farfli | e8584321871b03cd5efc2cfd6ca7c54d9ab4ba4aee3c76a4936848f3d55a9868

Analysis

max time kernel
150s
max time network
145s
platform
windows11-21h2_x64
resource
win11-20260130-en
resource tags

arch:x64arch:x86image:win11-20260130-enlocale:en-usos:windows11-21h2-x64systemwindows
submitted
15/04/2026, 05:03

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General

Target
2026-04-15_d9a4bce1f0f01369918a07c2699a479c_elex_wannacry.exe
Size 163KB
Sample260415-fp5bvsav31
SHA256 e8584321871b03cd5efc2cfd6ca7c54d9ab4ba4aee3c76a4936848f3d55a9868
MD5 d9a4bce1f0f01369918a07c2699a479c
SHA1 cb022d4ac08e49b9b4dfeb7f6b53c4a56a41fc0d
SHA512 7b2511c35ce055ac2103a0334e0199456e48a51d9f2988d01c714f440d5518087ffd41c5c7cd9b8bc02e6960de6d7d17fdbd40c3a332d807684c4a5d3bcce68c
SSDEEP 3072:KK4RNx65b4RoIwZpx10ZENfrGSQ7sDU/ySkNAqU:Kl65xiZuKoDkySkNAt
TLSH
T184F3CF8A5B7ACBDBE1112C74E2A816F34252DC9CEB1453678388FE4FF832D919C36165
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

backdoor bootkit discovery farfli persistence spyware stealer

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/5480-13-0x0000000010000000-0x000000001002E000-memory.dmp	family_farfli
behavioral2/memory/5480-14-0x0000000010000000-0x000000001002E000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 2 IoCs

resource	yara_rule
behavioral2/memory/5480-13-0x0000000010000000-0x000000001002E000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/5480-14-0x0000000010000000-0x000000001002E000-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	5480	rundll32.exe
3	5480	rundll32.exe
4	5480	rundll32.exe
5	5480	rundll32.exe
6	5480	rundll32.exe
8	5480	rundll32.exe
10	5480	rundll32.exe
11	5480	rundll32.exe

Deletes itself 1 IoCs

pid	Process
6136	koldfcqq.exe

Executes dropped EXE 1 IoCs

pid	Process
6136	koldfcqq.exe

Loads dropped DLL 1 IoCs

pid	Process
5480	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-1-5-21-2397528088-2630719772-1129911217-1000\Software\Microsoft\Windows\CurrentVersion\Run\EvtMgr = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\seywg\\rllqv.dll\",init"	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)	\??\a:	rundll32.exe
File opened (read-only)	\??\e:	rundll32.exe
File opened (read-only)	\??\g:	rundll32.exe
File opened (read-only)	\??\i:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\s:	rundll32.exe
File opened (read-only)	\??\x:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\r:	rundll32.exe
File opened (read-only)	\??\v:	rundll32.exe
File opened (read-only)	\??\w:	rundll32.exe
File opened (read-only)	\??\q:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.exe
File opened (read-only)	\??\k:	rundll32.exe
File opened (read-only)	\??\n:	rundll32.exe
File opened (read-only)	\??\t:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\z:	rundll32.exe
File opened (read-only)	\??\h:	rundll32.exe
File opened (read-only)	\??\l:	rundll32.exe
File opened (read-only)	\??\o:	rundll32.exe
File opened (read-only)	\??\y:	rundll32.exe
File opened (read-only)	\??\p:	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

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	koldfcqq.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-04-15_d9a4bce1f0f01369918a07c2699a479c_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
3384	cmd.exe
5444	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
5444	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
5480	rundll32.exe
5480	rundll32.exe
5480	rundll32.exe
5480	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	5480	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
1452	2026-04-15_d9a4bce1f0f01369918a07c2699a479c_elex_wannacry.exe
6136	koldfcqq.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1452 wrote to memory of 3384	1452	2026-04-15_d9a4bce1f0f01369918a07c2699a479c_elex_wannacry.exe	79
PID 3384 wrote to memory of 5444	3384	cmd.exe	81
PID 3384 wrote to memory of 6136	3384	cmd.exe	82
PID 6136 wrote to memory of 5480	6136	koldfcqq.exe	83

C:\Users\Admin\AppData\Local\Temp\2026-04-15_d9a4bce1f0f01369918a07c2699a479c_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-04-15_d9a4bce1f0f01369918a07c2699a479c_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1452
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&c:\koldfcqq.exe "C:\Users\Admin\AppData\Local\Temp\2026-04-15_d9a4bce1f0f01369918a07c2699a479c_elex_wannacry.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:3384
- - 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:5444
- - \??\c:\koldfcqq.exe
    c:\koldfcqq.exe "C:\Users\Admin\AppData\Local\Temp\2026-04-15_d9a4bce1f0f01369918a07c2699a479c_elex_wannacry.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:6136
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\seywg\rllqv.dll",init c:\koldfcqq.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:5480

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

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

koldfcqq.exe

Path C:\koldfcqq.exe
Size 163KB
SHA256 1c76b63c0d6f6a5b4b1a5bc76a792371b2b13488c4a3829cd69e72974044bd7f
MD5 8d23931e95319374eae60b5384507a23
SHA1 ef429c2f67014161f041b00edc345cec27ced3d7
SHA512 4022e8ae10779c5a3966dfffe9c14d2db5cb43a75d4f0278d4f827c15ae51bd027360ecd7d6004ac77737784ea1ba487b692f070adbe35b76b0f9b2b93b79efb
SSDEEP 3072:KK4RNx65b4RoIwZpx10ZENfrGSQ7sDU/ySkNAq4:Kl65xiZuKoDkySkNAf
TLSH
T19CF3CF8A5B7ACBDBE1112C74E2A816F34252DC9CEB1453678388FE4FF832D919C36165
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

rllqv.dll

Path \??\c:\seywg\rllqv.dll
Size 42KB
SHA256 c7c41689de030df0f78f471422fa2a6383b36e77c94e7f6f124a96feb3e27ed7
MD5 36e3fb5964d663272cf1169e1e1ca478
SHA1 58115e08b49505bcbbb5c88a28a86222ba18d5d4
SHA512 daff53b11aa400437a06287707a334a09661c1ef7d0fd8beaf1a874c79c16fe45bd1188343d0623e839d3ead5ea2dd90896e37ccf3b252c7220c74989a9ba442
SSDEEP 768:t0inj1jJ5OeUMhBNSqHvMjjAipMkuG30sv2xEZkWldADAKPIp:t0ipV5uMhBt0jjAiusv22ZkWTOAKP8
TLSH
T1D813E19B6BEC7029FDD22BB4F4F66815EEB63F388CB2C70E114941AB1C3A9D51251706
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/1452-0-0x0000000000400000-0x0000000000426000-memory.dmp

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memory/1452-2-0x0000000000400000-0x0000000000426000-memory.dmp

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memory/5480-11-0x0000000010000000-0x000000001002E000-memory.dmp

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memory/5480-12-0x0000000002D60000-0x0000000002D61000-memory.dmp

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memory/5480-13-0x0000000010000000-0x000000001002E000-memory.dmp

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memory/5480-14-0x0000000010000000-0x000000001002E000-memory.dmp

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memory/5480-16-0x0000000002D60000-0x0000000002D61000-memory.dmp

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memory/5480-15-0x0000000003E10000-0x0000000003E74000-memory.dmp

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memory/6136-6-0x0000000000400000-0x0000000000426000-memory.dmp

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memory/6136-8-0x0000000000400000-0x0000000000426000-memory.dmp

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