farfli | 012ca7e3342e0e1f850a49e572b98b6603c1fe009fac5f854aa658c7bf365e64

Analysis

max time kernel
148s
max time network
137s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260911-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260911-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
22/10/2026, 19:11

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General

Target
2026-10-21_841ec70828c23536507fbaa088917f32_elex_wannacry.exe
Size 400KB
Sample261022-xv2llahv2q
SHA256 012ca7e3342e0e1f850a49e572b98b6603c1fe009fac5f854aa658c7bf365e64
MD5 841ec70828c23536507fbaa088917f32
SHA1 ea24d9d288d828ed6a09f6bb30b05e7e8097427c
SHA512 af9edccab99912e060f47e39b3a07b40d6bd5ab2d365e14035810f7dbc7d61ff5ad117f39407da7fdb45d818770a9c4ebbe8f416cde18d40b686713ca3c4b019
SSDEEP 6144:JtecHBTSpjVfs3mCL17O/cvARZZWcStoWwABr8iXpXxr2kDQH/9:nHBTwjBqbYkvqZMcV7i32ie
TLSH
T1F894CF2332C1C8B7C1D17373FEE2AA72E3F5C2A85D356A7753EA015D1E2744C92162A9
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 5 IoCs

resource	yara_rule
behavioral2/memory/4848-10-0x0000000010000000-0x000000001005A000-memory.dmp	family_farfli
behavioral2/memory/4848-14-0x0000000010000000-0x000000001005A000-memory.dmp	family_farfli
behavioral2/memory/4848-16-0x0000000010000000-0x000000001005A000-memory.dmp	family_farfli
behavioral2/memory/4848-18-0x0000000010000000-0x000000001005A000-memory.dmp	family_farfli
behavioral2/memory/4848-20-0x0000000010000000-0x000000001005A000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 5 IoCs

resource	yara_rule
behavioral2/memory/4848-10-0x0000000010000000-0x000000001005A000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/4848-14-0x0000000010000000-0x000000001005A000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/4848-16-0x0000000010000000-0x000000001005A000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/4848-18-0x0000000010000000-0x000000001005A000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/4848-20-0x0000000010000000-0x000000001005A000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

Deletes itself 1 TTPs 1 IoCs

defense_evasion

File Deletion

T1070.004

pid	Process
4744	mznwi.exe

Executes dropped EXE 2 IoCs

pid	Process
4744	mznwi.exe
4848	uoolin.exe

Loads dropped DLL 1 IoCs

pid	Process
4848	uoolin.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-1-5-21-650287814-2715975232-1279715623-1000\Software\Microsoft\Windows\CurrentVersion\Run\DESIME = "c:\\Program Files\\dafme\\uoolin.exe \"c:\\Program Files\\dafme\\uoolin.dll\",DoPrivacy"	uoolin.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)	\??\b:	uoolin.exe
File opened (read-only)	\??\g:	uoolin.exe
File opened (read-only)	\??\j:	uoolin.exe
File opened (read-only)	\??\l:	uoolin.exe
File opened (read-only)	\??\o:	uoolin.exe
File opened (read-only)	\??\p:	uoolin.exe
File opened (read-only)	\??\u:	uoolin.exe
File opened (read-only)	\??\w:	uoolin.exe
File opened (read-only)	\??\a:	uoolin.exe
File opened (read-only)	\??\k:	uoolin.exe
File opened (read-only)	\??\n:	uoolin.exe
File opened (read-only)	\??\q:	uoolin.exe
File opened (read-only)	\??\r:	uoolin.exe
File opened (read-only)	\??\s:	uoolin.exe
File opened (read-only)	\??\t:	uoolin.exe
File opened (read-only)	\??\x:	uoolin.exe
File opened (read-only)	\??\d:	uoolin.exe
File opened (read-only)	\??\h:	uoolin.exe
File opened (read-only)	\??\v:	uoolin.exe
File opened (read-only)	\??\y:	uoolin.exe
File opened (read-only)	\??\i:	uoolin.exe
File opened (read-only)	\??\m:	uoolin.exe
File opened (read-only)	\??\z:	uoolin.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	uoolin.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4452-0-0x0000000000400000-0x0000000000499000-memory.dmp	upx
behavioral2/memory/4452-2-0x0000000000400000-0x0000000000499000-memory.dmp	upx
behavioral2/files/0x000600000001b867-3.dat	upx
behavioral2/memory/4744-7-0x0000000000400000-0x0000000000499000-memory.dmp	upx

Drops file in Program Files directory 3 IoCs

description	ioc	Process
File opened for modification	\??\c:\Program Files\dafme	mznwi.exe
File created	\??\c:\Program Files\dafme\uoolin.dll	mznwi.exe
File created	\??\c:\Program Files\dafme\uoolin.exe	mznwi.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
4232	cmd.exe

Reads the TCP/IP host and domain name from the registry 1 TTPs 1 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	uoolin.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	2026-10-21_841ec70828c23536507fbaa088917f32_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	mznwi.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	uoolin.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
4232	cmd.exe
1976	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	uoolin.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	uoolin.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
1976	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
4848	uoolin.exe
4848	uoolin.exe
4848	uoolin.exe
4848	uoolin.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4848	uoolin.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
4452	2026-10-21_841ec70828c23536507fbaa088917f32_elex_wannacry.exe
4744	mznwi.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 4452 wrote to memory of 4232	4452	2026-10-21_841ec70828c23536507fbaa088917f32_elex_wannacry.exe	89
PID 4232 wrote to memory of 1976	4232	cmd.exe	91
PID 4232 wrote to memory of 4744	4232	cmd.exe	92
PID 4744 wrote to memory of 4848	4744	mznwi.exe	93

C:\Users\Admin\AppData\Local\Temp\2026-10-21_841ec70828c23536507fbaa088917f32_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-10-21_841ec70828c23536507fbaa088917f32_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4452
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\mznwi.exe "C:\Users\Admin\AppData\Local\Temp\2026-10-21_841ec70828c23536507fbaa088917f32_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:4232
- - 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:1976
- - C:\Users\Admin\AppData\Local\Temp\mznwi.exe
    C:\Users\Admin\AppData\Local\Temp\\mznwi.exe "C:\Users\Admin\AppData\Local\Temp\2026-10-21_841ec70828c23536507fbaa088917f32_elex_wannacry.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - Drops file in Program Files directory
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:4744
  - - \??\c:\Program Files\dafme\uoolin.exe
      "c:\Program Files\dafme\uoolin.exe" "c:\Program Files\dafme\uoolin.dll",DoPrivacy C:\Users\Admin\AppData\Local\Temp\mznwi.exe
      4⤵
      Executes dropped EXE
      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:4848

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

uoolin.exe

Path C:\Program Files\dafme\uoolin.exe
Size 51KB
SHA256 ce6bb7eddc83762c708d4a41709ae00371dbdc09b2a380f28fa60b1edf917473
MD5 2e068ce2770fde8d1af4cb114b98df1f
SHA1 b6f9c2775babb025b22f915c3047aa627d07c312
SHA512 998d695eb56375e63df7db16740b89deb2cf630ccbead8bcf84a921ec6f4a4f9aef2755b703f7190f332b2008ebcc949363bcf8f392d7d07246c255b5073ed35
SSDEEP 1536:6G9yoVEpHP29I3fbcJboSUge5N+CnC/maz9Rh:8pv2mbcJboce58wvOR
TLSH
T137336C236A0A49B3DFE231780A9D7232526DD862075541F7A61057EAFD243E2EE743CF
MD5 SHA1 SHA512 SSDEEP TLSH

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mznwi.exe

Path C:\Users\Admin\AppData\Local\Temp\mznwi.exe
Size 400KB
SHA256 33bee535d1d78dab7f932c633b9917887201290d81f146594acd4c4ac7c694bc
MD5 29a0c8b1375db8da2d2b33c6d4117ee6
SHA1 0f6908090a37878d6e5101a49c845e170b09bef2
SHA512 4a79b5d8e16891147d4e3627ecaa64c2ac712944551c68c2c0e2bfbbee27078c001592f5f88001f69c51ed45906291485cd326897b2ccaa0c0112754de0a88f6
SSDEEP 6144:JtecHBTSpjVfs3mCL17O/cvARZZWcStoWwABr8iXpXxr2kDQH/9:nHBTwjBqbYkvqZMcV7i32ie
TLSH
T1DD94CF2332C1C8B7C1D17373FEE2AA72E3F5C2A85D356A7753EA015D1E2744C92162A9
MD5 SHA1 SHA512 SSDEEP TLSH

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uoolin.dll

Path \??\c:\Program Files\dafme\uoolin.dll
Size 219KB
SHA256 4d80e3a2f1854fdf49e72551d4a4615714abafffe51ca143c2917c1070cdef63
MD5 2cac4b063708e84d2a7a937bdf1354c8
SHA1 65242a2d0666e2abdf5be6582550e15ab36b8484
SHA512 7428a3c280e4e29f0aa4077b08f9357b1c0e35d4bd839e77c175618a67585cc676f9b65f7857d6b9a6ab71fbc985222ef7138b3b12b86d42fc55bca70af1e574
SSDEEP 6144:XxDink0qeQKc/A8MNfnX2p2KL5aI3iMKf:XAk9uNfnX2p2Q5aIx+
TLSH
T1B72413D4FF52EECEE8610AF03B4FA265DF705C6BC48202C114EE58535A65EA3F696701
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/4452-0-0x0000000000400000-0x0000000000499000-memory.dmp

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memory/4452-2-0x0000000000400000-0x0000000000499000-memory.dmp

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memory/4744-7-0x0000000000400000-0x0000000000499000-memory.dmp

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memory/4848-15-0x0000000002810000-0x0000000002811000-memory.dmp

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memory/4848-10-0x0000000010000000-0x000000001005A000-memory.dmp

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memory/4848-14-0x0000000010000000-0x000000001005A000-memory.dmp

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memory/4848-16-0x0000000010000000-0x000000001005A000-memory.dmp

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memory/4848-18-0x0000000010000000-0x000000001005A000-memory.dmp

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memory/4848-20-0x0000000010000000-0x000000001005A000-memory.dmp

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