farfli | 127cc5b9240c31a4846707e7a182e232a76b0e9dfa38f2757ba4d5b67291706c

Analysis

max time kernel
149s
max time network
150s
platform
windows11-21h2_x64
resource
win11-20260130-en
resource tags

arch:x64arch:x86image:win11-20260130-enlocale:en-usos:windows11-21h2-x64systemwindows
submitted
23/04/2026, 09:47

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General

Target
2026-04-23_a05c24d4d143458c09ec3aa7a08a04c5_elex_wannacry.exe
Size 220KB
Sample260423-lskphsg13x
SHA256 127cc5b9240c31a4846707e7a182e232a76b0e9dfa38f2757ba4d5b67291706c
MD5 a05c24d4d143458c09ec3aa7a08a04c5
SHA1 729f0da4a1372b509e58a6b78a967a5f7b706cb6
SHA512 74353a779248bf276604848b36772d85eb66c26f6980347aa876efc37cdbf235300aaeba0a9c6c4fcf7bb83efbbc97f6bca480272344c7717999d9081557b990
SSDEEP 6144:LMPTxAnyi9awI2WXyZPbwdpLr7FQXSzK:4PTPjnCCdpO
TLSH
T1DA24F111D6D6C1D9D07247FA8E3BC539CC1AAE261F0865C332563B6AA875DE1AF3102F
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

aspackv2 backdoor bootkit discovery farfli persistence spyware stealer vmprotect

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/2984-13-0x0000000010000000-0x0000000010037000-memory.dmp	family_farfli
behavioral2/memory/2984-14-0x0000000010000000-0x0000000010037000-memory.dmp	family_farfli
behavioral2/memory/2984-15-0x0000000010000000-0x0000000010037000-memory.dmp	family_farfli
behavioral2/memory/2984-19-0x0000000010000000-0x0000000010037000-memory.dmp	family_farfli
behavioral2/memory/2984-21-0x0000000010000000-0x0000000010037000-memory.dmp	family_farfli
behavioral2/memory/2984-23-0x0000000010000000-0x0000000010037000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 6 IoCs

resource	yara_rule
behavioral2/memory/2984-13-0x0000000010000000-0x0000000010037000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/2984-14-0x0000000010000000-0x0000000010037000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/2984-15-0x0000000010000000-0x0000000010037000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/2984-19-0x0000000010000000-0x0000000010037000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/2984-21-0x0000000010000000-0x0000000010037000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/2984-23-0x0000000010000000-0x0000000010037000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

Detects executables packed with VMProtect. 12 IoCs

resource	yara_rule
behavioral2/memory/4504-0-0x0000000000400000-0x0000000000432000-memory.dmp	INDICATOR_EXE_Packed_VMProtect
behavioral2/memory/4504-3-0x0000000000400000-0x0000000000432000-memory.dmp	INDICATOR_EXE_Packed_VMProtect
behavioral2/files/0x002300000002b086-5.dat	INDICATOR_EXE_Packed_VMProtect
behavioral2/memory/4924-9-0x0000000000400000-0x0000000000432000-memory.dmp	INDICATOR_EXE_Packed_VMProtect
behavioral2/files/0x001600000002b38b-10.dat	INDICATOR_EXE_Packed_VMProtect
behavioral2/memory/2984-12-0x0000000010000000-0x0000000010037000-memory.dmp	INDICATOR_EXE_Packed_VMProtect
behavioral2/memory/2984-13-0x0000000010000000-0x0000000010037000-memory.dmp	INDICATOR_EXE_Packed_VMProtect
behavioral2/memory/2984-14-0x0000000010000000-0x0000000010037000-memory.dmp	INDICATOR_EXE_Packed_VMProtect
behavioral2/memory/2984-15-0x0000000010000000-0x0000000010037000-memory.dmp	INDICATOR_EXE_Packed_VMProtect
behavioral2/memory/2984-19-0x0000000010000000-0x0000000010037000-memory.dmp	INDICATOR_EXE_Packed_VMProtect
behavioral2/memory/2984-21-0x0000000010000000-0x0000000010037000-memory.dmp	INDICATOR_EXE_Packed_VMProtect
behavioral2/memory/2984-23-0x0000000010000000-0x0000000010037000-memory.dmp	INDICATOR_EXE_Packed_VMProtect

Badlisted process makes network request 4 IoCs

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

flow	pid	Process
1	2984	rundll32.exe
3	2984	rundll32.exe
4	2984	rundll32.exe
5	2984	rundll32.exe

ASPack v2.12-2.42 1 IoCs

Detects executables packed with ASPack v2.12-2.42

aspackv2

resource	yara_rule
behavioral2/files/0x001600000002b38b-10.dat	aspack_v212_v242

Deletes itself 1 IoCs

pid	Process
4924	oducs.exe

Executes dropped EXE 1 IoCs

pid	Process
4924	oducs.exe

Loads dropped DLL 1 IoCs

pid	Process
2984	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

VMProtect packed file 8 IoCs

Detects executables packed with VMProtect commercial packer.

vmprotect

resource	yara_rule
behavioral2/files/0x001600000002b38b-10.dat	vmprotect
behavioral2/memory/2984-12-0x0000000010000000-0x0000000010037000-memory.dmp	vmprotect
behavioral2/memory/2984-13-0x0000000010000000-0x0000000010037000-memory.dmp	vmprotect
behavioral2/memory/2984-14-0x0000000010000000-0x0000000010037000-memory.dmp	vmprotect
behavioral2/memory/2984-15-0x0000000010000000-0x0000000010037000-memory.dmp	vmprotect
behavioral2/memory/2984-19-0x0000000010000000-0x0000000010037000-memory.dmp	vmprotect
behavioral2/memory/2984-21-0x0000000010000000-0x0000000010037000-memory.dmp	vmprotect
behavioral2/memory/2984-23-0x0000000010000000-0x0000000010037000-memory.dmp	vmprotect

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-1-5-21-3119821332-640943685-2562343641-1000\Software\Microsoft\Windows\CurrentVersion\Run\EvtMgr = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\prgjs\\ykkle.kly\",Exit"	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)	\??\b:	rundll32.exe
File opened (read-only)	\??\h:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\q:	rundll32.exe
File opened (read-only)	\??\r:	rundll32.exe
File opened (read-only)	\??\w:	rundll32.exe
File opened (read-only)	\??\x:	rundll32.exe
File opened (read-only)	\??\e:	rundll32.exe
File opened (read-only)	\??\i:	rundll32.exe
File opened (read-only)	\??\l:	rundll32.exe
File opened (read-only)	\??\n:	rundll32.exe
File opened (read-only)	\??\p:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\y:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\t:	rundll32.exe
File opened (read-only)	\??\v:	rundll32.exe
File opened (read-only)	\??\z:	rundll32.exe
File opened (read-only)	\??\g:	rundll32.exe
File opened (read-only)	\??\k:	rundll32.exe
File opened (read-only)	\??\o:	rundll32.exe
File opened (read-only)	\??\s:	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

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	oducs.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-04-23_a05c24d4d143458c09ec3aa7a08a04c5_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
4412	cmd.exe
3664	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
3664	PING.EXE

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
2984	rundll32.exe
2984	rundll32.exe
2984	rundll32.exe
2984	rundll32.exe
2984	rundll32.exe
2984	rundll32.exe
2984	rundll32.exe
2984	rundll32.exe
2984	rundll32.exe
2984	rundll32.exe
2984	rundll32.exe
2984	rundll32.exe
2984	rundll32.exe
2984	rundll32.exe
2984	rundll32.exe
2984	rundll32.exe
2984	rundll32.exe
2984	rundll32.exe
2984	rundll32.exe
2984	rundll32.exe
2984	rundll32.exe
2984	rundll32.exe
2984	rundll32.exe
2984	rundll32.exe
2984	rundll32.exe
2984	rundll32.exe
2984	rundll32.exe
2984	rundll32.exe
2984	rundll32.exe
2984	rundll32.exe
2984	rundll32.exe
2984	rundll32.exe
2984	rundll32.exe
2984	rundll32.exe
2984	rundll32.exe
2984	rundll32.exe
2984	rundll32.exe
2984	rundll32.exe
2984	rundll32.exe
2984	rundll32.exe
2984	rundll32.exe
2984	rundll32.exe
2984	rundll32.exe
2984	rundll32.exe
2984	rundll32.exe
2984	rundll32.exe
2984	rundll32.exe
2984	rundll32.exe
2984	rundll32.exe
2984	rundll32.exe
2984	rundll32.exe
2984	rundll32.exe
2984	rundll32.exe
2984	rundll32.exe
2984	rundll32.exe
2984	rundll32.exe
2984	rundll32.exe
2984	rundll32.exe
2984	rundll32.exe
2984	rundll32.exe
2984	rundll32.exe
2984	rundll32.exe
2984	rundll32.exe
2984	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2984	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
4504	2026-04-23_a05c24d4d143458c09ec3aa7a08a04c5_elex_wannacry.exe
4924	oducs.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 4504 wrote to memory of 4412	4504	2026-04-23_a05c24d4d143458c09ec3aa7a08a04c5_elex_wannacry.exe	79
PID 4412 wrote to memory of 3664	4412	cmd.exe	81
PID 4412 wrote to memory of 4924	4412	cmd.exe	82
PID 4924 wrote to memory of 2984	4924	oducs.exe	83

C:\Users\Admin\AppData\Local\Temp\2026-04-23_a05c24d4d143458c09ec3aa7a08a04c5_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-04-23_a05c24d4d143458c09ec3aa7a08a04c5_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4504
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\oducs.exe "C:\Users\Admin\AppData\Local\Temp\2026-04-23_a05c24d4d143458c09ec3aa7a08a04c5_elex_wannacry.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:4412
- - 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:3664
- - C:\Users\Admin\AppData\Local\Temp\oducs.exe
    C:\Users\Admin\AppData\Local\Temp\\oducs.exe "C:\Users\Admin\AppData\Local\Temp\2026-04-23_a05c24d4d143458c09ec3aa7a08a04c5_elex_wannacry.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:4924
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\prgjs\ykkle.kly",Exit C:\Users\Admin\AppData\Local\Temp\oducs.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:2984

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

oducs.exe

Path C:\Users\Admin\AppData\Local\Temp\oducs.exe
Size 220KB
SHA256 cb5b219553b97a38ee3c606f891b2fe1909b3d785c12b26547d1402b8085c383
MD5 ea18014de13cd0a2f46b149241d5fbcf
SHA1 733abaf37764c368256c71005b95762b4dfe165b
SHA512 f6d5a7521cdcb833ab1d13889c8499acbf96230ee38a7b59e79e6e1582c0c93e07113a672f2fdc9b9f24bb5199c27b57b23122d421bbb9b4da330bd29707c915
SSDEEP 6144:LMPTxAnyi9awI2WXyZPbwdpLr7FQXSzKk:4PTPjnCCdpOy
TLSH
T19E24F110D5D6C1D9D07247FA8E3BC539CD1AAE261F0865C332563B6AA875EE1AF3102F
MD5 SHA1 SHA512 SSDEEP TLSH

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ykkle.kly

Path \??\c:\prgjs\ykkle.kly
Size 128KB
SHA256 8fe1d9492012107c64090e2bbed51ca84f46f0828bd95b18326f776e694e3bcb
MD5 64597ebd5759f1c96d9c89ba91e6b9ae
SHA1 22b5c32c02e7d98384b5d364d4e88805a988e58a
SHA512 88cf508773b316acafafc5882dd6a50f895a4f444cfa0ef25781c0c5bbd8eba69e38b777460e66ee2cb25e6c61b699b0120788e00b2a0018bc02d07d644d076f
SSDEEP 3072:zjxNhLqeuecFnbG2BSyxqmImnttHdJOrGdnyANCfIc4wL:3xNhPlEnq2BSy4/mnTHdJOrg18l
TLSH
T1B9D301153654C57FC4FB5231C4A9DA3A8B723CA7E1264A8A71DC8E6F3D5900D8F423AC
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/2984-19-0x0000000010000000-0x0000000010037000-memory.dmp

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memory/2984-16-0x0000000002990000-0x0000000002A0A000-memory.dmp

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memory/2984-23-0x0000000010000000-0x0000000010037000-memory.dmp

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memory/2984-21-0x0000000010000000-0x0000000010037000-memory.dmp

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memory/2984-20-0x0000000002990000-0x0000000002A0A000-memory.dmp

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memory/2984-12-0x0000000010000000-0x0000000010037000-memory.dmp

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memory/2984-13-0x0000000010000000-0x0000000010037000-memory.dmp

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memory/2984-14-0x0000000010000000-0x0000000010037000-memory.dmp

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memory/2984-15-0x0000000010000000-0x0000000010037000-memory.dmp

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memory/4504-3-0x0000000000400000-0x0000000000432000-memory.dmp

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memory/4504-0-0x0000000000400000-0x0000000000432000-memory.dmp

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memory/4504-2-0x0000000000A40000-0x0000000000ABA000-memory.dmp

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memory/4924-9-0x0000000000400000-0x0000000000432000-memory.dmp

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memory/4924-8-0x00000000021F0000-0x000000000226A000-memory.dmp

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