5dfb93ee9d4546802b7453a31f90d0df21e003ff062e034925fbdbb719375c07

Analysis

max time kernel
149s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
27/05/2024, 04:44

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General

Target

2024-05-27_a4acb9384407727c92bcbf47a4f3889e_cryptolocker.exe
Size

90KB
MD5

a4acb9384407727c92bcbf47a4f3889e
SHA1

27bfef49e5ddc3303a8492882cab8d68316eaf65
SHA256

5dfb93ee9d4546802b7453a31f90d0df21e003ff062e034925fbdbb719375c07
SHA512

90df247a569952d51958f66eb24a3e41f4af6414452fa3d6290af7732e33f5a6ff92e0ae7f96ca70427b32d3198dd9cfebb8f58f7bef0b04c2c28927927e7a96
SSDEEP

1536:n6QFElP6n+g9u9cvMOtEvwDpjYYTjipvF2bx1PQAyr:n6a+1SEOtEvwDpjYYvQd2Pe

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/4684-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0008000000022f51-13.dat	CryptoLocker_rule2
behavioral2/memory/4684-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3520-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/4684-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0008000000022f51-13.dat	CryptoLocker_set1
behavioral2/memory/4684-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3520-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/4684-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x0008000000022f51-13.dat	UPX
behavioral2/memory/4684-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/3520-26-0x0000000000500000-0x0000000000510000-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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation	2024-05-27_a4acb9384407727c92bcbf47a4f3889e_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3520	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4684-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x0008000000022f51-13.dat	upx
behavioral2/memory/4684-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/3520-26-0x0000000000500000-0x0000000000510000-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 4684 wrote to memory of 3520	4684	2024-05-27_a4acb9384407727c92bcbf47a4f3889e_cryptolocker.exe	83
PID 4684 wrote to memory of 3520	4684	2024-05-27_a4acb9384407727c92bcbf47a4f3889e_cryptolocker.exe	83
PID 4684 wrote to memory of 3520	4684	2024-05-27_a4acb9384407727c92bcbf47a4f3889e_cryptolocker.exe	83

C:\Users\Admin\AppData\Local\Temp\2024-05-27_a4acb9384407727c92bcbf47a4f3889e_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-27_a4acb9384407727c92bcbf47a4f3889e_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4684
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3520

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
90KB

MD5
ff89b7e492f506cb09ebc1480d95095a

SHA1
e430964fc28d8d9037dbb2c0f493bcec55e9a55d

SHA256
1467a62fdb8c77104fcab54893702a49787cc653a7b5048326c34ae54ff39024

SHA512
b87d8b0e5e5abf73d0304ef160c44a76709caf0eae6e19d9184341f7aa01389b202fbbdc798f290a5d2db7943a593e3220090cb464b6752de47f04f9a2b22b0e

Download Submit
memory/3520-19-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/3520-25-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/3520-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4684-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4684-1-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/4684-2-0x00000000005D0000-0x00000000005D6000-memory.dmp

Filesize
24KB

Download
memory/4684-9-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/4684-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download