f3dafc65473c1a052c3d1bfa93e85c6b3aea6da841e7f823ebac025c977cd5a1

Analysis

max time kernel
149s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20231222-en
resource tags

arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system
submitted
04-02-2024 17:31

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General

Target

2024-02-04_a01bbee96a2eda61ac3b53c26070214a_cryptolocker.exe
Size

68KB
MD5

a01bbee96a2eda61ac3b53c26070214a
SHA1

5b18cc34c36f8c3c699d8d4afc673ab092972ff1
SHA256

f3dafc65473c1a052c3d1bfa93e85c6b3aea6da841e7f823ebac025c977cd5a1
SHA512

bf7374643f5752ceaa513be850cfdac1b815184a8067e6ed2477dd94d2458fbb52b98466e106bf09bb13f482482599c103fd2e9972dd141c4373940da07b2e30
SSDEEP

1536:Dk/xY0sllyGQMOtEvwDpjwycDtKkQZQRKb61vSbgZ3QzNKUK:DW60sllyWOtEvwDpjwF85g

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 3 IoCs

resource	yara_rule
behavioral2/memory/3276-0-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x00070000000231f9-13.dat	CryptoLocker_rule2
behavioral2/memory/3276-17-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 3 IoCs

resource	yara_rule
behavioral2/memory/3276-0-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x00070000000231f9-13.dat	CryptoLocker_set1
behavioral2/memory/3276-17-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_set1

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-1-5-21-3803511929-1339359695-2191195476-1000\Control Panel\International\Geo\Nation	2024-02-04_a01bbee96a2eda61ac3b53c26070214a_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4960	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 3276 wrote to memory of 4960	3276	2024-02-04_a01bbee96a2eda61ac3b53c26070214a_cryptolocker.exe	88
PID 3276 wrote to memory of 4960	3276	2024-02-04_a01bbee96a2eda61ac3b53c26070214a_cryptolocker.exe	88
PID 3276 wrote to memory of 4960	3276	2024-02-04_a01bbee96a2eda61ac3b53c26070214a_cryptolocker.exe	88

C:\Users\Admin\AppData\Local\Temp\2024-02-04_a01bbee96a2eda61ac3b53c26070214a_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-04_a01bbee96a2eda61ac3b53c26070214a_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3276
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4960

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
68KB

MD5
2e5e63fd7e35e5e36756fc687d2157bc

SHA1
67eff094228d612159eb5f1538aff5b362dc05e5

SHA256
7f1777a9bad434f8879360f639030bce757d3ee4168df108942e76c6cb2e3c3b

SHA512
c49c75dc3186fd8adf4fb9a654f4323174f3e6f97aae0cbfbf29947093a60e0939ff0ac5d8c8f3a320cc33e9c8fdf5665d32e7698273efc6a491461f3783d747

Download Submit
memory/3276-0-0x0000000000500000-0x000000000050B000-memory.dmp

Filesize
44KB

Download
memory/3276-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/3276-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/3276-3-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/3276-17-0x0000000000500000-0x000000000050B000-memory.dmp

Filesize
44KB

Download
memory/4960-19-0x00000000005D0000-0x00000000005D6000-memory.dmp

Filesize
24KB

Download
memory/4960-22-0x00000000005B0000-0x00000000005B6000-memory.dmp

Filesize
24KB

Download