farfli | a02f7dc46c0866f09388a37907c4bbe3287f46d16e88ee108f2e1a8c693e4b53

Analysis

max time kernel
149s
max time network
144s
platform
windows10-2004_x64
resource
win10v2004-20260513-en
resource tags

arch:x64arch:x86image:win10v2004-20260513-enlocale:en-usos:windows10-2004-x64systemwindows
submitted
08/08/2026, 01:53

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General

Target
2026-08-07_10600f496e71fc52ee85a28d22190323_elex_wannacry.exe
Size 588KB
Sample260808-cbhddsxhke
SHA256 a02f7dc46c0866f09388a37907c4bbe3287f46d16e88ee108f2e1a8c693e4b53
MD5 10600f496e71fc52ee85a28d22190323
SHA1 3bacf64bc8d0153c3cbb6607e99f8d7db89a60e9
SHA512 502cba8d6c034c602a184862958a74ce141ababb9996a02193114a87150dbdffccb9d193b2854720ade71f40e437310f4915324a2f134614862a10e84a94c406
SSDEEP 6144:WAMejnmtYZnAmGJ/8uADNFlbF/joovD6fkjOmfPWq6da0npNu:HMimtuAmGJ/85BbFb976s3Wq6d7npU
TLSH
T192D41242F59288BAD438DB34C75B8B35E3D299747A064362838C6C9FEDA9F0787153D8
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

backdoor bootkit discovery execution 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
behavioral1/memory/1432-12-0x0000000010000000-0x0000000010090000-memory.dmp	family_farfli
behavioral1/memory/1432-13-0x0000000010000000-0x0000000010090000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 2 IoCs

resource	yara_rule
behavioral1/memory/1432-12-0x0000000010000000-0x0000000010090000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/1432-13-0x0000000010000000-0x0000000010090000-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
5	1432	rundll32.exe
13	1432	rundll32.exe
14	1432	rundll32.exe
15	1432	rundll32.exe
27	1432	rundll32.exe
28	1432	rundll32.exe
38	1432	rundll32.exe
49	1432	rundll32.exe

Deletes itself 1 IoCs

pid	Process
1800	taaeh.exe

Executes dropped EXE 1 IoCs

pid	Process
1800	taaeh.exe

Loads dropped DLL 1 IoCs

pid	Process
1432	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-1-5-21-204488895-2999877624-296153668-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Meture = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\Program Files\\aerlf\\yveyo.dll\",Decompress"	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)	\??\n:	rundll32.exe
File opened (read-only)	\??\p:	rundll32.exe
File opened (read-only)	\??\r:	rundll32.exe
File opened (read-only)	\??\a:	rundll32.exe
File opened (read-only)	\??\g:	rundll32.exe
File opened (read-only)	\??\h:	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)	\??\y:	rundll32.exe
File opened (read-only)	\??\z:	rundll32.exe
File opened (read-only)	\??\e:	rundll32.exe
File opened (read-only)	\??\s:	rundll32.exe
File opened (read-only)	\??\l:	rundll32.exe
File opened (read-only)	\??\o:	rundll32.exe
File opened (read-only)	\??\q:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\x:	rundll32.exe
File opened (read-only)	\??\b:	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

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

Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs

pid	Process
1432	rundll32.exe

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File opened for modification	\??\c:\Program Files\aerlf	taaeh.exe
File created	\??\c:\Program Files\aerlf\yveyo.dll	taaeh.exe

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
1028	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	2026-08-07_10600f496e71fc52ee85a28d22190323_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	taaeh.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
1028	cmd.exe
4844	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 value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	rundll32.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	rundll32.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
4844	PING.EXE

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
1432	rundll32.exe
1432	rundll32.exe
1432	rundll32.exe
1432	rundll32.exe
1432	rundll32.exe
1432	rundll32.exe
1432	rundll32.exe
1432	rundll32.exe
1432	rundll32.exe
1432	rundll32.exe
1432	rundll32.exe
1432	rundll32.exe
1432	rundll32.exe
1432	rundll32.exe
1432	rundll32.exe
1432	rundll32.exe
1432	rundll32.exe
1432	rundll32.exe
1432	rundll32.exe
1432	rundll32.exe
1432	rundll32.exe
1432	rundll32.exe
1432	rundll32.exe
1432	rundll32.exe
1432	rundll32.exe
1432	rundll32.exe
1432	rundll32.exe
1432	rundll32.exe
1432	rundll32.exe
1432	rundll32.exe
1432	rundll32.exe
1432	rundll32.exe
1432	rundll32.exe
1432	rundll32.exe
1432	rundll32.exe
1432	rundll32.exe
1432	rundll32.exe
1432	rundll32.exe
1432	rundll32.exe
1432	rundll32.exe
1432	rundll32.exe
1432	rundll32.exe
1432	rundll32.exe
1432	rundll32.exe
1432	rundll32.exe
1432	rundll32.exe
1432	rundll32.exe
1432	rundll32.exe
1432	rundll32.exe
1432	rundll32.exe
1432	rundll32.exe
1432	rundll32.exe
1432	rundll32.exe
1432	rundll32.exe
1432	rundll32.exe
1432	rundll32.exe
1432	rundll32.exe
1432	rundll32.exe
1432	rundll32.exe
1432	rundll32.exe
1432	rundll32.exe
1432	rundll32.exe
1432	rundll32.exe
1432	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1432	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
1904	2026-08-07_10600f496e71fc52ee85a28d22190323_elex_wannacry.exe
1800	taaeh.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1904 wrote to memory of 1028	1904	2026-08-07_10600f496e71fc52ee85a28d22190323_elex_wannacry.exe	86
PID 1028 wrote to memory of 4844	1028	cmd.exe	88
PID 1028 wrote to memory of 1800	1028	cmd.exe	89
PID 1800 wrote to memory of 1432	1800	taaeh.exe	90

C:\Users\Admin\AppData\Local\Temp\2026-08-07_10600f496e71fc52ee85a28d22190323_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-08-07_10600f496e71fc52ee85a28d22190323_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1904
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\taaeh.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-07_10600f496e71fc52ee85a28d22190323_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:1028
- - 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:4844
- - C:\Users\Admin\AppData\Local\Temp\taaeh.exe
    C:\Users\Admin\AppData\Local\Temp\\taaeh.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-07_10600f496e71fc52ee85a28d22190323_elex_wannacry.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - Drops file in Program Files directory
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:1800
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\Program Files\aerlf\yveyo.dll",Decompress C:\Users\Admin\AppData\Local\Temp\taaeh.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)
      Suspicious use of NtSetInformationThreadHideFromDebugger
      System Location Discovery: System Language Discovery
      Checks processor information in registry
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:1432

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

taaeh.exe

Path C:\Users\Admin\AppData\Local\Temp\taaeh.exe
Size 588KB
SHA256 1ce18b9fc3342172f3ceac0ec9349749bc6b89b6ee83af3f71cec489054bb79f
MD5 67164b05a3df382a98b2b2679eb334a9
SHA1 135103c550eea86583b8bb279546bfc4e14ac6e3
SHA512 d9906df22ecb40bd6770823cb890640278b23bb1d1f8ff18e59104b28bc8e09f9c3455dc4ced9f5b63ece63c7903d38be141ff109224cf43fa3f2279c608abc2
SSDEEP 6144:WAMejnmtYZnAmGJ/8uADNFlbF/joovD6fkjOmfPWq6da0npNur:HMimtuAmGJ/85BbFb976s3Wq6d7npUr
TLSH
T17DD41242F59288BAD438DB34C75B8B35E3D299747A064362838C6C9FEDA9F0787153D8
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

yveyo.dll

Path \??\c:\Program Files\aerlf\yveyo.dll
Size 266KB
SHA256 6f531ce76a6d45e7a2466f48e3fcd1fb7b13cd592701e26dd884136dacea4f37
MD5 d1b9b795056fc6a979eba3f2c484241f
SHA1 e9c827180a8acbdeebaf15247c9ec32797f2198d
SHA512 1ec11a31eb02dcb37c58c2f9d50b596657f873875ae64f2c2ce3b982455fc6232110e51082657bcd2d9942ccef9dc0857b2f0fcf017ac25bee105b41cb6164b8
SSDEEP 6144:/hJkmMlGAzciA4nhT5ai7Ohk/0BFen/xmp:/hJEQloHOXM4p
TLSH
T18E4423915B3E34B3FC5F2B327A77E56FFB7422342862899FC78F422165A36501019792
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/1432-10-0x0000000010000000-0x0000000010090000-memory.dmp

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memory/1432-12-0x0000000010000000-0x0000000010090000-memory.dmp

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memory/1432-13-0x0000000010000000-0x0000000010090000-memory.dmp

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memory/1800-7-0x0000000000400000-0x0000000000494000-memory.dmp

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memory/1904-0-0x0000000000400000-0x0000000000494000-memory.dmp

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memory/1904-2-0x0000000000400000-0x0000000000494000-memory.dmp

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