71db1a0f28f755aeb3c505a3eaede43e204c67031e663d7f0f292365421c53ac

Analysis

max time kernel
134s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
05/11/2024, 23:46

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General

Target
71db1a0f28f755aeb3c505a3eaede43e204c67031e663d7f0f292365421c53ac.exe
Size 117KB
Sample241105-3sf5rssarr
SHA256 71db1a0f28f755aeb3c505a3eaede43e204c67031e663d7f0f292365421c53ac
MD5 76e1c8cf332b98b202fbe1107c21453a
SHA1 923e7bf09e39485460dc25a2d2dc56e7fe011cff
SHA512 3ca9435daf1e497ea8af6f342a63dee0a8052b0cba868d179a05a3e7c9d47dbc157f90e0d4df0e4f8d20eaa3265e18cfc12803e3ec509410bd90c875152ff316
SSDEEP 3072:OE9j8b3ZXgKC1hX//iASOXRJzDOD26j/3xK4:OEebiKuX//iZOXRJ3OD26jZZ
MD5 SHA1 SHA512 SSDEEP

Score

8^/10

discovery evasion execution

Malware Config

Signatures

Stops running service(s) 4 TTPs
evasion execution

Windows Service
T1543.003

Impair Defenses
T1562

Service Stop
T1489

Service Execution
T1569.002

Executes dropped EXE 1 IoCs

pid	Process
4768	smss.exe

Drops file in System32 directory 3 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\1230\smss.exe	71db1a0f28f755aeb3c505a3eaede43e204c67031e663d7f0f292365421c53ac.exe
File opened for modification	C:\Windows\SysWOW64\1230\smss.exe	smss.exe
File opened for modification	C:\Windows\SysWOW64\Service.exe	smss.exe

Launches sc.exe 2 IoCs

Sc.exe is a Windows utlilty to control services on the system.

pid	Process
1564	sc.exe
2484	sc.exe

System Location Discovery: System Language Discovery 1 TTPs 4 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	smss.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	71db1a0f28f755aeb3c505a3eaede43e204c67031e663d7f0f292365421c53ac.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
976	71db1a0f28f755aeb3c505a3eaede43e204c67031e663d7f0f292365421c53ac.exe
4768	smss.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 976 wrote to memory of 2484	976	71db1a0f28f755aeb3c505a3eaede43e204c67031e663d7f0f292365421c53ac.exe	84
PID 976 wrote to memory of 2484	976	71db1a0f28f755aeb3c505a3eaede43e204c67031e663d7f0f292365421c53ac.exe	84
PID 976 wrote to memory of 2484	976	71db1a0f28f755aeb3c505a3eaede43e204c67031e663d7f0f292365421c53ac.exe	84
PID 976 wrote to memory of 4768	976	71db1a0f28f755aeb3c505a3eaede43e204c67031e663d7f0f292365421c53ac.exe	86
PID 976 wrote to memory of 4768	976	71db1a0f28f755aeb3c505a3eaede43e204c67031e663d7f0f292365421c53ac.exe	86
PID 976 wrote to memory of 4768	976	71db1a0f28f755aeb3c505a3eaede43e204c67031e663d7f0f292365421c53ac.exe	86
PID 4768 wrote to memory of 1564	4768	smss.exe	87
PID 4768 wrote to memory of 1564	4768	smss.exe	87
PID 4768 wrote to memory of 1564	4768	smss.exe	87

C:\Users\Admin\AppData\Local\Temp\71db1a0f28f755aeb3c505a3eaede43e204c67031e663d7f0f292365421c53ac.exe
"C:\Users\Admin\AppData\Local\Temp\71db1a0f28f755aeb3c505a3eaede43e204c67031e663d7f0f292365421c53ac.exe"
1⤵
- Drops file in System32 directory
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:976
- C:\Windows\SysWOW64\sc.exe
  C:\Windows\system32\sc.exe stop wscsvc
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2484
- C:\Windows\SysWOW64\1230\smss.exe
  C:\Windows\system32\1230\smss.exe -d
  2⤵
  - Executes dropped EXE
  - Drops file in System32 directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:4768
- - C:\Windows\SysWOW64\sc.exe
    C:\Windows\system32\sc.exe stop wscsvc
    3⤵
    - Launches sc.exe
    - System Location Discovery: System Language Discovery
    PID:1564

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

System Services

T1569

Service Execution

T1569.002

Persistence

Create or Modify System Process

T1543

Windows Service

T1543.003

Privilege Escalation

Create or Modify System Process

T1543

Windows Service

T1543.003

Defense Evasion

Impair Defenses

T1562

Credential Access

Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Service Stop

T1489

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Downloads

smss.exe

Path C:\Windows\SysWOW64\1230\smss.exe
Size 117KB
SHA256 772b3e320fee31154f64b405f167e174d9482c64f9d24ba7c71b850eecb22c9c
MD5 3b2392f0989638591da752b9dd91af79
SHA1 861910c5c4bb80d1168b265c5a26647d8df28b89
SHA512 2cb7c610b8d55960a598544e9a224047166e0127bf72641515be2fcbad6711f9503721d830b4e1d459e42e76a508f5890a676ba02857171f0b75f14eed2fe20a
SSDEEP 3072:OE9j8b3ZXgKC1hX//iASOXRJzDOD26j/3xKQ:OEebiKuX//iZOXRJ3OD26jZn
MD5 SHA1 SHA512 SSDEEP

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memory/976-0-0x0000000000400000-0x000000000041F000-memory.dmp

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