farfli | 8fadf11d3e88eea953c0d3c43d8624f2f7d44d98f41639dcf1149a6a321605aa

Analysis

max time kernel
148s
max time network
146s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260629-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260629-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
29/06/2026, 22:42

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General

Target
2026-06-25_466c483cdc8da4fd152ca4826fe02903_elex_wannacry.exe
Size 157KB
Sample260629-2mpdhsgz31
SHA256 8fadf11d3e88eea953c0d3c43d8624f2f7d44d98f41639dcf1149a6a321605aa
MD5 466c483cdc8da4fd152ca4826fe02903
SHA1 eec479c8e299e653965cbb00a81e5485f734fd7e
SHA512 ad6687d7804944d5105a35822db7676d9fee6c0c4adc116f5059ccb7153e8936eb9470f3f8e9d928643505368d4a0d56946a554ce8dac1398e02bd9a48ae7bde
SSDEEP 3072:KK4RNx65b4RoIwZpx10ZENfrGSQ7sDU/ySkNAq:Kl65xiZuKoDkySkNA
TLSH
T1FFF3D0CE1B7ACFDBE2201C74D0A416F792669CD9DB2147A74385FD9EB432D819C3212A
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

backdoor bootkit discovery farfli persistence spyware stealer

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/2948-10-0x0000000010000000-0x000000001002E000-memory.dmp	family_farfli
behavioral2/memory/2948-12-0x0000000010000000-0x000000001002E000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 2 IoCs

resource	yara_rule
behavioral2/memory/2948-10-0x0000000010000000-0x000000001002E000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/2948-12-0x0000000010000000-0x000000001002E000-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
2	2948	rundll32.exe
4	2948	rundll32.exe
3	2948	rundll32.exe
5	2948	rundll32.exe
7	2948	rundll32.exe
8	2948	rundll32.exe
10	2948	rundll32.exe
11	2948	rundll32.exe

Deletes itself 1 IoCs

pid	Process
408	yhifl.exe

Executes dropped EXE 1 IoCs

pid	Process
408	yhifl.exe

Loads dropped DLL 1 IoCs

pid	Process
2948	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-1-5-21-1086369643-1618123105-2567081378-1000\Software\Microsoft\Windows\CurrentVersion\Run\EvtMgr = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\drwto\\iygkc.dll\",init"	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)	\??\g:	rundll32.exe
File opened (read-only)	\??\i:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\o:	rundll32.exe
File opened (read-only)	\??\t:	rundll32.exe
File opened (read-only)	\??\w:	rundll32.exe
File opened (read-only)	\??\z:	rundll32.exe
File opened (read-only)	\??\j:	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)	\??\a:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.exe
File opened (read-only)	\??\d:	rundll32.exe
File opened (read-only)	\??\k:	rundll32.exe
File opened (read-only)	\??\n:	rundll32.exe
File opened (read-only)	\??\q:	rundll32.exe
File opened (read-only)	\??\r:	rundll32.exe
File opened (read-only)	\??\s:	rundll32.exe
File opened (read-only)	\??\h:	rundll32.exe
File opened (read-only)	\??\p:	rundll32.exe
File opened (read-only)	\??\x:	rundll32.exe
File opened (read-only)	\??\y:	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

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	2026-06-25_466c483cdc8da4fd152ca4826fe02903_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	yhifl.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
5596	PING.EXE
5308	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 value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	rundll32.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	rundll32.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
5596	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2948	rundll32.exe
2948	rundll32.exe
2948	rundll32.exe
2948	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2948	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
6116	2026-06-25_466c483cdc8da4fd152ca4826fe02903_elex_wannacry.exe
408	yhifl.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 6116 wrote to memory of 5308	6116	2026-06-25_466c483cdc8da4fd152ca4826fe02903_elex_wannacry.exe	87
PID 5308 wrote to memory of 5596	5308	cmd.exe	89
PID 5308 wrote to memory of 408	5308	cmd.exe	90
PID 408 wrote to memory of 2948	408	yhifl.exe	91

C:\Users\Admin\AppData\Local\Temp\2026-06-25_466c483cdc8da4fd152ca4826fe02903_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-06-25_466c483cdc8da4fd152ca4826fe02903_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:6116
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&c:\yhifl.exe "C:\Users\Admin\AppData\Local\Temp\2026-06-25_466c483cdc8da4fd152ca4826fe02903_elex_wannacry.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:5308
- - 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:5596
- - \??\c:\yhifl.exe
    c:\yhifl.exe "C:\Users\Admin\AppData\Local\Temp\2026-06-25_466c483cdc8da4fd152ca4826fe02903_elex_wannacry.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:408
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\drwto\iygkc.dll",init c:\yhifl.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:2948

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

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

iygkc.dll

Path \??\c:\drwto\iygkc.dll
Size 42KB
SHA256 c7c41689de030df0f78f471422fa2a6383b36e77c94e7f6f124a96feb3e27ed7
MD5 36e3fb5964d663272cf1169e1e1ca478
SHA1 58115e08b49505bcbbb5c88a28a86222ba18d5d4
SHA512 daff53b11aa400437a06287707a334a09661c1ef7d0fd8beaf1a874c79c16fe45bd1188343d0623e839d3ead5ea2dd90896e37ccf3b252c7220c74989a9ba442
SSDEEP 768:t0inj1jJ5OeUMhBNSqHvMjjAipMkuG30sv2xEZkWldADAKPIp:t0ipV5uMhBt0jjAiusv22ZkWTOAKP8
TLSH
T1D813E19B6BEC7029FDD22BB4F4F66815EEB63F388CB2C70E114941AB1C3A9D51251706
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

yhifl.exe

Path \??\c:\yhifl.exe
Size 157KB
SHA256 adbbd439bd6e52c154c847e85578367ed5fdcb95f47fa02c21dee570aebcab70
MD5 cb1f61cac820048fcbd5c7fb17ecc0c7
SHA1 9089a3d36f437ec40ba4d3279ee9a7aa30438809
SHA512 cfd5fda3ef8eff71a49c262d9dab211d8180f2a4cc7c6c5e0323dd10f9cd734f4cfb46e2b315beb7ab9bba1359f147f36b785532b7f145c3c1e1dc3b32a36982
SSDEEP 3072:KK4RNx65b4RoIwZpx10ZENfrGSQ7sDU/ySkNAqu:Kl65xiZuKoDkySkNAJ
TLSH
T1A1F3D0CE1B7ACFDBE1201C74D1A416F782669CD9EB2147A74385FD9EB432D819C3212A
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/408-6-0x0000000000400000-0x0000000000426000-memory.dmp

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memory/2948-9-0x0000000010000000-0x000000001002E000-memory.dmp

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memory/2948-11-0x0000000002370000-0x0000000002470000-memory.dmp

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memory/2948-10-0x0000000010000000-0x000000001002E000-memory.dmp

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memory/2948-12-0x0000000010000000-0x000000001002E000-memory.dmp

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memory/2948-13-0x0000000002370000-0x0000000002470000-memory.dmp

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memory/6116-0-0x0000000000400000-0x0000000000426000-memory.dmp

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memory/6116-2-0x0000000000400000-0x0000000000426000-memory.dmp

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