farfli | e1069e4cbb61844dae3edd31290946337c4a1b30522baba8bc7bd50f4288d4d1

Analysis

max time kernel
149s
max time network
147s
platform
windows11-21h2_x64
resource
win11-20260130-en
resource tags

arch:x64arch:x86image:win11-20260130-enlocale:en-usos:windows11-21h2-x64systemwindows
submitted
15/04/2026, 12:17

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General

Target
2026-04-15_dab90f58dc37beb298d28422ccf7c5cc_elex_wannacry.exe
Size 155KB
Sample260415-pgdcvags8t
SHA256 e1069e4cbb61844dae3edd31290946337c4a1b30522baba8bc7bd50f4288d4d1
MD5 dab90f58dc37beb298d28422ccf7c5cc
SHA1 54b1fdf1aafad041eb2f35348678b62aa03e5d35
SHA512 8d1739adef3a1ab3dbc5d99e761d1fdb88349e9aa10728bf2871f635c947d7adb0f2a73a440f3ddaf9aa1a5dde7c1b68f552a512e9c9c7a1ec6cc2ad6afe4f8a
SSDEEP 3072:mK4RNx65b4RoIwZpx10ZENfrGSQ7sDU/ySkNAqW:ml65xiZuKoDkySkNAB
TLSH
T145F3D0CE1F7ACFDBE2201C75D0A416F752669C99DB2147974385FD9EB832C81AC3212A
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 2 IoCs

resource	yara_rule
behavioral2/memory/4640-12-0x0000000010000000-0x000000001002E000-memory.dmp	family_farfli
behavioral2/memory/4640-13-0x0000000010000000-0x000000001002E000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 2 IoCs

resource	yara_rule
behavioral2/memory/4640-12-0x0000000010000000-0x000000001002E000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/4640-13-0x0000000010000000-0x000000001002E000-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
2	4640	rundll32.exe
3	4640	rundll32.exe
4	4640	rundll32.exe
5	4640	rundll32.exe
6	4640	rundll32.exe
8	4640	rundll32.exe
10	4640	rundll32.exe
11	4640	rundll32.exe

Deletes itself 1 IoCs

pid	Process
3644	pzhlr.exe

Executes dropped EXE 1 IoCs

pid	Process
3644	pzhlr.exe

Loads dropped DLL 1 IoCs

pid	Process
4640	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-1-5-21-3119821332-640943685-2562343641-1000\Software\Microsoft\Windows\CurrentVersion\Run\EvtMgr = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\hxxoy\\zrfde.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)	\??\p:	rundll32.exe
File opened (read-only)	\??\q:	rundll32.exe
File opened (read-only)	\??\r:	rundll32.exe
File opened (read-only)	\??\e:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\n:	rundll32.exe
File opened (read-only)	\??\o:	rundll32.exe
File opened (read-only)	\??\s:	rundll32.exe
File opened (read-only)	\??\a:	rundll32.exe
File opened (read-only)	\??\g:	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)	\??\t:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\v:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.exe
File opened (read-only)	\??\h:	rundll32.exe
File opened (read-only)	\??\w:	rundll32.exe
File opened (read-only)	\??\x:	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

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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PING.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	pzhlr.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-04-15_dab90f58dc37beb298d28422ccf7c5cc_elex_wannacry.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
5032	cmd.exe
4648	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
4648	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
4640	rundll32.exe
4640	rundll32.exe
4640	rundll32.exe
4640	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4640	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
5048	2026-04-15_dab90f58dc37beb298d28422ccf7c5cc_elex_wannacry.exe
3644	pzhlr.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 5048 wrote to memory of 5032	5048	2026-04-15_dab90f58dc37beb298d28422ccf7c5cc_elex_wannacry.exe	78
PID 5032 wrote to memory of 4648	5032	cmd.exe	80
PID 5032 wrote to memory of 3644	5032	cmd.exe	81
PID 3644 wrote to memory of 4640	3644	pzhlr.exe	82

C:\Users\Admin\AppData\Local\Temp\2026-04-15_dab90f58dc37beb298d28422ccf7c5cc_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-04-15_dab90f58dc37beb298d28422ccf7c5cc_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:5048
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&c:\pzhlr.exe "C:\Users\Admin\AppData\Local\Temp\2026-04-15_dab90f58dc37beb298d28422ccf7c5cc_elex_wannacry.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:5032
- - 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:4648
- - \??\c:\pzhlr.exe
    c:\pzhlr.exe "C:\Users\Admin\AppData\Local\Temp\2026-04-15_dab90f58dc37beb298d28422ccf7c5cc_elex_wannacry.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:3644
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\hxxoy\zrfde.dll",init c:\pzhlr.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:4640

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

pzhlr.exe

Path C:\pzhlr.exe
Size 155KB
SHA256 6e64dc4d1d6a698f39afcc8fd6bdbd7458ec4706cee2990f11105fa14866d907
MD5 56252eb6d4ae2fb10d45b49c6b8f644b
SHA1 ef7908f9cf1cbff33f017a7e0cc4a7329c4d927e
SHA512 f22b804d3ce8db1731fb8f7f3042d385d23ab4a71e46b0669c336fb75e1f51dc8fb9235cf938f8a5a8546bf37aec67cfc5159feafec878cc94c4d50f970678f2
SSDEEP 3072:mK4RNx65b4RoIwZpx10ZENfrGSQ7sDU/ySkNAqm:ml65xiZuKoDkySkNAj
TLSH
T143F3D0CE1F7ACFDBE2201C75D0A416F752669C99DB2147974385FD9EB832C81AC3212A
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

zrfde.dll

Path \??\c:\hxxoy\zrfde.dll
Size 42KB
SHA256 c7c41689de030df0f78f471422fa2a6383b36e77c94e7f6f124a96feb3e27ed7
MD5 36e3fb5964d663272cf1169e1e1ca478
SHA1 58115e08b49505bcbbb5c88a28a86222ba18d5d4
SHA512 daff53b11aa400437a06287707a334a09661c1ef7d0fd8beaf1a874c79c16fe45bd1188343d0623e839d3ead5ea2dd90896e37ccf3b252c7220c74989a9ba442
SSDEEP 768:t0inj1jJ5OeUMhBNSqHvMjjAipMkuG30sv2xEZkWldADAKPIp:t0ipV5uMhBt0jjAiusv22ZkWTOAKP8
TLSH
T1D813E19B6BEC7029FDD22BB4F4F66815EEB63F388CB2C70E114941AB1C3A9D51251706
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/3644-7-0x0000000000400000-0x0000000000426000-memory.dmp

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memory/4640-10-0x0000000010000000-0x000000001002E000-memory.dmp

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memory/4640-11-0x00000000024E0000-0x00000000024E1000-memory.dmp

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memory/4640-12-0x0000000010000000-0x000000001002E000-memory.dmp

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memory/4640-13-0x0000000010000000-0x000000001002E000-memory.dmp

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memory/4640-14-0x0000000000B50000-0x0000000000B6A000-memory.dmp

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memory/4640-15-0x00000000026B0000-0x00000000026B7000-memory.dmp

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memory/4640-16-0x00000000024E0000-0x00000000024E1000-memory.dmp

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memory/5048-0-0x0000000000400000-0x0000000000426000-memory.dmp

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memory/5048-2-0x0000000000400000-0x0000000000426000-memory.dmp

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