a9004c089dcc994e3e61cc96cb0ea7f0e24c515187114447994b3e33d24ee96a

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
09/06/2024, 04:03

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General

Target

2024-06-09_ee8c65a30b97d1ebccc690ad699a1e96_cryptolocker.exe
Size

40KB
MD5

ee8c65a30b97d1ebccc690ad699a1e96
SHA1

b1bfa70ffd30b94dc33e91269892cce3562db139
SHA256

a9004c089dcc994e3e61cc96cb0ea7f0e24c515187114447994b3e33d24ee96a
SHA512

d6faa50bf1a8d92e7a1257231923d6fc127434107ea1afe681e47d9e35d1d6bfcf30ce3682c44f64e35a6630b4a92ecb15e430f641ed58d1b34cd2e8eee69c1e
SSDEEP

768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITY/99s:qDdFJy3QMOtEvwDpjjWMl7T+s

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/4856-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000900000002328e-13.dat	CryptoLocker_rule2
behavioral2/memory/4856-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1588-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/4856-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000900000002328e-13.dat	CryptoLocker_set1
behavioral2/memory/4856-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1588-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/4856-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000900000002328e-13.dat	UPX
behavioral2/memory/4856-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/1588-27-0x0000000000500000-0x0000000000510000-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-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation	2024-06-09_ee8c65a30b97d1ebccc690ad699a1e96_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1588	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4856-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x000900000002328e-13.dat	upx
behavioral2/memory/4856-18-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/1588-27-0x0000000000500000-0x0000000000510000-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 4856 wrote to memory of 1588	4856	2024-06-09_ee8c65a30b97d1ebccc690ad699a1e96_cryptolocker.exe	82
PID 4856 wrote to memory of 1588	4856	2024-06-09_ee8c65a30b97d1ebccc690ad699a1e96_cryptolocker.exe	82
PID 4856 wrote to memory of 1588	4856	2024-06-09_ee8c65a30b97d1ebccc690ad699a1e96_cryptolocker.exe	82

C:\Users\Admin\AppData\Local\Temp\2024-06-09_ee8c65a30b97d1ebccc690ad699a1e96_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-09_ee8c65a30b97d1ebccc690ad699a1e96_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4856
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1588

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
40KB

MD5
d27809f8057dee1fdc4c463d5a051aa7

SHA1
765eadb66c7d5133dfc34c4e3ead4aea32a389c9

SHA256
0eedf20e2d204ab3c3b59a7b1f0d1294eb5a73813e0d5f64fc28780abc44d276

SHA512
5cdb2a91cf9316ef5a267a6ba0910a79601d7b8e75957f1e65cc88ac4052a29d2a74baf69f31cb25c54881e3217f243eb2473548a440cb6ce844cdf6535f772f

Download Submit
memory/1588-20-0x0000000002100000-0x0000000002106000-memory.dmp

Filesize
24KB

Download
memory/1588-26-0x0000000000730000-0x0000000000736000-memory.dmp

Filesize
24KB

Download
memory/1588-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4856-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4856-1-0x00000000007B0000-0x00000000007B6000-memory.dmp

Filesize
24KB

Download
memory/4856-2-0x00000000007D0000-0x00000000007D6000-memory.dmp

Filesize
24KB

Download
memory/4856-9-0x00000000007B0000-0x00000000007B6000-memory.dmp

Filesize
24KB

Download
memory/4856-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download