a4cae0f1fe5c2c002f3744750f044209b0d349ac51f6d9e8a09f283d24288d7c

Analysis

max time kernel
148s
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, 03:26

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General

Target

2024-02-04_15b11993eb9db293b53ab3674916fdb7_cryptolocker.exe
Size

84KB
MD5

15b11993eb9db293b53ab3674916fdb7
SHA1

5da5356d68a063c6873cbfb55f1e70550bec3192
SHA256

a4cae0f1fe5c2c002f3744750f044209b0d349ac51f6d9e8a09f283d24288d7c
SHA512

c1bd78124dd23d5a7ea3d22ba50cc1f51527b1e4f087ead065f1c3d6801a1f04322e672f4b5b9b77b088868aa38a36e7e91db23d3a82801a2666bdab70ff033d
SSDEEP

1536:V6QFElP6n+gMQMOtEvwDpjyaLccVNlVSL8f:V6a+pOtEvwDpjvpJ

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x00070000000231f9-12.dat	CryptoLocker_rule2

Detection of Cryptolocker Samples 1 IoCs

resource	yara_rule
behavioral2/files/0x00070000000231f9-12.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-1-5-21-3803511929-1339359695-2191195476-1000\Control Panel\International\Geo\Nation	2024-02-04_15b11993eb9db293b53ab3674916fdb7_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4272	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 2384 wrote to memory of 4272	2384	2024-02-04_15b11993eb9db293b53ab3674916fdb7_cryptolocker.exe	86
PID 2384 wrote to memory of 4272	2384	2024-02-04_15b11993eb9db293b53ab3674916fdb7_cryptolocker.exe	86
PID 2384 wrote to memory of 4272	2384	2024-02-04_15b11993eb9db293b53ab3674916fdb7_cryptolocker.exe	86

C:\Users\Admin\AppData\Local\Temp\2024-02-04_15b11993eb9db293b53ab3674916fdb7_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-04_15b11993eb9db293b53ab3674916fdb7_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2384
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4272

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
049542164d2f89c6804e212d3c4e45de

SHA1
224b3e38665d84feffaef6f17b26d7553d8df8ad

SHA256
58e8d0cfe07fe30f06de90266dc9aa34b27edac75ff06d5c984e6389cb9c7547

SHA512
b538f9e6ccbbdb180af77ccff78dd2b46c75ab7c9887892d6bc3ff032f6e8ef35e6f9545fdd078e97d9e298103ac2a8d584436f7fa97d6b768965d9b9ef6c011

Download Submit
memory/2384-0-0x0000000000530000-0x0000000000536000-memory.dmp

Filesize
24KB

Download
memory/2384-1-0x0000000000530000-0x0000000000536000-memory.dmp

Filesize
24KB

Download
memory/2384-2-0x0000000000550000-0x0000000000556000-memory.dmp

Filesize
24KB

Download
memory/4272-17-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/4272-23-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download