farfli | 59df21d5850aff8d08c61045ec1c33e16d77994e8781da10d5b523703dae0b0b

Analysis

max time kernel
148s
max time network
147s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260709-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
31/07/2026, 14:19

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General

Target
2026-07-31_705f3c2c0fe91adf3448dd73dca06ef1_elex_wannacry.exe
Size 101KB
Sample260731-rmyl3svblg
SHA256 59df21d5850aff8d08c61045ec1c33e16d77994e8781da10d5b523703dae0b0b
MD5 705f3c2c0fe91adf3448dd73dca06ef1
SHA1 3ac66a6c6dc811b049ed95a8267e0157826cfada
SHA512 c99350b5629866f8ba44aae0d58b72ab6468f1383c75b20725120afd96f34e37f7dca33edbcdf56d418914f2b52348eceb95fdb709ee7b443ec7fd1d7ba9141b
SSDEEP 1536:8gDktLw4rO10tMrlk3SJDlf98jqP+8il3CxOeZIckWlmy+:uLRrO10TiJD9yjqrilyxOuP+
TLSH
T12CA37C1D6962C59EE4015F74430B962097A2AC19FA304F335384BB4EFF36E1BEDA91D8
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 4 IoCs

resource	yara_rule
behavioral2/memory/4964-9-0x0000000010000000-0x0000000010023000-memory.dmp	family_farfli
behavioral2/memory/4964-11-0x0000000010000000-0x0000000010023000-memory.dmp	family_farfli
behavioral2/memory/4964-13-0x0000000010000000-0x0000000010023000-memory.dmp	family_farfli
behavioral2/memory/4964-14-0x0000000010000000-0x0000000010023000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 4 IoCs

resource	yara_rule
behavioral2/memory/4964-9-0x0000000010000000-0x0000000010023000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/4964-11-0x0000000010000000-0x0000000010023000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/4964-13-0x0000000010000000-0x0000000010023000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/4964-14-0x0000000010000000-0x0000000010023000-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
5	4964	rundll32.exe
6	4964	rundll32.exe
7	4964	rundll32.exe
12	4964	rundll32.exe
13	4964	rundll32.exe
14	4964	rundll32.exe
16	4964	rundll32.exe
17	4964	rundll32.exe

Deletes itself 1 IoCs

pid	Process
6120	ixuceppte.exe

Executes dropped EXE 1 IoCs

pid	Process
6120	ixuceppte.exe

Loads dropped DLL 1 IoCs

pid	Process
4964	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-1-5-21-552508041-2681165170-3229858294-1000\Software\Microsoft\Windows\CurrentVersion\Run\EvtMgr = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\uyjxs\\mvmzb.dll\",QueryPluginInterface"	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)	\??\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)	\??\s:	rundll32.exe
File opened (read-only)	\??\t:	rundll32.exe
File opened (read-only)	\??\z:	rundll32.exe
File opened (read-only)	\??\a:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\k:	rundll32.exe
File opened (read-only)	\??\q:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.exe
File opened (read-only)	\??\l:	rundll32.exe
File opened (read-only)	\??\p:	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)	\??\y:	rundll32.exe
File opened (read-only)	\??\d:	rundll32.exe
File opened (read-only)	\??\g:	rundll32.exe
File opened (read-only)	\??\r:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\h:	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
4076	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	2026-07-31_705f3c2c0fe91adf3448dd73dca06ef1_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	ixuceppte.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
4076	cmd.exe
5524	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
5524	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
4964	rundll32.exe
4964	rundll32.exe
4964	rundll32.exe
4964	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4964	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
4084	2026-07-31_705f3c2c0fe91adf3448dd73dca06ef1_elex_wannacry.exe
6120	ixuceppte.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 4084 wrote to memory of 4076	4084	2026-07-31_705f3c2c0fe91adf3448dd73dca06ef1_elex_wannacry.exe	89
PID 4076 wrote to memory of 5524	4076	cmd.exe	91
PID 4076 wrote to memory of 6120	4076	cmd.exe	92
PID 6120 wrote to memory of 4964	6120	ixuceppte.exe	93

C:\Users\Admin\AppData\Local\Temp\2026-07-31_705f3c2c0fe91adf3448dd73dca06ef1_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-07-31_705f3c2c0fe91adf3448dd73dca06ef1_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4084
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\ixuceppte.exe "C:\Users\Admin\AppData\Local\Temp\2026-07-31_705f3c2c0fe91adf3448dd73dca06ef1_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:4076
- - 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:5524
- - C:\Users\Admin\AppData\Local\Temp\ixuceppte.exe
    C:\Users\Admin\AppData\Local\Temp\\ixuceppte.exe "C:\Users\Admin\AppData\Local\Temp\2026-07-31_705f3c2c0fe91adf3448dd73dca06ef1_elex_wannacry.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:6120
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\uyjxs\mvmzb.dll",QueryPluginInterface C:\Users\Admin\AppData\Local\Temp\ixuceppte.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:4964

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

ixuceppte.exe

Path C:\Users\Admin\AppData\Local\Temp\ixuceppte.exe
Size 102KB
SHA256 ee6a037d7ab8d6d3c8b759e2b249985e2532e473894cc618ceff7b64407a2e51
MD5 6d6c653a2196e08e527b02d6ad0da83f
SHA1 22b58bbc553bfc800d2f1727a5c1466566e5d91a
SHA512 02cee528a42a0d9e882f02794e116abfb87366e51830a7c4c82ce7a8c97e5eed39d09bc1612f343cc6d93e575a28b84573b08409d214c9428d0323c34984365c
SSDEEP 1536:8gDktLw4rO10tMrlk3SJDlf98jqP+8il3CxOeZIckWlmyP:uLRrO10TiJD9yjqrilyxOuPP
TLSH
T109A37C1C6962C59EE4015F74430B962097A2AC19FA304F335384BB4EFF36E1BEDA91D8
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

mvmzb.dll

Path \??\c:\uyjxs\mvmzb.dll
Size 44KB
SHA256 9111c1eb1f0b59dcd49cfd5a0abc0ba100ac59a3bcae8623ff091dfdc46fed3c
MD5 0f12a7d509b2c9bb9b4cd6d8a0325e86
SHA1 f5fb59ad4f0633d115b06f35a2dc161dc4367157
SHA512 e3c84a643ff0a2627daba8a056221985a472aaf07bade61b3e9459db4bfc8792c1347606911e3fcc01581508004b18b5435bcccd5e7617cc6d091f37a5f42e7f
SSDEEP 768:DICzePjle2367kjhrXLdCuYMW8QVnwrLDGe/brbtJyOTuXfADVjeJ2i/MVJWAE:DDePjA23Ukjh37YMonwrvGybrbbRCf4E
TLSH
T1FD23F1A7B94E8D4FC0AE41F7078FC8D422B5589A97A7CB4626008F216CC4FB07E52376
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/4084-0-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/4084-2-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/4964-9-0x0000000010000000-0x0000000010023000-memory.dmp

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memory/4964-10-0x00000000025A0000-0x00000000025A2000-memory.dmp

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memory/4964-11-0x0000000010000000-0x0000000010023000-memory.dmp

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memory/4964-13-0x0000000010000000-0x0000000010023000-memory.dmp

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memory/4964-14-0x0000000010000000-0x0000000010023000-memory.dmp

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memory/6120-6-0x0000000000400000-0x0000000000417000-memory.dmp

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