9692f4e36318faeaf3e1161e9bf98ae3d7adac4dca22510f12a38dbf387f5bca

Analysis

max time kernel
150s
max time network
156s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
12-02-2024 19:56

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General

Target

2024-02-12_48ad37f9b577cda7ab8b1de8b697e15a_cryptolocker.exe
Size

61KB
MD5

48ad37f9b577cda7ab8b1de8b697e15a
SHA1

6dccf034ed4d8a075e8502fd5f221f1c7853dd17
SHA256

9692f4e36318faeaf3e1161e9bf98ae3d7adac4dca22510f12a38dbf387f5bca
SHA512

8386f211168e5b59521870b65c0c86a0d79935bd8edae2a027faa8778b36d94124043b4fe0b424f6cf7e0b02989fddc6ec636df6770ada8a52b892bb0ecf9d59
SSDEEP

1536:qmbhXDmjr5MOtEvwDpj5cDtKkQZQRKb61vSbgts0:BbdDmjr+OtEvwDpjM88

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2120-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral2/memory/2120-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/988-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 2 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2120-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/988-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2120-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral2/memory/2120-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/988-26-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

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

Processes:

2024-02-12_48ad37f9b577cda7ab8b1de8b697e15a_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-983843758-932321429-1636175382-1000\Control Panel\International\Geo\Nation	2024-02-12_48ad37f9b577cda7ab8b1de8b697e15a_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

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

System Information Discovery
T1082

pid	process
988	asih.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2024-02-12_48ad37f9b577cda7ab8b1de8b697e15a_cryptolocker.exe

description	pid	process	target process
PID 2120 wrote to memory of 988	2120	2024-02-12_48ad37f9b577cda7ab8b1de8b697e15a_cryptolocker.exe	asih.exe
PID 2120 wrote to memory of 988	2120	2024-02-12_48ad37f9b577cda7ab8b1de8b697e15a_cryptolocker.exe	asih.exe
PID 2120 wrote to memory of 988	2120	2024-02-12_48ad37f9b577cda7ab8b1de8b697e15a_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-02-12_48ad37f9b577cda7ab8b1de8b697e15a_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-12_48ad37f9b577cda7ab8b1de8b697e15a_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2120

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:988

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

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

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

Filesize
61KB

MD5
7e6217e4d3e49d6daaf7b738d626b01b

SHA1
5ef644995a936dbebad6cd17232f3e0a75275304

SHA256
15e71a5eee9d42fd7f75074d33a0c207c03b256b69caa9fe244d083f7ea47e6f

SHA512
f252f878c152c73ed7976b5e53a343c35cbf5cf86b4de347e1419c12944671cbad2777f2bf65faf3b052f35c675d1ee3695cda823b2c10c687224c5b865748f7

Download Submit
memory/988-19-0x0000000002090000-0x0000000002096000-memory.dmp

Filesize
24KB

Download
memory/988-22-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/988-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2120-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2120-1-0x00000000007B0000-0x00000000007B6000-memory.dmp

Filesize
24KB

Download
memory/2120-2-0x00000000007B0000-0x00000000007B6000-memory.dmp

Filesize
24KB

Download
memory/2120-3-0x0000000002070000-0x0000000002076000-memory.dmp

Filesize
24KB

Download
memory/2120-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download