b9f723a888dcbfe931bdc979e6f9b6b7c26cfac1909e7a9a1a02c358421dd721

Analysis

max time kernel
51s
max time network
52s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
17/06/2024, 01:30

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General

Target

b9f723a888dcbfe931bdc979e6f9b6b7c26cfac1909e7a9a1a02c358421dd721.exe
Size

138KB
MD5

5d8d92fbda0b38017fd587d050d31b9d
SHA1

85435615eed52c53accc0f4d421a0fef76de08f9
SHA256

b9f723a888dcbfe931bdc979e6f9b6b7c26cfac1909e7a9a1a02c358421dd721
SHA512

d6b1a3cee19d6d27f7aba480551b8203c1ffac88425ec4557c81aef7629aa974068af64005a9233bcb78c3364416b941edeb650049322b475ded800f654449cd
SSDEEP

1536:rC2/fYuPfbESFYXRWhpKRycRd57JkIqFHhzm4hWru/BzihhMN45MF5FvHP132xPY:r7YubEwYXRWhpAJUHhzm4hUukS6Kmecq

Score

8^/10

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
2880	smss.exe

Drops file in System32 directory 3 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\1230\smss.exe	b9f723a888dcbfe931bdc979e6f9b6b7c26cfac1909e7a9a1a02c358421dd721.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 4 IoCs

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

pid	Process
4352	sc.exe
2816	sc.exe
3708	sc.exe
4160	sc.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
8	b9f723a888dcbfe931bdc979e6f9b6b7c26cfac1909e7a9a1a02c358421dd721.exe
2880	smss.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 8 wrote to memory of 4352	8	b9f723a888dcbfe931bdc979e6f9b6b7c26cfac1909e7a9a1a02c358421dd721.exe	81
PID 8 wrote to memory of 4352	8	b9f723a888dcbfe931bdc979e6f9b6b7c26cfac1909e7a9a1a02c358421dd721.exe	81
PID 8 wrote to memory of 4352	8	b9f723a888dcbfe931bdc979e6f9b6b7c26cfac1909e7a9a1a02c358421dd721.exe	81
PID 8 wrote to memory of 2816	8	b9f723a888dcbfe931bdc979e6f9b6b7c26cfac1909e7a9a1a02c358421dd721.exe	83
PID 8 wrote to memory of 2816	8	b9f723a888dcbfe931bdc979e6f9b6b7c26cfac1909e7a9a1a02c358421dd721.exe	83
PID 8 wrote to memory of 2816	8	b9f723a888dcbfe931bdc979e6f9b6b7c26cfac1909e7a9a1a02c358421dd721.exe	83
PID 8 wrote to memory of 2880	8	b9f723a888dcbfe931bdc979e6f9b6b7c26cfac1909e7a9a1a02c358421dd721.exe	85
PID 8 wrote to memory of 2880	8	b9f723a888dcbfe931bdc979e6f9b6b7c26cfac1909e7a9a1a02c358421dd721.exe	85
PID 8 wrote to memory of 2880	8	b9f723a888dcbfe931bdc979e6f9b6b7c26cfac1909e7a9a1a02c358421dd721.exe	85
PID 2880 wrote to memory of 3708	2880	smss.exe	86
PID 2880 wrote to memory of 3708	2880	smss.exe	86
PID 2880 wrote to memory of 3708	2880	smss.exe	86
PID 2880 wrote to memory of 4160	2880	smss.exe	88
PID 2880 wrote to memory of 4160	2880	smss.exe	88
PID 2880 wrote to memory of 4160	2880	smss.exe	88

C:\Users\Admin\AppData\Local\Temp\b9f723a888dcbfe931bdc979e6f9b6b7c26cfac1909e7a9a1a02c358421dd721.exe
"C:\Users\Admin\AppData\Local\Temp\b9f723a888dcbfe931bdc979e6f9b6b7c26cfac1909e7a9a1a02c358421dd721.exe"
1⤵
- Drops file in System32 directory
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:8
- C:\Windows\SysWOW64\sc.exe
  C:\Windows\system32\sc.exe stop SharedAccess
  2⤵
  - Launches sc.exe
  PID:4352
- C:\Windows\SysWOW64\sc.exe
  C:\Windows\system32\sc.exe stop wscsvc
  2⤵
  - Launches sc.exe
  PID:2816
- C:\Windows\SysWOW64\1230\smss.exe
  C:\Windows\system32\1230\smss.exe -d
  2⤵
  - Executes dropped EXE
  - Drops file in System32 directory
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2880
- - C:\Windows\SysWOW64\sc.exe
    C:\Windows\system32\sc.exe stop SharedAccess
    3⤵
    - Launches sc.exe
    PID:3708
- - C:\Windows\SysWOW64\sc.exe
    C:\Windows\system32\sc.exe stop wscsvc
    3⤵
    - Launches sc.exe
    PID:4160

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

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Service Stop

T1489

Replay Monitor

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Downloads

C:\Windows\SysWOW64\1230\smss.exe

Filesize
138KB

MD5
4ed9e19c595791d3a4a91e4a8e0cd57c

SHA1
814dc12ce4e6ee2702f03357f90cb8942c8e97f9

SHA256
e1bcef9d57b1ace3025f184652cff10dbd9bd203524a57ff49da9d7fb173bff5

SHA512
ddf70651ca6169273891be16e03a4cfab882c70d07cd6a85cf51bf50bbf3ad66c70df9a7bcf9f69f1a33bd916aec25fce4a3ea14186746cd01490058cb9702b5

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