farfli | a70c53d2c835f67d663c5215fc7eaab181f4c178a390e0fa3e4ee823d24c0311

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
20/04/2026, 04:40

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General

Target
2026-04-20_c538fadf07e6fec9bfcfee36ff95d551_elex_wannacry.exe
Size 151KB
Sample260420-falafac16x
SHA256 a70c53d2c835f67d663c5215fc7eaab181f4c178a390e0fa3e4ee823d24c0311
MD5 c538fadf07e6fec9bfcfee36ff95d551
SHA1 b9bd4c7d8f5b18684bb3f80d4a68896935423dc9
SHA512 4da4352722107cdc4d90c5d1688feaf8ae12d752c9e32aa5e30ce7239b31ead435bbd3e08d5880f14ce82f5b01e8e5869f9c4a4800d7f5e4f0d89e9bce98c935
SSDEEP 3072:mK4RNx65b4RoIwZpx10ZENfrGSQ7sDU/ySkNAq:ml65xiZuKoDkySkNA
TLSH
T10CE3D0CE1F7ACFDBE2202C74D1A416F742529C99EB2547974385FD9EB832C819C3612A
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/972-13-0x0000000010000000-0x000000001002E000-memory.dmp	family_farfli
behavioral2/memory/972-14-0x0000000010000000-0x000000001002E000-memory.dmp	family_farfli

Custom signature

Detects executables containing base64 encoded User Agent 2 IoCs

resource	yara_rule
behavioral2/memory/972-13-0x0000000010000000-0x000000001002E000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/972-14-0x0000000010000000-0x000000001002E000-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	972	rundll32.exe
3	972	rundll32.exe
4	972	rundll32.exe
5	972	rundll32.exe
6	972	rundll32.exe
7	972	rundll32.exe
9	972	rundll32.exe
10	972	rundll32.exe

Deletes itself 1 IoCs

pid	Process
5424	uqfhupd.exe

Executes dropped EXE 1 IoCs

pid	Process
5424	uqfhupd.exe

Loads dropped DLL 1 IoCs

pid	Process
972	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:\\volcv\\bsucn.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)	\??\g:	rundll32.exe
File opened (read-only)	\??\h:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\v:	rundll32.exe
File opened (read-only)	\??\l:	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)	\??\s:	rundll32.exe
File opened (read-only)	\??\z:	rundll32.exe
File opened (read-only)	\??\n:	rundll32.exe
File opened (read-only)	\??\a:	rundll32.exe
File opened (read-only)	\??\e:	rundll32.exe
File opened (read-only)	\??\i:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\k:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\w:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.exe
File opened (read-only)	\??\r:	rundll32.exe
File opened (read-only)	\??\t:	rundll32.exe
File opened (read-only)	\??\x:	rundll32.exe
File opened (read-only)	\??\y:	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	2026-04-20_c538fadf07e6fec9bfcfee36ff95d551_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	uqfhupd.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
1056	cmd.exe
3184	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
3184	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
972	rundll32.exe
972	rundll32.exe
972	rundll32.exe
972	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	972	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2632	2026-04-20_c538fadf07e6fec9bfcfee36ff95d551_elex_wannacry.exe
5424	uqfhupd.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2632 wrote to memory of 1056	2632	2026-04-20_c538fadf07e6fec9bfcfee36ff95d551_elex_wannacry.exe	79
PID 1056 wrote to memory of 3184	1056	cmd.exe	81
PID 1056 wrote to memory of 5424	1056	cmd.exe	82
PID 5424 wrote to memory of 972	5424	uqfhupd.exe	83

C:\Users\Admin\AppData\Local\Temp\2026-04-20_c538fadf07e6fec9bfcfee36ff95d551_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-04-20_c538fadf07e6fec9bfcfee36ff95d551_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2632
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&c:\uqfhupd.exe "C:\Users\Admin\AppData\Local\Temp\2026-04-20_c538fadf07e6fec9bfcfee36ff95d551_elex_wannacry.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:1056
- - 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:3184
- - \??\c:\uqfhupd.exe
    c:\uqfhupd.exe "C:\Users\Admin\AppData\Local\Temp\2026-04-20_c538fadf07e6fec9bfcfee36ff95d551_elex_wannacry.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:5424
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\volcv\bsucn.dll",init c:\uqfhupd.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:972

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

uqfhupd.exe

Path C:\uqfhupd.exe
Size 152KB
SHA256 cf7bb204c2c9a64e65088c5a470f11e49e58c4d0a881f05649c951b2da4f9304
MD5 c518b36e71cfed472a4d0235954971be
SHA1 68f8fbee910d853eb26dec4ad3d4965424e356df
SHA512 47e74163467547d976ace684d02783e78329266d9b51cc6ca9d73c622ed4f3b6adf3e146125a4ce6203af99e41147452c37e249697e38b3b7ccb381ede95aa7a
SSDEEP 3072:mK4RNx65b4RoIwZpx10ZENfrGSQ7sDU/ySkNAqG:ml65xiZuKoDkySkNAh
TLSH
T170E3D0CE1F7ACFDBE2202C74D1A416F742529C99EB2547974385FD8EB832D819C3612A
MD5 SHA1 SHA512 SSDEEP TLSH

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bsucn.dll

Path \??\c:\volcv\bsucn.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/972-11-0x0000000010000000-0x000000001002E000-memory.dmp

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memory/972-12-0x0000000000A60000-0x0000000000A61000-memory.dmp

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memory/972-13-0x0000000010000000-0x000000001002E000-memory.dmp

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memory/972-14-0x0000000010000000-0x000000001002E000-memory.dmp

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memory/972-15-0x0000000000A60000-0x0000000000A61000-memory.dmp

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memory/2632-0-0x0000000000400000-0x0000000000426000-memory.dmp

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memory/2632-2-0x0000000000400000-0x0000000000426000-memory.dmp

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memory/5424-6-0x0000000000400000-0x0000000000426000-memory.dmp

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memory/5424-8-0x0000000000400000-0x0000000000426000-memory.dmp

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