farfli | f03c8300457a2fa8a6e7de23380da0872e6a66b666168a9e325ef9a2086743d6

Analysis

max time kernel
148s
max time network
147s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260709-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
10/08/2026, 20:53

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General

Target
2026-08-10_158345262db285ef56571c120ef830c6_elex_wannacry.exe
Size 108KB
Sample260810-zpc26aybja
SHA256 f03c8300457a2fa8a6e7de23380da0872e6a66b666168a9e325ef9a2086743d6
MD5 158345262db285ef56571c120ef830c6
SHA1 898eb9115788e61429f24264de351be1fb2f8e4a
SHA512 0a656fb30ce161c43742def37956326ff903d021a137e48d166c63f79c37f79c356793928d006a9dd9656ed8bdf2cc33b4ef987350a42b548b01b645259bc868
SSDEEP 3072:NK4RNx6nb4RoIw/XBSeral6oaE0HGnvXuEOrc0p:Nl6XYeel6GGGVO
TLSH
T11CB3BF47ABA54DD5E1101CF4029B7B35937694892F15A797C388DE0EA03EE80DF362CE
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

backdoor bootkit discovery execution farfli persistence spyware stealer upx

Malware Config

Signatures

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

Detects Farfli Backdoor 5 IoCs

resource	yara_rule
behavioral2/memory/2316-10-0x0000000010000000-0x0000000010024000-memory.dmp	family_farfli
behavioral2/memory/2316-12-0x0000000010000000-0x0000000010024000-memory.dmp	family_farfli
behavioral2/memory/2316-13-0x0000000010000000-0x0000000010024000-memory.dmp	family_farfli
behavioral2/memory/2316-14-0x0000000010000000-0x0000000010024000-memory.dmp	family_farfli
behavioral2/memory/2316-17-0x0000000010000000-0x0000000010024000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 5 IoCs

resource	yara_rule
behavioral2/memory/2316-10-0x0000000010000000-0x0000000010024000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/2316-12-0x0000000010000000-0x0000000010024000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/2316-13-0x0000000010000000-0x0000000010024000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/2316-14-0x0000000010000000-0x0000000010024000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/2316-17-0x0000000010000000-0x0000000010024000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

UPX dump on OEP (original entry point) 8 IoCs

resource	yara_rule
behavioral2/memory/5368-6-0x0000000000400000-0x0000000000417000-memory.dmp	UPX
behavioral2/files/0x000e00000001c4c4-7.dat	UPX
behavioral2/memory/2316-9-0x0000000010000000-0x0000000010024000-memory.dmp	UPX
behavioral2/memory/2316-10-0x0000000010000000-0x0000000010024000-memory.dmp	UPX
behavioral2/memory/2316-12-0x0000000010000000-0x0000000010024000-memory.dmp	UPX
behavioral2/memory/2316-13-0x0000000010000000-0x0000000010024000-memory.dmp	UPX
behavioral2/memory/2316-14-0x0000000010000000-0x0000000010024000-memory.dmp	UPX
behavioral2/memory/2316-17-0x0000000010000000-0x0000000010024000-memory.dmp	UPX

Badlisted process makes network request 8 IoCs

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

flow	pid	Process
3	2316	rundll32.exe
10	2316	rundll32.exe
11	2316	rundll32.exe
12	2316	rundll32.exe
14	2316	rundll32.exe
15	2316	rundll32.exe
18	2316	rundll32.exe
19	2316	rundll32.exe

ACProtect 1.3x - 1.4x DLL software 1 IoCs

Detects file using ACProtect software.

resource	yara_rule
behavioral2/files/0x000e00000001c4c4-7.dat	acprotect

Deletes itself 1 IoCs

pid	Process
5368	jzcywpwwi.exe

Executes dropped EXE 1 IoCs

pid	Process
5368	jzcywpwwi.exe

Loads dropped DLL 1 IoCs

pid	Process
2316	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-1-5-21-1738198120-2966725515-3980530802-1000\Software\Microsoft\Windows\CurrentVersion\Run\EvtMgr = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\nkmvutz\\bjrbc.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)	\??\h:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\n:	rundll32.exe
File opened (read-only)	\??\v:	rundll32.exe
File opened (read-only)	\??\z:	rundll32.exe
File opened (read-only)	\??\d:	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)	\??\w:	rundll32.exe
File opened (read-only)	\??\y:	rundll32.exe
File opened (read-only)	\??\g:	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)	\??\u:	rundll32.exe
File opened (read-only)	\??\a:	rundll32.exe
File opened (read-only)	\??\b:	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)	\??\x:	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 7 IoCs

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

upx

resource	yara_rule
behavioral2/files/0x000e00000001c4c4-7.dat	upx
behavioral2/memory/2316-9-0x0000000010000000-0x0000000010024000-memory.dmp	upx
behavioral2/memory/2316-10-0x0000000010000000-0x0000000010024000-memory.dmp	upx
behavioral2/memory/2316-12-0x0000000010000000-0x0000000010024000-memory.dmp	upx
behavioral2/memory/2316-13-0x0000000010000000-0x0000000010024000-memory.dmp	upx
behavioral2/memory/2316-14-0x0000000010000000-0x0000000010024000-memory.dmp	upx
behavioral2/memory/2316-17-0x0000000010000000-0x0000000010024000-memory.dmp	upx

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
3416	cmd.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	jzcywpwwi.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-08-10_158345262db285ef56571c120ef830c6_elex_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
3416	cmd.exe
824	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
824	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2316	rundll32.exe
2316	rundll32.exe
2316	rundll32.exe
2316	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2316	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
3556	2026-08-10_158345262db285ef56571c120ef830c6_elex_wannacry.exe
5368	jzcywpwwi.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 3556 wrote to memory of 3416	3556	2026-08-10_158345262db285ef56571c120ef830c6_elex_wannacry.exe	88
PID 3416 wrote to memory of 824	3416	cmd.exe	91
PID 3416 wrote to memory of 5368	3416	cmd.exe	92
PID 5368 wrote to memory of 2316	5368	jzcywpwwi.exe	93

C:\Users\Admin\AppData\Local\Temp\2026-08-10_158345262db285ef56571c120ef830c6_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-08-10_158345262db285ef56571c120ef830c6_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3556
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&c:\jzcywpwwi.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-10_158345262db285ef56571c120ef830c6_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:3416
- - 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:824
- - \??\c:\jzcywpwwi.exe
    c:\jzcywpwwi.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-10_158345262db285ef56571c120ef830c6_elex_wannacry.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:5368
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\nkmvutz\bjrbc.dll",init c:\jzcywpwwi.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:2316

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

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

jzcywpwwi.exe

Path \??\c:\jzcywpwwi.exe
Size 108KB
SHA256 55e366953756b017a27c616140cbbb870fb2a8b3008ae29e1724f927aaaf8319
MD5 b83056dfb2de26349bb5002d30e94ad1
SHA1 5a13a0a21d1cd084c0299514e970c93489bffc01
SHA512 c016fa4768f5e6754bcd56bed47ba71a7afa035ad98f40ecda4f5c85875dcca8a5509449c1944a7d820c6180ea924f45d54fd9410db08d2936fab715cdfc4f64
SSDEEP 3072:NK4RNx6nb4RoIw/XBSeral6oaE0HGnvXuEOrc0pw:Nl6XYeel6GGGVOu
TLSH
T180B3AE47ABA54DD5E0111CF4029B7B35937698892F15A797C388DE0EA03EE80DF362CE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

bjrbc.dll

Path \??\c:\nkmvutz\bjrbc.dll
Size 46KB
SHA256 b6bc7902da0250f6ca920b35b222f6a0fe62102caf05d2a1722c4d3b225a0a9e
MD5 42fe886bcb6460f7c2a46e21ecac5da6
SHA1 7d9a1c9fe17121cf61444da965f29e974a95ede2
SHA512 3d1a7dc1d9ca8a4376302ba20df584ad59b98e0d3b18b06b22d7f5a455833ce124e412fc1922a3b704dcbafa31987cda3115c9a71dd6299683502cebae33567c
SSDEEP 768:P60NIyOvlPSGxZ00FBsMT0fdB5h3vU7ExCClpoduUglNgLoR/C:P6e4lP5rvz1Vd8H/C
TLSH
T10023F15733A8577BC9E621FA3263BE142B357019CB3A83545CB9B6572C21C8D927930F
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/2316-9-0x0000000010000000-0x0000000010024000-memory.dmp

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memory/2316-10-0x0000000010000000-0x0000000010024000-memory.dmp

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memory/2316-12-0x0000000010000000-0x0000000010024000-memory.dmp

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memory/2316-13-0x0000000010000000-0x0000000010024000-memory.dmp

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memory/2316-14-0x0000000010000000-0x0000000010024000-memory.dmp

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memory/2316-17-0x0000000010000000-0x0000000010024000-memory.dmp

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memory/3556-0-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/3556-2-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/5368-6-0x0000000000400000-0x0000000000417000-memory.dmp

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