farfli | e8cf6417a6c2aef808e322f5f81d1c37c46bb520e9a196aa619ef55a878728b6

General

Target
2026-06-02_90cb990bd5d21421546e4c69405b0e2f_elex_wannacry.exe
Size 122KB
Sample260602-eevt1aew8m
SHA256 e8cf6417a6c2aef808e322f5f81d1c37c46bb520e9a196aa619ef55a878728b6
MD5 90cb990bd5d21421546e4c69405b0e2f
SHA1 ab295fd63c0325d5ac6ff3976e2425758694ef3a
SHA512 010803ca583324af6cf1226ad6364bb8d0f6dc24b1743d368df51c35e1620b88cf66f407045e9d1e656682dda18ba152c4b6bb63db73745ce89e68b55da6b3e9
SSDEEP 1536:f/6EkrKHqgGFs5N6s7H3dPT+X/O3DX6HZ9am1AEgHZ5bdpDvkDBlxZP1n:fSKP3Pe/Oz67aKVgbbdpDcljZ9n
TLSH
T149C3C0527A6085F0E01645335397AB318771EC1E3A1813EE93C8FE0FBD65625ECBB299
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
behavioral2/memory/676-11-0x0000000010000000-0x0000000010030000-memory.dmp	family_farfli
behavioral2/memory/676-12-0x0000000010000000-0x0000000010030000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 2 IoCs

resource	yara_rule
behavioral2/memory/676-11-0x0000000010000000-0x0000000010030000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/676-12-0x0000000010000000-0x0000000010030000-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
2	676	rundll32.exe
3	676	rundll32.exe
4	676	rundll32.exe
5	676	rundll32.exe
6	676	rundll32.exe
8	676	rundll32.exe
10	676	rundll32.exe
11	676	rundll32.exe

Deletes itself 1 IoCs

pid	Process
2220	mefmv.exe

Executes dropped EXE 1 IoCs

pid	Process
2220	mefmv.exe

Loads dropped DLL 1 IoCs

pid	Process
676	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-1-5-21-2824035265-2271499813-2042964211-1000\Software\Microsoft\Windows\CurrentVersion\Run\EvtMgr = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\dkiuohd\\izxlq.dll\",QueryPluginInterface"	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)	\??\e:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\a:	rundll32.exe
File opened (read-only)	\??\g:	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)	\??\r:	rundll32.exe
File opened (read-only)	\??\w:	rundll32.exe
File opened (read-only)	\??\z:	rundll32.exe
File opened (read-only)	\??\i:	rundll32.exe
File opened (read-only)	\??\n:	rundll32.exe
File opened (read-only)	\??\q:	rundll32.exe
File opened (read-only)	\??\s:	rundll32.exe
File opened (read-only)	\??\t:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.exe
File opened (read-only)	\??\h:	rundll32.exe
File opened (read-only)	\??\k:	rundll32.exe
File opened (read-only)	\??\p:	rundll32.exe
File opened (read-only)	\??\v:	rundll32.exe
File opened (read-only)	\??\x:	rundll32.exe
File opened (read-only)	\??\y:	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 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2464-0-0x0000000000400000-0x000000000041E000-memory.dmp	upx
behavioral2/memory/2464-2-0x0000000000400000-0x000000000041E000-memory.dmp	upx
behavioral2/files/0x00170000000256ca-4.dat	upx
behavioral2/memory/2220-6-0x0000000000400000-0x000000000041E000-memory.dmp	upx
behavioral2/memory/2220-8-0x0000000000400000-0x000000000041E000-memory.dmp	upx

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	mefmv.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-06-02_90cb990bd5d21421546e4c69405b0e2f_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
1724	PING.EXE
4120	cmd.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
1724	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
676	rundll32.exe
676	rundll32.exe
676	rundll32.exe
676	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	676	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2464	2026-06-02_90cb990bd5d21421546e4c69405b0e2f_elex_wannacry.exe
2220	mefmv.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2464 wrote to memory of 4120	2464	2026-06-02_90cb990bd5d21421546e4c69405b0e2f_elex_wannacry.exe	81
PID 4120 wrote to memory of 1724	4120	cmd.exe	83
PID 4120 wrote to memory of 2220	4120	cmd.exe	84
PID 2220 wrote to memory of 676	2220	mefmv.exe	85

C:\Users\Admin\AppData\Local\Temp\2026-06-02_90cb990bd5d21421546e4c69405b0e2f_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-06-02_90cb990bd5d21421546e4c69405b0e2f_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2464
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\mefmv.exe "C:\Users\Admin\AppData\Local\Temp\2026-06-02_90cb990bd5d21421546e4c69405b0e2f_elex_wannacry.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:4120
- - 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:1724
- - C:\Users\Admin\AppData\Local\Temp\mefmv.exe
    C:\Users\Admin\AppData\Local\Temp\\mefmv.exe "C:\Users\Admin\AppData\Local\Temp\2026-06-02_90cb990bd5d21421546e4c69405b0e2f_elex_wannacry.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:2220
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\dkiuohd\izxlq.dll",QueryPluginInterface C:\Users\Admin\AppData\Local\Temp\mefmv.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:676

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

mefmv.exe

Path C:\Users\Admin\AppData\Local\Temp\mefmv.exe
Size 123KB
SHA256 202d4e867ddb0bf14eeaa9576bf1093d5bae3ed446390021415bc88d8046c1e3
MD5 d877a4dc5a9054da9947bde26ef9d31b
SHA1 60340c57cae2f84f099369c0579aaefcd45aeb6e
SHA512 6650a9a91ae4dc4aa9b7006d19bbf29c542ff454b98c7e97ad259cdf59e26c45e73611cc5cb42c817ef071b2ff0567cf187515cd7d28f724d49ace9818133868
SSDEEP 1536:f/6EkrKHqgGFs5N6s7H3dPT+X/O3DX6HZ9am1AEgHZ5bdpDvkDBlxZP1nb:fSKP3Pe/Oz67aKVgbbdpDcljZ9nb
TLSH
T12AC3BF527A6085F0E01645335397AB318771EC1E3A1813EE93C8FE0FBD65625ECBB299
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

izxlq.dll

Path \??\c:\dkiuohd\izxlq.dll
Size 59KB
SHA256 12264670242948b129acc4d9cd80cdf83fac88e662c09a57ce5ac6b39510618d
MD5 8552951ec6ab253e038ffc809235b08c
SHA1 c59e347bfebd96c0e4b60a0d33b5923fb137af55
SHA512 17864dfff89f397c647ec02926cfd639e33a05061cb6164756afd3d8c4e24281cba9c4770d16927ba56e1e02a139faf970748bfe07454f4528eab9f87e2c0cd9
SSDEEP 1536:x0u5H+DyujZ2uoHzCf/IYmRGMJnc7Z4ch:x04eDyY/oH8SIMJncNnh
TLSH
T12843F21CE351855BDAAB0672678F6F407A238A7F5B32485A914C2454BF3BE77C937380
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/676-11-0x0000000010000000-0x0000000010030000-memory.dmp

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memory/676-12-0x0000000010000000-0x0000000010030000-memory.dmp

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memory/2220-6-0x0000000000400000-0x000000000041E000-memory.dmp

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memory/2220-8-0x0000000000400000-0x000000000041E000-memory.dmp

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memory/2464-0-0x0000000000400000-0x000000000041E000-memory.dmp

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memory/2464-2-0x0000000000400000-0x000000000041E000-memory.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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