be435e68230b757d9af29b505491ac9e690c9755e08e2bd6310059bc333436d2

Analysis

max time kernel
148s
max time network
168s
platform
windows7_x64
resource
win7-20231020-en
resource tags

arch:x64arch:x86image:win7-20231020-enlocale:en-usos:windows7-x64system
submitted
21-10-2023 21:29

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General

Target

NEAS.b3f2134f96f805f0689064040af619f0.dll
Size

71KB
MD5

b3f2134f96f805f0689064040af619f0
SHA1

457c1a5b44efa85d83a274338587b3111f92a700
SHA256

be435e68230b757d9af29b505491ac9e690c9755e08e2bd6310059bc333436d2
SHA512

d6dcc502b75e607a5efe245d88abe63cda41bb6025780b66f0cbf7c637ea0afed22dd61e188f788a0d238fc924037b7fdf1b43c342ba39503b32400b780d6f27
SSDEEP

768:pdGvJuh5Zve0szqVzvM+SzdGHGv8x7NjoUIjCmca9Fuhcm19IGuVlugWIuzjL3dv:pchqZGzEMhMt+0a9ghrY2jR/oxq

Score

8^/10

persistence

Malware Config

Signatures

Sets DLL path for service in the registry 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\Unicode_Normalization\Parameters\ServiceDll = "C:\\Windows\\system32\\msvcrts.dll"	rundll32.exe

Loads dropped DLL 1 IoCs

pid	Process
1520	svchost.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\msvcrts.dll	rundll32.exe
File opened for modification	C:\Windows\SysWOW64\msvcrts.dll	rundll32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 1140 wrote to memory of 292	1140	rundll32.exe	28
PID 1140 wrote to memory of 292	1140	rundll32.exe	28
PID 1140 wrote to memory of 292	1140	rundll32.exe	28
PID 1140 wrote to memory of 292	1140	rundll32.exe	28
PID 1140 wrote to memory of 292	1140	rundll32.exe	28
PID 1140 wrote to memory of 292	1140	rundll32.exe	28
PID 1140 wrote to memory of 292	1140	rundll32.exe	28

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\NEAS.b3f2134f96f805f0689064040af619f0.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1140
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\NEAS.b3f2134f96f805f0689064040af619f0.dll,#1
  2⤵
  - Sets DLL path for service in the registry
  - Drops file in System32 directory
  PID:292

C:\Windows\SysWOW64\svchost.exe
C:\Windows\SysWOW64\svchost.exe -k netsvcs
1⤵
- Loads dropped DLL
PID:1520

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

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

\??\c:\windows\SysWOW64\msvcrts.dll

Filesize
71KB

MD5
b3f2134f96f805f0689064040af619f0

SHA1
457c1a5b44efa85d83a274338587b3111f92a700

SHA256
be435e68230b757d9af29b505491ac9e690c9755e08e2bd6310059bc333436d2

SHA512
d6dcc502b75e607a5efe245d88abe63cda41bb6025780b66f0cbf7c637ea0afed22dd61e188f788a0d238fc924037b7fdf1b43c342ba39503b32400b780d6f27

Download Submit
\Windows\SysWOW64\msvcrts.dll

Filesize
71KB

MD5
b3f2134f96f805f0689064040af619f0

SHA1
457c1a5b44efa85d83a274338587b3111f92a700

SHA256
be435e68230b757d9af29b505491ac9e690c9755e08e2bd6310059bc333436d2

SHA512
d6dcc502b75e607a5efe245d88abe63cda41bb6025780b66f0cbf7c637ea0afed22dd61e188f788a0d238fc924037b7fdf1b43c342ba39503b32400b780d6f27

Download Submit
memory/292-3-0x00000000001A0000-0x00000000001B6000-memory.dmp

Filesize
88KB

Download
memory/1520-4-0x0000000000160000-0x0000000000176000-memory.dmp

Filesize
88KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads