26b765ec77613dd198b854e6e4578d264ccf6b8af8f8a8eb32e6c97f9e6f4bc2

Analysis

max time kernel
154s
max time network
167s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
18/01/2024, 23:03

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General

Target

2024-01-18_8cf547c807ade177842b5bdb8b6d581b_cryptolocker.exe
Size

58KB
MD5

8cf547c807ade177842b5bdb8b6d581b
SHA1

a0106d7f6343c594948e73a3d52f872f8285e9a0
SHA256

26b765ec77613dd198b854e6e4578d264ccf6b8af8f8a8eb32e6c97f9e6f4bc2
SHA512

d74b603f77c48660460ec85ba623648a38613149044e85084b37db81de0286b1dc726d02401d63c42585517288b9677a8e0caf7a58a32e1e7148cd031f15bd78
SSDEEP

1536:qmbhXDmjr5MOtEvwDpj5cDtKkQZQRKb614f:BbdDmjr+OtEvwDpjMU

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/5016-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0006000000023233-13.dat	CryptoLocker_rule2
behavioral2/memory/5016-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4760-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 2 IoCs

resource	yara_rule
behavioral2/memory/5016-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4760-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/5016-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x0006000000023233-13.dat	UPX
behavioral2/memory/5016-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4760-26-0x0000000000500000-0x0000000000510000-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-1-5-21-983843758-932321429-1636175382-1000\Control Panel\International\Geo\Nation	2024-01-18_8cf547c807ade177842b5bdb8b6d581b_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4760	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 5016 wrote to memory of 4760	5016	2024-01-18_8cf547c807ade177842b5bdb8b6d581b_cryptolocker.exe	86
PID 5016 wrote to memory of 4760	5016	2024-01-18_8cf547c807ade177842b5bdb8b6d581b_cryptolocker.exe	86
PID 5016 wrote to memory of 4760	5016	2024-01-18_8cf547c807ade177842b5bdb8b6d581b_cryptolocker.exe	86

C:\Users\Admin\AppData\Local\Temp\2024-01-18_8cf547c807ade177842b5bdb8b6d581b_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-01-18_8cf547c807ade177842b5bdb8b6d581b_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:5016
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4760

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
58KB

MD5
9f51e8a4b5b233f7e08f66bbdf1ded3a

SHA1
685ed24e60918f88c5686c469f6c954e786e5273

SHA256
fdffabaecaecb0bb8721ed606f5e078a15f77925e8b20ca8ce8ed022ea3cd19f

SHA512
c2828e7cd15dda5e1870a890d9a7d5d8471d031dc455298b90c932dd0bf6a47cd52a32b2e6eb4b6b19d189d3713bfa9129d59bf99a130cbe4518e54400f25c72

Download Submit
memory/4760-19-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/4760-22-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/4760-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/5016-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/5016-1-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/5016-2-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/5016-3-0x0000000002080000-0x0000000002086000-memory.dmp

Filesize
24KB

Download
memory/5016-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download