farfli | a8a59130a72af8400482b7bc129eb307bc8250c09131d9863c4e95dbb2e01202

Analysis

max time kernel
149s
max time network
137s
platform
windows11-21h2_x64
resource
win11-20260130-en
resource tags

arch:x64arch:x86image:win11-20260130-enlocale:en-usos:windows11-21h2-x64systemwindows
submitted
17/04/2026, 18:11

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General

Target
2026-04-17_482726e84868e1790e74f2cedd7294ef_coinminer_elex_wannacry.exe
Size 150KB
Sample260417-wstyasey9j
SHA256 a8a59130a72af8400482b7bc129eb307bc8250c09131d9863c4e95dbb2e01202
MD5 482726e84868e1790e74f2cedd7294ef
SHA1 73d96b772461e33cad4c4970f691652b725e751d
SHA512 b0a1ad49c3d10c6687a1b71253c0849f418d2fe290782dcabd6dc15dc6f1434315a71e9cb049ce63fdb5da901cb4e030d95c2ce167e8a4fdc141f2cbdbfb1796
SSDEEP 1536:B3aacz2htqkUla/NGVcJ/gAqcX0JMseuiGSeNVvDi0tMuUJJny3GM+9qKv:Ua/qc9rqzMseNoVv9EJFnM8qKv
TLSH
T197E3370267F6C194F0B31E34CA3646F08BA6BC69FA70921B17847E4EBD31A15ED21776
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 4 IoCs

resource	yara_rule
behavioral2/memory/1360-11-0x0000000010001000-0x0000000010021000-memory.dmp	family_farfli
behavioral2/memory/1360-10-0x0000000010000000-0x0000000010032000-memory.dmp	family_farfli
behavioral2/memory/1360-13-0x0000000010001000-0x0000000010021000-memory.dmp	family_farfli
behavioral2/memory/1360-12-0x0000000010000000-0x0000000010032000-memory.dmp	family_farfli

Custom signature

Detects executables containing base64 encoded User Agent 2 IoCs

resource	yara_rule
behavioral2/memory/1360-10-0x0000000010000000-0x0000000010032000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/1360-12-0x0000000010000000-0x0000000010032000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

Custom signature

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/4832-0-0x0000000000400000-0x0000000000423000-memory.dmp	UPX
behavioral2/memory/4832-2-0x0000000000400000-0x0000000000423000-memory.dmp	UPX
behavioral2/files/0x000e000000028e7a-4.dat	UPX
behavioral2/memory/2192-7-0x0000000000400000-0x0000000000423000-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	1360	rundll32.exe
2	1360	rundll32.exe
3	1360	rundll32.exe
4	1360	rundll32.exe
6	1360	rundll32.exe
7	1360	rundll32.exe
8	1360	rundll32.exe
11	1360	rundll32.exe

Deletes itself 1 IoCs

pid	Process
2192	pzzvm.exe

Executes dropped EXE 1 IoCs

pid	Process
2192	pzzvm.exe

Loads dropped DLL 1 IoCs

pid	Process
1360	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:\\tetez\\hvnbf.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)	\??\k:	rundll32.exe
File opened (read-only)	\??\l:	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)	\??\y:	rundll32.exe
File opened (read-only)	\??\p:	rundll32.exe
File opened (read-only)	\??\a:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.exe
File opened (read-only)	\??\g:	rundll32.exe
File opened (read-only)	\??\h:	rundll32.exe
File opened (read-only)	\??\i:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\t:	rundll32.exe
File opened (read-only)	\??\e:	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)	\??\u:	rundll32.exe
File opened (read-only)	\??\z:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\o:	rundll32.exe
File opened (read-only)	\??\x:	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/4832-0-0x0000000000400000-0x0000000000423000-memory.dmp	upx
behavioral2/memory/4832-2-0x0000000000400000-0x0000000000423000-memory.dmp	upx
behavioral2/files/0x000e000000028e7a-4.dat	upx
behavioral2/memory/2192-7-0x0000000000400000-0x0000000000423000-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	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-04-17_482726e84868e1790e74f2cedd7294ef_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	pzzvm.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
5192	cmd.exe
3252	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
3252	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1360	rundll32.exe
1360	rundll32.exe
1360	rundll32.exe
1360	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1360	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
4832	2026-04-17_482726e84868e1790e74f2cedd7294ef_coinminer_elex_wannacry.exe
2192	pzzvm.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 4832 wrote to memory of 5192	4832	2026-04-17_482726e84868e1790e74f2cedd7294ef_coinminer_elex_wannacry.exe	78
PID 5192 wrote to memory of 3252	5192	cmd.exe	80
PID 5192 wrote to memory of 2192	5192	cmd.exe	81
PID 2192 wrote to memory of 1360	2192	pzzvm.exe	82

C:\Users\Admin\AppData\Local\Temp\2026-04-17_482726e84868e1790e74f2cedd7294ef_coinminer_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-04-17_482726e84868e1790e74f2cedd7294ef_coinminer_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4832
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&c:\pzzvm.exe "C:\Users\Admin\AppData\Local\Temp\2026-04-17_482726e84868e1790e74f2cedd7294ef_coinminer_elex_wannacry.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:5192
- - 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:3252
- - \??\c:\pzzvm.exe
    c:\pzzvm.exe "C:\Users\Admin\AppData\Local\Temp\2026-04-17_482726e84868e1790e74f2cedd7294ef_coinminer_elex_wannacry.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:2192
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\tetez\hvnbf.dll",init c:\pzzvm.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:1360

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

pzzvm.exe

Path C:\pzzvm.exe
Size 150KB
SHA256 edca98706fbdfd782e04b1f3bcea08feab75b1a7231ab269bf7271fc5ac9092c
MD5 1184e2a264c7dc2b9ff254b04d38a3b7
SHA1 6f6f66fbf8d136f6ecf2d5acd1a07674bace5255
SHA512 1ee67c7cd897108bf2ed82cc03bbae16c0917eb39d7666bab89237b76dcb241e1e81c459083ee2d308d12bf4655493fdaa02becd342bf0d407b51d1af2107883
SSDEEP 1536:B3aacz2htqkUla/NGVcJ/gAqcX0JMseuiGSeNVvDi0tMuUJJny3GM+9qKvx:Ua/qc9rqzMseNoVv9EJFnM8qKvx
TLSH
T1A8E3370267F6C194F0B31E34DA3646F08BA6BC69FA70921B13847E4EBD31A15ED21776
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

hvnbf.dll

Path \??\c:\tetez\hvnbf.dll
Size 50KB
SHA256 a632527bcd457c9a4cfce83e7a9a675baff790b0279de5d8ea3192dfb2dd888a
MD5 ab32c5bfd7ecfbe9ed733dfb81210933
SHA1 4d5c6e7a0031691f12e78b096ff928b0d55bdfab
SHA512 59b971146292074d76d23d5f26889108f4d6e33804332449f4c589bf8a8d53e37ac8dfea47e9d3c5ae0f382ae1acf25c4968bea87b3f5ff9d51f2274229c1ab5
SSDEEP 1536:mrrG57ZqLLpf+Xz+HOtygmRnO/x5Rq8Gm:mwKGqutWM/x281
TLSH
T12033F1F4EFB4E067ECBA5F743E6A6215DA727B10C63188EA518090135F335CACA18717
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/1360-11-0x0000000010001000-0x0000000010021000-memory.dmp

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memory/1360-10-0x0000000010000000-0x0000000010032000-memory.dmp

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memory/1360-13-0x0000000010001000-0x0000000010021000-memory.dmp

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memory/1360-12-0x0000000010000000-0x0000000010032000-memory.dmp

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memory/1360-14-0x0000000001300000-0x0000000001307000-memory.dmp

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memory/1360-15-0x0000000003470000-0x00000000034D4000-memory.dmp

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memory/2192-7-0x0000000000400000-0x0000000000423000-memory.dmp

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memory/4832-0-0x0000000000400000-0x0000000000423000-memory.dmp

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memory/4832-2-0x0000000000400000-0x0000000000423000-memory.dmp

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