8b87aa62eaa845159e6d242ba142f477995475d863797221a2dde596197c4f67

Analysis

max time kernel
151s
max time network
158s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
20-04-2024 15:39

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General

Target

2024-04-20_a66b3a07be76a80d4cfe5064cc4a014d_cryptolocker.exe
Size

35KB
MD5

a66b3a07be76a80d4cfe5064cc4a014d
SHA1

812991cc366df95def3063c709ed611fce2faa92
SHA256

8b87aa62eaa845159e6d242ba142f477995475d863797221a2dde596197c4f67
SHA512

f57828bfd42b92c528597a2092818fee024e42cd409e57540b10139f5eff6b9bf5fcb32420eb4ec5f66418b2f704c8d0ccfa6297eb2d985b5cb963508cf5de9b
SSDEEP

768:wHGGaSawqnwjRQ6ESlmFOsPoOdQtOOtEvwDpjm6WaJIOc+UPPEkD:YGzl5wjRQBBOsP1QMOtEvwDpjgarrkD

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/4768-0-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000900000002324b-13.dat	CryptoLocker_rule2
behavioral2/memory/3484-17-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4768-26-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/4768-0-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000900000002324b-13.dat	CryptoLocker_set1
behavioral2/memory/3484-17-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4768-26-0x0000000000500000-0x000000000050B000-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-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	2024-04-20_a66b3a07be76a80d4cfe5064cc4a014d_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3484	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 4768 wrote to memory of 3484	4768	2024-04-20_a66b3a07be76a80d4cfe5064cc4a014d_cryptolocker.exe	92
PID 4768 wrote to memory of 3484	4768	2024-04-20_a66b3a07be76a80d4cfe5064cc4a014d_cryptolocker.exe	92
PID 4768 wrote to memory of 3484	4768	2024-04-20_a66b3a07be76a80d4cfe5064cc4a014d_cryptolocker.exe	92

C:\Users\Admin\AppData\Local\Temp\2024-04-20_a66b3a07be76a80d4cfe5064cc4a014d_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-20_a66b3a07be76a80d4cfe5064cc4a014d_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4768
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3484

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=1340 --field-trial-handle=2276,i,11674642242468042059,14711253743544118298,262144 --variations-seed-version /prefetch:8
1⤵
PID:1208

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
36KB

MD5
b8730cb7ed0bd9504ba623e4f034661d

SHA1
ffee1bb85fce3108b4635fe5c5a8252dc99817c1

SHA256
65f598b02d32bebca7607f9ccbec0e8f083a7a09d5f44462a4966fcfd94f31e7

SHA512
69de2a0d29caad84302cb25a04b2670f6fae30984e0a99c9303a1db26c0fd0094384f88f60d4cbb0f2009a164323ca748493310c4b559fc4f4a9c5f0f0344ece

Download Submit
memory/3484-17-0x0000000000500000-0x000000000050B000-memory.dmp

Filesize
44KB

Download
memory/3484-19-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/3484-25-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/4768-0-0x0000000000500000-0x000000000050B000-memory.dmp

Filesize
44KB

Download
memory/4768-1-0x0000000002190000-0x0000000002196000-memory.dmp

Filesize
24KB

Download
memory/4768-2-0x0000000002190000-0x0000000002196000-memory.dmp

Filesize
24KB

Download
memory/4768-3-0x00000000021B0000-0x00000000021B6000-memory.dmp

Filesize
24KB

Download
memory/4768-26-0x0000000000500000-0x000000000050B000-memory.dmp

Filesize
44KB

Download