a19d452b9b22fd588b1743385d951b0df481d34a6e6f0e3e7132bdf48c62d966

Analysis

max time kernel
152s
max time network
158s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
04/02/2024, 04:01

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General

Target

2024-02-04_e9d6e37a4ac45ad3594e055b4b967d47_cryptolocker.exe
Size

60KB
MD5

e9d6e37a4ac45ad3594e055b4b967d47
SHA1

b743358885159918750247037adda71b0b9e169e
SHA256

a19d452b9b22fd588b1743385d951b0df481d34a6e6f0e3e7132bdf48c62d966
SHA512

3d12af583daed84892a977bd2cfe60df06f4acdb133cfc65d349d0ee887b0cc256de2d1a2c79e703528ffd80b365053b466377dd4559e092b9bee2ed808619c2
SSDEEP

1536:qmbhXDmjr5MOtEvwDpj5cDtKkQZQRKb61vSbgtstC:BbdDmjr+OtEvwDpjM80

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/1976-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0007000000023109-13.dat	CryptoLocker_rule2
behavioral2/memory/1976-25-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3436-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 2 IoCs

resource	yara_rule
behavioral2/memory/1976-25-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3436-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/1976-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x0007000000023109-13.dat	UPX
behavioral2/memory/1976-25-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/3436-26-0x0000000000500000-0x0000000000510000-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-1-5-21-3073191680-435865314-2862784915-1000\Control Panel\International\Geo\Nation	2024-02-04_e9d6e37a4ac45ad3594e055b4b967d47_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3436	asih.exe

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 1976 wrote to memory of 3436	1976	2024-02-04_e9d6e37a4ac45ad3594e055b4b967d47_cryptolocker.exe	83
PID 1976 wrote to memory of 3436	1976	2024-02-04_e9d6e37a4ac45ad3594e055b4b967d47_cryptolocker.exe	83
PID 1976 wrote to memory of 3436	1976	2024-02-04_e9d6e37a4ac45ad3594e055b4b967d47_cryptolocker.exe	83

C:\Users\Admin\AppData\Local\Temp\2024-02-04_e9d6e37a4ac45ad3594e055b4b967d47_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-04_e9d6e37a4ac45ad3594e055b4b967d47_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1976
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3436

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
61KB

MD5
bde00ff77757612e16864d7893f5086d

SHA1
090ed5eca1323d1bb30210c6294ab94348936cc2

SHA256
11101ce18229cfa0985f37efffe4c1355f22eef3a5d7b2a9a0b6bb98f26f454f

SHA512
998a30da9efac0a85ad8db8842b471e80810f9dd11eab3c4ea7904db94524c7e45628444c0b2fdc3221f62a62290baa283c1b4ad42cdc4b1eb71812edc717b08

Download Submit
memory/1976-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1976-1-0x0000000002050000-0x0000000002056000-memory.dmp

Filesize
24KB

Download
memory/1976-2-0x0000000002050000-0x0000000002056000-memory.dmp

Filesize
24KB

Download
memory/1976-3-0x0000000002070000-0x0000000002076000-memory.dmp

Filesize
24KB

Download
memory/1976-25-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3436-18-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/3436-23-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/3436-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download