farfli | 8f1d9de7411f130c1869161fd0da56b43d440bdd61ad9d953b5a3bd690a0a679

Analysis

max time kernel
149s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20260513-en
resource tags

arch:x64arch:x86image:win10v2004-20260513-enlocale:en-usos:windows10-2004-x64systemwindows
submitted
02/08/2026, 11:02

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General

Target
2026-08-02_a9514e3b1e7282f27aadc02e7bd35215_coinminer_elex_wannacry.exe
Size 311KB
Sample260802-m5ff1aha74
SHA256 8f1d9de7411f130c1869161fd0da56b43d440bdd61ad9d953b5a3bd690a0a679
MD5 a9514e3b1e7282f27aadc02e7bd35215
SHA1 ad7d4ebccc32d21772efa824d99a3352bb49156b
SHA512 91cdc808b42a476c068e6206e287477b5b77589bdb93b4997693664c70c01e9222fe7984765b28c08bffc5236292cdc7177d57eb53efc19d4fc9769469f9acb0
SSDEEP 6144:glYAIeOcaxmlJaErfbMCurC7xS3ZMOBnskyrOU:ywLcCmuErglr73aAD+v
TLSH
T18B64F142D511CF47FC2FCAB6823E1E355317AE553B205693D3C8BA1F65B2B42A63A0D8
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

backdoor bootkit 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 7 IoCs

resource	yara_rule
behavioral1/memory/1836-14-0x0000000010000000-0x0000000010058000-memory.dmp	family_farfli
behavioral1/memory/1836-11-0x0000000010000000-0x0000000010058000-memory.dmp	family_farfli
behavioral1/memory/1836-16-0x0000000010000000-0x0000000010058000-memory.dmp	family_farfli
behavioral1/memory/1836-18-0x0000000010000000-0x0000000010058000-memory.dmp	family_farfli
behavioral1/memory/1836-19-0x0000000010000000-0x0000000010058000-memory.dmp	family_farfli
behavioral1/memory/1836-20-0x0000000010000000-0x0000000010058000-memory.dmp	family_farfli
behavioral1/memory/1836-21-0x0000000010000000-0x0000000010058000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 7 IoCs

resource	yara_rule
behavioral1/memory/1836-14-0x0000000010000000-0x0000000010058000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/1836-11-0x0000000010000000-0x0000000010058000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/1836-16-0x0000000010000000-0x0000000010058000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/1836-18-0x0000000010000000-0x0000000010058000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/1836-19-0x0000000010000000-0x0000000010058000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/1836-20-0x0000000010000000-0x0000000010058000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/1836-21-0x0000000010000000-0x0000000010058000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral1/memory/3676-0-0x0000000000400000-0x0000000000483000-memory.dmp	UPX
behavioral1/memory/3676-2-0x0000000000400000-0x0000000000483000-memory.dmp	UPX
behavioral1/files/0x000800000002293a-5.dat	UPX
behavioral1/memory/1132-7-0x0000000000400000-0x0000000000483000-memory.dmp	UPX

Badlisted process makes network request 8 IoCs

Network request originating from process or tool commonly abused by malware.

flow	pid	Process
5	1836	rundll32.exe
32	1836	rundll32.exe
37	1836	rundll32.exe
38	1836	rundll32.exe
62	1836	rundll32.exe
79	1836	rundll32.exe
94	1836	rundll32.exe
104	1836	rundll32.exe

Deletes itself 1 IoCs

pid	Process
1132	rpgrx.exe

Executes dropped EXE 1 IoCs

pid	Process
1132	rpgrx.exe

Loads dropped DLL 1 IoCs

pid	Process
1836	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-1-5-21-876885714-46325919-1482798410-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Wetor = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\Program Files\\mloje\\dfvyir.dll\",GetProc"	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)	\??\y:	rundll32.exe
File opened (read-only)	\??\g:	rundll32.exe
File opened (read-only)	\??\q:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\w:	rundll32.exe
File opened (read-only)	\??\x:	rundll32.exe
File opened (read-only)	\??\k:	rundll32.exe
File opened (read-only)	\??\l:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\o:	rundll32.exe
File opened (read-only)	\??\s:	rundll32.exe
File opened (read-only)	\??\t:	rundll32.exe
File opened (read-only)	\??\h:	rundll32.exe
File opened (read-only)	\??\i:	rundll32.exe
File opened (read-only)	\??\n:	rundll32.exe
File opened (read-only)	\??\r:	rundll32.exe
File opened (read-only)	\??\v:	rundll32.exe
File opened (read-only)	\??\z:	rundll32.exe
File opened (read-only)	\??\p:	rundll32.exe
File opened (read-only)	\??\a:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.exe
File opened (read-only)	\??\e:	rundll32.exe
File opened (read-only)	\??\j:	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

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral1/memory/3676-0-0x0000000000400000-0x0000000000483000-memory.dmp	upx
behavioral1/memory/3676-2-0x0000000000400000-0x0000000000483000-memory.dmp	upx
behavioral1/files/0x000800000002293a-5.dat	upx
behavioral1/memory/1132-7-0x0000000000400000-0x0000000000483000-memory.dmp	upx

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File created	\??\c:\Program Files\mloje\dfvyir.dll	rpgrx.exe
File opened for modification	\??\c:\Program Files\mloje	rpgrx.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
5000	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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PING.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rpgrx.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-08-02_a9514e3b1e7282f27aadc02e7bd35215_coinminer_elex_wannacry.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
5000	cmd.exe
3912	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
3912	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1836	rundll32.exe
1836	rundll32.exe
1836	rundll32.exe
1836	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1836	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
3676	2026-08-02_a9514e3b1e7282f27aadc02e7bd35215_coinminer_elex_wannacry.exe
1132	rpgrx.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 3676 wrote to memory of 5000	3676	2026-08-02_a9514e3b1e7282f27aadc02e7bd35215_coinminer_elex_wannacry.exe	85
PID 5000 wrote to memory of 3912	5000	cmd.exe	87
PID 5000 wrote to memory of 1132	5000	cmd.exe	88
PID 1132 wrote to memory of 1836	1132	rpgrx.exe	89

C:\Users\Admin\AppData\Local\Temp\2026-08-02_a9514e3b1e7282f27aadc02e7bd35215_coinminer_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-08-02_a9514e3b1e7282f27aadc02e7bd35215_coinminer_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3676
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\rpgrx.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-02_a9514e3b1e7282f27aadc02e7bd35215_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:5000
- - 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:3912
- - C:\Users\Admin\AppData\Local\Temp\rpgrx.exe
    C:\Users\Admin\AppData\Local\Temp\\rpgrx.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-02_a9514e3b1e7282f27aadc02e7bd35215_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:1132
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\Program Files\mloje\dfvyir.dll",GetProc C:\Users\Admin\AppData\Local\Temp\rpgrx.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:1836

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

rpgrx.exe

Path C:\Users\Admin\AppData\Local\Temp\rpgrx.exe
Size 311KB
SHA256 cb25f7e2bf389afeef3090049d2e3aadcf73ff5f264b8e83366997ea98392d23
MD5 e0f5e0ff89e456153985304058108646
SHA1 d325479e919d845af01875f201dba99610721195
SHA512 365746a0e7e4f984da7822b83681abc4de91c9442390a0a89e4821da40e7e16492504b76ec12d80da4c1e6b87b5f8e9830ce7d006ede4309aa593648ee190d2a
SSDEEP 6144:glYAIeOcaxmlJaErfbMCurC7xS3ZMOBnskyrOV:ywLcCmuErglr73aAD+S
TLSH
T1FB64F142D511CF47FC2FCAB6823E1E355317AE553B205693D3C8BA1F65B2B42A63A0D8
MD5 SHA1 SHA512 SSDEEP TLSH

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dfvyir.dll

Path \??\c:\Program Files\mloje\dfvyir.dll
Size 218KB
SHA256 663f6c5c963115ece57109a9f3748171f8020af8b0a1de82a68ce514185292cc
MD5 b679d2fcbf008c60cf3b919ebc0ab472
SHA1 1cfedcbe4f2b3af7b57e4f46c46f011e230878cf
SHA512 b138b2e3c4f45e17184be2607f5d43da70d076757b42712f56a9b800aaa403907fb211f8eead414824d4dc28af581554128c7b2b2e78b61fbdf48478e06dd7d1
SSDEEP 6144:KORxNwD2VOidhzeXwddDzLi5vOQEqscr0ZTJauyt9:pnNwDTi3swddDiROXI/
TLSH
T168241287CF983873C5223379597911A0BA725290AFA1534DD2E6D34FA072BA2CF7B531
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/1132-7-0x0000000000400000-0x0000000000483000-memory.dmp

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memory/1836-14-0x0000000010000000-0x0000000010058000-memory.dmp

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memory/1836-10-0x0000000010000000-0x0000000010058000-memory.dmp

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memory/1836-13-0x0000000000A80000-0x0000000000A81000-memory.dmp

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memory/1836-11-0x0000000010000000-0x0000000010058000-memory.dmp

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memory/1836-16-0x0000000010000000-0x0000000010058000-memory.dmp

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memory/1836-18-0x0000000010000000-0x0000000010058000-memory.dmp

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memory/1836-19-0x0000000010000000-0x0000000010058000-memory.dmp

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memory/1836-20-0x0000000010000000-0x0000000010058000-memory.dmp

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memory/1836-21-0x0000000010000000-0x0000000010058000-memory.dmp

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memory/3676-2-0x0000000000400000-0x0000000000483000-memory.dmp

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memory/3676-0-0x0000000000400000-0x0000000000483000-memory.dmp

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