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 3 IoCs

resource	yara_rule
behavioral2/memory/348-11-0x0000000010000000-0x0000000010038000-memory.dmp	family_farfli
behavioral2/memory/348-12-0x0000000010000000-0x0000000010038000-memory.dmp	family_farfli
behavioral2/memory/348-15-0x0000000010000000-0x0000000010038000-memory.dmp	family_farfli

Custom signature

Detects executables containing base64 encoded User Agent 3 IoCs

resource	yara_rule
behavioral2/memory/348-11-0x0000000010000000-0x0000000010038000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/348-12-0x0000000010000000-0x0000000010038000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/348-15-0x0000000010000000-0x0000000010038000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

Custom signature

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/files/0x002600000002b15b-2.dat	UPX
behavioral2/files/0x001a00000002b3ea-8.dat	UPX
behavioral2/memory/348-11-0x0000000010000000-0x0000000010038000-memory.dmp	UPX
behavioral2/memory/348-12-0x0000000010000000-0x0000000010038000-memory.dmp	UPX
behavioral2/memory/348-15-0x0000000010000000-0x0000000010038000-memory.dmp	UPX

Deletes itself 1 IoCs

pid	Process
4800	svwtgib.exe

Executes dropped EXE 2 IoCs

pid	Process
4800	svwtgib.exe
348	tjteuzps.exe

Loads dropped DLL 1 IoCs

pid	Process
348	tjteuzps.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\Vicity = "c:\\Program Files\\ybosigni\\tjteuzps.exe \"c:\\Program Files\\ybosigni\\tjteuzps.dll\",Group"	tjteuzps.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:	tjteuzps.exe
File opened (read-only)	\??\s:	tjteuzps.exe
File opened (read-only)	\??\p:	tjteuzps.exe
File opened (read-only)	\??\u:	tjteuzps.exe
File opened (read-only)	\??\x:	tjteuzps.exe
File opened (read-only)	\??\y:	tjteuzps.exe
File opened (read-only)	\??\a:	tjteuzps.exe
File opened (read-only)	\??\h:	tjteuzps.exe
File opened (read-only)	\??\z:	tjteuzps.exe
File opened (read-only)	\??\b:	tjteuzps.exe
File opened (read-only)	\??\i:	tjteuzps.exe
File opened (read-only)	\??\m:	tjteuzps.exe
File opened (read-only)	\??\q:	tjteuzps.exe
File opened (read-only)	\??\r:	tjteuzps.exe
File opened (read-only)	\??\t:	tjteuzps.exe
File opened (read-only)	\??\v:	tjteuzps.exe
File opened (read-only)	\??\w:	tjteuzps.exe
File opened (read-only)	\??\o:	tjteuzps.exe
File opened (read-only)	\??\e:	tjteuzps.exe
File opened (read-only)	\??\g:	tjteuzps.exe
File opened (read-only)	\??\j:	tjteuzps.exe
File opened (read-only)	\??\k:	tjteuzps.exe
File opened (read-only)	\??\l:	tjteuzps.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	tjteuzps.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/files/0x001a00000002b3ea-8.dat	upx
behavioral2/memory/348-11-0x0000000010000000-0x0000000010038000-memory.dmp	upx
behavioral2/memory/348-12-0x0000000010000000-0x0000000010038000-memory.dmp	upx
behavioral2/memory/348-15-0x0000000010000000-0x0000000010038000-memory.dmp	upx

Drops file in Program Files directory 4 IoCs

description	ioc	Process
File created	\??\c:\Program Files\ybosigni\tjteuzps.dll	svwtgib.exe
File created	\??\c:\Program Files\ybosigni\tjteuzps.exe	svwtgib.exe
File opened for modification	\??\c:\Program Files\ybosigni\tjteuzps.exe	svwtgib.exe
File opened for modification	\??\c:\Program Files\ybosigni	svwtgib.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	PING.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svwtgib.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	tjteuzps.exe
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

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
5084	cmd.exe
420	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	tjteuzps.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	tjteuzps.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
420	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
348	tjteuzps.exe
348	tjteuzps.exe
348	tjteuzps.exe
348	tjteuzps.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	348	tjteuzps.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
1160	2026-04-19_4a53507f242a2d04c609d47429ef9a06_coinminer_elex_wannacry.exe
4800	svwtgib.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1160 wrote to memory of 5084	1160	2026-04-19_4a53507f242a2d04c609d47429ef9a06_coinminer_elex_wannacry.exe	79
PID 5084 wrote to memory of 420	5084	cmd.exe	81
PID 5084 wrote to memory of 4800	5084	cmd.exe	82
PID 4800 wrote to memory of 348	4800	svwtgib.exe	83

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:1160
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\svwtgib.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:5084
- - 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:420
- - C:\Users\Admin\AppData\Local\Temp\svwtgib.exe
    C:\Users\Admin\AppData\Local\Temp\\svwtgib.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:4800
  - - \??\c:\Program Files\ybosigni\tjteuzps.exe
      "c:\Program Files\ybosigni\tjteuzps.exe" "c:\Program Files\ybosigni\tjteuzps.dll",Group C:\Users\Admin\AppData\Local\Temp\svwtgib.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:348

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

Replay Monitor

Loading Replay Monitor...

Downloads

tjteuzps.exe

Path C:\Program Files\ybosigni\tjteuzps.exe
Size 40KB
SHA256 8dcaeeebef9b9f3d41d295db145ffb3850f309d089c08125c7fa7034db5fd80e
MD5 22bb5bd901d8b25ac5b41edbb7d5053e
SHA1 8a935dd8d7e104fc553ff7e8b54a404f7b079334
SHA512 cc3fb68fd6791a08e4a7d1a8db8d07cfcc8c9b9dceec10b53f0cb7ee86473303a19be4f23e379f84c59e02d0568e7c066e21cd1300f6032dac4ba52f609f62e7
SSDEEP 768:C67uhQpPPp0nnqFk509FRdVcQX6N58hJYim1jLP3RRe:C67uhQpXp0nnqa5093jKNAmB3RR
TLSH
T10C134C02BE88C071DDA114B41A5DB337939DED604B1586D3593887EBAA2D3E39E343DE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

svwtgib.exe

Path C:\Users\Admin\AppData\Local\Temp\svwtgib.exe
Size 264KB
SHA256 780a245d41e6c4332238ad20310f40185836cfcf72e38e2d1fdcce87d1a88df4
MD5 e68213b3bef04b0fd7c3ba58d471de6d
SHA1 43b2f0674a0e062eebedb9a6d464e677ffda8e59
SHA512 fc3efac9779aa7013b119a8585c1c309fccc6f0ddf26cec09fdfd3608e0eb09d00c07dc9452b95be5000f24df150d0f8fe5ffabb666dd0f1123249df86643399
SSDEEP 6144:qtatPE5Txnev1zQBgexOdw6rpI9FsILd:5PwTNCl+zGp6f
TLSH
T165447C1233E44869E4EA7E32CEB6A630D7FAE9759C33D66F0394430E5E36904CB15366
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

tjteuzps.dll

Path \??\c:\Program Files\ybosigni\tjteuzps.dll
Size 97KB
SHA256 38a878d4e014b4e4fcc7681da4a1ee59184c0c1ff9460851805831b357741db3
MD5 15a583aab46dec305157da47cb2b996c
SHA1 42b0096f24e831cbe2d4c95d5461b50291663a0c
SHA512 804eb805b6ae817e1d67d9e99ddad3c4ce5ab0e7f57da76795bfcef7a31f0701d5a34f21ac88643e5889530e96859adb6cc87ea91c6b8999b591950eaf8eb018
SSDEEP 3072:BDpG6gzgHr5tCmfk455ecDBkdq+SStvAbG8:5pG6Sg9txRk/SS6bG8
TLSH
T18DA301FA290D7DD6CB354839D6528E35F629EE348C589F887ECE6C13ACB8510E1641F1
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/348-11-0x0000000010000000-0x0000000010038000-memory.dmp

Download

memory/348-12-0x0000000010000000-0x0000000010038000-memory.dmp

Download

memory/348-15-0x0000000010000000-0x0000000010038000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

Replay Monitor

Loading Replay Monitor...

Downloads