farfli | 2bc5cdc6c903b8c329196b6cef81d6b1b554123111e68998cabb3e849569c8d4

General

Target
2026-08-21_0b88328ca75977958997487d01eee35d_elex_wannacry.exe
Size 96KB
Sample260821-g71bashq2z
SHA256 2bc5cdc6c903b8c329196b6cef81d6b1b554123111e68998cabb3e849569c8d4
MD5 0b88328ca75977958997487d01eee35d
SHA1 8484a565d38bf3a592f7099238ca793c5d2b553d
SHA512 4f7e195143acfd619388523ed0b418924ad9e7d92755fd3d706d3268d1da87b0cb4a3396321073f1721ea2ef418e62efbfbde7c786fbaf2df38f8c2fab4f54e5
SSDEEP 3072:eSABNx6vb4RoI4pyjHYLhal01UoPX+hwo6:el69Ml0TE
TLSH
T1B6A3AE13ABA589D9F1217C70566E373187BF985E3F1457639348EE4EA433D80EC3628A
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 1 IoCs

resource	yara_rule
behavioral2/memory/3100-10-0x0000000010000000-0x0000000010032000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 1 IoCs

resource	yara_rule
behavioral2/memory/3100-10-0x0000000010000000-0x0000000010032000-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
6	3100	rundll32.exe
7	3100	rundll32.exe
8	3100	rundll32.exe
10	3100	rundll32.exe
11	3100	rundll32.exe
12	3100	rundll32.exe
13	3100	rundll32.exe
14	3100	rundll32.exe

ACProtect 1.3x - 1.4x DLL software 1 IoCs

Detects file using ACProtect software.

resource	yara_rule
behavioral2/files/0x000e00000001c537-7.dat	acprotect

Deletes itself 1 IoCs

pid	Process
5972	aafrwn.exe

Executes dropped EXE 1 IoCs

pid	Process
5972	aafrwn.exe

Loads dropped DLL 1 IoCs

pid	Process
3100	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-1-5-21-3797332335-34111092-3597280141-1000\Software\Microsoft\Windows\CurrentVersion\Run\EvtMgr = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\gnaigusoi\\jccrsh.dll\",DoVirusScan"	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)	\??\y:	rundll32.exe
File opened (read-only)	\??\i:	rundll32.exe
File opened (read-only)	\??\t:	rundll32.exe
File opened (read-only)	\??\v:	rundll32.exe
File opened (read-only)	\??\z:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.exe
File opened (read-only)	\??\g:	rundll32.exe
File opened (read-only)	\??\l:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\j:	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)	\??\u:	rundll32.exe
File opened (read-only)	\??\x:	rundll32.exe
File opened (read-only)	\??\p:	rundll32.exe
File opened (read-only)	\??\a:	rundll32.exe
File opened (read-only)	\??\d:	rundll32.exe
File opened (read-only)	\??\h:	rundll32.exe
File opened (read-only)	\??\o:	rundll32.exe
File opened (read-only)	\??\w:	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
3364	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	2026-08-21_0b88328ca75977958997487d01eee35d_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	aafrwn.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
3364	cmd.exe
3588	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
3588	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
3100	rundll32.exe
3100	rundll32.exe
3100	rundll32.exe
3100	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3100	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
4128	2026-08-21_0b88328ca75977958997487d01eee35d_elex_wannacry.exe
5972	aafrwn.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 4128 wrote to memory of 3364	4128	2026-08-21_0b88328ca75977958997487d01eee35d_elex_wannacry.exe	89
PID 3364 wrote to memory of 3588	3364	cmd.exe	91
PID 3364 wrote to memory of 5972	3364	cmd.exe	92
PID 5972 wrote to memory of 3100	5972	aafrwn.exe	93

C:\Users\Admin\AppData\Local\Temp\2026-08-21_0b88328ca75977958997487d01eee35d_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-08-21_0b88328ca75977958997487d01eee35d_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4128
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&c:\aafrwn.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-21_0b88328ca75977958997487d01eee35d_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:3364
- - 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:3588
- - \??\c:\aafrwn.exe
    c:\aafrwn.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-21_0b88328ca75977958997487d01eee35d_elex_wannacry.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:5972
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\gnaigusoi\jccrsh.dll",DoVirusScan c:\aafrwn.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:3100

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

aafrwn.exe

Path \??\c:\aafrwn.exe
Size 96KB
SHA256 ea60adb9133449893314b4f2f3fa3eb90fab33c3154cc30c59d9607e1445ff8e
MD5 2fb9d7b2c7e53edd98c3d5a29e9cf429
SHA1 d1c399265b0ef1084b7b12debf5084f56ad4e09f
SHA512 93a9b7aeeda502d224d19c821f1dc8209b158d7d0410647ebb9ddfb3d2d6f1058229fbe8ca2789fb5c114a7c71de6d10b75cb28d35d2e224aa6e4cd805e762c3
SSDEEP 3072:eSABNx6vb4RoI4pyjHYLhal01UoPX+hwo65:el69Ml0TEC
TLSH
T16FA39D13ABA589D9F1217C70566D373187BED85E3F1457639348EE4EA433E80EC3628A
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

jccrsh.dll

Path \??\c:\gnaigusoi\jccrsh.dll
Size 50KB
SHA256 b2d21c40c5bfc0f7695945946fa1cdd4eaf2f66a8391ddde6307c5f765fbf525
MD5 cbfc06794d16ace6adf42210183fc1b9
SHA1 74fc68a2af225b0aca954b3684940747511013c5
SHA512 181dbe8b63e28a81cb8e0b7240df8745da350e1ab433b157b8b4fd36aa10f0782e807c09563bcffe37cfe64aa1b514b2cc1f179fbcba422d96867179d88e13c9
SSDEEP 768:Z+arYIR3u5v4bGwCl56LNQQe5JBtGf1oTYtx/qQvorLOpqPJ/UP2Gy+OIudD05:ZPrG57TzDxJS6Etx/Zv2OwSy+OIOD05
TLSH
T15733F1ACE2F064F5D0AF6B345952225CF5C26F238D3190DB4A8214BF3C32A5B5B5E721
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/3100-9-0x0000000010000000-0x0000000010032000-memory.dmp

Download

memory/3100-10-0x0000000010000000-0x0000000010032000-memory.dmp

Download

memory/4128-0-0x0000000000400000-0x0000000000417000-memory.dmp

Download

memory/4128-2-0x0000000000400000-0x0000000000417000-memory.dmp

Download

memory/5972-6-0x0000000000400000-0x0000000000417000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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