farfli | b122678110679647055272db60c3a1545d264e42a04b69b7a78afd6c5b6da60d

Analysis

max time kernel
149s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20260130-en
resource tags

arch:x64arch:x86image:win10v2004-20260130-enlocale:en-usos:windows10-2004-x64systemwindows
submitted
16/04/2026, 21:33

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General

Target
2026-04-16_a087ca027e88938bf4b210875f71888c_elex_wannacry.exe
Size 120KB
Sample260416-1eptmset4v
SHA256 b122678110679647055272db60c3a1545d264e42a04b69b7a78afd6c5b6da60d
MD5 a087ca027e88938bf4b210875f71888c
SHA1 4325e2d6b244280a177449638dc46066714a0ba7
SHA512 949a7a411988070fe45e0a36327b86f8c44355f9a92db3c3ebbfef1fe0accb605c16b39184e9d26aac29c2710e45849a2aa5e40849bbdda7dc25db848b3f9096
SSDEEP 1536:f/6EkrKHqgGFs5N6s7H3dPT+X/O3DX6HZ9am1AEgHZ5bdpDvkDBlxZP1n:fSKP3Pe/Oz67aKVgbbdpDcljZ9n
TLSH
T116C3CF927A6485F0E01685331397AB318671AC5E7A1813EE93C8FE0F7D75221ECB729D
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 2 IoCs

resource	yara_rule
behavioral1/memory/4552-12-0x0000000010000000-0x0000000010030000-memory.dmp	family_farfli
behavioral1/memory/4552-15-0x0000000010000000-0x0000000010030000-memory.dmp	family_farfli

Custom signature

Detects executables containing base64 encoded User Agent 2 IoCs

resource	yara_rule
behavioral1/memory/4552-12-0x0000000010000000-0x0000000010030000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/4552-15-0x0000000010000000-0x0000000010030000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

Badlisted process makes network request 8 IoCs

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

flow	pid	Process
6	4552	rundll32.exe
7	4552	rundll32.exe
8	4552	rundll32.exe
11	4552	rundll32.exe
23	4552	rundll32.exe
35	4552	rundll32.exe
50	4552	rundll32.exe
59	4552	rundll32.exe

Deletes itself 1 IoCs

pid	Process
4868	kcckamj.exe

Executes dropped EXE 1 IoCs

pid	Process
4868	kcckamj.exe

Loads dropped DLL 1 IoCs

pid	Process
4552	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-1-5-21-721190819-434563495-2007910846-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\EvtMgr = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\wjalhbfo\\znxrwgsh.dll\",QueryPluginInterface"	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)	\??\t:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\x:	rundll32.exe
File opened (read-only)	\??\z:	rundll32.exe
File opened (read-only)	\??\i:	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)	\??\b:	rundll32.exe
File opened (read-only)	\??\e:	rundll32.exe
File opened (read-only)	\??\g:	rundll32.exe
File opened (read-only)	\??\h:	rundll32.exe
File opened (read-only)	\??\q:	rundll32.exe
File opened (read-only)	\??\a:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\n:	rundll32.exe
File opened (read-only)	\??\o:	rundll32.exe
File opened (read-only)	\??\r:	rundll32.exe
File opened (read-only)	\??\v:	rundll32.exe
File opened (read-only)	\??\y:	rundll32.exe
File opened (read-only)	\??\k:	rundll32.exe
File opened (read-only)	\??\l:	rundll32.exe
File opened (read-only)	\??\m:	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
behavioral1/memory/4520-0-0x0000000000400000-0x000000000041E000-memory.dmp	upx
behavioral1/memory/4520-3-0x0000000000400000-0x000000000041E000-memory.dmp	upx
behavioral1/files/0x0005000000023076-5.dat	upx
behavioral1/memory/4868-9-0x0000000000400000-0x000000000041E000-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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PING.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	kcckamj.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-04-16_a087ca027e88938bf4b210875f71888c_elex_wannacry.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
4668	cmd.exe
4380	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
4380	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
4552	rundll32.exe
4552	rundll32.exe
4552	rundll32.exe
4552	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4552	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
4520	2026-04-16_a087ca027e88938bf4b210875f71888c_elex_wannacry.exe
4868	kcckamj.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 4520 wrote to memory of 4668	4520	2026-04-16_a087ca027e88938bf4b210875f71888c_elex_wannacry.exe	84
PID 4668 wrote to memory of 4380	4668	cmd.exe	86
PID 4668 wrote to memory of 4868	4668	cmd.exe	87
PID 4868 wrote to memory of 4552	4868	kcckamj.exe	88

C:\Users\Admin\AppData\Local\Temp\2026-04-16_a087ca027e88938bf4b210875f71888c_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-04-16_a087ca027e88938bf4b210875f71888c_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4520
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\kcckamj.exe "C:\Users\Admin\AppData\Local\Temp\2026-04-16_a087ca027e88938bf4b210875f71888c_elex_wannacry.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:4668
- - 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:4380
- - C:\Users\Admin\AppData\Local\Temp\kcckamj.exe
    C:\Users\Admin\AppData\Local\Temp\\kcckamj.exe "C:\Users\Admin\AppData\Local\Temp\2026-04-16_a087ca027e88938bf4b210875f71888c_elex_wannacry.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:4868
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\wjalhbfo\znxrwgsh.dll",QueryPluginInterface C:\Users\Admin\AppData\Local\Temp\kcckamj.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:4552

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

kcckamj.exe

Path C:\Users\Admin\AppData\Local\Temp\kcckamj.exe
Size 120KB
SHA256 c3d938118ebd7dae50c8852018cff9f43d194a307f8c93d2c01564dbc77957c5
MD5 7a13a2510f33f5a9067022297089d530
SHA1 6b82e850cafb0ba00caefb0575fe3f5e188788ce
SHA512 0e83383c014be4e9a1c770285f78a74e6f6c1c94d6c27fca79db7644ddb17081ff7922f65adf96ba449fad5138fba78d86d257d110f247d87cd76830db158aa0
SSDEEP 1536:f/6EkrKHqgGFs5N6s7H3dPT+X/O3DX6HZ9am1AEgHZ5bdpDvkDBlxZP1nK:fSKP3Pe/Oz67aKVgbbdpDcljZ9nK
TLSH
T1DEC3CF927A6085F0E01685331397AB318671EC5E7A1813EE93C8FE0F7D65621ECB729D
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

znxrwgsh.dll

Path \??\c:\wjalhbfo\znxrwgsh.dll
Size 59KB
SHA256 12264670242948b129acc4d9cd80cdf83fac88e662c09a57ce5ac6b39510618d
MD5 8552951ec6ab253e038ffc809235b08c
SHA1 c59e347bfebd96c0e4b60a0d33b5923fb137af55
SHA512 17864dfff89f397c647ec02926cfd639e33a05061cb6164756afd3d8c4e24281cba9c4770d16927ba56e1e02a139faf970748bfe07454f4528eab9f87e2c0cd9
SSDEEP 1536:x0u5H+DyujZ2uoHzCf/IYmRGMJnc7Z4ch:x04eDyY/oH8SIMJncNnh
TLSH
T12843F21CE351855BDAAB0672678F6F407A238A7F5B32485A914C2454BF3BE77C937380
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/4520-2-0x0000000000890000-0x0000000000B11000-memory.dmp

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memory/4520-3-0x0000000000400000-0x000000000041E000-memory.dmp

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memory/4520-0-0x0000000000400000-0x000000000041E000-memory.dmp

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memory/4552-12-0x0000000010000000-0x0000000010030000-memory.dmp

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memory/4552-14-0x0000000002D90000-0x0000000002D97000-memory.dmp

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memory/4552-13-0x00000000011E0000-0x0000000001461000-memory.dmp

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memory/4552-15-0x0000000010000000-0x0000000010030000-memory.dmp

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memory/4552-27-0x00000000011E0000-0x0000000001461000-memory.dmp

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memory/4552-39-0x00000000011E0000-0x0000000001461000-memory.dmp

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memory/4868-9-0x0000000000400000-0x000000000041E000-memory.dmp

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memory/4868-8-0x00000000008A0000-0x0000000000B21000-memory.dmp

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