farfli | 9d0808fb77b7ab0484d37d95609d7b4494bbf53d3c29d9c2416b0b7c424d7804

Analysis

max time kernel
149s
max time network
149s
platform
windows11-21h2_x64
resource
win11-20260513-en
resource tags

arch:x64arch:x86image:win11-20260513-enlocale:en-usos:windows11-21h2-x64systemwindows
submitted
02/06/2026, 03:42

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General

Target
2026-06-02_862918f303cb14cd0a1cb625c55db050_coinminer_elex_wannacry.exe
Size 299KB
Sample260602-d9f4naev6m
SHA256 9d0808fb77b7ab0484d37d95609d7b4494bbf53d3c29d9c2416b0b7c424d7804
MD5 862918f303cb14cd0a1cb625c55db050
SHA1 3b0e6a55783c399d2bcd444cf4afe3033a622855
SHA512 7adc1906cdb496cfa7cd1362aeeabc303e8751c29657aaa02c7f35352fc8d4d8de6b37a35b3e53c78437d4b7f2269db3eb28ee29937eb9f6840a9fefe0831a6a
SSDEEP 6144:glYAIeOcaxmlJaErfbMCurC7xS3ZMOBnskyrO:ywLcCmuErglr73aAD+
TLSH
T12064F182D501CF47FC2FCBB6823E1E251317AF562B205593D3C4B91F65B2692A63E0D9
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 6 IoCs

resource	yara_rule
behavioral2/memory/4924-14-0x0000000010000000-0x0000000010058000-memory.dmp	family_farfli
behavioral2/memory/4924-12-0x0000000010000000-0x0000000010058000-memory.dmp	family_farfli
behavioral2/memory/4924-16-0x0000000010000000-0x0000000010058000-memory.dmp	family_farfli
behavioral2/memory/4924-19-0x0000000010000000-0x0000000010058000-memory.dmp	family_farfli
behavioral2/memory/4924-20-0x0000000010000000-0x0000000010058000-memory.dmp	family_farfli
behavioral2/memory/4924-21-0x0000000010000000-0x0000000010058000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 6 IoCs

resource	yara_rule
behavioral2/memory/4924-14-0x0000000010000000-0x0000000010058000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/4924-12-0x0000000010000000-0x0000000010058000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/4924-16-0x0000000010000000-0x0000000010058000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/4924-19-0x0000000010000000-0x0000000010058000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/4924-20-0x0000000010000000-0x0000000010058000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/4924-21-0x0000000010000000-0x0000000010058000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/2664-0-0x0000000000400000-0x0000000000483000-memory.dmp	UPX
behavioral2/memory/2664-2-0x0000000000400000-0x0000000000483000-memory.dmp	UPX
behavioral2/files/0x000d000000025ad8-4.dat	UPX
behavioral2/memory/1484-7-0x0000000000400000-0x0000000000483000-memory.dmp	UPX

Badlisted process makes network request 8 IoCs

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

flow	pid	Process
1	4924	rundll32.exe
2	4924	rundll32.exe
4	4924	rundll32.exe
5	4924	rundll32.exe
6	4924	rundll32.exe
7	4924	rundll32.exe
8	4924	rundll32.exe
12	4924	rundll32.exe

Deletes itself 1 IoCs

pid	Process
1484	tumzm.exe

Executes dropped EXE 1 IoCs

pid	Process
1484	tumzm.exe

Loads dropped DLL 1 IoCs

pid	Process
4924	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-1-5-21-2746394149-3500112804-1243524366-1000\Software\Microsoft\Windows\CurrentVersion\Run\Wetor = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\Program Files\\ulkgtxp\\gktwg.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)	\??\i:	rundll32.exe
File opened (read-only)	\??\l:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\n:	rundll32.exe
File opened (read-only)	\??\t:	rundll32.exe
File opened (read-only)	\??\y:	rundll32.exe
File opened (read-only)	\??\z:	rundll32.exe
File opened (read-only)	\??\p:	rundll32.exe
File opened (read-only)	\??\s:	rundll32.exe
File opened (read-only)	\??\w:	rundll32.exe
File opened (read-only)	\??\x:	rundll32.exe
File opened (read-only)	\??\g:	rundll32.exe
File opened (read-only)	\??\h:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\k:	rundll32.exe
File opened (read-only)	\??\v:	rundll32.exe
File opened (read-only)	\??\a:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.exe
File opened (read-only)	\??\o:	rundll32.exe
File opened (read-only)	\??\q:	rundll32.exe
File opened (read-only)	\??\r:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\e:	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/2664-0-0x0000000000400000-0x0000000000483000-memory.dmp	upx
behavioral2/memory/2664-2-0x0000000000400000-0x0000000000483000-memory.dmp	upx
behavioral2/files/0x000d000000025ad8-4.dat	upx
behavioral2/memory/1484-7-0x0000000000400000-0x0000000000483000-memory.dmp	upx

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File opened for modification	\??\c:\Program Files\ulkgtxp	tumzm.exe
File created	\??\c:\Program Files\ulkgtxp\gktwg.dll	tumzm.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	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-06-02_862918f303cb14cd0a1cb625c55db050_coinminer_elex_wannacry.exe
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	tumzm.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
4516	cmd.exe
768	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
768	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
4924	rundll32.exe
4924	rundll32.exe
4924	rundll32.exe
4924	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4924	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2664	2026-06-02_862918f303cb14cd0a1cb625c55db050_coinminer_elex_wannacry.exe
1484	tumzm.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2664 wrote to memory of 4516	2664	2026-06-02_862918f303cb14cd0a1cb625c55db050_coinminer_elex_wannacry.exe	80
PID 4516 wrote to memory of 768	4516	cmd.exe	82
PID 4516 wrote to memory of 1484	4516	cmd.exe	83
PID 1484 wrote to memory of 4924	1484	tumzm.exe	84

C:\Users\Admin\AppData\Local\Temp\2026-06-02_862918f303cb14cd0a1cb625c55db050_coinminer_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-06-02_862918f303cb14cd0a1cb625c55db050_coinminer_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2664
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\tumzm.exe "C:\Users\Admin\AppData\Local\Temp\2026-06-02_862918f303cb14cd0a1cb625c55db050_coinminer_elex_wannacry.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:4516
- - 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:768
- - C:\Users\Admin\AppData\Local\Temp\tumzm.exe
    C:\Users\Admin\AppData\Local\Temp\\tumzm.exe "C:\Users\Admin\AppData\Local\Temp\2026-06-02_862918f303cb14cd0a1cb625c55db050_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:1484
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\Program Files\ulkgtxp\gktwg.dll",GetProc C:\Users\Admin\AppData\Local\Temp\tumzm.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:4924

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

tumzm.exe

Path C:\Users\Admin\AppData\Local\Temp\tumzm.exe
Size 300KB
SHA256 4cd7f29489ef91e9d7f8f92987abe8d83b407be294c57678e684e6e93390e0a5
MD5 db4028cb8bec48bf409492c47c3eb85e
SHA1 98f276df0225f561cf2a2e48ac79bc41461cced2
SHA512 7c3231c769f3149355ef7322c73ee8b55aca8b530684d5276d6a0377d5e880a5bfeae98e5ab86a5ffc03738179fc0b69a945f5ce7a8138b48b1a390f4e657227
SSDEEP 6144:glYAIeOcaxmlJaErfbMCurC7xS3ZMOBnskyrOt:ywLcCmuErglr73aAD+A
TLSH
T13764F182D501CF47FC2FCAB6823E1E351317AF552B205593D3C4BA1F65B2A92A63E0D9
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

gktwg.dll

Path \??\c:\Program Files\ulkgtxp\gktwg.dll
Size 218KB
SHA256 7505b00b1e7d9f81ef825cb59520a7b9bd43c4fd841bec505dece3224841cb42
MD5 0a9a497319c352ad531e567613ff1812
SHA1 453d5458e463846e019e26af1eb28b1cb829212c
SHA512 9c21bba1d6a1698e05725ca2fe3a6bb5a083b1e98766d774782e3e47bff4e8abae0e548563876fc66338162aee3b3937fb36ebd40a8c90c46d1df1f2ecb54edf
SSDEEP 6144:KORxNwD2VOidhzeXwddDzLi5vOQEqscr0ZTJauytx:pnNwDTi3swddDiROXI3
TLSH
T10C24128BCF983873C5223379597951A0B9725290AFA1530D93E6D34FA072BA2CF7B531
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/1484-7-0x0000000000400000-0x0000000000483000-memory.dmp

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memory/2664-0-0x0000000000400000-0x0000000000483000-memory.dmp

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memory/2664-2-0x0000000000400000-0x0000000000483000-memory.dmp

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memory/4924-10-0x0000000010000000-0x0000000010058000-memory.dmp

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memory/4924-11-0x0000000000EE0000-0x0000000000EE1000-memory.dmp

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memory/4924-14-0x0000000010000000-0x0000000010058000-memory.dmp

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memory/4924-12-0x0000000010000000-0x0000000010058000-memory.dmp

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memory/4924-16-0x0000000010000000-0x0000000010058000-memory.dmp

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memory/4924-17-0x0000000000EE0000-0x0000000000EE1000-memory.dmp

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memory/4924-19-0x0000000010000000-0x0000000010058000-memory.dmp

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memory/4924-20-0x0000000010000000-0x0000000010058000-memory.dmp

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memory/4924-21-0x0000000010000000-0x0000000010058000-memory.dmp

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