36c5a33923a20f5ae4f91ce751c4263791d271c6e1d3675f9e6f97155334594b

Analysis

max time kernel
140s
max time network
128s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
11/08/2024, 17:12

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General

Target

ReplaceIAT.dll
Size

98KB
MD5

b4605ce87bb8706ab4d6117581944d6a
SHA1

8de7743b4901b48154a6457e02fc7d8b3905b79b
SHA256

30f390ba154521c67fec87486a2a82e6240a0eb24223a9009115cf5098fcb7d9
SHA512

d25c8374175b906f28269e49881361a260e7a2a094a225a6209c5ea51d6383958430ee47db3d3be2bc9b23e757332f02021b6ffc75155e619dbc4d5bf1606d1b
SSDEEP

3072:atA5jWDxMLRd4liaO9TfvxtaaHBZDfta:atA5jWs8l09jvPZB

Score

7^/10

discovery

Malware Config

Signatures

Loads dropped DLL 3 IoCs

pid	Process
2852	rundll32.exe
2852	rundll32.exe
2852	rundll32.exe

Drops file in System32 directory 4 IoCs

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

System Location Discovery: System Language Discovery 1 TTPs 1 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	rundll32.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 2428 wrote to memory of 2852	2428	rundll32.exe	91
PID 2428 wrote to memory of 2852	2428	rundll32.exe	91
PID 2428 wrote to memory of 2852	2428	rundll32.exe	91

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\ReplaceIAT.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2428
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\ReplaceIAT.dll,#1
  2⤵
  - Loads dropped DLL
  - Drops file in System32 directory
  - System Location Discovery: System Language Discovery
  PID:2852

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --field-trial-handle=4288,i,5469445176230119590,7931734017267321834,262144 --variations-seed-version --mojo-platform-channel-handle=3756 /prefetch:8
1⤵
PID:2928

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Windows\SysWOW64\ws.dll

Filesize
388KB

MD5
8d7db101a7211fe3309dc4dc8cf2dd0a

SHA1
6c2781eadf53b3742d16dab2f164baf813f7ac85

SHA256
93db7c9699594caa19490280842fbebec3877278c92128b92e63d75fcd01397a

SHA512
8b139d447068519997f7bbc2c7c2fe3846b89ae1fba847258277c9ab92a93583b28fae7ffa444768929ed5852cc914c0270446cbf0bd20aca49bde6b6f809c83

Download Submit
C:\Windows\SysWOW64\wsGdi.dll

Filesize
137KB

MD5
f6b847a54cfb804a25b8842b45fd1d50

SHA1
bb22fef07ce1577c8a7fa057d8cf05502c013bfc

SHA256
5dd2f5a957946e0b6f63660ebd897851aad4795d4c847396c47ddbb647715583

SHA512
dd08a55f538e2a33e6a0c496dc97ae9045594cbbf62f7894ae8ded63f4dc0b2e89c5935269adfd1c19607b1d2474bddc49f6acb955e6dc53a55560663ca2137a

Download Submit
C:\Windows\SysWOW64\wskernal.dll

Filesize
625KB

MD5
eccf28d7e5ccec24119b88edd160f8f4

SHA1
98509587a3d37a20b56b50fd57f823a1691a034c

SHA256
820c83c0533cfce2928e29edeaf6c255bc19ac9718b25a5656d99ffac30a03d6

SHA512
c1c94bbb781625b2317f0a8178d3a10d891fb71bca8f82cd831c484e8ab125301b82a14fe2ff070dc99a496cc00234300fa5536401018c40d49d44ae89409670

Download Submit
memory/2852-0-0x0000000010000000-0x0000000010042000-memory.dmp

Filesize
264KB

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