c42f989cc93e7438485468781f120b1e3c93c4de311ccb2f252d32c83e4781e8

Analysis

max time kernel
94s
max time network
95s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
13/09/2024, 04:46

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General

Target

8f44351767e943bf9804ae4cdd613800N.exe
Size

38KB
MD5

8f44351767e943bf9804ae4cdd613800
SHA1

b00fa7c98ade8e990518b59ebfa74cdc9ed98d1f
SHA256

c42f989cc93e7438485468781f120b1e3c93c4de311ccb2f252d32c83e4781e8
SHA512

afb33c221405ed46df1fd3281e98ee793d3999e9107cccc7906eb26c6aa3080d494d6e9d7936fadb7330c4e41e1e1c87104053d521493b3e057303e0f3a3687e
SSDEEP

768:Nzj1JegVa3Gry+uELEmITCs/NUZ6nZdYbCLECkrQoP9fmF2f1cOi:NWQa2TLEmITcoQxfllfmS1cOi

Score

8^/10

discovery evasion execution upx

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
1416	smss.exe

UPX packed file 4 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral2/memory/1356-0-0x0000000000400000-0x0000000000422000-memory.dmp	upx
behavioral2/files/0x00080000000234c0-5.dat	upx
behavioral2/memory/1356-10-0x0000000000400000-0x0000000000422000-memory.dmp	upx
behavioral2/memory/1416-12-0x0000000000400000-0x0000000000422000-memory.dmp	upx

Drops file in System32 directory 3 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\1230\smss.exe	8f44351767e943bf9804ae4cdd613800N.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
2432	sc.exe
3248	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	8f44351767e943bf9804ae4cdd613800N.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	smss.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
1356	8f44351767e943bf9804ae4cdd613800N.exe
1416	smss.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 1356 wrote to memory of 2432	1356	8f44351767e943bf9804ae4cdd613800N.exe	84
PID 1356 wrote to memory of 2432	1356	8f44351767e943bf9804ae4cdd613800N.exe	84
PID 1356 wrote to memory of 2432	1356	8f44351767e943bf9804ae4cdd613800N.exe	84
PID 1356 wrote to memory of 1416	1356	8f44351767e943bf9804ae4cdd613800N.exe	86
PID 1356 wrote to memory of 1416	1356	8f44351767e943bf9804ae4cdd613800N.exe	86
PID 1356 wrote to memory of 1416	1356	8f44351767e943bf9804ae4cdd613800N.exe	86
PID 1416 wrote to memory of 3248	1416	smss.exe	88
PID 1416 wrote to memory of 3248	1416	smss.exe	88
PID 1416 wrote to memory of 3248	1416	smss.exe	88

C:\Users\Admin\AppData\Local\Temp\8f44351767e943bf9804ae4cdd613800N.exe
"C:\Users\Admin\AppData\Local\Temp\8f44351767e943bf9804ae4cdd613800N.exe"
1⤵
- Drops file in System32 directory
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1356
- C:\Windows\SysWOW64\sc.exe
  C:\Windows\system32\sc.exe stop wscsvc
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:2432
- 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:1416
- - C:\Windows\SysWOW64\sc.exe
    C:\Windows\system32\sc.exe stop wscsvc
    3⤵
    - Launches sc.exe
    - System Location Discovery: System Language Discovery
    PID:3248

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

Replay Monitor

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Downloads

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

Filesize
38KB

MD5
a395878bc1d6d2bb26c8f01394db23df

SHA1
6012779322e129c72ba241d93be4964abc63502e

SHA256
246c4f8514bac21630cfa38222f8f9cd044cc65d4ed64b3931f15f13389c338a

SHA512
b6667d52e0d65af6b6c6e7b7b142c836b4074a221e9990217b27177ffcb0dceba06d82c14d8c20cf8f59356553831512bde6f8ba3ed75ec2bd67b6abe0c4ec8b

Download Submit
memory/1356-0-0x0000000000400000-0x0000000000422000-memory.dmp

Filesize
136KB

Download
memory/1356-10-0x0000000000400000-0x0000000000422000-memory.dmp

Filesize
136KB

Download
memory/1416-12-0x0000000000400000-0x0000000000422000-memory.dmp

Filesize
136KB

Download