4e5fbedd2e47dec34893e5060230e6d409410cf9e000307c5e92a5000629b456

Analysis

max time kernel
152s
max time network
162s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
23-11-2022 21:21

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General

Target

4e5fbedd2e47dec34893e5060230e6d409410cf9e000307c5e92a5000629b456.exe
Size

142KB
MD5

3924b8ba6208fa5c4a290971e7922c39
SHA1

41e8142fd3e2b96aa7de8725c985010dd1f0c1d7
SHA256

4e5fbedd2e47dec34893e5060230e6d409410cf9e000307c5e92a5000629b456
SHA512

8ca19cea4b0512c4e498e072e709b57d6654ee1599a7b7e0f59209e316cb87bc6a66ecd54a1686140d745461848e83c880e48e0b4c2ad85ef12cc15d9c84f2ec
SSDEEP

3072:1ix5XnHSNwVR6vW6nNQAUrTrogAaU/eTQyBnykmNsNl0WiuxzO/Y5uk3:1iTXuKUn2X5A2tyfDWlP

Score

8^/10

persistence

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
3492	winlogon.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-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation	4e5fbedd2e47dec34893e5060230e6d409410cf9e000307c5e92a5000629b456.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-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run	winlogon.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\winlogon.exe = "C:\\Users\\Admin\\AppData\\Roaming\\Microsoft\\winlogon.exe"	winlogon.exe

Enumerates connected drives 3 TTPs 22 IoCs

Attempts to read the root path of hard drives other than the default C: drive.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

description	ioc	Process
File opened (read-only)	\??\T:	winlogon.exe
File opened (read-only)	\??\S:	winlogon.exe
File opened (read-only)	\??\E:	winlogon.exe
File opened (read-only)	\??\F:	winlogon.exe
File opened (read-only)	\??\I:	winlogon.exe
File opened (read-only)	\??\J:	winlogon.exe
File opened (read-only)	\??\L:	winlogon.exe
File opened (read-only)	\??\N:	winlogon.exe
File opened (read-only)	\??\Q:	winlogon.exe
File opened (read-only)	\??\U:	winlogon.exe
File opened (read-only)	\??\V:	winlogon.exe
File opened (read-only)	\??\O:	winlogon.exe
File opened (read-only)	\??\P:	winlogon.exe
File opened (read-only)	\??\R:	winlogon.exe
File opened (read-only)	\??\Y:	winlogon.exe
File opened (read-only)	\??\Z:	winlogon.exe
File opened (read-only)	\??\G:	winlogon.exe
File opened (read-only)	\??\H:	winlogon.exe
File opened (read-only)	\??\K:	winlogon.exe
File opened (read-only)	\??\M:	winlogon.exe
File opened (read-only)	\??\W:	winlogon.exe
File opened (read-only)	\??\X:	winlogon.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\	4e5fbedd2e47dec34893e5060230e6d409410cf9e000307c5e92a5000629b456.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 4804 wrote to memory of 3492	4804	4e5fbedd2e47dec34893e5060230e6d409410cf9e000307c5e92a5000629b456.exe	84
PID 4804 wrote to memory of 3492	4804	4e5fbedd2e47dec34893e5060230e6d409410cf9e000307c5e92a5000629b456.exe	84
PID 4804 wrote to memory of 3492	4804	4e5fbedd2e47dec34893e5060230e6d409410cf9e000307c5e92a5000629b456.exe	84

C:\Users\Admin\AppData\Local\Temp\4e5fbedd2e47dec34893e5060230e6d409410cf9e000307c5e92a5000629b456.exe
"C:\Users\Admin\AppData\Local\Temp\4e5fbedd2e47dec34893e5060230e6d409410cf9e000307c5e92a5000629b456.exe"
1⤵
- Checks computer location settings
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:4804
- C:\Users\Admin\AppData\Roaming\Microsoft\winlogon.exe
  "C:\Users\Admin\AppData\Roaming\Microsoft\winlogon.exe"
  2⤵
  - Executes dropped EXE
  - Adds Run key to start application
  - Enumerates connected drives
  PID:3492

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

Peripheral Device Discovery

T1120

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\Microsoft\winlogon.exe

Filesize
142KB

MD5
3924b8ba6208fa5c4a290971e7922c39

SHA1
41e8142fd3e2b96aa7de8725c985010dd1f0c1d7

SHA256
4e5fbedd2e47dec34893e5060230e6d409410cf9e000307c5e92a5000629b456

SHA512
8ca19cea4b0512c4e498e072e709b57d6654ee1599a7b7e0f59209e316cb87bc6a66ecd54a1686140d745461848e83c880e48e0b4c2ad85ef12cc15d9c84f2ec

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\winlogon.exe

Filesize
142KB

MD5
3924b8ba6208fa5c4a290971e7922c39

SHA1
41e8142fd3e2b96aa7de8725c985010dd1f0c1d7

SHA256
4e5fbedd2e47dec34893e5060230e6d409410cf9e000307c5e92a5000629b456

SHA512
8ca19cea4b0512c4e498e072e709b57d6654ee1599a7b7e0f59209e316cb87bc6a66ecd54a1686140d745461848e83c880e48e0b4c2ad85ef12cc15d9c84f2ec

Download Submit
memory/3492-133-0x0000000000000000-mapping.dmp

Download
memory/3492-137-0x0000000011490000-0x00000000114BB000-memory.dmp

Filesize
172KB

Download
memory/3492-138-0x0000000011490000-0x00000000114BB000-memory.dmp

Filesize
172KB

Download
memory/4804-132-0x0000000011490000-0x00000000114BB000-memory.dmp

Filesize
172KB

Download
memory/4804-136-0x0000000011490000-0x00000000114BB000-memory.dmp

Filesize
172KB

Download

Analysis

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General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads