b8b9b479a3be2b08b0112351429069235de7f49d4da539d42d3ac3de85741e6a

Analysis

max time kernel
150s
max time network
126s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260911-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260911-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
25/09/2026, 18:12

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General

Target
jaffacakes118_b8b9b479a3be2b08b0112351429069235de7f49d4da539d42d3ac3de85741e6a.exe
Size 33KB
Sample260925-wtb4washrd
SHA256 b8b9b479a3be2b08b0112351429069235de7f49d4da539d42d3ac3de85741e6a
MD5 975beb0cf58bf502619f16bcc3b4be0e
SHA1 b623084e2519e57bf48ae1240bc4bcbb99835b8b
SHA512 a6c81bfc2de62288a94e723e8135da10dad697b47ab649a273699b98ca37cdd2f392a106b67a1f902e0e12f1a051c5053b3009928a4064b6ec9e71506edb8bf5
SSDEEP 768:CHBpreVoi5WpIy8XDN/puYnyiK4hNdaiU6uOs7:2EdWpIZTrdKvr7
TLSH
T1F5E23B4BAB4540B3C2ED0234706D5F379DBEA934299498A3CF734BDA2C751E3E46430A
MD5 SHA1 SHA512 SSDEEP TLSH

Score

7^/10

discovery persistence

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
4368	fmbiost.exe

Loads dropped DLL 2 IoCs

pid	Process
4076	jaffacakes118_b8b9b479a3be2b08b0112351429069235de7f49d4da539d42d3ac3de85741e6a.exe
4368	fmbiost.exe

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\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\fmbiost = "C:\\Windows\\fmbiost.exe"	jaffacakes118_b8b9b479a3be2b08b0112351429069235de7f49d4da539d42d3ac3de85741e6a.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\fmbiost.dll	jaffacakes118_b8b9b479a3be2b08b0112351429069235de7f49d4da539d42d3ac3de85741e6a.exe
File created	C:\Windows\SysWOW64\fmbiost.dll	fmbiost.exe

Drops file in Windows directory 1 IoCs

description	ioc	Process
File created	C:\Windows\fmbiost.exe	jaffacakes118_b8b9b479a3be2b08b0112351429069235de7f49d4da539d42d3ac3de85741e6a.exe

System Location Discovery: System Language Discovery 1 TTPs 2 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	jaffacakes118_b8b9b479a3be2b08b0112351429069235de7f49d4da539d42d3ac3de85741e6a.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	fmbiost.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
4076	jaffacakes118_b8b9b479a3be2b08b0112351429069235de7f49d4da539d42d3ac3de85741e6a.exe
4076	jaffacakes118_b8b9b479a3be2b08b0112351429069235de7f49d4da539d42d3ac3de85741e6a.exe
4368	fmbiost.exe
4368	fmbiost.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
4076	jaffacakes118_b8b9b479a3be2b08b0112351429069235de7f49d4da539d42d3ac3de85741e6a.exe
4368	fmbiost.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 4076 wrote to memory of 1060	4076	jaffacakes118_b8b9b479a3be2b08b0112351429069235de7f49d4da539d42d3ac3de85741e6a.exe	80
PID 4368 wrote to memory of 1060	4368	fmbiost.exe	80

C:\Windows\explorer.exe
explorer.exe /LOADSAVEDWINDOWS
1⤵
PID:1060
- C:\Users\Admin\AppData\Local\Temp\jaffacakes118_b8b9b479a3be2b08b0112351429069235de7f49d4da539d42d3ac3de85741e6a.exe
  "C:\Users\Admin\AppData\Local\Temp\jaffacakes118_b8b9b479a3be2b08b0112351429069235de7f49d4da539d42d3ac3de85741e6a.exe"
  2⤵
  - Loads dropped DLL
  - Adds Run key to start application
  - Drops file in System32 directory
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:4076

C:\Windows\fmbiost.exe
C:\Windows\fmbiost.exe
1⤵
- Executes dropped EXE
- Loads dropped DLL
- Drops file in System32 directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4368

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

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

fmbiost.dll

Path C:\Windows\SysWOW64\fmbiost.dll
Size 26KB
SHA256 4507342bd6c28af7ad4f9f8c8868c8ff93bc47421dab03bfc6f46e64c75c0a26
MD5 4fb362cca7c12ada7857887c0a5d0e5d
SHA1 3f377096d11110f75435810fa441dbca4fd9fd3b
SHA512 27c3a79f19b5a1c01ac60e2535f8d2867a0b371969ea13c05a9187b3bc7d677cbabe13bbc88ddfd9531afbb2f43e46663c9be9e2bd123366037d7db129b36e47
SSDEEP 384:2WVPRIy80tQDDR/soAu7ibdUHFjawyz+KXpPyH/hN/lCJ7QlCHKrumM8slDZ:2WpIy8XDN/puYnyiK4hNdaiU6uOs7
TLSH
T1F5C24A569B4181F3D3BE0234706D1F3B6DBEA93868949493DF734BE928761E7F42420A
MD5 SHA1 SHA512 SSDEEP TLSH

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fmbiost.exe

Path C:\Windows\fmbiost.exe
Size 33KB
SHA256 b8b9b479a3be2b08b0112351429069235de7f49d4da539d42d3ac3de85741e6a
MD5 975beb0cf58bf502619f16bcc3b4be0e
SHA1 b623084e2519e57bf48ae1240bc4bcbb99835b8b
SHA512 a6c81bfc2de62288a94e723e8135da10dad697b47ab649a273699b98ca37cdd2f392a106b67a1f902e0e12f1a051c5053b3009928a4064b6ec9e71506edb8bf5
SSDEEP 768:CHBpreVoi5WpIy8XDN/puYnyiK4hNdaiU6uOs7:2EdWpIZTrdKvr7
TLSH
T1F5E23B4BAB4540B3C2ED0234706D5F379DBEA934299498A3CF734BDA2C751E3E46430A
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/1060-1-0x0000000001100000-0x0000000001101000-memory.dmp

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memory/4076-2-0x0000000000402000-0x0000000000403000-memory.dmp

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memory/4076-7-0x0000000000B20000-0x0000000000B21000-memory.dmp

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memory/4076-9-0x0000000000400000-0x000000000040A000-memory.dmp

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memory/4076-5-0x0000000000B10000-0x0000000000B11000-memory.dmp

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