farfli | a10b2c5990281803769d78fa61bdd2bf9fb309e10c2aca02a16e960e6ff975f9

Analysis

max time kernel
148s
max time network
143s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260709-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
15/08/2026, 05:03

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General

Target
2026-08-15_f95e30c351ee114c8eec063d4fe129e7_coinminer_elex_wannacry.exe
Size 155KB
Sample260815-fpsm3aer81
SHA256 a10b2c5990281803769d78fa61bdd2bf9fb309e10c2aca02a16e960e6ff975f9
MD5 f95e30c351ee114c8eec063d4fe129e7
SHA1 f613c005122316bfcb9b6beb29f4ffac9d3a8087
SHA512 f86f486dba8544137ed034052fd69d10677c26d8b5beab4e53860f8a98d0d08c7cf13bebbf4bba75c100a2b91d5b635c8181e4bc38b7060a2db2948269112636
SSDEEP 1536:B3aacz2htqkUla/NGVcJ/gAqcX0JMseuiGSeNVvDi0tMuUJJny3GM+9qKv:Ua/qc9rqzMseNoVv9EJFnM8qKv
TLSH
T164F3270267F6C194F0B31E34DA3646F08BA6BC59FA70922B13847E4EBD31A15ED21776
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 4 IoCs

resource	yara_rule
behavioral2/memory/3208-10-0x0000000010001000-0x0000000010021000-memory.dmp	family_farfli
behavioral2/memory/3208-9-0x0000000010000000-0x0000000010032000-memory.dmp	family_farfli
behavioral2/memory/3208-12-0x0000000010001000-0x0000000010021000-memory.dmp	family_farfli
behavioral2/memory/3208-11-0x0000000010000000-0x0000000010032000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 2 IoCs

resource	yara_rule
behavioral2/memory/3208-9-0x0000000010000000-0x0000000010032000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/3208-11-0x0000000010000000-0x0000000010032000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/3780-0-0x0000000000400000-0x0000000000423000-memory.dmp	UPX
behavioral2/memory/3780-2-0x0000000000400000-0x0000000000423000-memory.dmp	UPX
behavioral2/files/0x000d000000019cd9-3.dat	UPX
behavioral2/memory/2536-6-0x0000000000400000-0x0000000000423000-memory.dmp	UPX

Badlisted process makes network request 8 IoCs

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

flow	pid	Process
3	3208	rundll32.exe
7	3208	rundll32.exe
8	3208	rundll32.exe
9	3208	rundll32.exe
11	3208	rundll32.exe
12	3208	rundll32.exe
17	3208	rundll32.exe
19	3208	rundll32.exe

Deletes itself 1 IoCs

pid	Process
2536	oscresvp.exe

Executes dropped EXE 1 IoCs

pid	Process
2536	oscresvp.exe

Loads dropped DLL 1 IoCs

pid	Process
3208	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-1-5-21-552508041-2681165170-3229858294-1000\Software\Microsoft\Windows\CurrentVersion\Run\EvtMgr = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\fsxxs\\nguze.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)	\??\j:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\o:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\d:	rundll32.exe
File opened (read-only)	\??\h:	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)	\??\y:	rundll32.exe
File opened (read-only)	\??\q:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.exe
File opened (read-only)	\??\g:	rundll32.exe
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)	\??\z:	rundll32.exe
File opened (read-only)	\??\i:	rundll32.exe
File opened (read-only)	\??\n:	rundll32.exe
File opened (read-only)	\??\t:	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/3780-0-0x0000000000400000-0x0000000000423000-memory.dmp	upx
behavioral2/memory/3780-2-0x0000000000400000-0x0000000000423000-memory.dmp	upx
behavioral2/files/0x000d000000019cd9-3.dat	upx
behavioral2/memory/2536-6-0x0000000000400000-0x0000000000423000-memory.dmp	upx

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
4148	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	oscresvp.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-08-15_f95e30c351ee114c8eec063d4fe129e7_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
4148	cmd.exe
4272	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
4272	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
3208	rundll32.exe
3208	rundll32.exe
3208	rundll32.exe
3208	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3208	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
3780	2026-08-15_f95e30c351ee114c8eec063d4fe129e7_coinminer_elex_wannacry.exe
2536	oscresvp.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 3780 wrote to memory of 4148	3780	2026-08-15_f95e30c351ee114c8eec063d4fe129e7_coinminer_elex_wannacry.exe	89
PID 4148 wrote to memory of 4272	4148	cmd.exe	91
PID 4148 wrote to memory of 2536	4148	cmd.exe	92
PID 2536 wrote to memory of 3208	2536	oscresvp.exe	93

C:\Users\Admin\AppData\Local\Temp\2026-08-15_f95e30c351ee114c8eec063d4fe129e7_coinminer_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-08-15_f95e30c351ee114c8eec063d4fe129e7_coinminer_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3780
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&c:\oscresvp.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-15_f95e30c351ee114c8eec063d4fe129e7_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:4148
- - 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:4272
- - \??\c:\oscresvp.exe
    c:\oscresvp.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-15_f95e30c351ee114c8eec063d4fe129e7_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:2536
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\fsxxs\nguze.dll",init c:\oscresvp.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:3208

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

nguze.dll

Path \??\c:\fsxxs\nguze.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

oscresvp.exe

Path \??\c:\oscresvp.exe
Size 155KB
SHA256 cf18ddc333a5520ba187ec4ebf8231c757e1c3289ecc99fc5af4994c57c9cac9
MD5 c8977a5256e339d23ba164d1b5f1be05
SHA1 fb9ff502d0ef2def3de9aff65ba7e6cc3c73e9ef
SHA512 47fc46f0231ee551fe1fc7ff42b8bc09571616fce117bc9dd18028558b37f93934eb53b5d0c54ed4a90f9400c072ece046b5b3fbe33512b07f50eee925545c30
SSDEEP 1536:B3aacz2htqkUla/NGVcJ/gAqcX0JMseuiGSeNVvDi0tMuUJJny3GM+9qKvL:Ua/qc9rqzMseNoVv9EJFnM8qKvL
TLSH
T17BF3270267F6C194F0B31E34DA3646F08BA6BC59FA70922B13847E4EBD31A15ED21776
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/2536-6-0x0000000000400000-0x0000000000423000-memory.dmp

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memory/3208-10-0x0000000010001000-0x0000000010021000-memory.dmp

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memory/3208-9-0x0000000010000000-0x0000000010032000-memory.dmp

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memory/3208-12-0x0000000010001000-0x0000000010021000-memory.dmp

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memory/3208-11-0x0000000010000000-0x0000000010032000-memory.dmp

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memory/3780-0-0x0000000000400000-0x0000000000423000-memory.dmp

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memory/3780-2-0x0000000000400000-0x0000000000423000-memory.dmp

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