farfli | 58f21da6df2ea6c0e589daa58b4fdfe46d6aad47c015b1f81600408a76da2921

Analysis

max time kernel
149s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20260513-en
resource tags

arch:x64arch:x86image:win10v2004-20260513-enlocale:en-usos:windows10-2004-x64systemwindows
submitted
04/06/2026, 04:27

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General

Target
2026-06-04_93a74c61abac28bbe19781a0e3c610f8_elex_strictor_wannacry.exe
Size 274KB
Sample260604-e227laaz6k
SHA256 58f21da6df2ea6c0e589daa58b4fdfe46d6aad47c015b1f81600408a76da2921
MD5 93a74c61abac28bbe19781a0e3c610f8
SHA1 4c85133d8a098fc53a550401ecf8f39f6c2c68b4
SHA512 c57076d9a0a2cc3ac5185c00e7bae78a619867b0aeabf4589a3af042234b36d851d56cd71f5a42331258da0f5523760a47662c6bdf68013c9af526035c9bc163
SSDEEP 6144:Ol/AROcaxmlJaErfbMCurC7xS3ZMOBnskyGrOQ:URcCmuErglr73aADxj
TLSH
T13854F192E502DF07ED3FC7B6813E4E291217AF221B7055D7D6C1BC2D26B2682793A0D9
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 6 IoCs

resource	yara_rule
behavioral1/memory/2736-9-0x0000000010000000-0x0000000010058000-memory.dmp	family_farfli
behavioral1/memory/2736-11-0x0000000010000000-0x0000000010058000-memory.dmp	family_farfli
behavioral1/memory/2736-7-0x0000000010000000-0x0000000010058000-memory.dmp	family_farfli
behavioral1/memory/2736-14-0x0000000010000000-0x0000000010058000-memory.dmp	family_farfli
behavioral1/memory/2736-16-0x0000000010000000-0x0000000010058000-memory.dmp	family_farfli
behavioral1/memory/2736-18-0x0000000010000000-0x0000000010058000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 6 IoCs

resource	yara_rule
behavioral1/memory/2736-9-0x0000000010000000-0x0000000010058000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/2736-11-0x0000000010000000-0x0000000010058000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/2736-7-0x0000000010000000-0x0000000010058000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/2736-14-0x0000000010000000-0x0000000010058000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/2736-16-0x0000000010000000-0x0000000010058000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/2736-18-0x0000000010000000-0x0000000010058000-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
6	2736	rundll32.exe
35	2736	rundll32.exe
36	2736	rundll32.exe
37	2736	rundll32.exe
48	2736	rundll32.exe
54	2736	rundll32.exe
73	2736	rundll32.exe
80	2736	rundll32.exe

Deletes itself 1 IoCs

pid	Process
2468	oqhhy.exe

Executes dropped EXE 1 IoCs

pid	Process
2468	oqhhy.exe

Loads dropped DLL 1 IoCs

pid	Process
2736	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-1-5-21-668679576-120646659-2289335452-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Wetor = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\Program Files\\itbgy\\efafs.dll\",GetProc"	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)	\??\p:	rundll32.exe
File opened (read-only)	\??\g:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\r:	rundll32.exe
File opened (read-only)	\??\s:	rundll32.exe
File opened (read-only)	\??\t:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\n:	rundll32.exe
File opened (read-only)	\??\x:	rundll32.exe
File opened (read-only)	\??\y:	rundll32.exe
File opened (read-only)	\??\z:	rundll32.exe
File opened (read-only)	\??\a:	rundll32.exe
File opened (read-only)	\??\i:	rundll32.exe
File opened (read-only)	\??\o:	rundll32.exe
File opened (read-only)	\??\q:	rundll32.exe
File opened (read-only)	\??\v:	rundll32.exe
File opened (read-only)	\??\w:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.exe
File opened (read-only)	\??\e:	rundll32.exe
File opened (read-only)	\??\h:	rundll32.exe
File opened (read-only)	\??\k:	rundll32.exe
File opened (read-only)	\??\l:	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

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File opened for modification	\??\c:\Program Files\itbgy	oqhhy.exe
File created	\??\c:\Program Files\itbgy\efafs.dll	oqhhy.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	PING.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	oqhhy.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-06-04_93a74c61abac28bbe19781a0e3c610f8_elex_strictor_wannacry.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.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
2484	cmd.exe
3776	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
3776	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2736	rundll32.exe
2736	rundll32.exe
2736	rundll32.exe
2736	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2736	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2528	2026-06-04_93a74c61abac28bbe19781a0e3c610f8_elex_strictor_wannacry.exe
2468	oqhhy.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2528 wrote to memory of 2484	2528	2026-06-04_93a74c61abac28bbe19781a0e3c610f8_elex_strictor_wannacry.exe	90
PID 2484 wrote to memory of 3776	2484	cmd.exe	92
PID 2484 wrote to memory of 2468	2484	cmd.exe	94
PID 2468 wrote to memory of 2736	2468	oqhhy.exe	95

C:\Users\Admin\AppData\Local\Temp\2026-06-04_93a74c61abac28bbe19781a0e3c610f8_elex_strictor_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-06-04_93a74c61abac28bbe19781a0e3c610f8_elex_strictor_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2528
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\oqhhy.exe "C:\Users\Admin\AppData\Local\Temp\2026-06-04_93a74c61abac28bbe19781a0e3c610f8_elex_strictor_wannacry.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:2484
- - 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:3776
- - C:\Users\Admin\AppData\Local\Temp\oqhhy.exe
    C:\Users\Admin\AppData\Local\Temp\\oqhhy.exe "C:\Users\Admin\AppData\Local\Temp\2026-06-04_93a74c61abac28bbe19781a0e3c610f8_elex_strictor_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:2468
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\Program Files\itbgy\efafs.dll",GetProc C:\Users\Admin\AppData\Local\Temp\oqhhy.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:2736

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

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Downloads

oqhhy.exe

Path C:\Users\Admin\AppData\Local\Temp\oqhhy.exe
Size 275KB
SHA256 7681296d2b88be5d532ebe21a4f33109755c276838d05af323e3525bb93eab60
MD5 882a46afa7fc73186d6e3dafc51b1fdf
SHA1 0f44c20a76ebea50cae2c3dfdf19678d67f44076
SHA512 fa53e9e72e8226b0927684152977039de140391f7550b0128ea9f64ebf9a1b2ea10fc0d8aebc8ee9c3aa05129cbf89c179e96c71011b8fbcabc3a4f5fc7cdf5d
SSDEEP 6144:Ol/AROcaxmlJaErfbMCurC7xS3ZMOBnskyGrO+:URcCmuErglr73aADxr
TLSH
T1AD54F292E502DF07ED3FC7B6813E4E291217AF221B7055D7D6C1BC2E26B2682753A0D9
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

efafs.dll

Path \??\c:\Program Files\itbgy\efafs.dll
Size 218KB
SHA256 afceb765568187f475368364e21d104fe79a270b2f13bea5cebe935803e3a7c3
MD5 0876f4eafb9d9e6aed8dfcafc8f16161
SHA1 421c0d0b51f0c1e9be9883ff32d03c83de8a7039
SHA512 93532e7fc5a813d5f43a03c7721992909a3bda267f4af42a62a79a5459cbda85151101680d8e70f9636e50fec693a9dc4e837e72a12f0cb7361f2443400575ad
SSDEEP 6144:KORxNwD2VOidhzeXwddDzLi5vOQEqscr0ZTJauytC:pnNwDTi3swddDiROXIs
TLSH
T11924128BCF983873C5223379597951A0B9325290AFA1534D93E6D34FA072BA2CF7B531
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/2736-8-0x0000000000870000-0x0000000000871000-memory.dmp

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memory/2736-9-0x0000000010000000-0x0000000010058000-memory.dmp

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memory/2736-11-0x0000000010000000-0x0000000010058000-memory.dmp

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memory/2736-7-0x0000000010000000-0x0000000010058000-memory.dmp

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memory/2736-13-0x0000000000870000-0x0000000000871000-memory.dmp

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memory/2736-14-0x0000000010000000-0x0000000010058000-memory.dmp

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memory/2736-16-0x0000000010000000-0x0000000010058000-memory.dmp

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memory/2736-18-0x0000000010000000-0x0000000010058000-memory.dmp

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