farfli | 7628359374bc66bbf0679fcd9819353c52dce2849426349ff0b32dd6354f621e

Analysis

max time kernel
149s
max time network
155s
platform
windows11-21h2_x64
resource
win11-20260513-en
resource tags

arch:x64arch:x86image:win11-20260513-enlocale:en-usos:windows11-21h2-x64systemwindows
submitted
03/06/2026, 22:26

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General

Target
2026-06-03_46836387b8c177ad5295ae42d69d21fe_elex_wannacry.exe
Size 437KB
Sample260603-2cmryaez41
SHA256 7628359374bc66bbf0679fcd9819353c52dce2849426349ff0b32dd6354f621e
MD5 46836387b8c177ad5295ae42d69d21fe
SHA1 bff21f906aa8b35e938ec733e7e80bdd0ae73930
SHA512 6420266c7eb447b75c1cd70eafa339de74c17e726339d888a44ae23ec83b41ae79c6b67125dfeb06c568eb842ff42e1e2b22a22aac00dff2090b90d7bdc746f8
SSDEEP 6144:BAzMDuL6wVQ+jex2envjZMqLNC95Cw8PEPHV0eXW:W5HjS2KlfLNo5CwKc2
TLSH
T1DB94A35163F94608F6F77F7CAA792E7C4A76FC9EED38C65C0252404F59B1A5088A0B23
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 2 IoCs

resource	yara_rule
behavioral2/memory/2836-12-0x0000000010000000-0x0000000010065000-memory.dmp	family_farfli
behavioral2/memory/2836-14-0x0000000010000000-0x0000000010065000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 2 IoCs

resource	yara_rule
behavioral2/memory/2836-12-0x0000000010000000-0x0000000010065000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/2836-14-0x0000000010000000-0x0000000010065000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

Badlisted process makes network request 15 IoCs

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

flow	pid	Process
1	2836	rundll32.exe
2	2836	rundll32.exe
3	2836	rundll32.exe
4	2836	rundll32.exe
5	2836	rundll32.exe
6	2836	rundll32.exe
7	2836	rundll32.exe
8	2836	rundll32.exe
9	2836	rundll32.exe
10	2836	rundll32.exe
11	2836	rundll32.exe
14	2836	rundll32.exe
15	2836	rundll32.exe
16	2836	rundll32.exe
17	2836	rundll32.exe

Deletes itself 1 IoCs

pid	Process
4616	avsmbugw.exe

Executes dropped EXE 1 IoCs

pid	Process
4616	avsmbugw.exe

Loads dropped DLL 1 IoCs

pid	Process
2836	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-1-5-21-2654269261-3199571979-4291878722-1000\Software\Microsoft\Windows\CurrentVersion\Run\Axpol = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\Program Files\\wdwesdm\\rpgrx.dll\",ZipCompress"	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)	\??\m:	rundll32.exe
File opened (read-only)	\??\w:	rundll32.exe
File opened (read-only)	\??\y:	rundll32.exe
File opened (read-only)	\??\i:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\a:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.exe
File opened (read-only)	\??\l:	rundll32.exe
File opened (read-only)	\??\q:	rundll32.exe
File opened (read-only)	\??\t:	rundll32.exe
File opened (read-only)	\??\x:	rundll32.exe
File opened (read-only)	\??\z:	rundll32.exe
File opened (read-only)	\??\g:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\n:	rundll32.exe
File opened (read-only)	\??\o:	rundll32.exe
File opened (read-only)	\??\p:	rundll32.exe
File opened (read-only)	\??\r:	rundll32.exe
File opened (read-only)	\??\s:	rundll32.exe
File opened (read-only)	\??\v:	rundll32.exe
File opened (read-only)	\??\e:	rundll32.exe
File opened (read-only)	\??\h:	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

Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs

pid	Process
2836	rundll32.exe

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File opened for modification	\??\c:\Program Files\wdwesdm	avsmbugw.exe
File created	\??\c:\Program Files\wdwesdm\rpgrx.dll	avsmbugw.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	2026-06-03_46836387b8c177ad5295ae42d69d21fe_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	avsmbugw.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
2324	PING.EXE
1092	cmd.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
2324	PING.EXE

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
2836	rundll32.exe
2836	rundll32.exe
2836	rundll32.exe
2836	rundll32.exe
2836	rundll32.exe
2836	rundll32.exe
2836	rundll32.exe
2836	rundll32.exe
2836	rundll32.exe
2836	rundll32.exe
2836	rundll32.exe
2836	rundll32.exe
2836	rundll32.exe
2836	rundll32.exe
2836	rundll32.exe
2836	rundll32.exe
2836	rundll32.exe
2836	rundll32.exe
2836	rundll32.exe
2836	rundll32.exe
2836	rundll32.exe
2836	rundll32.exe
2836	rundll32.exe
2836	rundll32.exe
2836	rundll32.exe
2836	rundll32.exe
2836	rundll32.exe
2836	rundll32.exe
2836	rundll32.exe
2836	rundll32.exe
2836	rundll32.exe
2836	rundll32.exe
2836	rundll32.exe
2836	rundll32.exe
2836	rundll32.exe
2836	rundll32.exe
2836	rundll32.exe
2836	rundll32.exe
2836	rundll32.exe
2836	rundll32.exe
2836	rundll32.exe
2836	rundll32.exe
2836	rundll32.exe
2836	rundll32.exe
2836	rundll32.exe
2836	rundll32.exe
2836	rundll32.exe
2836	rundll32.exe
2836	rundll32.exe
2836	rundll32.exe
2836	rundll32.exe
2836	rundll32.exe
2836	rundll32.exe
2836	rundll32.exe
2836	rundll32.exe
2836	rundll32.exe
2836	rundll32.exe
2836	rundll32.exe
2836	rundll32.exe
2836	rundll32.exe
2836	rundll32.exe
2836	rundll32.exe
2836	rundll32.exe
2836	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2836	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
1820	2026-06-03_46836387b8c177ad5295ae42d69d21fe_elex_wannacry.exe
4616	avsmbugw.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1820 wrote to memory of 1092	1820	2026-06-03_46836387b8c177ad5295ae42d69d21fe_elex_wannacry.exe	81
PID 1092 wrote to memory of 2324	1092	cmd.exe	83
PID 1092 wrote to memory of 4616	1092	cmd.exe	84
PID 4616 wrote to memory of 2836	4616	avsmbugw.exe	85

C:\Users\Admin\AppData\Local\Temp\2026-06-03_46836387b8c177ad5295ae42d69d21fe_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-06-03_46836387b8c177ad5295ae42d69d21fe_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1820
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\avsmbugw.exe "C:\Users\Admin\AppData\Local\Temp\2026-06-03_46836387b8c177ad5295ae42d69d21fe_elex_wannacry.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:1092
- - 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:2324
- - C:\Users\Admin\AppData\Local\Temp\avsmbugw.exe
    C:\Users\Admin\AppData\Local\Temp\\avsmbugw.exe "C:\Users\Admin\AppData\Local\Temp\2026-06-03_46836387b8c177ad5295ae42d69d21fe_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:4616
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\Program Files\wdwesdm\rpgrx.dll",ZipCompress C:\Users\Admin\AppData\Local\Temp\avsmbugw.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)
      Suspicious use of NtSetInformationThreadHideFromDebugger
      System Location Discovery: System Language Discovery
      Checks processor information in registry
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:2836

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

Replay Monitor

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Downloads

rpgrx.dll

Path C:\Program Files\wdwesdm\rpgrx.dll
Size 180KB
SHA256 c83de7466edbb1cea459a14d3c92c30b8ad1a81a827085f3eb6633d387f9c740
MD5 daf8216709ad692d24aceb02e3a4e588
SHA1 e74628f6c893fff0edd9de711ca1d34b92ce8ad1
SHA512 317619c5206a99b88738e81d98666c3cc4dde86256ba0552fb1a5bafeb119da6b09a0ade9138c6bbb6a4115de26e19e03fc94d677ac6f5982634cfb5d5639700
SSDEEP 3072:R/q9D8TGRg+2P0XSE0+7GHms91/Eg+lJKkarUTKeaVa/+UJCmwEgC5Vi8tvuGS:I8CgNPISQXsj/MlmYHOa/BJlwEgC5ViX
TLSH
T1590402C1AD0753B3D59743734D26989CFF341A602A7ACF29F209EAA6E42111797BF132
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

avsmbugw.exe

Path C:\Users\Admin\AppData\Local\Temp\avsmbugw.exe
Size 437KB
SHA256 cfd5ea7da740a564648eab2a691b7de9c0888cd1d320e38c9b6e65aee6ad2a85
MD5 61e555f71907db45ba5915f092616827
SHA1 a6a7754a0ae605bbf018148154c827ed012262c2
SHA512 35bf129fab81668a246963477d404d669cd9815f7cf3ec4681d5ece1d824d5c717cfb269f670687e99967066d9e1a2ecfb1158d38c32cf230622f18bb0c7c501
SSDEEP 6144:BAzMDuL6wVQ+jex2envjZMqLNC95Cw8PEPHV0eXx:W5HjS2KlfLNo5CwKcR
TLSH
T14394A35163F94608F6F77F7CAA792E7C4A76FC9EED38C65C0252404F59B1A5088A0B23
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/1820-0-0x0000000000400000-0x000000000046D000-memory.dmp

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memory/1820-2-0x0000000000400000-0x000000000046D000-memory.dmp

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memory/2836-11-0x000000001004A000-0x000000001004B000-memory.dmp

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memory/2836-12-0x0000000010000000-0x0000000010065000-memory.dmp

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memory/2836-10-0x0000000010000000-0x0000000010065000-memory.dmp

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memory/2836-14-0x0000000010000000-0x0000000010065000-memory.dmp

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memory/4616-7-0x0000000000400000-0x000000000046D000-memory.dmp

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