b0f428e57f68d9260c2dd089a912576cd28e4c9415a177b963e6dfd4e8643849

Analysis

max time kernel
150s
max time network
155s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
13-02-2024 14:31

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General

Target

2024-02-13_4dccbc305cbc3abac0fc9dd6c504a0e0_cryptolocker.exe
Size

62KB
MD5

4dccbc305cbc3abac0fc9dd6c504a0e0
SHA1

9a8695e1d231f68110bf6b40570b59feae8afe94
SHA256

b0f428e57f68d9260c2dd089a912576cd28e4c9415a177b963e6dfd4e8643849
SHA512

dd0dee007e1fb5d6b034dd3a84b5a277f88f9eeba3b6e1102a91fb9ea022cb651f5ea1d332a25c1f3f9fca161e70132d7f2ba4348e054512778b593cf508ae90
SSDEEP

1536:qmbhXDmjr5MOtEvwDpj5cDtKkQZQRKb61vSbgts+:BbdDmjr+OtEvwDpjM8m

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/456-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000600000002320f-13.dat	CryptoLocker_rule2
behavioral2/memory/456-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4332-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 2 IoCs

resource	yara_rule
behavioral2/memory/456-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4332-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/456-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000600000002320f-13.dat	UPX
behavioral2/memory/456-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4332-26-0x0000000000500000-0x0000000000510000-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	2024-02-13_4dccbc305cbc3abac0fc9dd6c504a0e0_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4332	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 456 wrote to memory of 4332	456	2024-02-13_4dccbc305cbc3abac0fc9dd6c504a0e0_cryptolocker.exe	83
PID 456 wrote to memory of 4332	456	2024-02-13_4dccbc305cbc3abac0fc9dd6c504a0e0_cryptolocker.exe	83
PID 456 wrote to memory of 4332	456	2024-02-13_4dccbc305cbc3abac0fc9dd6c504a0e0_cryptolocker.exe	83

C:\Users\Admin\AppData\Local\Temp\2024-02-13_4dccbc305cbc3abac0fc9dd6c504a0e0_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-13_4dccbc305cbc3abac0fc9dd6c504a0e0_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:456
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4332

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
62KB

MD5
ffac51347a2c75bf8ccf322f19675563

SHA1
385f15e352f46092866b4d7225ad7a2d030e7df2

SHA256
d588b296bd2156e8ea4c0031097a7c59519783febfc7ac167fac83cde86d2cf6

SHA512
c42ff2239af727691be8007a22ab15b63f7eb50ed88fd1414f00b7747cc7f0ffedaa4f711e7b44eef9d10a522f97b3eefac01d6af7e4529cf6e9021d2bdc7b70

Download Submit
memory/456-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/456-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/456-3-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/456-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/456-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4332-20-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/4332-19-0x00000000007D0000-0x00000000007D6000-memory.dmp

Filesize
24KB

Download
memory/4332-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download