81b61fb08d8fa7ef652b93177622166496505cf30d37262251eb17f8f2f8b305

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240412-en
resource tags

arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
submitted
23-04-2024 00:40

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General

Target

2024-04-23_905a6d13111bb00a8a7ce93ee53738f0_cryptolocker.exe
Size

40KB
MD5

905a6d13111bb00a8a7ce93ee53738f0
SHA1

f5c9114625291f444c99cb7932445331c2015bfb
SHA256

81b61fb08d8fa7ef652b93177622166496505cf30d37262251eb17f8f2f8b305
SHA512

db5002e28c551baf7bb6f0efa9b18287f0d8a0af2b3e500a482128562c50fe907fbf282eeb79b41a6b66097949d96e09950d3c05dd1a9e3ac1f8f4df8ca5bd19
SSDEEP

768:X6LsoEEeegiZPvEhHSG+gp/QtOOtEvwDpjBaac4HKcfr1:X6QFElP6n+gJQMOtEvwDpjBsYK6r1

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x000800000001db0e-12.dat	CryptoLocker_rule2

Detection of Cryptolocker Samples 1 IoCs

resource	yara_rule
behavioral2/files/0x000800000001db0e-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-1-5-21-1132431369-515282257-1998160155-1000\Control Panel\International\Geo\Nation	2024-04-23_905a6d13111bb00a8a7ce93ee53738f0_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2420	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 4376 wrote to memory of 2420	4376	2024-04-23_905a6d13111bb00a8a7ce93ee53738f0_cryptolocker.exe	86
PID 4376 wrote to memory of 2420	4376	2024-04-23_905a6d13111bb00a8a7ce93ee53738f0_cryptolocker.exe	86
PID 4376 wrote to memory of 2420	4376	2024-04-23_905a6d13111bb00a8a7ce93ee53738f0_cryptolocker.exe	86

C:\Users\Admin\AppData\Local\Temp\2024-04-23_905a6d13111bb00a8a7ce93ee53738f0_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-23_905a6d13111bb00a8a7ce93ee53738f0_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4376
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2420

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
40KB

MD5
c8f73b99bbca82710a4e31ce5490c693

SHA1
2bf207dd276e078e976f7d14b9d1ea1040021edb

SHA256
700037c89963d05550085de0dbd138e5ead4ba525c9822b4f02d444865bbf8bb

SHA512
ebb318e2ea7406f1eb3041130b107876755e99a2f700b366501e5176c600c2f331f3169ae67371ef8564c1c5648acf78c29105ff6d3fbee3126ff62f9b3e45ea

Download Submit
memory/2420-18-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/2420-17-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/4376-0-0x00000000005E0000-0x00000000005E6000-memory.dmp

Filesize
24KB

Download
memory/4376-1-0x00000000005E0000-0x00000000005E6000-memory.dmp

Filesize
24KB

Download
memory/4376-2-0x0000000000610000-0x0000000000616000-memory.dmp

Filesize
24KB

Download