farfli | 25158d9e552906fd1641738f7515b96090801d2f17885646f9ea15d7cd0449d2

Analysis

max time kernel
149s
max time network
147s
platform
windows10-2004_x64
resource
win10v2004-20260513-en
resource tags

arch:x64arch:x86image:win10v2004-20260513-enlocale:en-usos:windows10-2004-x64systemwindows
submitted
06/08/2026, 11:06

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General

Target
2026-08-06_e23e08f3c99348c1458602af62843cde_coinminer_elex_wannacry.exe
Size 312KB
Sample260806-m7lqsshc63
SHA256 25158d9e552906fd1641738f7515b96090801d2f17885646f9ea15d7cd0449d2
MD5 e23e08f3c99348c1458602af62843cde
SHA1 6e6620c8ab643e47276adee7731fdae433050e57
SHA512 0ee650afbd7e34bdd1c8893f73b7524984b187b885a96c1f4d51cb8e8378df72da0311cb94e121ef30383819ce70da134f135952f6d68d4e5265b100739ee4c4
SSDEEP 6144:glYAIeOcaxmlJaErfbMCurC7xS3ZMOBnskyrO:ywLcCmuErglr73aAD+
TLSH
T13164F142D511CF47FC2FCAB6823E1E355317AE553B205693D3C8BA1F65B2B42A63A0D8
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 6 IoCs

resource	yara_rule
behavioral1/memory/4740-11-0x0000000010000000-0x0000000010058000-memory.dmp	family_farfli
behavioral1/memory/4740-14-0x0000000010000000-0x0000000010058000-memory.dmp	family_farfli
behavioral1/memory/4740-16-0x0000000010000000-0x0000000010058000-memory.dmp	family_farfli
behavioral1/memory/4740-18-0x0000000010000000-0x0000000010058000-memory.dmp	family_farfli
behavioral1/memory/4740-20-0x0000000010000000-0x0000000010058000-memory.dmp	family_farfli
behavioral1/memory/4740-21-0x0000000010000000-0x0000000010058000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 6 IoCs

resource	yara_rule
behavioral1/memory/4740-11-0x0000000010000000-0x0000000010058000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/4740-14-0x0000000010000000-0x0000000010058000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/4740-16-0x0000000010000000-0x0000000010058000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/4740-18-0x0000000010000000-0x0000000010058000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/4740-20-0x0000000010000000-0x0000000010058000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/4740-21-0x0000000010000000-0x0000000010058000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral1/memory/3556-0-0x0000000000400000-0x0000000000483000-memory.dmp	UPX
behavioral1/memory/3556-2-0x0000000000400000-0x0000000000483000-memory.dmp	UPX
behavioral1/files/0x000a000000024248-4.dat	UPX
behavioral1/memory/1968-7-0x0000000000400000-0x0000000000483000-memory.dmp	UPX

Badlisted process makes network request 8 IoCs

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

flow	pid	Process
6	4740	rundll32.exe
32	4740	rundll32.exe
33	4740	rundll32.exe
34	4740	rundll32.exe
44	4740	rundll32.exe
47	4740	rundll32.exe
52	4740	rundll32.exe
60	4740	rundll32.exe

Deletes itself 1 IoCs

pid	Process
1968	qjcbc.exe

Executes dropped EXE 1 IoCs

pid	Process
1968	qjcbc.exe

Loads dropped DLL 1 IoCs

pid	Process
4740	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-1-5-21-889581200-2041691093-2048517887-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Wetor = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\Program Files\\jjuezadf\\muwrln.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)	\??\e:	rundll32.exe
File opened (read-only)	\??\g:	rundll32.exe
File opened (read-only)	\??\k:	rundll32.exe
File opened (read-only)	\??\n:	rundll32.exe
File opened (read-only)	\??\o:	rundll32.exe
File opened (read-only)	\??\p:	rundll32.exe
File opened (read-only)	\??\s:	rundll32.exe
File opened (read-only)	\??\z:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.exe
File opened (read-only)	\??\h:	rundll32.exe
File opened (read-only)	\??\x:	rundll32.exe
File opened (read-only)	\??\i:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\q:	rundll32.exe
File opened (read-only)	\??\r:	rundll32.exe
File opened (read-only)	\??\t:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\w:	rundll32.exe
File opened (read-only)	\??\y:	rundll32.exe
File opened (read-only)	\??\a:	rundll32.exe
File opened (read-only)	\??\l:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\v:	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/3556-0-0x0000000000400000-0x0000000000483000-memory.dmp	upx
behavioral1/memory/3556-2-0x0000000000400000-0x0000000000483000-memory.dmp	upx
behavioral1/files/0x000a000000024248-4.dat	upx
behavioral1/memory/1968-7-0x0000000000400000-0x0000000000483000-memory.dmp	upx

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File opened for modification	\??\c:\Program Files\jjuezadf	qjcbc.exe
File created	\??\c:\Program Files\jjuezadf\muwrln.dll	qjcbc.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
680	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	PING.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	qjcbc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-08-06_e23e08f3c99348c1458602af62843cde_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
4352	PING.EXE
680	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 value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	rundll32.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	rundll32.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
4352	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
4740	rundll32.exe
4740	rundll32.exe
4740	rundll32.exe
4740	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4740	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
3556	2026-08-06_e23e08f3c99348c1458602af62843cde_coinminer_elex_wannacry.exe
1968	qjcbc.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 3556 wrote to memory of 680	3556	2026-08-06_e23e08f3c99348c1458602af62843cde_coinminer_elex_wannacry.exe	84
PID 680 wrote to memory of 4352	680	cmd.exe	86
PID 680 wrote to memory of 1968	680	cmd.exe	88
PID 1968 wrote to memory of 4740	1968	qjcbc.exe	89

C:\Users\Admin\AppData\Local\Temp\2026-08-06_e23e08f3c99348c1458602af62843cde_coinminer_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-08-06_e23e08f3c99348c1458602af62843cde_coinminer_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3556
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\qjcbc.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-06_e23e08f3c99348c1458602af62843cde_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:680
- - 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:4352
- - C:\Users\Admin\AppData\Local\Temp\qjcbc.exe
    C:\Users\Admin\AppData\Local\Temp\\qjcbc.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-06_e23e08f3c99348c1458602af62843cde_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:1968
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\Program Files\jjuezadf\muwrln.dll",GetProc C:\Users\Admin\AppData\Local\Temp\qjcbc.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:4740

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

qjcbc.exe

Path C:\Users\Admin\AppData\Local\Temp\qjcbc.exe
Size 312KB
SHA256 28d7c293babc56cec318f24d958c8bae886d1423031cf7e99b1bef66c9b9f6b7
MD5 1a0849a302698804423ea4f6f19241fe
SHA1 86490b2d0a4c8037cd7c7d5eaf50059f0c2a8828
SHA512 b4e4d389c3fd01aa2c56323c698d4a50b3de8ee8fe66cf59035562ffe0a7305f716c8d8ad9dda84ca23e7b14551425e11a8803c6327fed7ba5f08ea356bf39cc
SSDEEP 6144:glYAIeOcaxmlJaErfbMCurC7xS3ZMOBnskyrOn:ywLcCmuErglr73aAD+w
TLSH
T11464F141D511CF47FC2FCAB5823E0E355317AE153B205663D3C8BA1FA5B2B42A63A0D8
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

muwrln.dll

Path \??\c:\Program Files\jjuezadf\muwrln.dll
Size 218KB
SHA256 a6ffc267012ceaa2ec3cbe142ced99c53ad57ce036bd9df00bc39e58f3100515
MD5 e773774d17d1cf95303ef60a75e8f028
SHA1 979c5734c982464b7936079bd33490c465460d5d
SHA512 7e10fb2fa116dfe889e6192b653b65a949d8f4edd806efc3b903e3712a07e586ac56d2cc0960ac86060de712863c4ed41cf5c23e8df9b1b8356325d3ffcec5c9
SSDEEP 6144:KORxNwD2VOidhzeXwddDzLi5vOQEqscr0ZTJauytD:pnNwDTi3swddDiROXI9
TLSH
T1D024124BCF983873C5223379597911A0B97242909FA1934DD2E6D34FA072BA2CF7B531
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/1968-7-0x0000000000400000-0x0000000000483000-memory.dmp

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memory/3556-0-0x0000000000400000-0x0000000000483000-memory.dmp

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memory/3556-2-0x0000000000400000-0x0000000000483000-memory.dmp

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memory/4740-11-0x0000000010000000-0x0000000010058000-memory.dmp

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memory/4740-10-0x0000000010000000-0x0000000010058000-memory.dmp

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memory/4740-13-0x0000000001050000-0x0000000001051000-memory.dmp

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memory/4740-14-0x0000000010000000-0x0000000010058000-memory.dmp

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memory/4740-16-0x0000000010000000-0x0000000010058000-memory.dmp

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memory/4740-18-0x0000000010000000-0x0000000010058000-memory.dmp

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memory/4740-20-0x0000000010000000-0x0000000010058000-memory.dmp

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memory/4740-21-0x0000000010000000-0x0000000010058000-memory.dmp

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