16d1dfbf001209d8a1f00382268e9a89d52b59483e28efbbb0c29695fa1b6885

Analysis

max time kernel
149s
max time network
155s
platform
windows10-2004_x64
resource
win10v2004-20240221-en
resource tags

arch:x64arch:x86image:win10v2004-20240221-enlocale:en-usos:windows10-2004-x64system
submitted
25/02/2024, 00:52

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General

Target

2024-02-25_b3353d9d2c24bd195f16ff843d3366c1_cryptolocker.exe
Size

64KB
MD5

b3353d9d2c24bd195f16ff843d3366c1
SHA1

e1a7496d0da92c24992a413bb3939a7c4a2db928
SHA256

16d1dfbf001209d8a1f00382268e9a89d52b59483e28efbbb0c29695fa1b6885
SHA512

b4d01b561740c2e6df5a70b091bf1c37d757a4499cbfa66a6040ecb56411796fa25eaf3d839f249bb99678174cc94f28e7f32d9914262c6f313b797aa0326157
SSDEEP

1536:P8mnK6QFElP6n+gymddpMOtEvwDpjY6UnU5:1nK6a+qdOOtEvwDpjN

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/4528-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x00060000000231f6-13.dat	CryptoLocker_rule2
behavioral2/memory/4528-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4372-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/4528-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/files/0x00060000000231f6-13.dat	CryptoLocker_set1
behavioral2/memory/4528-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/memory/4372-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/4528-0-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/files/0x00060000000231f6-13.dat	UPX
behavioral2/memory/4528-17-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/memory/4372-26-0x0000000000500000-0x000000000050F311-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-1-5-21-3054445511-921769590-4013668107-1000\Control Panel\International\Geo\Nation	2024-02-25_b3353d9d2c24bd195f16ff843d3366c1_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4372	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4528-0-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/files/0x00060000000231f6-13.dat	upx
behavioral2/memory/4528-17-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/memory/4372-26-0x0000000000500000-0x000000000050F311-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 4528 wrote to memory of 4372	4528	2024-02-25_b3353d9d2c24bd195f16ff843d3366c1_cryptolocker.exe	87
PID 4528 wrote to memory of 4372	4528	2024-02-25_b3353d9d2c24bd195f16ff843d3366c1_cryptolocker.exe	87
PID 4528 wrote to memory of 4372	4528	2024-02-25_b3353d9d2c24bd195f16ff843d3366c1_cryptolocker.exe	87

C:\Users\Admin\AppData\Local\Temp\2024-02-25_b3353d9d2c24bd195f16ff843d3366c1_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-25_b3353d9d2c24bd195f16ff843d3366c1_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4528
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4372

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
64KB

MD5
f41a3e72d5115f489baa507500ce4b13

SHA1
0e45033aab6b30ad9d228e5dc917aba7e962fd3a

SHA256
d94bfb29deecf7c9ce2ba5724b5d9c8ab3feeabe00e907f0d0ca82c3f1f6284e

SHA512
b5e428d5864a8de7f955a25d27a5e8bfa31ee9468c2ad539c9340802b559813567f6f727bf2699bab7d8690eac3d4b54e0a8a938c07ab2df4af63ba2d7b433da

Download Submit
memory/4372-19-0x0000000002080000-0x0000000002086000-memory.dmp

Filesize
24KB

Download
memory/4372-20-0x0000000001F50000-0x0000000001F56000-memory.dmp

Filesize
24KB

Download
memory/4372-26-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/4528-0-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/4528-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/4528-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/4528-3-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/4528-17-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download