farfli | e6671fb8dc7de47f9f320d882b7f7c200f86c67729cef076a23e38010641e01a

Analysis

max time kernel
150s
max time network
138s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260709-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
02/08/2026, 05:40

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General

Target
2026-08-02_a5c60b426e85fa7aa6342d02822287a6_coinminer_elex_wannacry.exe
Size 311KB
Sample260802-gdbe3sdg97
SHA256 e6671fb8dc7de47f9f320d882b7f7c200f86c67729cef076a23e38010641e01a
MD5 a5c60b426e85fa7aa6342d02822287a6
SHA1 c7c1ed1834535ff88a1119f2956cc6db5bd7ab00
SHA512 fc0a7bf49b3b20ba8db5eca00ec2926d6bb35ae36b8928a27a730e3c5654537f4f8bd48e8ecb73347316b7469e5a4dfe60b99549a5a328e3c4496c96dd87ba64
SSDEEP 6144:glYAIeOcaxmlJaErfbMCurC7xS3ZMOBnskyrO:ywLcCmuErglr73aAD+
TLSH
T17164F142D511CF47FC2FCAB6823E1E355317AE553B205693D3C8BA1F65B2B42A63A0D8
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
behavioral2/memory/1784-12-0x0000000010000000-0x0000000010058000-memory.dmp	family_farfli
behavioral2/memory/1784-10-0x0000000010000000-0x0000000010058000-memory.dmp	family_farfli
behavioral2/memory/1784-15-0x0000000010000000-0x0000000010058000-memory.dmp	family_farfli
behavioral2/memory/1784-17-0x0000000010000000-0x0000000010058000-memory.dmp	family_farfli
behavioral2/memory/1784-18-0x0000000010000000-0x0000000010058000-memory.dmp	family_farfli
behavioral2/memory/1784-19-0x0000000010000000-0x0000000010058000-memory.dmp	family_farfli
behavioral2/memory/1784-20-0x0000000010000000-0x0000000010058000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 7 IoCs

resource	yara_rule
behavioral2/memory/1784-12-0x0000000010000000-0x0000000010058000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/1784-10-0x0000000010000000-0x0000000010058000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/1784-15-0x0000000010000000-0x0000000010058000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/1784-17-0x0000000010000000-0x0000000010058000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/1784-18-0x0000000010000000-0x0000000010058000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/1784-19-0x0000000010000000-0x0000000010058000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/1784-20-0x0000000010000000-0x0000000010058000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/3156-0-0x0000000000400000-0x0000000000483000-memory.dmp	UPX
behavioral2/memory/3156-2-0x0000000000400000-0x0000000000483000-memory.dmp	UPX
behavioral2/files/0x001100000001b671-3.dat	UPX
behavioral2/memory/3728-6-0x0000000000400000-0x0000000000483000-memory.dmp	UPX

Badlisted process makes network request 8 IoCs

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

flow	pid	Process
1	1784	rundll32.exe
2	1784	rundll32.exe
3	1784	rundll32.exe
4	1784	rundll32.exe
5	1784	rundll32.exe
6	1784	rundll32.exe
7	1784	rundll32.exe
8	1784	rundll32.exe

Deletes itself 1 IoCs

pid	Process
3728	dshoy.exe

Executes dropped EXE 1 IoCs

pid	Process
3728	dshoy.exe

Loads dropped DLL 1 IoCs

pid	Process
1784	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-1-5-21-3611646547-550105268-947503007-1000\Software\Microsoft\Windows\CurrentVersion\Run\Wetor = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\Program Files\\bycxu\\arbia.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)	\??\n:	rundll32.exe
File opened (read-only)	\??\v:	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)	\??\b:	rundll32.exe
File opened (read-only)	\??\k:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\o:	rundll32.exe
File opened (read-only)	\??\t:	rundll32.exe
File opened (read-only)	\??\x:	rundll32.exe
File opened (read-only)	\??\z:	rundll32.exe
File opened (read-only)	\??\d:	rundll32.exe
File opened (read-only)	\??\g:	rundll32.exe
File opened (read-only)	\??\i:	rundll32.exe
File opened (read-only)	\??\l:	rundll32.exe
File opened (read-only)	\??\p:	rundll32.exe
File opened (read-only)	\??\r:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\h:	rundll32.exe
File opened (read-only)	\??\q:	rundll32.exe
File opened (read-only)	\??\s:	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
behavioral2/memory/3156-0-0x0000000000400000-0x0000000000483000-memory.dmp	upx
behavioral2/memory/3156-2-0x0000000000400000-0x0000000000483000-memory.dmp	upx
behavioral2/files/0x001100000001b671-3.dat	upx
behavioral2/memory/3728-6-0x0000000000400000-0x0000000000483000-memory.dmp	upx

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File opened for modification	\??\c:\Program Files\bycxu	dshoy.exe
File created	\??\c:\Program Files\bycxu\arbia.dll	dshoy.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
4608	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	dshoy.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-08-02_a5c60b426e85fa7aa6342d02822287a6_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
4608	cmd.exe
4516	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 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
4516	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1784	rundll32.exe
1784	rundll32.exe
1784	rundll32.exe
1784	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1784	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
3156	2026-08-02_a5c60b426e85fa7aa6342d02822287a6_coinminer_elex_wannacry.exe
3728	dshoy.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 3156 wrote to memory of 4608	3156	2026-08-02_a5c60b426e85fa7aa6342d02822287a6_coinminer_elex_wannacry.exe	89
PID 4608 wrote to memory of 4516	4608	cmd.exe	91
PID 4608 wrote to memory of 3728	4608	cmd.exe	92
PID 3728 wrote to memory of 1784	3728	dshoy.exe	93

C:\Users\Admin\AppData\Local\Temp\2026-08-02_a5c60b426e85fa7aa6342d02822287a6_coinminer_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-08-02_a5c60b426e85fa7aa6342d02822287a6_coinminer_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3156
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\dshoy.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-02_a5c60b426e85fa7aa6342d02822287a6_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:4608
- - 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:4516
- - C:\Users\Admin\AppData\Local\Temp\dshoy.exe
    C:\Users\Admin\AppData\Local\Temp\\dshoy.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-02_a5c60b426e85fa7aa6342d02822287a6_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:3728
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\Program Files\bycxu\arbia.dll",GetProc C:\Users\Admin\AppData\Local\Temp\dshoy.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:1784

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

dshoy.exe

Path C:\Users\Admin\AppData\Local\Temp\dshoy.exe
Size 311KB
SHA256 25c0a909f2305f9ab5913c4187e9632bb66958f751e5b4f65875d518d66e02c8
MD5 125129fc8aa3fc19f8f466dd7ca64df2
SHA1 bba5f19e7fc314542b465c065972263538aa4cb5
SHA512 ee4ca2bb0fc1ba8dadb022e0c87df992ab615d6b5044fa9526a39fa44452bf9c86a0372687447a2d52dbc39cf1cdb1c65f1cea2a3fb2ae5c19666e1d8e9aeb2d
SSDEEP 6144:glYAIeOcaxmlJaErfbMCurC7xS3ZMOBnskyrO1:ywLcCmuErglr73aAD+a
TLSH
T10E64F142D511CF47FC2FCAB6823E1E355317AE553B205693D3C8BA1F65B2B42A63A0D8
MD5 SHA1 SHA512 SSDEEP TLSH

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arbia.dll

Path \??\c:\Program Files\bycxu\arbia.dll
Size 218KB
SHA256 30d90e071e19a7409624552cd224c20faa32927874ef03a32db60e931f72c859
MD5 70b964fccc909f59210e24b3d04fe1fa
SHA1 fb43a34421fc9961463e517ed9e5119f148dc166
SHA512 1dcf099482771335cff2769cfc73ac0b9a6b08ddfb10c94c8057743e9c3277647e62e7895f2e6a239635ae87df96e60676be36330e1ce5fde9bcdc41607a08f8
SSDEEP 6144:KORxNwD2VOidhzeXwddDzLi5vOQEqscr0ZTJauytb:pnNwDTi3swddDiROXI1
TLSH
T19624128BCF983873C1223379597951A0B9725290AFA1530D92E6D34FA072BA2CF7B535
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/1784-15-0x0000000010000000-0x0000000010058000-memory.dmp

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memory/1784-9-0x0000000010000000-0x0000000010058000-memory.dmp

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memory/1784-14-0x0000000001040000-0x0000000001041000-memory.dmp

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memory/1784-12-0x0000000010000000-0x0000000010058000-memory.dmp

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memory/1784-10-0x0000000010000000-0x0000000010058000-memory.dmp

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memory/1784-17-0x0000000010000000-0x0000000010058000-memory.dmp

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memory/1784-18-0x0000000010000000-0x0000000010058000-memory.dmp

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memory/1784-19-0x0000000010000000-0x0000000010058000-memory.dmp

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memory/1784-20-0x0000000010000000-0x0000000010058000-memory.dmp

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memory/3156-2-0x0000000000400000-0x0000000000483000-memory.dmp

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memory/3156-0-0x0000000000400000-0x0000000000483000-memory.dmp

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memory/3728-6-0x0000000000400000-0x0000000000483000-memory.dmp

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