677821271ecac8a5baca61bc9016a046b53e680193131f85e2fa3c820dddba39

Analysis

max time kernel
162s
max time network
172s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
10/04/2024, 23:36

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General

Target

2024-04-10_ad458e32b4fe59afbc8f3ee11db92970_cryptolocker.exe
Size

46KB
MD5

ad458e32b4fe59afbc8f3ee11db92970
SHA1

8424befb627a6802262cb05f803cc356695c82fa
SHA256

677821271ecac8a5baca61bc9016a046b53e680193131f85e2fa3c820dddba39
SHA512

a127c28b414edea723638ddece4b9a66da31369b9ee54c3f5de8e911c5a0f8ef2a0a199cd650531c8021ebe4e74bc767b0203bf5201a1a89cc5510c07b869c21
SSDEEP

768:qmOKYQDf5XdrDmjr5tOOtEvwDpjAajFEitQbDmoSQCVUBJUkQqAHBIG05W2MoLg:qmbhXDmjr5MOtEvwDpj5cDtKkQZQW

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/4332-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0007000000023231-13.dat	CryptoLocker_rule2
behavioral2/memory/3884-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4332-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3884-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 2 IoCs

resource	yara_rule
behavioral2/memory/4332-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3884-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/4332-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x0007000000023231-13.dat	UPX
behavioral2/memory/3884-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4332-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/3884-27-0x0000000000500000-0x0000000000510000-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-1-5-21-609813121-2907144057-1731107329-1000\Control Panel\International\Geo\Nation	2024-04-10_ad458e32b4fe59afbc8f3ee11db92970_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3884	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 4332 wrote to memory of 3884	4332	2024-04-10_ad458e32b4fe59afbc8f3ee11db92970_cryptolocker.exe	83
PID 4332 wrote to memory of 3884	4332	2024-04-10_ad458e32b4fe59afbc8f3ee11db92970_cryptolocker.exe	83
PID 4332 wrote to memory of 3884	4332	2024-04-10_ad458e32b4fe59afbc8f3ee11db92970_cryptolocker.exe	83

C:\Users\Admin\AppData\Local\Temp\2024-04-10_ad458e32b4fe59afbc8f3ee11db92970_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-10_ad458e32b4fe59afbc8f3ee11db92970_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4332
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3884

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
46KB

MD5
8dd8a8b79fd5a90d38449d9f17e1e63c

SHA1
6deabb0e2fbbe8ff42e005f73bddf2b80853a495

SHA256
dc4f2d298078089a02f1e7a6571d2a93b8acd7c45ad973f9e862e4c28a9cfc02

SHA512
e118858196968953a3bae466f15e09a052f7caffe95e953766e9636f4d8734dccec3fa5ad8000df4c53c522300d4d297d857b1dd630c5943fbe9889fdc47db65

Download Submit
memory/3884-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3884-20-0x00000000005D0000-0x00000000005D6000-memory.dmp

Filesize
24KB

Download
memory/3884-23-0x00000000005B0000-0x00000000005B6000-memory.dmp

Filesize
24KB

Download
memory/3884-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

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

Filesize
64KB

Download
memory/4332-1-0x00000000020D0000-0x00000000020D6000-memory.dmp

Filesize
24KB

Download
memory/4332-2-0x00000000020D0000-0x00000000020D6000-memory.dmp

Filesize
24KB

Download
memory/4332-3-0x00000000020F0000-0x00000000020F6000-memory.dmp

Filesize
24KB

Download
memory/4332-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download