2e10c8f89f200636c855f5d15ca24f5de5e6d8201ab55f7d55c2880de5005296

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
28/03/2024, 23:38

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General

Target

2024-03-28_d212fd5211f2d747ab809697f9903ebf_cryptolocker.exe
Size

66KB
MD5

d212fd5211f2d747ab809697f9903ebf
SHA1

fe003c722482cda3641dec66e21f075e3af514de
SHA256

2e10c8f89f200636c855f5d15ca24f5de5e6d8201ab55f7d55c2880de5005296
SHA512

c202cf29802ac3e629054a9a68863e8c1bb6d6930c802138d6454a9bc486a3834de834335fdc7ae5a41c2fa10fe84e2809fd02a07ec6b19b284cd28146cb1482
SSDEEP

1536:P8mnK6QFElP6n+gymddpMOtEvwDpjY6UnUSg:1nK6a+qdOOtEvwDpjr

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/1200-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000800000002320c-13.dat	CryptoLocker_rule2
behavioral2/memory/1200-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1932-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/1200-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000800000002320c-13.dat	CryptoLocker_set1
behavioral2/memory/1200-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/memory/1932-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/1200-0-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/files/0x000800000002320c-13.dat	UPX
behavioral2/memory/1200-17-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/memory/1932-26-0x0000000000500000-0x000000000050F311-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-1-5-21-399997616-3400990511-967324271-1000\Control Panel\International\Geo\Nation	2024-03-28_d212fd5211f2d747ab809697f9903ebf_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1932	asih.exe

UPX packed file 4 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral2/memory/1200-0-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/files/0x000800000002320c-13.dat	upx
behavioral2/memory/1200-17-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/memory/1932-26-0x0000000000500000-0x000000000050F311-memory.dmp	upx

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 1200 wrote to memory of 1932	1200	2024-03-28_d212fd5211f2d747ab809697f9903ebf_cryptolocker.exe	87
PID 1200 wrote to memory of 1932	1200	2024-03-28_d212fd5211f2d747ab809697f9903ebf_cryptolocker.exe	87
PID 1200 wrote to memory of 1932	1200	2024-03-28_d212fd5211f2d747ab809697f9903ebf_cryptolocker.exe	87

C:\Users\Admin\AppData\Local\Temp\2024-03-28_d212fd5211f2d747ab809697f9903ebf_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-28_d212fd5211f2d747ab809697f9903ebf_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1200
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1932

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
66KB

MD5
07b34cc8970c6b2962e06acd96d54956

SHA1
1c9009f689ec52b2ff2c489f00e45fc2a162b93b

SHA256
4c65bccf5302223248d55ba592eaf191d54dd9f99e25f8b3dac7dd8f0a85494a

SHA512
5ab7d2538062e1a82c98f57c1f2b80c9d6e72c3cde5814b56d820bbd9b517f0ad31bdaddbb4e4b47215ab22fb7aa42cd1eb9634139da6a0f9889685b8ee03942

Download Submit
memory/1200-0-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/1200-1-0x00000000006B0000-0x00000000006B6000-memory.dmp

Filesize
24KB

Download
memory/1200-2-0x00000000006B0000-0x00000000006B6000-memory.dmp

Filesize
24KB

Download
memory/1200-3-0x00000000006D0000-0x00000000006D6000-memory.dmp

Filesize
24KB

Download
memory/1200-17-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/1932-19-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/1932-21-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/1932-26-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download