farfli | 160fd2b0d1bbfda4017818391f27a8155ed7905340e90c1fa77afb7891e0488d

Analysis

max time kernel
149s
max time network
151s
platform
windows11-21h2_x64
resource
win11-20260130-en
resource tags

arch:x64arch:x86image:win11-20260130-enlocale:en-usos:windows11-21h2-x64systemwindows
submitted
18/04/2026, 10:06

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General

Target
160fd2b0d1bbfda4017818391f27a8155ed7905340e90c1fa77afb7891e0488d.exe
Size 101KB
Sample260418-l5hexscw21
SHA256 160fd2b0d1bbfda4017818391f27a8155ed7905340e90c1fa77afb7891e0488d
MD5 69270f68c182a27aae475f9d359029e3
SHA1 c8c5dbe140192c45e964ecba90c049e53ee94099
SHA512 385d59f9d6c3e4dac8c8d76cc1434c9f7e0be03dcb46a0ad0a7d201eb2da7d81f8717b109256328d617ba3f0188e8f047ba308f8d1d267b062e92393b858a0da
SSDEEP 1536:vRiAXaKD5gxzmwYEM/D3ozc4I8JboecWtX48:piAXaKDeKNnD36cb8tI8
TLSH
T18CA39D42ABF087A1E0619DB506735B629E73FC2B193482277BD6B70EAC34F40EE25355
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 4 IoCs

resource	yara_rule
behavioral2/memory/1800-12-0x0000000010000000-0x000000001002E000-memory.dmp	family_farfli
behavioral2/memory/1800-13-0x0000000010001000-0x000000001001E000-memory.dmp	family_farfli
behavioral2/memory/1800-14-0x0000000010000000-0x000000001002E000-memory.dmp	family_farfli
behavioral2/memory/1800-16-0x0000000010001000-0x000000001001E000-memory.dmp	family_farfli

Badlisted process makes network request 15 IoCs

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

flow	pid	Process
1	1800	rundll32.exe
2	1800	rundll32.exe
3	1800	rundll32.exe
4	1800	rundll32.exe
5	1800	rundll32.exe
6	1800	rundll32.exe
7	1800	rundll32.exe
8	1800	rundll32.exe
9	1800	rundll32.exe
10	1800	rundll32.exe
13	1800	rundll32.exe
14	1800	rundll32.exe
16	1800	rundll32.exe
17	1800	rundll32.exe
18	1800	rundll32.exe

Deletes itself 1 IoCs

pid	Process
4924	bwjfexp.exe

Executes dropped EXE 1 IoCs

pid	Process
4924	bwjfexp.exe

Loads dropped DLL 1 IoCs

pid	Process
1800	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-1-5-21-2122505878-652277452-2375749442-1000\Software\Microsoft\Windows\CurrentVersion\Run\EvtMgr = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\sjwbn\\rqgcrjwb.dll\",GetWindowClass"	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)	\??\j:	rundll32.exe
File opened (read-only)	\??\l:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\o:	rundll32.exe
File opened (read-only)	\??\p:	rundll32.exe
File opened (read-only)	\??\q:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.exe
File opened (read-only)	\??\h:	rundll32.exe
File opened (read-only)	\??\s:	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)	\??\z:	rundll32.exe
File opened (read-only)	\??\a:	rundll32.exe
File opened (read-only)	\??\t:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\g:	rundll32.exe
File opened (read-only)	\??\k:	rundll32.exe
File opened (read-only)	\??\n:	rundll32.exe
File opened (read-only)	\??\r:	rundll32.exe
File opened (read-only)	\??\y:	rundll32.exe
File opened (read-only)	\??\e:	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

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	160fd2b0d1bbfda4017818391f27a8155ed7905340e90c1fa77afb7891e0488d.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	bwjfexp.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
1824	cmd.exe
1196	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
1196	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1800	rundll32.exe
1800	rundll32.exe
1800	rundll32.exe
1800	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1800	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
4292	160fd2b0d1bbfda4017818391f27a8155ed7905340e90c1fa77afb7891e0488d.exe
4924	bwjfexp.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 4292 wrote to memory of 1824	4292	160fd2b0d1bbfda4017818391f27a8155ed7905340e90c1fa77afb7891e0488d.exe	80
PID 1824 wrote to memory of 1196	1824	cmd.exe	82
PID 1824 wrote to memory of 4924	1824	cmd.exe	83
PID 4924 wrote to memory of 1800	4924	bwjfexp.exe	84

C:\Users\Admin\AppData\Local\Temp\160fd2b0d1bbfda4017818391f27a8155ed7905340e90c1fa77afb7891e0488d.exe
"C:\Users\Admin\AppData\Local\Temp\160fd2b0d1bbfda4017818391f27a8155ed7905340e90c1fa77afb7891e0488d.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4292
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&c:\bwjfexp.exe "C:\Users\Admin\AppData\Local\Temp\160fd2b0d1bbfda4017818391f27a8155ed7905340e90c1fa77afb7891e0488d.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:1824
- - 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:1196
- - \??\c:\bwjfexp.exe
    c:\bwjfexp.exe "C:\Users\Admin\AppData\Local\Temp\160fd2b0d1bbfda4017818391f27a8155ed7905340e90c1fa77afb7891e0488d.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:4924
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\sjwbn\rqgcrjwb.dll",GetWindowClass c:\bwjfexp.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:1800

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

bwjfexp.exe

Path C:\bwjfexp.exe
Size 102KB
SHA256 58805c5f51e7af46331af7721482fcecac3afa57634dfc62b9fc6770ab05020f
MD5 cfda9d43dc3998a64ae22785290caf9e
SHA1 04c7c7cb5f07409eb87871f3890b6fff7b08e64e
SHA512 4a475082ed8195bd7e4afd76cc788f10128ff686e2d6c4060ca25d5f10f6180379a4b4a071ec6b5b31d866d3d3b8f6f4523b2c1bb45cfb75af77a0b1ce7cd865
SSDEEP 1536:vRiAXaKD5gxzmwYEM/D3ozc4I8JboecWtX48N:piAXaKDeKNnD36cb8tI8N
TLSH
T1B0A3AE42ABF087A1E0659DB506735B629E73FC2A193482277BD6B70EEC30F40EE25355
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

rqgcrjwb.dll

Path \??\c:\sjwbn\rqgcrjwb.dll
Size 46KB
SHA256 f57f9e54f4774c2b944fb070ae0c2a02cbb4b7686ab3207544c3ccaff0ff3dd9
MD5 a3fd41430ddcaa55fde840788925406a
SHA1 dbdd87f5c1bbf6a6f44c2e2c4744675d5e4e75c2
SHA512 23109572cfc9a282ea3ec84d93bfe02303d27f365ad2d9f47f6234f91da14c64f80133cc5e49746dfcb65d2454b7e7c13eff59ba4bbc18e09d2fb1c630ba59c9
SSDEEP 768:2sUfnvxs6iLlhpfFPtnQf7kifD/v7yb9Bh7Cb0VQJojZC/xjTk:2sJT1qf4W/vub9nnV1jZC/xE
TLSH
T19D2302C8A6F08EF3D2F90B7980E046DCDCFDB939877381150566008E7C71057FA446AA
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/1800-12-0x0000000010000000-0x000000001002E000-memory.dmp

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memory/1800-13-0x0000000010001000-0x000000001001E000-memory.dmp

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memory/1800-14-0x0000000010000000-0x000000001002E000-memory.dmp

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memory/1800-15-0x0000000000EF0000-0x0000000000F15000-memory.dmp

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memory/1800-16-0x0000000010001000-0x000000001001E000-memory.dmp

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memory/4292-0-0x0000000000400000-0x000000000041A000-memory.dmp

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memory/4292-3-0x0000000000400000-0x000000000041A000-memory.dmp

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memory/4292-2-0x0000000000980000-0x00000000009A5000-memory.dmp

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memory/4924-8-0x0000000000860000-0x0000000000885000-memory.dmp

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memory/4924-9-0x0000000000400000-0x000000000041A000-memory.dmp

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