f484d61ade65428083d57e630dfd09b3f6c5086cbca63bcfff601eca25fab2cd

Analysis

max time kernel
148s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
14/05/2024, 10:38

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General

Target

2024-05-14_931caf575bc3a80249f338e3d9816da8_cryptolocker.exe
Size

48KB
MD5

931caf575bc3a80249f338e3d9816da8
SHA1

765e50482aa3ba5eba8d4a7d22ec4eaf098a54a0
SHA256

f484d61ade65428083d57e630dfd09b3f6c5086cbca63bcfff601eca25fab2cd
SHA512

6bafd50dd304fbfed5cc713a90e1796e77b7ab7755890de4f59fc1d42dd95101dace7a7b69d2b744fa1860d3860df753a6f65d7aa32ff16e5c24195151648de5
SSDEEP

768:P6LsoVEeegiZPvEhHSP+gp/QtOOtEvwDpjBBMLZdzuqpXsiE8Wq/Dpkc8:P6Q0ElP6G+gJQMOtEvwDpjB8WMlf8

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/3964-0-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0007000000023305-13.dat	CryptoLocker_rule2
behavioral2/memory/3964-17-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3464-26-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/3964-0-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0007000000023305-13.dat	CryptoLocker_set1
behavioral2/memory/3964-17-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3464-26-0x0000000000500000-0x000000000050B000-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-1-5-21-3571316656-3665257725-2415531812-1000\Control Panel\International\Geo\Nation	2024-05-14_931caf575bc3a80249f338e3d9816da8_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3464	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 3964 wrote to memory of 3464	3964	2024-05-14_931caf575bc3a80249f338e3d9816da8_cryptolocker.exe	85
PID 3964 wrote to memory of 3464	3964	2024-05-14_931caf575bc3a80249f338e3d9816da8_cryptolocker.exe	85
PID 3964 wrote to memory of 3464	3964	2024-05-14_931caf575bc3a80249f338e3d9816da8_cryptolocker.exe	85

C:\Users\Admin\AppData\Local\Temp\2024-05-14_931caf575bc3a80249f338e3d9816da8_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-14_931caf575bc3a80249f338e3d9816da8_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3964
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3464

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
48KB

MD5
842beaf99d4c93b8f486866c09d2c5fd

SHA1
5073d2509f733253478b3b62f02e8cc2c4cbdcae

SHA256
d9beee3fce36c4e0bcf5bafc452f8a4e0e023ffe05d4791522f77ca963c772ef

SHA512
a04ba164cba49abe6eea99071fa25d29e9966ffc29343f77db3b94aa04b1906c25d39647c5f96de1983b4c5889ca0d4f68c7e6e5f38c1944a267501e69fa8888

Download Submit
memory/3464-19-0x0000000000750000-0x0000000000756000-memory.dmp

Filesize
24KB

Download
memory/3464-25-0x0000000000730000-0x0000000000736000-memory.dmp

Filesize
24KB

Download
memory/3464-26-0x0000000000500000-0x000000000050B000-memory.dmp

Filesize
44KB

Download
memory/3964-0-0x0000000000500000-0x000000000050B000-memory.dmp

Filesize
44KB

Download
memory/3964-1-0x00000000005B0000-0x00000000005B6000-memory.dmp

Filesize
24KB

Download
memory/3964-2-0x00000000005D0000-0x00000000005D6000-memory.dmp

Filesize
24KB

Download
memory/3964-9-0x00000000005B0000-0x00000000005B6000-memory.dmp

Filesize
24KB

Download
memory/3964-17-0x0000000000500000-0x000000000050B000-memory.dmp

Filesize
44KB

Download