98878b16464ade54a25512a723efa9551c33ceaa3e756eea5bfc5933a905a19d

Analysis

max time kernel
186s
max time network
193s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
03-12-2022 16:48

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General

Target

98878b16464ade54a25512a723efa9551c33ceaa3e756eea5bfc5933a905a19d.exe
Size

146KB
MD5

c45cf03a5159c611d2bb20fc1863b4eb
SHA1

e32e390800f5938ca1f594001f61b3c08b9344f0
SHA256

98878b16464ade54a25512a723efa9551c33ceaa3e756eea5bfc5933a905a19d
SHA512

0955ca13ea31064426de9cb38af6d8944938bd3a7efc012e3826e68294d8665dc1a486a25d9c9067aa454d2fde9a48794fa09146b7723d1aed2c0c379021cd12
SSDEEP

3072:Drt5cvaFDJ1kM6SUwSvTlToS7gQrt5cvaFDJ1kWQEaCDNfE58bgMY3o:DTxFP6SUwSvTlT7TxFIEZDNp

Score

10^/10

evasion persistence

Malware Config

Signatures

Modifies firewall policy service 2 TTPs 4 IoCs

evasion

Modify Registry

T1112

Modify Existing Service

T1031

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List\C:\Users\Admin\M-1-52-5782-8754-5245\winsam.exe = "C:\\Users\\Admin\\M-1-52-5782-8754-5245\\winsam.exe:*:Enabled:Microsoft® Windows System"	98878b16464ade54a25512a723efa9551c33ceaa3e756eea5bfc5933a905a19d.exe
Key created	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List	98878b16464ade54a25512a723efa9551c33ceaa3e756eea5bfc5933a905a19d.exe
Key created	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile	98878b16464ade54a25512a723efa9551c33ceaa3e756eea5bfc5933a905a19d.exe
Key created	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications	98878b16464ade54a25512a723efa9551c33ceaa3e756eea5bfc5933a905a19d.exe

Executes dropped EXE 1 IoCs

pid	Process
4780	winsam.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\Control Panel\International\Geo\Nation	98878b16464ade54a25512a723efa9551c33ceaa3e756eea5bfc5933a905a19d.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Microsoft® Windows System = "C:\\Users\\Admin\\M-1-52-5782-8754-5245\\winsam.exe"	98878b16464ade54a25512a723efa9551c33ceaa3e756eea5bfc5933a905a19d.exe
Key created	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\Software\Microsoft\Windows\CurrentVersion\Run\	98878b16464ade54a25512a723efa9551c33ceaa3e756eea5bfc5933a905a19d.exe

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

System Information Discovery
T1082

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{1f3427c8-5c10-4210-aa03-2ee45287d668}\Instance\	98878b16464ade54a25512a723efa9551c33ceaa3e756eea5bfc5933a905a19d.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 2628 wrote to memory of 4780	2628	98878b16464ade54a25512a723efa9551c33ceaa3e756eea5bfc5933a905a19d.exe	81
PID 2628 wrote to memory of 4780	2628	98878b16464ade54a25512a723efa9551c33ceaa3e756eea5bfc5933a905a19d.exe	81
PID 2628 wrote to memory of 4780	2628	98878b16464ade54a25512a723efa9551c33ceaa3e756eea5bfc5933a905a19d.exe	81

C:\Users\Admin\AppData\Local\Temp\98878b16464ade54a25512a723efa9551c33ceaa3e756eea5bfc5933a905a19d.exe
"C:\Users\Admin\AppData\Local\Temp\98878b16464ade54a25512a723efa9551c33ceaa3e756eea5bfc5933a905a19d.exe"
1⤵
- Modifies firewall policy service
- Checks computer location settings
- Adds Run key to start application
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:2628
- C:\Users\Admin\M-1-52-5782-8754-5245\winsam.exe
  "C:\Users\Admin\M-1-52-5782-8754-5245\winsam.exe"
  2⤵
  - Executes dropped EXE
  PID:4780

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Modify Existing Service

T1031

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\M-1-52-5782-8754-5245\winsam.exe

Filesize
146KB

MD5
c45cf03a5159c611d2bb20fc1863b4eb

SHA1
e32e390800f5938ca1f594001f61b3c08b9344f0

SHA256
98878b16464ade54a25512a723efa9551c33ceaa3e756eea5bfc5933a905a19d

SHA512
0955ca13ea31064426de9cb38af6d8944938bd3a7efc012e3826e68294d8665dc1a486a25d9c9067aa454d2fde9a48794fa09146b7723d1aed2c0c379021cd12

Download Submit
C:\Users\Admin\M-1-52-5782-8754-5245\winsam.exe

Filesize
146KB

MD5
c45cf03a5159c611d2bb20fc1863b4eb

SHA1
e32e390800f5938ca1f594001f61b3c08b9344f0

SHA256
98878b16464ade54a25512a723efa9551c33ceaa3e756eea5bfc5933a905a19d

SHA512
0955ca13ea31064426de9cb38af6d8944938bd3a7efc012e3826e68294d8665dc1a486a25d9c9067aa454d2fde9a48794fa09146b7723d1aed2c0c379021cd12

Download Submit
memory/2628-132-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/4780-136-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads