farfli | 140838fc9ff95c946a98caa576d8114ed8e559bf8df5896aa0d2ce79be60d58f

General

Target
2026-11-08_6777d797e5ad2808bad8d6d51aba410e_coinminer_elex_wannacry.exe
Size 250KB
Sample261109-cwcnmshs4x
SHA256 140838fc9ff95c946a98caa576d8114ed8e559bf8df5896aa0d2ce79be60d58f
MD5 6777d797e5ad2808bad8d6d51aba410e
SHA1 70eda858fac4699f47be16bf0ab262b162e51cbb
SHA512 63f07c4a536e8fbdabfb9540fa339a84f838353ecb5685ddfa599aacf2bb406e481011ea6340ff520670a64e572af50d8f591eae036661caef77f95284d5a387
SSDEEP 6144:etatPE5Txnev1zQBgexOdw6rpI9FsbLO:9PwTNCl+zGp60
TLSH
T116448C1233E84869E5EA3E33CEB6A630D7FAE9759C33D66F1394420D4E36904CB15366
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

backdoor bootkit defense_evasion 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 3 IoCs

resource	yara_rule
behavioral2/memory/3728-8-0x0000000010000000-0x0000000010038000-memory.dmp	family_farfli
behavioral2/memory/3728-10-0x0000000010000000-0x0000000010038000-memory.dmp	family_farfli
behavioral2/memory/3728-13-0x0000000010000000-0x0000000010038000-memory.dmp	family_farfli

Custom signature

Detects executables containing base64 encoded User Agent 3 IoCs

resource	yara_rule
behavioral2/memory/3728-8-0x0000000010000000-0x0000000010038000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/3728-10-0x0000000010000000-0x0000000010038000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/3728-13-0x0000000010000000-0x0000000010038000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

Custom signature

UPX dump on OEP (original entry point) 6 IoCs

resource	yara_rule
behavioral2/files/0x003b00000001166b-1.dat	UPX
behavioral2/files/0x000e00000001c527-5.dat	UPX
behavioral2/memory/3728-7-0x0000000010000000-0x0000000010038000-memory.dmp	UPX
behavioral2/memory/3728-8-0x0000000010000000-0x0000000010038000-memory.dmp	UPX
behavioral2/memory/3728-10-0x0000000010000000-0x0000000010038000-memory.dmp	UPX
behavioral2/memory/3728-13-0x0000000010000000-0x0000000010038000-memory.dmp	UPX

Deletes itself 1 TTPs 1 IoCs

defense_evasion

File Deletion

T1070.004

pid	Process
3384	itoddwt.exe

Executes dropped EXE 2 IoCs

pid	Process
3384	itoddwt.exe
3728	oassmf.exe

Loads dropped DLL 1 IoCs

pid	Process
3728	oassmf.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-1-5-21-560646293-820748483-2532804640-1000\Software\Microsoft\Windows\CurrentVersion\Run\Vicity = "c:\\Program Files\\ndfikf\\oassmf.exe \"c:\\Program Files\\ndfikf\\oassmf.dll\",Group"	oassmf.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)	\??\a:	oassmf.exe
File opened (read-only)	\??\g:	oassmf.exe
File opened (read-only)	\??\h:	oassmf.exe
File opened (read-only)	\??\i:	oassmf.exe
File opened (read-only)	\??\j:	oassmf.exe
File opened (read-only)	\??\k:	oassmf.exe
File opened (read-only)	\??\l:	oassmf.exe
File opened (read-only)	\??\t:	oassmf.exe
File opened (read-only)	\??\b:	oassmf.exe
File opened (read-only)	\??\n:	oassmf.exe
File opened (read-only)	\??\o:	oassmf.exe
File opened (read-only)	\??\r:	oassmf.exe
File opened (read-only)	\??\u:	oassmf.exe
File opened (read-only)	\??\w:	oassmf.exe
File opened (read-only)	\??\x:	oassmf.exe
File opened (read-only)	\??\m:	oassmf.exe
File opened (read-only)	\??\q:	oassmf.exe
File opened (read-only)	\??\d:	oassmf.exe
File opened (read-only)	\??\z:	oassmf.exe
File opened (read-only)	\??\p:	oassmf.exe
File opened (read-only)	\??\s:	oassmf.exe
File opened (read-only)	\??\v:	oassmf.exe
File opened (read-only)	\??\y:	oassmf.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	oassmf.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/files/0x000e00000001c527-5.dat	upx
behavioral2/memory/3728-7-0x0000000010000000-0x0000000010038000-memory.dmp	upx
behavioral2/memory/3728-8-0x0000000010000000-0x0000000010038000-memory.dmp	upx
behavioral2/memory/3728-10-0x0000000010000000-0x0000000010038000-memory.dmp	upx
behavioral2/memory/3728-13-0x0000000010000000-0x0000000010038000-memory.dmp	upx

Drops file in Program Files directory 3 IoCs

description	ioc	Process
File created	\??\c:\Program Files\ndfikf\oassmf.dll	itoddwt.exe
File created	\??\c:\Program Files\ndfikf\oassmf.exe	itoddwt.exe
File opened for modification	\??\c:\Program Files\ndfikf	itoddwt.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
5768	cmd.exe

Reads the TCP/IP host and domain name from the registry 1 TTPs 2 IoCs

The configured hostname and DNS domain identify the machine and are commonly collected to profile a host before it reports in.

discovery

System Network Configuration Discovery

T1016

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Domain	oassmf.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Hostname	oassmf.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	2026-11-08_6777d797e5ad2808bad8d6d51aba410e_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	itoddwt.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	oassmf.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
5768	cmd.exe
3312	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	oassmf.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	oassmf.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
3312	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
3728	oassmf.exe
3728	oassmf.exe
3728	oassmf.exe
3728	oassmf.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3728	oassmf.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
4204	2026-11-08_6777d797e5ad2808bad8d6d51aba410e_coinminer_elex_wannacry.exe
3384	itoddwt.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 4204 wrote to memory of 5768	4204	2026-11-08_6777d797e5ad2808bad8d6d51aba410e_coinminer_elex_wannacry.exe	89
PID 5768 wrote to memory of 3312	5768	cmd.exe	91
PID 5768 wrote to memory of 3384	5768	cmd.exe	92
PID 3384 wrote to memory of 3728	3384	itoddwt.exe	93

C:\Users\Admin\AppData\Local\Temp\2026-11-08_6777d797e5ad2808bad8d6d51aba410e_coinminer_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-11-08_6777d797e5ad2808bad8d6d51aba410e_coinminer_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4204
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\itoddwt.exe "C:\Users\Admin\AppData\Local\Temp\2026-11-08_6777d797e5ad2808bad8d6d51aba410e_coinminer_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:5768
- - 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:3312
- - C:\Users\Admin\AppData\Local\Temp\itoddwt.exe
    C:\Users\Admin\AppData\Local\Temp\\itoddwt.exe "C:\Users\Admin\AppData\Local\Temp\2026-11-08_6777d797e5ad2808bad8d6d51aba410e_coinminer_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:3384
  - - \??\c:\Program Files\ndfikf\oassmf.exe
      "c:\Program Files\ndfikf\oassmf.exe" "c:\Program Files\ndfikf\oassmf.dll",Group C:\Users\Admin\AppData\Local\Temp\itoddwt.exe
      4⤵
      Executes dropped EXE
      Loads dropped DLL
      Adds Run key to start application
      Enumerates connected drives
      Writes to the Master Boot Record (MBR)
      Reads the TCP/IP host and domain name from the registry
      System Location Discovery: System Language Discovery
      Checks processor information in registry
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:3728

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

Windows Command Shell

1

T1059.003

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Pre-OS Boot

1

T1542

Bootkit

1

T1542.003

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Indicator Removal

1

T1070

File Deletion

Modify Registry

Pre-OS Boot

T1542

Bootkit

1

T1542.003

Credential Access

Credentials from Password Stores

1

T1555

Credentials from Web Browsers

1

T1555.003

Unsecured Credentials

1

T1552

Credentials In Files

1

T1552.001

Discovery

Peripheral Device Discovery

Query Registry

Remote System Discovery

1

T1018

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

System Network Configuration Discovery

2

T1016

Internet Connection Discovery

1

T1016.001

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

oassmf.exe

Path C:\Program Files\ndfikf\oassmf.exe
Size 51KB
SHA256 ce6bb7eddc83762c708d4a41709ae00371dbdc09b2a380f28fa60b1edf917473
MD5 2e068ce2770fde8d1af4cb114b98df1f
SHA1 b6f9c2775babb025b22f915c3047aa627d07c312
SHA512 998d695eb56375e63df7db16740b89deb2cf630ccbead8bcf84a921ec6f4a4f9aef2755b703f7190f332b2008ebcc949363bcf8f392d7d07246c255b5073ed35
SSDEEP 1536:6G9yoVEpHP29I3fbcJboSUge5N+CnC/maz9Rh:8pv2mbcJboce58wvOR
TLSH
T137336C236A0A49B3DFE231780A9D7232526DD862075541F7A61057EAFD243E2EE743CF
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

itoddwt.exe

Path C:\Users\Admin\AppData\Local\Temp\itoddwt.exe
Size 250KB
SHA256 540ea4e9e0f6587bb42118234e9fae69162cd8ab56f88526a9497cc0860ac47b
MD5 6c3de1a43ce6b69813ce6ee64ae075e9
SHA1 e748736c5435bd2d18ac4b6127356200a1cf68a2
SHA512 f888575bcef4e05cd62b0a087acb4be4f8b20b557afd9e2811b7ca4ee4ac809ca36e55a162cd20c7ed19df0726fb7d55f123ded715ba8f1f962bbd0a84907699
SSDEEP 6144:etatPE5Txnev1zQBgexOdw6rpI9FsbLO:9PwTNCl+zGp60
TLSH
T1D5448C1233E84869E5EA3E33CEB6A630D7FAE9759C33D66F1394420D4E36904CB15366
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

oassmf.dll

Path \??\c:\Program Files\ndfikf\oassmf.dll
Size 97KB
SHA256 7f3dac1b7f832d0497c59f39b999ded3e81f55b0bc087a7aaeff9108ab5a2fe4
MD5 bc1f0ddb2334c66891bf3a0f011bc13a
SHA1 f5b9b3a8675582d2a51d40e2179f9c16c39e499f
SHA512 e1fb22ef469c4e71196f598c8150b6bc593a9af093b8107406ca82023691130cb94adef0da43ef90128d1f6338f7918a8aa59b3332880375ad4b9aca60d59671
SSDEEP 3072:BDpG6gzgHr5tCmfk455ecDBkdq+SStvAbG7:5pG6Sg9txRk/SS6bG7
TLSH
T10BA301F6290D7DD6CB354839D6528E35FA29EE348C589F887ECE7C13ACB8510E1641B1
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/3728-7-0x0000000010000000-0x0000000010038000-memory.dmp

Download

memory/3728-8-0x0000000010000000-0x0000000010038000-memory.dmp

Download

memory/3728-10-0x0000000010000000-0x0000000010038000-memory.dmp

Download

memory/3728-13-0x0000000010000000-0x0000000010038000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

Replay Monitor

Loading Replay Monitor...

Downloads