8a4861bdd132428f48b9d16c68499dc9e0b86b3f3139e8e885f71cb20678afa3

Analysis

max time kernel
139s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20221111-en
resource tags

arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
submitted
21/11/2022, 15:24

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General

Target

8a4861bdd132428f48b9d16c68499dc9e0b86b3f3139e8e885f71cb20678afa3.exe
Size

109KB
MD5

138843f61be236e30496df935af8d960
SHA1

813a3a1a3fec6cc6b676e734c170b0fa931ff426
SHA256

8a4861bdd132428f48b9d16c68499dc9e0b86b3f3139e8e885f71cb20678afa3
SHA512

f20edac6c95f8ff088cfd3b25e12ac99d479044ed4733749ce79f2818eabf757e12e33001356d02e831781fc2babd105b6acf7d86700d9b5c9c94bf5453d7ebd
SSDEEP

3072:7S8BCfoDaXJNMX6myy3wWC02oXUPafyLl:7PB6E5B3802oXUPafyJ

Score

8^/10

persistence

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
1304	NvdUpd.exe

Loads dropped DLL 1 IoCs

pid	Process
4244	8a4861bdd132428f48b9d16c68499dc9e0b86b3f3139e8e885f71cb20678afa3.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\Software\Microsoft\Windows\CurrentVersion\Run	8a4861bdd132428f48b9d16c68499dc9e0b86b3f3139e8e885f71cb20678afa3.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\NvUpdSrv = "C:\\Users\\Admin\\AppData\\Local\\NVIDIA Corporation\\Updates\\NvdUpd.exe"	8a4861bdd132428f48b9d16c68499dc9e0b86b3f3139e8e885f71cb20678afa3.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
1892	1304	WerFault.exe	85

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 4244 wrote to memory of 1304	4244	8a4861bdd132428f48b9d16c68499dc9e0b86b3f3139e8e885f71cb20678afa3.exe	85
PID 4244 wrote to memory of 1304	4244	8a4861bdd132428f48b9d16c68499dc9e0b86b3f3139e8e885f71cb20678afa3.exe	85
PID 4244 wrote to memory of 1304	4244	8a4861bdd132428f48b9d16c68499dc9e0b86b3f3139e8e885f71cb20678afa3.exe	85

C:\Users\Admin\AppData\Local\Temp\8a4861bdd132428f48b9d16c68499dc9e0b86b3f3139e8e885f71cb20678afa3.exe
"C:\Users\Admin\AppData\Local\Temp\8a4861bdd132428f48b9d16c68499dc9e0b86b3f3139e8e885f71cb20678afa3.exe"
1⤵
- Loads dropped DLL
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:4244
- C:\Users\Admin\AppData\Local\NVIDIA Corporation\Updates\NvdUpd.exe
  "C:\Users\Admin\AppData\Local\NVIDIA Corporation\Updates\NvdUpd.exe"
  2⤵
  - Executes dropped EXE
  PID:1304
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 1304 -s 408
    3⤵
    - Program crash
    PID:1892

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 480 -p 1304 -ip 1304
1⤵
PID:3668

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\NVIDIA Corporation\Updates\NvdUpd.exe

Filesize
85KB

MD5
6fb73663739dc61b499261241442b1b0

SHA1
0011bcf9178a199554f4bbe81a93920229aee7eb

SHA256
039f118d26aa33a60b365d9da21cf5b149e4a0d3f0f50667892cccb09dcae06c

SHA512
712d5c60920733d5c46c3694f7df7566c429c0b8be37df39d929de0ce4d1aac8ae8f7dd53af94b091b95b0ddd9eb61a429299516624308d748bbd14774573f92

Download Submit
C:\Users\Admin\AppData\Local\NVIDIA Corporation\Updates\NvdUpd.exe

Filesize
85KB

MD5
6fb73663739dc61b499261241442b1b0

SHA1
0011bcf9178a199554f4bbe81a93920229aee7eb

SHA256
039f118d26aa33a60b365d9da21cf5b149e4a0d3f0f50667892cccb09dcae06c

SHA512
712d5c60920733d5c46c3694f7df7566c429c0b8be37df39d929de0ce4d1aac8ae8f7dd53af94b091b95b0ddd9eb61a429299516624308d748bbd14774573f92

Download Submit
C:\Users\Admin\AppData\Local\Temp\nsq7EBC.tmp\System.dll

Filesize
11KB

MD5
c17103ae9072a06da581dec998343fc1

SHA1
b72148c6bdfaada8b8c3f950e610ee7cf1da1f8d

SHA256
dc58d8ad81cacb0c1ed72e33bff8f23ea40b5252b5bb55d393a0903e6819ae2f

SHA512
d32a71aaef18e993f28096d536e41c4d016850721b31171513ce28bbd805a54fd290b7c3e9d935f72e676a1acfb4f0dcc89d95040a0dd29f2b6975855c18986f

Download Submit