215d58a5a69a616cc04b5f8542ec46f4463cba6c8f6eac56978682d4da0ec142

Analysis

max time kernel
14s
max time network
63s
platform
windows7_x64
resource
win7-20241010-en
resource tags

arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-x64system
submitted
02-11-2024 06:20

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General

Target

2024-11-02_bac6711350616fd27a3177645e3ab4d5_cryptolocker.exe
Size

34KB
MD5

bac6711350616fd27a3177645e3ab4d5
SHA1

57c77da2155a7701a0b4f605f152bfb77997d5dc
SHA256

215d58a5a69a616cc04b5f8542ec46f4463cba6c8f6eac56978682d4da0ec142
SHA512

196973c0b0775e9c0fdfe14eec91dcc8005b6958c99ae102c2b79956216d1414e6c333d56596fd368dbd54f70e33144b98aeba4856bdf03b750aab18a1f4c41c
SSDEEP

384:bM7Q0pjC4GybxMv01d3AcASBQMf6i/zzzcYgUPSznStEkcsgYKT:b/yC4GyNM01GuQMNXw2PSjSKkcJYKT

Score

7^/10

discovery

Malware Config

Signatures

Executes dropped EXE 1 IoCs

Processes:

retln.exe

pid process

1456 retln.exe
Loads dropped DLL 1 IoCs

Processes:

2024-11-02_bac6711350616fd27a3177645e3ab4d5_cryptolocker.exe

pid process

1688 2024-11-02_bac6711350616fd27a3177645e3ab4d5_cryptolocker.exe
Creates a large amount of network flows 1 TTPs
This may indicate a network scan to discover remotely running services.
discovery

Network Service Discovery
T1046
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
1456	retln.exe

pid	process
1688	2024-11-02_bac6711350616fd27a3177645e3ab4d5_cryptolocker.exe

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

Processes:

2024-11-02_bac6711350616fd27a3177645e3ab4d5_cryptolocker.exeretln.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2024-11-02_bac6711350616fd27a3177645e3ab4d5_cryptolocker.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	retln.exe

Suspicious use of UnmapMainImage 2 IoCs

Processes:

2024-11-02_bac6711350616fd27a3177645e3ab4d5_cryptolocker.exeretln.exe

pid process

1688 2024-11-02_bac6711350616fd27a3177645e3ab4d5_cryptolocker.exe
1456 retln.exe

pid	process
1688	2024-11-02_bac6711350616fd27a3177645e3ab4d5_cryptolocker.exe
1456	retln.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

2024-11-02_bac6711350616fd27a3177645e3ab4d5_cryptolocker.exe

description	pid	process	target process
PID 1688 wrote to memory of 1456	1688	2024-11-02_bac6711350616fd27a3177645e3ab4d5_cryptolocker.exe	retln.exe
PID 1688 wrote to memory of 1456	1688	2024-11-02_bac6711350616fd27a3177645e3ab4d5_cryptolocker.exe	retln.exe
PID 1688 wrote to memory of 1456	1688	2024-11-02_bac6711350616fd27a3177645e3ab4d5_cryptolocker.exe	retln.exe
PID 1688 wrote to memory of 1456	1688	2024-11-02_bac6711350616fd27a3177645e3ab4d5_cryptolocker.exe	retln.exe

C:\Users\Admin\AppData\Local\Temp\2024-11-02_bac6711350616fd27a3177645e3ab4d5_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-11-02_bac6711350616fd27a3177645e3ab4d5_cryptolocker.exe"
1⤵
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:1688

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
- Suspicious use of UnmapMainImage
PID:1456

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Network Service Discovery

T1046

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
34KB

MD5
7c687775753294e8f0c5b6ae5b52786f

SHA1
d5a1e8079708f021d1620eeb92b0a09e2b7410ea

SHA256
c9bc9f3d23cded5a06b959f67b423812121b8d48f70a37b0e03b243fffef29ad

SHA512
36d752cb40793f55480ea27083d061da947991ab91118dc9fbb60b82e176da02ce91bcb3cb4813e8480198d84b3eded186ee0a5af97b16398551d0048c700ea1

Download Submit
memory/1456-18-0x00000000003C0000-0x00000000003C6000-memory.dmp

Filesize
24KB

Download
memory/1688-0-0x0000000000340000-0x0000000000346000-memory.dmp

Filesize
24KB

Download
memory/1688-8-0x0000000000340000-0x0000000000346000-memory.dmp

Filesize
24KB

Download
memory/1688-1-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download