farfli | 9980b21484cfba8d42487c7d7ce1eae72ef9167ff064942537db6c52f7ec3882

Analysis

max time kernel
148s
max time network
143s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260911-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260911-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
11/11/2026, 22:48

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General

Target
2026-11-10_b1eea65de7c1e01e2001836b79cdfb2a_elex_wannacry.exe
Size 391KB
Sample261111-2q4ydacd89
SHA256 9980b21484cfba8d42487c7d7ce1eae72ef9167ff064942537db6c52f7ec3882
MD5 b1eea65de7c1e01e2001836b79cdfb2a
SHA1 d14874ac5c3a3030e0448fa18ac87595af7d3622
SHA512 95f507c5429bb255f715da9a3ef4790aa2b2e94bfb36d119bd8bc00d93b18e09bd5ddd04f3370a4e189b97f6428aa1b1445a5049e13aa136f9167ceaa60725f4
SSDEEP 6144:54yA9i7ZanCjRDWqCEdK40LUT4AxFa7abls3oO:i7i1TjRDdZdVT4AxFauba3x
TLSH
T1CA847AC057F9C205F2BE2F75DAB976F04A29BD55EE34E64B12843C1DB870A91D870326
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

backdoor bootkit defense_evasion discovery execution 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/6048-11-0x0000000010000000-0x0000000010054000-memory.dmp	family_farfli
behavioral2/memory/6048-13-0x0000000010000000-0x0000000010054000-memory.dmp	family_farfli

Custom signature

Detects executables containing base64 encoded User Agent 2 IoCs

resource	yara_rule
behavioral2/memory/6048-11-0x0000000010000000-0x0000000010054000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/6048-13-0x0000000010000000-0x0000000010054000-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
7	6048	rundll32.exe
9	6048	rundll32.exe
10	6048	rundll32.exe
11	6048	rundll32.exe
12	6048	rundll32.exe
13	6048	rundll32.exe
16	6048	rundll32.exe
17	6048	rundll32.exe

Deletes itself 1 TTPs 1 IoCs

defense_evasion

File Deletion

T1070.004

pid	Process
4800	bnqagrbbk.exe

Executes dropped EXE 1 IoCs

pid	Process
4800	bnqagrbbk.exe

Loads dropped DLL 1 IoCs

pid	Process
6048	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-1-5-21-4280978039-528710165-233981602-1000\Software\Microsoft\Windows\CurrentVersion\Run\HDTunePro = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\Program Files\\asimpu\\fibkm.dll\",GetCpu"	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)	\??\h:	rundll32.exe
File opened (read-only)	\??\k:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\o:	rundll32.exe
File opened (read-only)	\??\q:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\y:	rundll32.exe
File opened (read-only)	\??\a:	rundll32.exe
File opened (read-only)	\??\g:	rundll32.exe
File opened (read-only)	\??\l:	rundll32.exe
File opened (read-only)	\??\p:	rundll32.exe
File opened (read-only)	\??\s:	rundll32.exe
File opened (read-only)	\??\v:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\w:	rundll32.exe
File opened (read-only)	\??\x:	rundll32.exe
File opened (read-only)	\??\i:	rundll32.exe
File opened (read-only)	\??\n:	rundll32.exe
File opened (read-only)	\??\r:	rundll32.exe
File opened (read-only)	\??\t:	rundll32.exe
File opened (read-only)	\??\z:	rundll32.exe
File opened (read-only)	\??\d:	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\asimpu	bnqagrbbk.exe
File created	\??\c:\Program Files\asimpu\fibkm.dll	bnqagrbbk.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
4576	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	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	2026-11-10_b1eea65de7c1e01e2001836b79cdfb2a_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	bnqagrbbk.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
4576	cmd.exe
4072	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
4072	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
6048	rundll32.exe
6048	rundll32.exe
6048	rundll32.exe
6048	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	6048	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
5032	2026-11-10_b1eea65de7c1e01e2001836b79cdfb2a_elex_wannacry.exe
4800	bnqagrbbk.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 5032 wrote to memory of 4576	5032	2026-11-10_b1eea65de7c1e01e2001836b79cdfb2a_elex_wannacry.exe	89
PID 4576 wrote to memory of 4072	4576	cmd.exe	91
PID 4576 wrote to memory of 4800	4576	cmd.exe	92
PID 4800 wrote to memory of 6048	4800	bnqagrbbk.exe	93

C:\Users\Admin\AppData\Local\Temp\2026-11-10_b1eea65de7c1e01e2001836b79cdfb2a_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-11-10_b1eea65de7c1e01e2001836b79cdfb2a_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:5032
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\bnqagrbbk.exe "C:\Users\Admin\AppData\Local\Temp\2026-11-10_b1eea65de7c1e01e2001836b79cdfb2a_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:4576
- - 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:4072
- - C:\Users\Admin\AppData\Local\Temp\bnqagrbbk.exe
    C:\Users\Admin\AppData\Local\Temp\\bnqagrbbk.exe "C:\Users\Admin\AppData\Local\Temp\2026-11-10_b1eea65de7c1e01e2001836b79cdfb2a_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:4800
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\Program Files\asimpu\fibkm.dll",GetCpu C:\Users\Admin\AppData\Local\Temp\bnqagrbbk.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:6048

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

bnqagrbbk.exe

Path C:\Users\Admin\AppData\Local\Temp\bnqagrbbk.exe
Size 391KB
SHA256 6e779157ebadd7322048544c9424ad6b9dbc77db91bb5fac8ba806f263a99926
MD5 06d974755d2ff930519bea75bb43a2d7
SHA1 1735b479fdf6d51bc5460659d24586a8c6b112d6
SHA512 527ee5c021620a64ef272240a12f4cc7c60a3504dd17cade6595e795ac7b4f9d840d7c84d6166ffcfc768ac443e191f18b21b5c6b1c72c3d2b5088fd992a88eb
SSDEEP 6144:54yA9i7ZanCjRDWqCEdK40LUT4AxFa7abls3oM:i7i1TjRDdZdVT4AxFauba3l
TLSH
T1E0847AC057F9C205F2BE2F75DAB9B6F04A29BD55EE34E64B12843C1DB870A91D870326
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

fibkm.dll

Path \??\c:\Program Files\asimpu\fibkm.dll
Size 144KB
SHA256 88efe04c328cb0a12831c3539a46cb5461eb4559b15a10eb0d3942bce1b6caa6
MD5 08e9646097a83b36591835e3c80ca0c7
SHA1 97313bd4a809c2f67bae68258fe88745dea7fa25
SHA512 6aaab3f6109cee81faa5280e8dac18d49673a209e399615bb17e3e569d9ccb9fc8c5ada60d6f9adbc4ef0851d4725a41201c1c0adf46134c7373a2aba3c6f021
SSDEEP 3072:9FSwhKDdKtTZVdOEaoxVDYn10zGJP4eLhSco/fWoB7re9Z9Idl8v4qClIS8:awhKDaZfFTxV8nXgesN/OpLcl8v4qwIh
TLSH
T184E302E2215AD2B3F4BE177D9C57050EF9BD14009BB98A5B57C0781A2C1AA36E83D373
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/4800-6-0x0000000000400000-0x0000000000461000-memory.dmp

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memory/5032-0-0x0000000000400000-0x0000000000461000-memory.dmp

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memory/5032-2-0x0000000000400000-0x0000000000461000-memory.dmp

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memory/6048-9-0x0000000010000000-0x0000000010054000-memory.dmp

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memory/6048-10-0x000000001004E000-0x000000001004F000-memory.dmp

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memory/6048-11-0x0000000010000000-0x0000000010054000-memory.dmp

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memory/6048-13-0x0000000010000000-0x0000000010054000-memory.dmp

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