to memory of 4460	4572	eiseu.exe	94

C:\Users\Admin\AppData\Local\Temp\2026-08-04_180a524bd27f9179fee89da19c8e063c_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-08-04_180a524bd27f9179fee89da19c8e063c_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4548
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&c:\eiseu.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-04_180a524bd27f9179fee89da19c8e063c_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:1608
- - 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:1076
- - \??\c:\eiseu.exe
    c:\eiseu.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-04_180a524bd27f9179fee89da19c8e063c_elex_wannacry.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:4572
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\dtyccc\cflio.dll",GetWindowClass c:\eiseu.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:4460

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

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

eiseu.exe

Path C:\eiseu.exe
Size 86KB
SHA256 e85dd81d34b7f4cea146c9866a678c3c113af246a72906014fc340b9d22e6dcd
MD5 f912e5b5484a91436b0b82eda842b3c3
SHA1 b7d6901290404e92fe7215dfe0f9da70b292bf93
SHA512 97bace81b7efe44902e80e12773f833d6a9b5a1cadb36edfc8225a268f092aeb3939a8aececd7a3cfb015a92e3d752b3337c7c37822567d3d56e1a1c2edead7c
SSDEEP 1536:m/14ZaKO/myxZmAijMcCwVVydoM1bKAQAH9M53e+iWtnSdd:a14ZaKOTZSMcJVgDKxAH9MhtfSdd
TLSH
T1B293BF232FBB4175DD44AFB11F6B1665E6F2BC36212082728B5CA98DAA3CF45DB0131C
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

cflio.dll

Path \??\c:\dtyccc\cflio.dll
Size 43KB
SHA256 0b747c32730f2ad29b44299054bc22f8075702b081e91edaaead528abca227d2
MD5 0164aeb78f4d2181e817a9a6b0ad22f1
SHA1 c56c6a743e48e8652707a34e4cddc1f645f140ea
SHA512 e69ad90790d8062a903954f7ea85cacd241113afaf0eb16098f473835cffcda6e1f9fa9844a8618cc297fffa2e6ff7d458f9ebb2ce3febf7ffd683ffd6ad44f5
SSDEEP 768:2DdBa8mqIOiSUZrBGhvQLq6UYiaKRsRMwwY2BjkTrXW/VJZ581swUqHhiQREQoJs:kwqnPUb+v0q6UY+sRMwwY2Jkal+1ZUqJ
TLSH
T19613F133EACCDFDFF8A05271C576D0FCD337AC2849669A0395A0219D9D60948B878F66
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/4460-10-0x0000000010000000-0x0000000010021000-memory.dmp

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memory/4460-11-0x0000000000710000-0x0000000000712000-memory.dmp

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memory/4460-13-0x0000000000710000-0x0000000000712000-memory.dmp

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memory/4460-12-0x0000000010000000-0x0000000010021000-memory.dmp

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memory/4460-15-0x0000000010000000-0x0000000010021000-memory.dmp

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memory/4460-16-0x0000000010000000-0x0000000010021000-memory.dmp

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memory/4548-0-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/4548-2-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/4572-7-0x0000000000400000-0x0000000000417000-memory.dmp

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