a78b1d0c98fa2a4b7eb6eb9f4d5cbad57fc88835f011d07207c558340377da8b

Analysis

max time kernel
151s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
15-05-2024 19:25

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General

Target

2024-05-15_6a6a609857e36e5846441635ab0027c9_cryptolocker.exe
Size

44KB
MD5

6a6a609857e36e5846441635ab0027c9
SHA1

f188a74e9c55eeb22e350f8142a12f01ab5f00a2
SHA256

a78b1d0c98fa2a4b7eb6eb9f4d5cbad57fc88835f011d07207c558340377da8b
SHA512

5690f802114d5b447e7cf6f3c2f47959339f8f5ad1e93495763bc9961e4ec133c2432d0ba5bd4e06620884ae6654f159e8d7ab840bb1280230550b59c301e85b
SSDEEP

768:b7o/2n1TCraU6GD1a4X0WcO+wMVm+slAMphqcMy:bc/y2lkF0+Beqc

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x000800000002323a-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	2024-05-15_6a6a609857e36e5846441635ab0027c9_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4288	rewok.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 3968 wrote to memory of 4288	3968	2024-05-15_6a6a609857e36e5846441635ab0027c9_cryptolocker.exe	90
PID 3968 wrote to memory of 4288	3968	2024-05-15_6a6a609857e36e5846441635ab0027c9_cryptolocker.exe	90
PID 3968 wrote to memory of 4288	3968	2024-05-15_6a6a609857e36e5846441635ab0027c9_cryptolocker.exe	90

C:\Users\Admin\AppData\Local\Temp\2024-05-15_6a6a609857e36e5846441635ab0027c9_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-15_6a6a609857e36e5846441635ab0027c9_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3968
- C:\Users\Admin\AppData\Local\Temp\rewok.exe
  "C:\Users\Admin\AppData\Local\Temp\rewok.exe"
  2⤵
  - Executes dropped EXE
  PID:4288

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=1420 --field-trial-handle=1928,i,13242902252791919845,10377620236057253993,262144 --variations-seed-version /prefetch:8
1⤵
PID:4600

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\rewok.exe

Filesize
44KB

MD5
5c4028574b16310bb17bf0d7e44eb6ee

SHA1
eda780fa2012aca403c629e471de954a1ba408e6

SHA256
a65bdd9d0755b06eb235f5aa23402a3821494a2b096ced53f1c6ca3b939e5d98

SHA512
c1026adafaaa1326300bb5bf6d67749a782d86ebeeeff163c8498a8d9e95604152ea6d1a1b767cf9e23e176691bfe31190204f3d985dec41f0dc3bf6d618f11f

Download Submit
memory/3968-0-0x0000000002260000-0x0000000002266000-memory.dmp

Filesize
24KB

Download
memory/3968-1-0x0000000002260000-0x0000000002266000-memory.dmp

Filesize
24KB

Download
memory/3968-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/4288-25-0x0000000002120000-0x0000000002126000-memory.dmp

Filesize
24KB

Download