07fa684ed0aa1894033b46c251b6adeedcd2b1fef033dd30ee89a132801394cc

Analysis

max time kernel
152s
max time network
155s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
28-03-2024 02:53

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General

Target

2024-03-28_c5bec8b4337f2592cdae3d0068474239_cryptolocker.exe
Size

36KB
MD5

c5bec8b4337f2592cdae3d0068474239
SHA1

a5e16873b06c78e1ed35e378143147dadcd0aff8
SHA256

07fa684ed0aa1894033b46c251b6adeedcd2b1fef033dd30ee89a132801394cc
SHA512

c488a4c19f378660677c240249dd4a8082ee730a22be3cb2a04980aca49f5f6cca368d80919374e0b298cb0b0c5a11177804ce5fec82903f223642e72bf2908b
SSDEEP

384:bM7Q0pjC4GybxMv01d3AcASBQMf6i/zzzcYgUPSzn1KkZCb9q8IuxNXTY:b/yC4GyNM01GuQMNXw2PSj1Pqq8tjY

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x000900000002325f-12.dat	CryptoLocker_rule2

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	2024-03-28_c5bec8b4337f2592cdae3d0068474239_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3724	retln.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 1996 wrote to memory of 3724	1996	2024-03-28_c5bec8b4337f2592cdae3d0068474239_cryptolocker.exe	94
PID 1996 wrote to memory of 3724	1996	2024-03-28_c5bec8b4337f2592cdae3d0068474239_cryptolocker.exe	94
PID 1996 wrote to memory of 3724	1996	2024-03-28_c5bec8b4337f2592cdae3d0068474239_cryptolocker.exe	94

C:\Users\Admin\AppData\Local\Temp\2024-03-28_c5bec8b4337f2592cdae3d0068474239_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-28_c5bec8b4337f2592cdae3d0068474239_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1996
- C:\Users\Admin\AppData\Local\Temp\retln.exe
  "C:\Users\Admin\AppData\Local\Temp\retln.exe"
  2⤵
  - Executes dropped EXE
  PID:3724

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=4160 --field-trial-handle=3084,i,4016110471176367543,14287608422419064331,262144 --variations-seed-version /prefetch:8
1⤵
PID:4480

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

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Downloads

C:\Users\Admin\AppData\Local\Temp\retln.exe

Filesize
37KB

MD5
a432b9c82773032d72ff1432178e7f3a

SHA1
8565c85eb55aed758c8b8766cbfba879600dc19c

SHA256
99b1f8c3621855a14ef8ef7f8fafc2e7751d15b8c83648903f32b2e298998858

SHA512
39fee946a720c429e4efe0820e0757b939ffde113dbb42da86bf5bfd1e07a8a6128824c277323f3d5e0d1671a82801861f5a16c25a509c707fa9868e2c0a2643

Download Submit
memory/1996-0-0x0000000002250000-0x0000000002256000-memory.dmp

Filesize
24KB

Download
memory/1996-1-0x0000000002250000-0x0000000002256000-memory.dmp

Filesize
24KB

Download
memory/1996-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/3724-20-0x0000000002190000-0x0000000002196000-memory.dmp

Filesize
24KB

Download