89e65478fe5265261994bb87be69dd5053d8b9797b29d4b19f1456adf821b28a

Analysis

max time kernel
150s
max time network
155s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
13/03/2024, 05:27

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General

Target

2024-03-13_0e1c7cfbab8af889bfb5d4e76fd6d47f_cryptolocker.exe
Size

47KB
MD5

0e1c7cfbab8af889bfb5d4e76fd6d47f
SHA1

3a6097fd4cc4dca42896a729296967c300bc2d4f
SHA256

89e65478fe5265261994bb87be69dd5053d8b9797b29d4b19f1456adf821b28a
SHA512

c17845b2ae719707d7e58527e5d915ca97099093b37a94edacc0a5a832c71ddfd91374a7cbe2544c833b52c318e51e0feaecaa97d30cd8d17db5b22999f30cc5
SSDEEP

768:qmOKYQDf5XdrDmjr5tOOtEvwDpjAajFEitQbDmoSQCVUBJUkQqAHBIG05W2Mo2pa:qmbhXDmjr5MOtEvwDpj5cDtKkQZQj/

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/4564-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0008000000022745-13.dat	CryptoLocker_rule2
behavioral2/memory/4564-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1612-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1612-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 3 IoCs

resource	yara_rule
behavioral2/memory/4564-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1612-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1612-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/4564-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x0008000000022745-13.dat	UPX
behavioral2/memory/4564-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/1612-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/1612-27-0x0000000000500000-0x0000000000510000-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-1-5-21-3045580317-3728985860-206385570-1000\Control Panel\International\Geo\Nation	2024-03-13_0e1c7cfbab8af889bfb5d4e76fd6d47f_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1612	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 4564 wrote to memory of 1612	4564	2024-03-13_0e1c7cfbab8af889bfb5d4e76fd6d47f_cryptolocker.exe	90
PID 4564 wrote to memory of 1612	4564	2024-03-13_0e1c7cfbab8af889bfb5d4e76fd6d47f_cryptolocker.exe	90
PID 4564 wrote to memory of 1612	4564	2024-03-13_0e1c7cfbab8af889bfb5d4e76fd6d47f_cryptolocker.exe	90

C:\Users\Admin\AppData\Local\Temp\2024-03-13_0e1c7cfbab8af889bfb5d4e76fd6d47f_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-13_0e1c7cfbab8af889bfb5d4e76fd6d47f_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4564
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1612

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
47KB

MD5
66ec0566aff7e07e123651f526c2dbdb

SHA1
694d47ccd97caa75fe7450668dbf6d10809f26e6

SHA256
0beda79fce20d6cba4fada7e7ed681d5e6f203b4aa27cb36494e47fc31001438

SHA512
89ad02a087fa0dd09e1ad47dbec7e9b27d8ef4c45c6cd803560f718d602a67f6c3bf44431b2f19917f98dec8301a47ecd684d738ae95104e6c662ff68cf8850c

Download Submit
memory/1612-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1612-20-0x00000000004B0000-0x00000000004B6000-memory.dmp

Filesize
24KB

Download
memory/1612-26-0x0000000000490000-0x0000000000496000-memory.dmp

Filesize
24KB

Download
memory/1612-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4564-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4564-1-0x0000000000560000-0x0000000000566000-memory.dmp

Filesize
24KB

Download
memory/4564-2-0x0000000000560000-0x0000000000566000-memory.dmp

Filesize
24KB

Download
memory/4564-3-0x00000000020F0000-0x00000000020F6000-memory.dmp

Filesize
24KB

Download
memory/4564-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download