farfli | db2c63da6c6f49f44e8504ac0548d86d1bfb54c31ccfcaae6723e59095f46d75

Analysis

max time kernel
150s
max time network
135s
platform
windows11-21h2_x64
resource
win11-20260130-en
resource tags

arch:x64arch:x86image:win11-20260130-enlocale:en-usos:windows11-21h2-x64systemwindows
submitted
05/05/2026, 04:32

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General

Target
2026-05-05_fbf32f0ba9034cbadbf9a45a82c00c64_coinminer_elex_wannacry.exe
Size 150KB
Sample260505-e553nagv4y
SHA256 db2c63da6c6f49f44e8504ac0548d86d1bfb54c31ccfcaae6723e59095f46d75
MD5 fbf32f0ba9034cbadbf9a45a82c00c64
SHA1 07e15f022fa88ef358a94436eec89b52da980c52
SHA512 10168c93137774265d7777766dc9392e8900a16529b8f3a0ce94c661814ebcba02c9a57443753810b19dc118102e6ef5ea8027b6ef6a390dad717e5b8ff1fd7c
SSDEEP 1536:B3aacz2htqkUla/NGVcJ/gAqcX0JMseuiGSeNVvDi0tMuUJJny3GM+9qKvU:Ua/qc9rqzMseNoVv9EJFnM8qKvU
TLSH
T160E3270267F6C194F0B31E34CA3646F08BA6BC69FA70921B17847E4EBD31A15ED21776
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

backdoor bootkit discovery farfli persistence spyware stealer upx

Malware Config

Signatures

Family: Farfli
Farfli is a Windows backdoor written in C++.
backdoor farfli

Detects Farfli Backdoor 3 IoCs

resource	yara_rule
behavioral2/memory/4720-11-0x0000000010001000-0x0000000010021000-memory.dmp	family_farfli
behavioral2/memory/4720-12-0x0000000010000000-0x0000000010032000-memory.dmp	family_farfli
behavioral2/memory/4720-13-0x0000000010001000-0x0000000010021000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 1 IoCs

resource	yara_rule
behavioral2/memory/4720-12-0x0000000010000000-0x0000000010032000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/4944-0-0x0000000000400000-0x0000000000423000-memory.dmp	UPX
behavioral2/memory/4944-2-0x0000000000400000-0x0000000000423000-memory.dmp	UPX
behavioral2/files/0x000d00000002ad6a-4.dat	UPX
behavioral2/memory/5360-7-0x0000000000400000-0x0000000000423000-memory.dmp	UPX

Badlisted process makes network request 9 IoCs

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

flow	pid	Process
1	4720	rundll32.exe
2	4720	rundll32.exe
3	4720	rundll32.exe
4	4720	rundll32.exe
6	4720	rundll32.exe
7	4720	rundll32.exe
8	4720	rundll32.exe
11	4720	rundll32.exe
12	4720	rundll32.exe

Deletes itself 1 IoCs

pid	Process
5360	kvbwi.exe

Executes dropped EXE 1 IoCs

pid	Process
5360	kvbwi.exe

Loads dropped DLL 1 IoCs

pid	Process
4720	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-1-5-21-2397528088-2630719772-1129911217-1000\Software\Microsoft\Windows\CurrentVersion\Run\EvtMgr = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\iazfj\\kmbcy.dll\",init"	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)	\??\b:	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)	\??\q:	rundll32.exe
File opened (read-only)	\??\r:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\x:	rundll32.exe
File opened (read-only)	\??\h:	rundll32.exe
File opened (read-only)	\??\i:	rundll32.exe
File opened (read-only)	\??\k:	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)	\??\s:	rundll32.exe
File opened (read-only)	\??\t:	rundll32.exe
File opened (read-only)	\??\v:	rundll32.exe
File opened (read-only)	\??\w:	rundll32.exe
File opened (read-only)	\??\a:	rundll32.exe
File opened (read-only)	\??\e:	rundll32.exe
File opened (read-only)	\??\y:	rundll32.exe
File opened (read-only)	\??\z:	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

UPX packed file 4 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral2/memory/4944-0-0x0000000000400000-0x0000000000423000-memory.dmp	upx
behavioral2/memory/4944-2-0x0000000000400000-0x0000000000423000-memory.dmp	upx
behavioral2/files/0x000d00000002ad6a-4.dat	upx
behavioral2/memory/5360-7-0x0000000000400000-0x0000000000423000-memory.dmp	upx

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	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-05-05_fbf32f0ba9034cbadbf9a45a82c00c64_coinminer_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	kvbwi.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
5072	cmd.exe
4992	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
4992	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
4720	rundll32.exe
4720	rundll32.exe
4720	rundll32.exe
4720	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4720	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
4944	2026-05-05_fbf32f0ba9034cbadbf9a45a82c00c64_coinminer_elex_wannacry.exe
5360	kvbwi.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 4944 wrote to memory of 5072	4944	2026-05-05_fbf32f0ba9034cbadbf9a45a82c00c64_coinminer_elex_wannacry.exe	79
PID 5072 wrote to memory of 4992	5072	cmd.exe	81
PID 5072 wrote to memory of 5360	5072	cmd.exe	82
PID 5360 wrote to memory of 4720	5360	kvbwi.exe	83

C:\Users\Admin\AppData\Local\Temp\2026-05-05_fbf32f0ba9034cbadbf9a45a82c00c64_coinminer_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-05-05_fbf32f0ba9034cbadbf9a45a82c00c64_coinminer_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4944
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&c:\kvbwi.exe "C:\Users\Admin\AppData\Local\Temp\2026-05-05_fbf32f0ba9034cbadbf9a45a82c00c64_coinminer_elex_wannacry.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:5072
- - 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:4992
- - \??\c:\kvbwi.exe
    c:\kvbwi.exe "C:\Users\Admin\AppData\Local\Temp\2026-05-05_fbf32f0ba9034cbadbf9a45a82c00c64_coinminer_elex_wannacry.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:5360
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\iazfj\kmbcy.dll",init c:\kvbwi.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:4720

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

kvbwi.exe

Path C:\kvbwi.exe
Size 150KB
SHA256 b9b11c481513ecf1ab88f93f0341aef05ae54975aba8dd24606e8caa2e29396f
MD5 f4b06a03cb5df27c96b43737ed54ee1c
SHA1 dde3b14c136c50f880e203afbc7e33025abe249e
SHA512 c85ebc0801df01d51e4fd89f8bd0b4bc8503089620c2579d5eeeab5c45c4fa3324bed9153f3182be50f25c0bf7234b243eec0a9bc2163eeea0d31d29b59580af
SSDEEP 1536:B3aacz2htqkUla/NGVcJ/gAqcX0JMseuiGSeNVvDi0tMuUJJny3GM+9qKvK:Ua/qc9rqzMseNoVv9EJFnM8qKvK
TLSH
T193E3370267F6C194F0B31E34CA3646F08BA6BC69FA70921B17847E4EBD31A15ED21776
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

kmbcy.dll

Path \??\c:\iazfj\kmbcy.dll
Size 50KB
SHA256 a632527bcd457c9a4cfce83e7a9a675baff790b0279de5d8ea3192dfb2dd888a
MD5 ab32c5bfd7ecfbe9ed733dfb81210933
SHA1 4d5c6e7a0031691f12e78b096ff928b0d55bdfab
SHA512 59b971146292074d76d23d5f26889108f4d6e33804332449f4c589bf8a8d53e37ac8dfea47e9d3c5ae0f382ae1acf25c4968bea87b3f5ff9d51f2274229c1ab5
SSDEEP 1536:mrrG57ZqLLpf+Xz+HOtygmRnO/x5Rq8Gm:mwKGqutWM/x281
TLSH
T12033F1F4EFB4E067ECBA5F743E6A6215DA727B10C63188EA518090135F335CACA18717
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/4720-11-0x0000000010001000-0x0000000010021000-memory.dmp

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memory/4720-10-0x0000000010000000-0x0000000010032000-memory.dmp

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memory/4720-12-0x0000000010000000-0x0000000010032000-memory.dmp

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memory/4720-13-0x0000000010001000-0x0000000010021000-memory.dmp

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memory/4720-14-0x0000000001160000-0x00000000011AA000-memory.dmp

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memory/4944-0-0x0000000000400000-0x0000000000423000-memory.dmp

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memory/4944-2-0x0000000000400000-0x0000000000423000-memory.dmp

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memory/5360-7-0x0000000000400000-0x0000000000423000-memory.dmp

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