farfli | 4577d9d7666dba778a6963d5371f5f7b0974effdcdd44b45f0a08a612f1bed23

Analysis

max time kernel
150s
max time network
154s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260710-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260710-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
07/08/2026, 03:46

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General

Target
2026-08-07_b98d3fe46b2b42b915fc19cb1df4e749_elex_wannacry.exe
Size 272KB
Sample260807-ebnxaafm4v
SHA256 4577d9d7666dba778a6963d5371f5f7b0974effdcdd44b45f0a08a612f1bed23
MD5 b98d3fe46b2b42b915fc19cb1df4e749
SHA1 2be0811b740bd7bd71c90218508700ac0e88b1ae
SHA512 4c128a4db5f5a724b5c5c4c42a1b4a84f534671367dde4e3e0fc3d721e69d6e336c1968d1d6eb2dc263c4629aeae7c8834ead68bc2f881bfc132237d3aae1c0b
SSDEEP 6144:H8AbwMmJOyOK5ZV7NHPR519jtr5a8MueZG7H9:PwVJOp8FNprdrMul7d
TLSH
T1BC54CE11F621C945E4724C3177AE59388764FC19EB4CA643E3F86B0FDC2EE92A93C256
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

backdoor bootkit discovery execution farfli persistence spyware stealer upx

Malware Config

Signatures

Family: Farfli
Farfli is a Windows backdoor written in C++.
backdoor farfli

Detects Farfli Backdoor 3 IoCs

resource	yara_rule
behavioral2/memory/4944-10-0x0000000010000000-0x000000001003D000-memory.dmp	family_farfli
behavioral2/memory/4944-12-0x0000000010000000-0x000000001003D000-memory.dmp	family_farfli
behavioral2/memory/4944-15-0x0000000010000000-0x000000001003D000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 3 IoCs

resource	yara_rule
behavioral2/memory/4944-10-0x0000000010000000-0x000000001003D000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/4944-12-0x0000000010000000-0x000000001003D000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/4944-15-0x0000000010000000-0x000000001003D000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

UPX dump on OEP (original entry point) 6 IoCs

resource	yara_rule
behavioral2/memory/4156-6-0x0000000000400000-0x000000000043A000-memory.dmp	UPX
behavioral2/files/0x000d00000001c58d-7.dat	UPX
behavioral2/memory/4944-9-0x0000000010000000-0x000000001003D000-memory.dmp	UPX
behavioral2/memory/4944-10-0x0000000010000000-0x000000001003D000-memory.dmp	UPX
behavioral2/memory/4944-12-0x0000000010000000-0x000000001003D000-memory.dmp	UPX
behavioral2/memory/4944-15-0x0000000010000000-0x000000001003D000-memory.dmp	UPX

Badlisted process makes network request 4 IoCs

Network request originating from process or tool commonly abused by malware.

flow	pid	Process
1	4944	rundll32.exe
3	4944	rundll32.exe
4	4944	rundll32.exe
5	4944	rundll32.exe

Deletes itself 1 IoCs

pid	Process
4156	zejcn.exe

Executes dropped EXE 1 IoCs

pid	Process
4156	zejcn.exe

Loads dropped DLL 1 IoCs

pid	Process
4944	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-1-5-21-2246396966-3025826688-3847171515-1000\Software\Microsoft\Windows\CurrentVersion\Run\EvtMgr = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\peqlh\\vigka.ikv\",RAFlush"	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)	\??\d:	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)	\??\o:	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)	\??\h:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\l:	rundll32.exe
File opened (read-only)	\??\s:	rundll32.exe
File opened (read-only)	\??\t:	rundll32.exe
File opened (read-only)	\??\x:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.exe
File opened (read-only)	\??\k:	rundll32.exe
File opened (read-only)	\??\p:	rundll32.exe
File opened (read-only)	\??\q:	rundll32.exe
File opened (read-only)	\??\w:	rundll32.exe
File opened (read-only)	\??\y:	rundll32.exe
File opened (read-only)	\??\z:	rundll32.exe
File opened (read-only)	\??\v:	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

UPX packed file 5 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral2/files/0x000d00000001c58d-7.dat	upx
behavioral2/memory/4944-9-0x0000000010000000-0x000000001003D000-memory.dmp	upx
behavioral2/memory/4944-10-0x0000000010000000-0x000000001003D000-memory.dmp	upx
behavioral2/memory/4944-12-0x0000000010000000-0x000000001003D000-memory.dmp	upx
behavioral2/memory/4944-15-0x0000000010000000-0x000000001003D000-memory.dmp	upx

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
1320	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	2026-08-07_b98d3fe46b2b42b915fc19cb1df4e749_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	zejcn.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
1320	cmd.exe
3144	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
3144	PING.EXE

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
4944	rundll32.exe
4944	rundll32.exe
4944	rundll32.exe
4944	rundll32.exe
4944	rundll32.exe
4944	rundll32.exe
4944	rundll32.exe
4944	rundll32.exe
4944	rundll32.exe
4944	rundll32.exe
4944	rundll32.exe
4944	rundll32.exe
4944	rundll32.exe
4944	rundll32.exe
4944	rundll32.exe
4944	rundll32.exe
4944	rundll32.exe
4944	rundll32.exe
4944	rundll32.exe
4944	rundll32.exe
4944	rundll32.exe
4944	rundll32.exe
4944	rundll32.exe
4944	rundll32.exe
4944	rundll32.exe
4944	rundll32.exe
4944	rundll32.exe
4944	rundll32.exe
4944	rundll32.exe
4944	rundll32.exe
4944	rundll32.exe
4944	rundll32.exe
4944	rundll32.exe
4944	rundll32.exe
4944	rundll32.exe
4944	rundll32.exe
4944	rundll32.exe
4944	rundll32.exe
4944	rundll32.exe
4944	rundll32.exe
4944	rundll32.exe
4944	rundll32.exe
4944	rundll32.exe
4944	rundll32.exe
4944	rundll32.exe
4944	rundll32.exe
4944	rundll32.exe
4944	rundll32.exe
4944	rundll32.exe
4944	rundll32.exe
4944	rundll32.exe
4944	rundll32.exe
4944	rundll32.exe
4944	rundll32.exe
4944	rundll32.exe
4944	rundll32.exe
4944	rundll32.exe
4944	rundll32.exe
4944	rundll32.exe
4944	rundll32.exe
4944	rundll32.exe
4944	rundll32.exe
4944	rundll32.exe
4944	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4944	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
5860	2026-08-07_b98d3fe46b2b42b915fc19cb1df4e749_elex_wannacry.exe
4156	zejcn.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 5860 wrote to memory of 1320	5860	2026-08-07_b98d3fe46b2b42b915fc19cb1df4e749_elex_wannacry.exe	89
PID 1320 wrote to memory of 3144	1320	cmd.exe	91
PID 1320 wrote to memory of 4156	1320	cmd.exe	92
PID 4156 wrote to memory of 4944	4156	zejcn.exe	93

C:\Users\Admin\AppData\Local\Temp\2026-08-07_b98d3fe46b2b42b915fc19cb1df4e749_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-08-07_b98d3fe46b2b42b915fc19cb1df4e749_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:5860
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\zejcn.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-07_b98d3fe46b2b42b915fc19cb1df4e749_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:1320
- - 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:3144
- - C:\Users\Admin\AppData\Local\Temp\zejcn.exe
    C:\Users\Admin\AppData\Local\Temp\\zejcn.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-07_b98d3fe46b2b42b915fc19cb1df4e749_elex_wannacry.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:4156
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\peqlh\vigka.ikv",RAFlush C:\Users\Admin\AppData\Local\Temp\zejcn.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:4944

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k GPSvcGroup
1⤵
PID:3172

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

zejcn.exe

Path C:\Users\Admin\AppData\Local\Temp\zejcn.exe
Size 272KB
SHA256 1288d6613047acca2a896c7f201a8194223de27910e59c64e76a973ae294f073
MD5 d2b79ce0337d9e3ef868d7d3a742e942
SHA1 1bf76babe7abf219eb52e098007199617186d82f
SHA512 a42b1bff6d98a35ddfcd96e5210d8190f2c7a200d57814cee9fcbe2ba547f7b307603a64ea4c64d92d79a2e31c13c836dc239e3f44540633d5ea420472456f71
SSDEEP 6144:H8AbwMmJOyOK5ZV7NHPR519jtr5a8MueZG7Hc:PwVJOp8FNprdrMul78
TLSH
T1BA54CE11F621C945E4724C3177AE59388764FC19EB4CA643E3F86B0FDC2EE92A93C256
MD5 SHA1 SHA512 SSDEEP TLSH

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vigka.ikv

Path \??\c:\peqlh\vigka.ikv
Size 81KB
SHA256 2973a0957bd204e123307415bade58f84cdf272c659048a99bf42dfdb563415a
MD5 fe3b1b222244f783fe9927ff16813c45
SHA1 69c88427b6fe1b75b4f5dc51d7dcce1bc438de9b
SHA512 ad16236d7b0bca4f021d031c8c75c5a339218f6e27dd8be62dfc3719cf945ba832ec6c4c04483622431ed545125415ca03a636a22b2d4f13cc9545fffbe7bd64
SSDEEP 1536:gz2wGkhJuwe4428NPz+Sczth8kgodmbxLhevko1pLHKDwJ:gzzTw4kN7TEtmbFhebJKsJ
TLSH
T1D783AD8AEB9E4B3EE84D4633AD929D31DC27FB5526588F7A43FC102CEE46752B200107
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/4156-6-0x0000000000400000-0x000000000043A000-memory.dmp

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memory/4944-9-0x0000000010000000-0x000000001003D000-memory.dmp

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memory/4944-10-0x0000000010000000-0x000000001003D000-memory.dmp

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memory/4944-12-0x0000000010000000-0x000000001003D000-memory.dmp

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memory/4944-15-0x0000000010000000-0x000000001003D000-memory.dmp

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memory/5860-0-0x0000000000400000-0x000000000043A000-memory.dmp

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memory/5860-2-0x0000000000400000-0x000000000043A000-memory.dmp

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