857704ee79996622592e6438be3e147e3a8a44ad32d595042a62b740e9301cb1

Analysis

max time kernel
150s
max time network
155s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
19-02-2024 00:29

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General

Target

2024-02-19_46c8ebf74b7e0e5d5df991d56f7a99fd_cryptolocker.exe
Size

91KB
MD5

46c8ebf74b7e0e5d5df991d56f7a99fd
SHA1

9dd258b6c8d9c9dfdf0b084a38f1ecefbb3bee1d
SHA256

857704ee79996622592e6438be3e147e3a8a44ad32d595042a62b740e9301cb1
SHA512

10c38a5244b5c1c6751691d7df16296513e8a3f248d872c6f9f0cc16b01b16c6e77938443ea62ae49a6265d876f5e8e4c3ad74edf48f09fee6757556cfb5f570
SSDEEP

1536:V6QFElP6n+gMQMOtEvwDpjQGYQbN/PKwMgvb:V6a+pOtEvwDpjtzf

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x000600000002323d-12.dat	CryptoLocker_rule2

Detection of Cryptolocker Samples 1 IoCs

resource	yara_rule
behavioral2/files/0x000600000002323d-12.dat	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-1-5-21-1815711207-1844170477-3539718864-1000\Control Panel\International\Geo\Nation	2024-02-19_46c8ebf74b7e0e5d5df991d56f7a99fd_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
900	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 4956 wrote to memory of 900	4956	2024-02-19_46c8ebf74b7e0e5d5df991d56f7a99fd_cryptolocker.exe	84
PID 4956 wrote to memory of 900	4956	2024-02-19_46c8ebf74b7e0e5d5df991d56f7a99fd_cryptolocker.exe	84
PID 4956 wrote to memory of 900	4956	2024-02-19_46c8ebf74b7e0e5d5df991d56f7a99fd_cryptolocker.exe	84

C:\Users\Admin\AppData\Local\Temp\2024-02-19_46c8ebf74b7e0e5d5df991d56f7a99fd_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-19_46c8ebf74b7e0e5d5df991d56f7a99fd_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4956
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:900

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
91KB

MD5
410f059d70eddc1406e6664ef0b759e1

SHA1
9673dbfc24e0b7dae818290ea34cdf4f9c34a18d

SHA256
a7cbe01522d4965ea1761b9875292aa7f82f380179c0ef0d62a2e2936041e1da

SHA512
eafb50129be3f2555e45c7763b05eea6c84572583a3c549e91459ec28980ffd8f18882289ba71548a6308e83bc0b14d4d8907131e66a0c4492c7b934dfe8b83a

Download Submit
memory/900-17-0x0000000002070000-0x0000000002076000-memory.dmp

Filesize
24KB

Download
memory/900-20-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/4956-0-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/4956-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/4956-2-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download