farfli | 90dd6f7ae2d90247d2af79e230e866c44cb8f0c3e886ef64f553927f95b09a49

General

Target
2026-04-19_4a53507f242a2d04c609d47429ef9a06_coinminer_elex_wannacry.exe
Size 263KB
Sample260419-1yllbsaw6j
SHA256 90dd6f7ae2d90247d2af79e230e866c44cb8f0c3e886ef64f553927f95b09a49
MD5 4a53507f242a2d04c609d47429ef9a06
SHA1 1cf9aa2e972b8af66ab860344ad9afddff13113a
SHA512 c6d1dd3e07a91d0f8fb981efe63385c1904765106d9e9b25d2090e1530c2f028da1ecd08bb1ea2bdee8f3eb1f2175fe23acc25a5501748ef7d117b06628ea9a0
SSDEEP 6144:qtatPE5Txnev1zQBgexOdw6rpI9FsILd:5PwTNCl+zGp6f
TLSH
T18A447C1233E44869E4EA7E32CEB6A630D7FAE9759C33D66F0394430E5E36904CB15366
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

backdoor bootkit discovery farfli persistence spyware stealer upx

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/3028-14-0x0000000010000000-0x0000000010038000-memory.dmp	family_farfli
behavioral1/memory/3028-18-0x0000000010000000-0x0000000010038000-memory.dmp	family_farfli

Custom signature

Detects executables containing base64 encoded User Agent 2 IoCs

resource	yara_rule
behavioral1/memory/3028-14-0x0000000010000000-0x0000000010038000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/3028-18-0x0000000010000000-0x0000000010038000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

Custom signature

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral1/files/0x0009000000021698-3.dat	UPX
behavioral1/memory/3028-13-0x0000000010000000-0x0000000010038000-memory.dmp	UPX
behavioral1/files/0x000800000002437e-12.dat	UPX
behavioral1/memory/3028-14-0x0000000010000000-0x0000000010038000-memory.dmp	UPX
behavioral1/memory/3028-18-0x0000000010000000-0x0000000010038000-memory.dmp	UPX

Deletes itself 1 IoCs

pid	Process
1972	echno.exe

Executes dropped EXE 2 IoCs

pid	Process
1972	echno.exe
3028	nrlz.exe

Loads dropped DLL 1 IoCs

pid	Process
3028	nrlz.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-1-5-21-1609746302-1884177235-1125644204-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Vicity = "c:\\Program Files\\eyxcpv\\nrlz.exe \"c:\\Program Files\\eyxcpv\\nrlzt.dll\",Group"	nrlz.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)	\??\j:	nrlz.exe
File opened (read-only)	\??\k:	nrlz.exe
File opened (read-only)	\??\o:	nrlz.exe
File opened (read-only)	\??\b:	nrlz.exe
File opened (read-only)	\??\e:	nrlz.exe
File opened (read-only)	\??\i:	nrlz.exe
File opened (read-only)	\??\l:	nrlz.exe
File opened (read-only)	\??\n:	nrlz.exe
File opened (read-only)	\??\p:	nrlz.exe
File opened (read-only)	\??\r:	nrlz.exe
File opened (read-only)	\??\s:	nrlz.exe
File opened (read-only)	\??\g:	nrlz.exe
File opened (read-only)	\??\h:	nrlz.exe
File opened (read-only)	\??\q:	nrlz.exe
File opened (read-only)	\??\t:	nrlz.exe
File opened (read-only)	\??\u:	nrlz.exe
File opened (read-only)	\??\x:	nrlz.exe
File opened (read-only)	\??\z:	nrlz.exe
File opened (read-only)	\??\m:	nrlz.exe
File opened (read-only)	\??\v:	nrlz.exe
File opened (read-only)	\??\w:	nrlz.exe
File opened (read-only)	\??\y:	nrlz.exe
File opened (read-only)	\??\a:	nrlz.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	nrlz.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral1/memory/3028-13-0x0000000010000000-0x0000000010038000-memory.dmp	upx
behavioral1/files/0x000800000002437e-12.dat	upx
behavioral1/memory/3028-14-0x0000000010000000-0x0000000010038000-memory.dmp	upx
behavioral1/memory/3028-18-0x0000000010000000-0x0000000010038000-memory.dmp	upx

Drops file in Program Files directory 4 IoCs

description	ioc	Process
File opened for modification	\??\c:\Program Files\eyxcpv\nrlz.exe	echno.exe
File opened for modification	\??\c:\Program Files\eyxcpv	echno.exe
File created	\??\c:\Program Files\eyxcpv\nrlzt.dll	echno.exe
File created	\??\c:\Program Files\eyxcpv\nrlz.exe	echno.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	2026-04-19_4a53507f242a2d04c609d47429ef9a06_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	echno.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	nrlz.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
4344	cmd.exe
4484	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	nrlz.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	nrlz.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
4484	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
3028	nrlz.exe
3028	nrlz.exe
3028	nrlz.exe
3028	nrlz.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3028	nrlz.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
4308	2026-04-19_4a53507f242a2d04c609d47429ef9a06_coinminer_elex_wannacry.exe
1972	echno.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 4308 wrote to memory of 4344	4308	2026-04-19_4a53507f242a2d04c609d47429ef9a06_coinminer_elex_wannacry.exe	85
PID 4344 wrote to memory of 4484	4344	cmd.exe	87
PID 4344 wrote to memory of 1972	4344	cmd.exe	88
PID 1972 wrote to memory of 3028	1972	echno.exe	89

C:\Users\Admin\AppData\Local\Temp\2026-04-19_4a53507f242a2d04c609d47429ef9a06_coinminer_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-04-19_4a53507f242a2d04c609d47429ef9a06_coinminer_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4308
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\echno.exe "C:\Users\Admin\AppData\Local\Temp\2026-04-19_4a53507f242a2d04c609d47429ef9a06_coinminer_elex_wannacry.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:4344
- - 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:4484
- - C:\Users\Admin\AppData\Local\Temp\echno.exe
    C:\Users\Admin\AppData\Local\Temp\\echno.exe "C:\Users\Admin\AppData\Local\Temp\2026-04-19_4a53507f242a2d04c609d47429ef9a06_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:1972
  - - \??\c:\Program Files\eyxcpv\nrlz.exe
      "c:\Program Files\eyxcpv\nrlz.exe" "c:\Program Files\eyxcpv\nrlzt.dll",Group C:\Users\Admin\AppData\Local\Temp\echno.exe
      4⤵
      Executes dropped EXE
      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:3028

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

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

Modify Registry

1

T1112

Pre-OS Boot

1

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

1

T1016

Internet Connection Discovery

1

T1016.001

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

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Downloads

nrlz.exe

Path C:\Program Files\eyxcpv\nrlz.exe
Size 60KB
SHA256 6cbe0e1f046b13b29bfa26f8b368281d2dda7eb9b718651d5856f22cc3e02910
MD5 889b99c52a60dd49227c5e485a016679
SHA1 8fa889e456aa646a4d0a4349977430ce5fa5e2d7
SHA512 08933106eaf338dd119c45cbf1f83e723aff77cc0f8d3fc84e36253b1eb31557a54211d1d5d1cb58958188e32064d451f6c66a24b3963cccd3de07299ab90641
SSDEEP 1536:H9ykYCTdiHQKrFXmw2RQln5IUmDjoX6+:HlMHprF2nRQln5I
TLSH
T127532AC2FA00C171D4A7563019778F1A5766AC13DB728ACB94B0B4A41EB3291AD3E5FF
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

nrlzt.dll

Path C:\Program Files\eyxcpv\nrlzt.dll
Size 97KB
SHA256 90e86fee408eebdc70941a3d127161eaa4845a8f12464a019728f613fa09db83
MD5 c284b319010c31e8cbc2e5b37b27c9e6
SHA1 d0c30ab757b53e5dd4991a0256ff57445336ce63
SHA512 023b9c9c9f5777f3844b0733fb112527678ef7ee8d955df218dc2520817506116212bc7d411d4b0216548c3e8d33243510312252325e769b1b917ca9bf3cca8b
SSDEEP 3072:BDpG6gzgHr5tCmfk455ecDBkdq+SStvAbG2:5pG6Sg9txRk/SS6bG2
TLSH
T190A301FA290D7DD6CB354839D6528E35FA29EE348C589F887ECE6C13ACB8510E1641F1
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

echno.exe

Path C:\Users\Admin\AppData\Local\Temp\echno.exe
Size 263KB
SHA256 0e2ad6e57fc357de116c43c5de77d142f22de2842a1e0fc70cee0643652b951f
MD5 0a854f1437cd218a1a17d98c0111892b
SHA1 339ef5d75bc633ac326280cf82db8b9efb238b74
SHA512 542f4544d776b7dc08c9fb4bdae0d40a1e5cc7f92383e7d4e257b0a95d6834aa933bf4a2afda4953651ad79dc1ddba8ff518e64e48a77ad07bc68b7bcd8e8de5
SSDEEP 6144:qtatPE5Txnev1zQBgexOdw6rpI9FsILdu:5PwTNCl+zGp6fk
TLSH
T1FF447C1233E44869E4EA7E32CEB6A630D7FAE9759C33D66F0394430E5E36904CB15366
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/1972-9-0x0000000000910000-0x0000000000A30000-memory.dmp

Download

memory/3028-13-0x0000000010000000-0x0000000010038000-memory.dmp

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memory/3028-14-0x0000000010000000-0x0000000010038000-memory.dmp

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memory/3028-18-0x0000000010000000-0x0000000010038000-memory.dmp

Download

memory/4308-1-0x0000000000A60000-0x0000000000B80000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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