8f3d98b5f4c7dd9bb0b956a4f4ea9fd5c8313ba0042a24ef81a269c7721ec899

Analysis

max time kernel
137s
max time network
138s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
14/10/2024, 00:57

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General

Target

8f3d98b5f4c7dd9bb0b956a4f4ea9fd5c8313ba0042a24ef81a269c7721ec899.exe
Size

110KB
MD5

bca374d85a9f5f7257fd1793c7c8a80a
SHA1

2b10b5fbe7282265a6394260081fb64a6e1332f6
SHA256

8f3d98b5f4c7dd9bb0b956a4f4ea9fd5c8313ba0042a24ef81a269c7721ec899
SHA512

c17d831d4ca42a912b1117c0741325f4c95c2e2f0207108594fcb341867da2b81564b797b5015171acec8a063ab8d56c7d41ead2db65593c573fb92f8ef1be54
SSDEEP

3072:5O248B0EMlIHxbHPwYV/wlmNie0ROfOlK:jLSzIHxMYV/9i1m

Score

7^/10

discovery persistence

Malware Config

Signatures

Executes dropped EXE 2 IoCs

pid	Process
1704	winlgon.exe
4592	rgsvr32.exe

Adds Run key to start application 2 TTPs 2 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\winlgon.exe = "c:\\users\\admin\\appdata\\local\\temp\\winlgon.exe"	8f3d98b5f4c7dd9bb0b956a4f4ea9fd5c8313ba0042a24ef81a269c7721ec899.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2437139445-1151884604-3026847218-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\winlgon.exe = "c:\\users\\admin\\appdata\\local\\temp\\winlgon.exe"	8f3d98b5f4c7dd9bb0b956a4f4ea9fd5c8313ba0042a24ef81a269c7721ec899.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2376	3088	WerFault.exe	82

System Location Discovery: System Language Discovery 1 TTPs 3 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	8f3d98b5f4c7dd9bb0b956a4f4ea9fd5c8313ba0042a24ef81a269c7721ec899.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	winlgon.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rgsvr32.exe

Suspicious use of SetWindowsHookEx 12 IoCs

pid	Process
3088	8f3d98b5f4c7dd9bb0b956a4f4ea9fd5c8313ba0042a24ef81a269c7721ec899.exe
1704	winlgon.exe
1704	winlgon.exe
1704	winlgon.exe
1704	winlgon.exe
1704	winlgon.exe
1704	winlgon.exe
4592	rgsvr32.exe
4592	rgsvr32.exe
4592	rgsvr32.exe
4592	rgsvr32.exe
1704	winlgon.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3088 wrote to memory of 1704	3088	8f3d98b5f4c7dd9bb0b956a4f4ea9fd5c8313ba0042a24ef81a269c7721ec899.exe	83
PID 3088 wrote to memory of 1704	3088	8f3d98b5f4c7dd9bb0b956a4f4ea9fd5c8313ba0042a24ef81a269c7721ec899.exe	83
PID 3088 wrote to memory of 1704	3088	8f3d98b5f4c7dd9bb0b956a4f4ea9fd5c8313ba0042a24ef81a269c7721ec899.exe	83
PID 1704 wrote to memory of 4592	1704	winlgon.exe	86
PID 1704 wrote to memory of 4592	1704	winlgon.exe	86
PID 1704 wrote to memory of 4592	1704	winlgon.exe	86

C:\Users\Admin\AppData\Local\Temp\8f3d98b5f4c7dd9bb0b956a4f4ea9fd5c8313ba0042a24ef81a269c7721ec899.exe
"C:\Users\Admin\AppData\Local\Temp\8f3d98b5f4c7dd9bb0b956a4f4ea9fd5c8313ba0042a24ef81a269c7721ec899.exe"
1⤵
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3088
- \??\c:\users\admin\appdata\local\temp\winlgon.exe
  c:\users\admin\appdata\local\temp\winlgon.exe
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1704
- - C:\Users\Admin\AppData\Local\Temp\rgsvr32.exe
    C:\Users\Admin\AppData\Local\Temp\rgsvr32.exe
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    PID:4592
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3088 -s 600
  2⤵
  - Program crash
  PID:2376

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 3088 -ip 3088
1⤵
PID:3552

Network

MITRE ATT&CK Enterprise v15

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

C:\Users\Admin\AppData\Local\Temp\rgsvr32.exe

Filesize
32KB

MD5
a22518e8a73ec19da806817d825d8a9c

SHA1
6f99e1591e1ce68ac44cd760729b2aeb2cba3559

SHA256
1ab5d2ea45fbff4444eabb45a3a31538730ce56f2b9c041bcab958e3c69db97b

SHA512
8f56ea79eab4b2e1d6b81981a9cd4f9652821b1cf17337ff3abf5796654fef08859fe4fa186015507b00ac606eefade1541235fcc6202ebf5257a1311638511e

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C:\Users\Admin\AppData\Local\Temp\winlgon.exe

Filesize
110KB

MD5
9de3ca7f0015a451a5dd5e61cc9108f5

SHA1
2191105599ee8de225c64a3c1d15513af32014c4

SHA256
cdbd3d1cc89935e2669f90ea91af1c79046b15207bccc7a4cd05c30394d513e1

SHA512
0786d372cceabade8d1d495dc527c64a41443418e4a3fdaf675ecd8ddcfe11c04afefed667f325efedb89c8a282880cc207efe1fcd38e9ac08dbbd38cab39b43

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads