489cad4cc47271135162208780dcf68391af102c27aded24bdd4de5ac3c334a4

Analysis

max time kernel
150s
max time network
156s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
25/03/2024, 12:26

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General

Target

2024-03-25_1433989e8e4e108ec4c181c4c679ed59_cryptolocker.exe
Size

118KB
MD5

1433989e8e4e108ec4c181c4c679ed59
SHA1

b4a58629b709eca71dc3595be526df919951a1ca
SHA256

489cad4cc47271135162208780dcf68391af102c27aded24bdd4de5ac3c334a4
SHA512

bbe1bf0be36d4d717f347a9fede9baa79fba2f6d87bc1b5f0d740ed43cb6dc9787209a31a57b80a3af2476f7fe59a3be470e7797139a52c3cfc344cb057e9421
SSDEEP

1536:z6QFElP6n+gKmddpMOtEvwDpj3GYQbN/PKwNgp01Qatb:z6a+CdOOtEvwDpjczT

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/4796-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000700000002322b-13.dat	CryptoLocker_rule2
behavioral2/memory/4796-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1756-25-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/4796-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000700000002322b-13.dat	CryptoLocker_set1
behavioral2/memory/4796-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1756-25-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/4796-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000700000002322b-13.dat	UPX
behavioral2/memory/4796-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/1756-25-0x0000000000500000-0x0000000000510000-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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-557049126-2506969350-2798870634-1000\Control Panel\International\Geo\Nation	2024-03-25_1433989e8e4e108ec4c181c4c679ed59_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1756	asih.exe

UPX packed file 4 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral2/memory/4796-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x000700000002322b-13.dat	upx
behavioral2/memory/4796-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/1756-25-0x0000000000500000-0x0000000000510000-memory.dmp	upx

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

System Information Discovery
T1082

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 4796 wrote to memory of 1756	4796	2024-03-25_1433989e8e4e108ec4c181c4c679ed59_cryptolocker.exe	91
PID 4796 wrote to memory of 1756	4796	2024-03-25_1433989e8e4e108ec4c181c4c679ed59_cryptolocker.exe	91
PID 4796 wrote to memory of 1756	4796	2024-03-25_1433989e8e4e108ec4c181c4c679ed59_cryptolocker.exe	91

C:\Users\Admin\AppData\Local\Temp\2024-03-25_1433989e8e4e108ec4c181c4c679ed59_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-25_1433989e8e4e108ec4c181c4c679ed59_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4796
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1756

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

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Downloads

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

Filesize
118KB

MD5
de68ec66669008f459d979daa1b12745

SHA1
c375c3873b365cc03d364f395d278c9ac1987981

SHA256
131c0f37de246269084057cd71fd2c4954cbe62f95a06d61b3222f573501b79a

SHA512
2e100d809db3ba3f2c160e93f7d118fe03135d507c9ce5670ad22c1882a4c66382c447f3ab80846fdd4eb9a7992a219252d71bbed533e127809ce39b2b0ee554

Download Submit
memory/1756-25-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4796-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4796-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/4796-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/4796-3-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/4796-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download