c9c6eacbf5f45fbcf1fa82da42f30df7410a5fb8e6d09625df820a8c8f4ff0e0

Analysis

max time kernel
148s
max time network
150s
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 20:07

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General

Target

2024-02-12_92b44da8c76379fa5a1ee898d48654d4_cryptolocker.exe
Size

46KB
MD5

92b44da8c76379fa5a1ee898d48654d4
SHA1

896cfa13724e72eea029c45e8cb77b62a85ff450
SHA256

c9c6eacbf5f45fbcf1fa82da42f30df7410a5fb8e6d09625df820a8c8f4ff0e0
SHA512

7b7b4e105e59790082fd811ea2933dffef9a28fab1fa92b524063ff3de84f28728f5fd3449d3388b2f115788fe19fd6a30bd6ccd4531bd6f2cb42609d0f28976
SSDEEP

768:qmOKYQDf5XdrDmjr5tOOtEvwDpjAajFEitQbDmoSQCVUBJUkQqAHBIG05WTBV:qmbhXDmjr5MOtEvwDpj5cDtKkQZQ6z

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/3160-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral2/memory/3160-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3640-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 2 IoCs

Processes:

resource	yara_rule
behavioral2/memory/3160-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3640-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/3160-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral2/memory/3160-16-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/3640-26-0x0000000000500000-0x0000000000510000-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_92b44da8c76379fa5a1ee898d48654d4_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3791175113-1062217823-1177695025-1000\Control Panel\International\Geo\Nation	2024-02-12_92b44da8c76379fa5a1ee898d48654d4_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

3640 asih.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
3640	asih.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2024-02-12_92b44da8c76379fa5a1ee898d48654d4_cryptolocker.exe

description	pid	process	target process
PID 3160 wrote to memory of 3640	3160	2024-02-12_92b44da8c76379fa5a1ee898d48654d4_cryptolocker.exe	asih.exe
PID 3160 wrote to memory of 3640	3160	2024-02-12_92b44da8c76379fa5a1ee898d48654d4_cryptolocker.exe	asih.exe
PID 3160 wrote to memory of 3640	3160	2024-02-12_92b44da8c76379fa5a1ee898d48654d4_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-02-12_92b44da8c76379fa5a1ee898d48654d4_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-12_92b44da8c76379fa5a1ee898d48654d4_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3160

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:3640

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
46KB

MD5
43b0e400aeb17dcd3702935aa253d79c

SHA1
1937ce6af30da8991ff5896939a1039448c836ff

SHA256
94f79f4102b46db8f3b190f2771c5b17fb84f07f26da50a50e1e36097e0f652b

SHA512
acae667d833e5bb2db3830d03ab2c67c8048c516dc4d0148cb5d334d34d0fa3d39c0ae08ade06e555f1d98da439f5eea313e1de3f40d8a8f587e47bf32a885c6

Download Submit
memory/3160-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3160-2-0x00000000007C0000-0x00000000007C6000-memory.dmp

Filesize
24KB

Download
memory/3160-1-0x00000000007C0000-0x00000000007C6000-memory.dmp

Filesize
24KB

Download
memory/3160-3-0x0000000002080000-0x0000000002086000-memory.dmp

Filesize
24KB

Download
memory/3160-16-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3640-19-0x00000000005D0000-0x00000000005D6000-memory.dmp

Filesize
24KB

Download
memory/3640-25-0x00000000005B0000-0x00000000005B6000-memory.dmp

Filesize
24KB

Download
memory/3640-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download