bc034f81e58399e5b1ce4cef2f8173a0856f3501173b0f8a37306247ce307cdc

Analysis

max time kernel
147s
max time network
169s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
18/02/2024, 16:38

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General

Target

2024-02-18_62f4ba445d56b4d94a0fd50a5fd8fbdb_cryptolocker.exe
Size

84KB
MD5

62f4ba445d56b4d94a0fd50a5fd8fbdb
SHA1

79cced95e7f55eed6113929121ce55bd13924f9c
SHA256

bc034f81e58399e5b1ce4cef2f8173a0856f3501173b0f8a37306247ce307cdc
SHA512

04be1a93eb81363815bfc9c325c544342aa8a9ad10ea708100a601a0d2f3ba57f13c9b85b016669d44f53587505e265a745244f7260c5708f2000b8063a1fa47
SSDEEP

1536:V6QFElP6n+gMQMOtEvwDpjyaLccVNlVSL8t:V6a+pOtEvwDpjvp7

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x000900000002312c-12.dat	CryptoLocker_rule2

Detection of Cryptolocker Samples 1 IoCs

resource	yara_rule
behavioral2/files/0x000900000002312c-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-1-5-21-635608581-3370340891-292606865-1000\Control Panel\International\Geo\Nation	2024-02-18_62f4ba445d56b4d94a0fd50a5fd8fbdb_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4636	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 3512 wrote to memory of 4636	3512	2024-02-18_62f4ba445d56b4d94a0fd50a5fd8fbdb_cryptolocker.exe	86
PID 3512 wrote to memory of 4636	3512	2024-02-18_62f4ba445d56b4d94a0fd50a5fd8fbdb_cryptolocker.exe	86
PID 3512 wrote to memory of 4636	3512	2024-02-18_62f4ba445d56b4d94a0fd50a5fd8fbdb_cryptolocker.exe	86

C:\Users\Admin\AppData\Local\Temp\2024-02-18_62f4ba445d56b4d94a0fd50a5fd8fbdb_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-18_62f4ba445d56b4d94a0fd50a5fd8fbdb_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3512
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4636

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
84KB

MD5
869412aec5fb81eebc1a78f1bd0ce9de

SHA1
c1d40b2e345ae386bb574927e80c861f8f6aa8e1

SHA256
9ad133cb2cf5621fb38082c85436d2a7bd21c0e2f68fc22c1a131d79534ba4c9

SHA512
71c560bc3afd6f8be84a993cfd9b4a3d5c8830b84a97211f842df9c1fbb6b23f00e12cc85096c3b949a2ef4464cd89cd6267ce7bf08406840be31cf53958f7eb

Download Submit
memory/3512-0-0x0000000002050000-0x0000000002056000-memory.dmp

Filesize
24KB

Download
memory/3512-1-0x0000000002050000-0x0000000002056000-memory.dmp

Filesize
24KB

Download
memory/3512-2-0x0000000002080000-0x0000000002086000-memory.dmp

Filesize
24KB

Download
memory/4636-17-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/4636-18-0x00000000020F0000-0x00000000020F6000-memory.dmp

Filesize
24KB

Download