farfli | a2146d5c28d8ddb03c5f9cf57b15779bc2c1edfa02b5ba956d5a2c60a6e269c5

Analysis

max time kernel
150s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20260130-en
resource tags

arch:x64arch:x86image:win10v2004-20260130-enlocale:en-usos:windows10-2004-x64systemwindows
submitted
07/05/2026, 02:58

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General

Target
2026-05-07_fcc808db421de2f1d5fdf19706dd379e_elex_wannacry.exe
Size 92KB
Sample260507-dgltfaet8s
SHA256 a2146d5c28d8ddb03c5f9cf57b15779bc2c1edfa02b5ba956d5a2c60a6e269c5
MD5 fcc808db421de2f1d5fdf19706dd379e
SHA1 2476ba4aacc45fae3800b4517a0e90b08f95e164
SHA512 45f3864141414454a974c074139637c156f2a5450b6d38672af811ab876fa4fd8c4e857af700b16ef8d2bffbb69808e6a57df8a974214e0efb6bddf0c3225371
SSDEEP 1536:TSSABNx6vb4RoI47zzzzzzzzzvfxzVzNrzzzgzzzzzzzzzzzzzzzz6zzzdzzzzlu:eSABNx6vb4RoI4pyjHYLhal01UoPX+hv
TLSH
T11C93BE07ABA989C9F1217C30556E373487BF985D3F1457979348EE4E9833D80EC3628A
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 4 IoCs

resource	yara_rule
behavioral1/memory/3184-10-0x0000000010000000-0x0000000010032000-memory.dmp	family_farfli
behavioral1/memory/3184-11-0x0000000010001000-0x0000000010021000-memory.dmp	family_farfli
behavioral1/memory/3184-12-0x0000000010000000-0x0000000010032000-memory.dmp	family_farfli
behavioral1/memory/3184-13-0x0000000010001000-0x0000000010021000-memory.dmp	family_farfli

Custom signature

Detects executables containing base64 encoded User Agent 2 IoCs

resource	yara_rule
behavioral1/memory/3184-10-0x0000000010000000-0x0000000010032000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/3184-12-0x0000000010000000-0x0000000010032000-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
11	3184	rundll32.exe
12	3184	rundll32.exe
13	3184	rundll32.exe
14	3184	rundll32.exe
18	3184	rundll32.exe
39	3184	rundll32.exe
44	3184	rundll32.exe
47	3184	rundll32.exe

ACProtect 1.3x - 1.4x DLL software 1 IoCs

Detects file using ACProtect software.

resource	yara_rule
behavioral1/files/0x0007000000024318-8.dat	acprotect

Deletes itself 1 IoCs

pid	Process
1248	skjlc.exe

Executes dropped EXE 1 IoCs

pid	Process
1248	skjlc.exe

Loads dropped DLL 1 IoCs

pid	Process
3184	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-1-5-21-2714754311-527593155-1440850301-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\EvtMgr = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\eeyfwsa\\pgese.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)	\??\t:	rundll32.exe
File opened (read-only)	\??\y:	rundll32.exe
File opened (read-only)	\??\z:	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)	\??\q:	rundll32.exe
File opened (read-only)	\??\s:	rundll32.exe
File opened (read-only)	\??\v:	rundll32.exe
File opened (read-only)	\??\w:	rundll32.exe
File opened (read-only)	\??\x:	rundll32.exe
File opened (read-only)	\??\a:	rundll32.exe
File opened (read-only)	\??\b:	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)	\??\p:	rundll32.exe
File opened (read-only)	\??\r:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\n:	rundll32.exe
File opened (read-only)	\??\e:	rundll32.exe
File opened (read-only)	\??\h:	rundll32.exe
File opened (read-only)	\??\l:	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	PING.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	skjlc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-05-07_fcc808db421de2f1d5fdf19706dd379e_elex_wannacry.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.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
2328	cmd.exe
1816	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 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
1816	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
3184	rundll32.exe
3184	rundll32.exe
3184	rundll32.exe
3184	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3184	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
4012	2026-05-07_fcc808db421de2f1d5fdf19706dd379e_elex_wannacry.exe
1248	skjlc.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 4012 wrote to memory of 2328	4012	2026-05-07_fcc808db421de2f1d5fdf19706dd379e_elex_wannacry.exe	84
PID 2328 wrote to memory of 1816	2328	cmd.exe	86
PID 2328 wrote to memory of 1248	2328	cmd.exe	87
PID 1248 wrote to memory of 3184	1248	skjlc.exe	88

C:\Users\Admin\AppData\Local\Temp\2026-05-07_fcc808db421de2f1d5fdf19706dd379e_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-05-07_fcc808db421de2f1d5fdf19706dd379e_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4012
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&c:\skjlc.exe "C:\Users\Admin\AppData\Local\Temp\2026-05-07_fcc808db421de2f1d5fdf19706dd379e_elex_wannacry.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:2328
- - 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:1816
- - \??\c:\skjlc.exe
    c:\skjlc.exe "C:\Users\Admin\AppData\Local\Temp\2026-05-07_fcc808db421de2f1d5fdf19706dd379e_elex_wannacry.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:1248
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\eeyfwsa\pgese.dll",DoVirusScan c:\skjlc.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:3184

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

skjlc.exe

Path C:\skjlc.exe
Size 92KB
SHA256 fce3db78cd8890df2ca69881c214cd4421042fc4dacbc22c76939a285fe1182f
MD5 c5c258d630173a8648e029fe58f4e282
SHA1 9d0580ec8e4f899c03f458b990b02946bbb00d27
SHA512 4fc57f5c3752fc7d671d2a7cb2edacbb666e4b7fd7b351633a06ba56e30d5f223becfce21ec89041b4b7fced3665cf0d9472b4abaeec751207c8fd6524f15f3f
SSDEEP 1536:TSSABNx6vb4RoI47zzzzzzzzzvfxzVzNrzzzgzzzzzzzzzzzzzzzz6zzzdzzzzlV:eSABNx6vb4RoI4pyjHYLhal01UoPX+h6
TLSH
T14193AE07ABA989C9F1217C30566E373187BF985D7F1457579348EE4EA833D80EC3628A
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

pgese.dll

Path \??\c:\eeyfwsa\pgese.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/1248-7-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/3184-10-0x0000000010000000-0x0000000010032000-memory.dmp

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memory/3184-11-0x0000000010001000-0x0000000010021000-memory.dmp

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memory/3184-12-0x0000000010000000-0x0000000010032000-memory.dmp

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memory/3184-13-0x0000000010001000-0x0000000010021000-memory.dmp

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memory/4012-0-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/4012-2-0x0000000000400000-0x0000000000417000-memory.dmp

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