farfli | 1696b2fea5108eac6e0c5c7f0217d98b73859d1498b4688b556a0e6cb1a54d42

Analysis

max time kernel
149s
max time network
152s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260911-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260911-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
12/11/2026, 19:09

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General

Target
2026-11-12_ae2ce4fa0af1331e9d0e4378dbb23777_elex_wannacry.exe
Size 272KB
Sample261112-xtwc7abs6t
SHA256 1696b2fea5108eac6e0c5c7f0217d98b73859d1498b4688b556a0e6cb1a54d42
MD5 ae2ce4fa0af1331e9d0e4378dbb23777
SHA1 f481e5238dd3de59acc02a2546df555f77be9e10
SHA512 57b8aa614edccb50eda73e02471cc597f6affe3c8d49c5c6c1a3f0785bb006f948707207d111dc9b6385977c340c790bb13500ce5b42f8b2221dfb7d23547c8e
SSDEEP 6144:H8AbwMmJOyOK5ZV7NHPR519jtr5a8MueZG7H:PwVJOp8FNprdrMul7
TLSH
T1E854CE11F621C945E4724C3177AE59298764FC19EB4CB243E3F86B0FDC2EE92A93C256
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

backdoor bootkit defense_evasion 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/2692-10-0x0000000010000000-0x000000001003D000-memory.dmp	family_farfli
behavioral2/memory/2692-12-0x0000000010000000-0x000000001003D000-memory.dmp	family_farfli
behavioral2/memory/2692-15-0x0000000010000000-0x000000001003D000-memory.dmp	family_farfli

Custom signature

Detects executables containing base64 encoded User Agent 3 IoCs

resource	yara_rule
behavioral2/memory/2692-10-0x0000000010000000-0x000000001003D000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/2692-12-0x0000000010000000-0x000000001003D000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/2692-15-0x0000000010000000-0x000000001003D000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

Custom signature

UPX dump on OEP (original entry point) 6 IoCs

resource	yara_rule
behavioral2/memory/4892-6-0x0000000000400000-0x000000000043A000-memory.dmp	UPX
behavioral2/files/0x000e00000001c545-7.dat	UPX
behavioral2/memory/2692-9-0x0000000010000000-0x000000001003D000-memory.dmp	UPX
behavioral2/memory/2692-10-0x0000000010000000-0x000000001003D000-memory.dmp	UPX
behavioral2/memory/2692-12-0x0000000010000000-0x000000001003D000-memory.dmp	UPX
behavioral2/memory/2692-15-0x0000000010000000-0x000000001003D000-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	2692	rundll32.exe
3	2692	rundll32.exe
4	2692	rundll32.exe
5	2692	rundll32.exe

Deletes itself 1 TTPs 1 IoCs

defense_evasion

File Deletion

T1070.004

pid	Process
4892	kzeck.exe

Executes dropped EXE 1 IoCs

pid	Process
4892	kzeck.exe

Loads dropped DLL 1 IoCs

pid	Process
2692	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-1-5-21-4057491610-3392471755-192832105-1000\Software\Microsoft\Windows\CurrentVersion\Run\EvtMgr = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\stlvg\\rcqpl.cpr\",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)	\??\n:	rundll32.exe
File opened (read-only)	\??\y:	rundll32.exe
File opened (read-only)	\??\g:	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)	\??\s:	rundll32.exe
File opened (read-only)	\??\a:	rundll32.exe
File opened (read-only)	\??\h:	rundll32.exe
File opened (read-only)	\??\l:	rundll32.exe
File opened (read-only)	\??\o:	rundll32.exe
File opened (read-only)	\??\t:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\w:	rundll32.exe
File opened (read-only)	\??\z:	rundll32.exe
File opened (read-only)	\??\d:	rundll32.exe
File opened (read-only)	\??\i:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\v:	rundll32.exe
File opened (read-only)	\??\x:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.exe
File opened (read-only)	\??\k:	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/0x000e00000001c545-7.dat	upx
behavioral2/memory/2692-9-0x0000000010000000-0x000000001003D000-memory.dmp	upx
behavioral2/memory/2692-10-0x0000000010000000-0x000000001003D000-memory.dmp	upx
behavioral2/memory/2692-12-0x0000000010000000-0x000000001003D000-memory.dmp	upx
behavioral2/memory/2692-15-0x0000000010000000-0x000000001003D000-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
4236	cmd.exe

Reads the TCP/IP host and domain name from the registry 1 TTPs 2 IoCs

The configured hostname and DNS domain identify the machine and are commonly collected to profile a host before it reports in.

discovery

System Network Configuration Discovery

T1016

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Hostname	rundll32.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Domain	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	kzeck.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-11-12_ae2ce4fa0af1331e9d0e4378dbb23777_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

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
4236	cmd.exe
2636	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
2636	PING.EXE

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
2692	rundll32.exe
2692	rundll32.exe
2692	rundll32.exe
2692	rundll32.exe
2692	rundll32.exe
2692	rundll32.exe
2692	rundll32.exe
2692	rundll32.exe
2692	rundll32.exe
2692	rundll32.exe
2692	rundll32.exe
2692	rundll32.exe
2692	rundll32.exe
2692	rundll32.exe
2692	rundll32.exe
2692	rundll32.exe
2692	rundll32.exe
2692	rundll32.exe
2692	rundll32.exe
2692	rundll32.exe
2692	rundll32.exe
2692	rundll32.exe
2692	rundll32.exe
2692	rundll32.exe
2692	rundll32.exe
2692	rundll32.exe
2692	rundll32.exe
2692	rundll32.exe
2692	rundll32.exe
2692	rundll32.exe
2692	rundll32.exe
2692	rundll32.exe
2692	rundll32.exe
2692	rundll32.exe
2692	rundll32.exe
2692	rundll32.exe
2692	rundll32.exe
2692	rundll32.exe
2692	rundll32.exe
2692	rundll32.exe
2692	rundll32.exe
2692	rundll32.exe
2692	rundll32.exe
2692	rundll32.exe
2692	rundll32.exe
2692	rundll32.exe
2692	rundll32.exe
2692	rundll32.exe
2692	rundll32.exe
2692	rundll32.exe
2692	rundll32.exe
2692	rundll32.exe
2692	rundll32.exe
2692	rundll32.exe
2692	rundll32.exe
2692	rundll32.exe
2692	rundll32.exe
2692	rundll32.exe
2692	rundll32.exe
2692	rundll32.exe
2692	rundll32.exe
2692	rundll32.exe
2692	rundll32.exe
2692	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2692	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
3436	2026-11-12_ae2ce4fa0af1331e9d0e4378dbb23777_elex_wannacry.exe
4892	kzeck.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 3436 wrote to memory of 4236	3436	2026-11-12_ae2ce4fa0af1331e9d0e4378dbb23777_elex_wannacry.exe	90
PID 4236 wrote to memory of 2636	4236	cmd.exe	92
PID 4236 wrote to memory of 4892	4236	cmd.exe	93
PID 4892 wrote to memory of 2692	4892	kzeck.exe	94

C:\Users\Admin\AppData\Local\Temp\2026-11-12_ae2ce4fa0af1331e9d0e4378dbb23777_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-11-12_ae2ce4fa0af1331e9d0e4378dbb23777_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3436
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\kzeck.exe "C:\Users\Admin\AppData\Local\Temp\2026-11-12_ae2ce4fa0af1331e9d0e4378dbb23777_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:4236
- - 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:2636
- - C:\Users\Admin\AppData\Local\Temp\kzeck.exe
    C:\Users\Admin\AppData\Local\Temp\\kzeck.exe "C:\Users\Admin\AppData\Local\Temp\2026-11-12_ae2ce4fa0af1331e9d0e4378dbb23777_elex_wannacry.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:4892
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\stlvg\rcqpl.cpr",RAFlush C:\Users\Admin\AppData\Local\Temp\kzeck.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)
      Reads the TCP/IP host and domain name from the registry
      System Location Discovery: System Language Discovery
      Checks processor information in registry
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:2692

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

Indicator Removal

T1070

File Deletion

T1070.004

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

kzeck.exe

Path C:\Users\Admin\AppData\Local\Temp\kzeck.exe
Size 272KB
SHA256 dde4a2924fda1631035b0ae55a66c4ebac4dcf2450ceeeadd9e01ff0779aac61
MD5 09adeafa61c6f94701938eb972d61a66
SHA1 363072da7161be2df165ff155633885cb8f4740b
SHA512 268c6ba7c2ed03d46b9ecb6c37f12f39dc45fa7b9a9abc8f58c6be5c337757ed9aadcd3e3a4851c32dcb41ee0a1f67dc95f9fd0949fb8a6da4896530946caac8
SSDEEP 6144:H8AbwMmJOyOK5ZV7NHPR519jtr5a8MueZG7Ho:PwVJOp8FNprdrMul7I
TLSH
T12754CE11F621C945E4724C3177AE59298764FC19EB4CB243E3F86B0FDC2EE92A93C256
MD5 SHA1 SHA512 SSDEEP TLSH

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rcqpl.cpr

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

Submit Download

memory/2692-9-0x0000000010000000-0x000000001003D000-memory.dmp

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memory/2692-10-0x0000000010000000-0x000000001003D000-memory.dmp

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memory/2692-12-0x0000000010000000-0x000000001003D000-memory.dmp

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memory/2692-15-0x0000000010000000-0x000000001003D000-memory.dmp

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memory/3436-0-0x0000000000400000-0x000000000043A000-memory.dmp

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memory/3436-2-0x0000000000400000-0x000000000043A000-memory.dmp

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memory/4892-6-0x0000000000400000-0x000000000043A000-memory.dmp

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