b16b8ca2ec151d50e0b4e101b9af43ca5865d307abd4ca64ac6945ce4ae7d3e6

Analysis

max time kernel
150s
max time network
148s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
09-10-2024 02:21

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General

Target

b16b8ca2ec151d50e0b4e101b9af43ca5865d307abd4ca64ac6945ce4ae7d3e6.exe
Size

30KB
MD5

b3231fd0869e7516b90662051e8f86ec
SHA1

acf9550e30aac38f153395539100102118c7208e
SHA256

b16b8ca2ec151d50e0b4e101b9af43ca5865d307abd4ca64ac6945ce4ae7d3e6
SHA512

c548edf303447d34df6ef86bf95934f501ac637ae3904234144612fc057b1b22b38d6138ab53bd1c111ee0b38f04bbb46e9f6c1d3deb99840352ed8aced42c33
SSDEEP

384:bM7Q0pjC4GybxMv01d3AcASBQMf6i/zzzcYgUPSznStL:b/yC4GyNM01GuQMNXw2PSjSx

Score

7^/10

discovery

Malware Config

Signatures

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-1-5-21-4050598569-1597076380-177084960-1000\Control Panel\International\Geo\Nation	b16b8ca2ec151d50e0b4e101b9af43ca5865d307abd4ca64ac6945ce4ae7d3e6.exe

Executes dropped EXE 1 IoCs

pid	Process
4152	retln.exe

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 2 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	b16b8ca2ec151d50e0b4e101b9af43ca5865d307abd4ca64ac6945ce4ae7d3e6.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	retln.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 3532 wrote to memory of 4152	3532	b16b8ca2ec151d50e0b4e101b9af43ca5865d307abd4ca64ac6945ce4ae7d3e6.exe	87
PID 3532 wrote to memory of 4152	3532	b16b8ca2ec151d50e0b4e101b9af43ca5865d307abd4ca64ac6945ce4ae7d3e6.exe	87
PID 3532 wrote to memory of 4152	3532	b16b8ca2ec151d50e0b4e101b9af43ca5865d307abd4ca64ac6945ce4ae7d3e6.exe	87

C:\Users\Admin\AppData\Local\Temp\b16b8ca2ec151d50e0b4e101b9af43ca5865d307abd4ca64ac6945ce4ae7d3e6.exe
"C:\Users\Admin\AppData\Local\Temp\b16b8ca2ec151d50e0b4e101b9af43ca5865d307abd4ca64ac6945ce4ae7d3e6.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3532
- C:\Users\Admin\AppData\Local\Temp\retln.exe
  "C:\Users\Admin\AppData\Local\Temp\retln.exe"
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  PID:4152

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\retln.exe

Filesize
30KB

MD5
06822cde8f44b6f342a22b17ce1b5345

SHA1
d615a0a8e94d8d567a62a61368d069db69ebf0fa

SHA256
1915ab277274716787170e0a9b08db638540766228b405ae1aba87817ee091ad

SHA512
7feec5322a00b32134fa5543dcd011f6edcd58dc084230ef5b01349a7546d06e23b2432162f9b5a4618c54977eabb9fb9615dcfa53fb3a8a29b3d7da364af4a6

Download Submit
memory/3532-0-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

Filesize
24KB

Download
memory/3532-1-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

Filesize
24KB

Download
memory/3532-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/4152-25-0x00000000020F0000-0x00000000020F6000-memory.dmp

Filesize
24KB

Download