ac15805690f9e3837dca1339fafc23195792b64402f4896284bd5e109920728f

Analysis

max time kernel
151s
max time network
156s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
28/05/2024, 15:26

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General

Target

2024-05-28_44380f7eeaa8c1cc6c6e42ba964922ee_cryptolocker.exe
Size

34KB
MD5

44380f7eeaa8c1cc6c6e42ba964922ee
SHA1

4a49727c7056961d384949ff55359b882927a25f
SHA256

ac15805690f9e3837dca1339fafc23195792b64402f4896284bd5e109920728f
SHA512

39139298abe1a0cad5d7c766f8105cb71b68b79b8d779cfdcfba9af1a3537939e9a0f3d63877b531aa6b03e9aef645aec1bacdb1d4ea379e7f42f6b9d3f69cd1
SSDEEP

768:bFPm5zusFUB2preAr+Ofjg0S16avdrQFiLjJvtXI:bFPmpiif/oc+vXI

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/824-0-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x001100000002324d-13.dat	CryptoLocker_rule2
behavioral2/memory/824-19-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4236-27-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/824-0-0x0000000008000000-0x000000000800E000-memory.dmp	UPX
behavioral2/files/0x001100000002324d-13.dat	UPX
behavioral2/memory/824-19-0x0000000008000000-0x000000000800E000-memory.dmp	UPX
behavioral2/memory/4236-27-0x0000000008000000-0x000000000800E000-memory.dmp	UPX

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	2024-05-28_44380f7eeaa8c1cc6c6e42ba964922ee_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4236	lossy.exe

UPX packed file 4 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral2/memory/824-0-0x0000000008000000-0x000000000800E000-memory.dmp	upx
behavioral2/files/0x001100000002324d-13.dat	upx
behavioral2/memory/824-19-0x0000000008000000-0x000000000800E000-memory.dmp	upx
behavioral2/memory/4236-27-0x0000000008000000-0x000000000800E000-memory.dmp	upx

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 824 wrote to memory of 4236	824	2024-05-28_44380f7eeaa8c1cc6c6e42ba964922ee_cryptolocker.exe	90
PID 824 wrote to memory of 4236	824	2024-05-28_44380f7eeaa8c1cc6c6e42ba964922ee_cryptolocker.exe	90
PID 824 wrote to memory of 4236	824	2024-05-28_44380f7eeaa8c1cc6c6e42ba964922ee_cryptolocker.exe	90

C:\Users\Admin\AppData\Local\Temp\2024-05-28_44380f7eeaa8c1cc6c6e42ba964922ee_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-28_44380f7eeaa8c1cc6c6e42ba964922ee_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:824
- C:\Users\Admin\AppData\Local\Temp\lossy.exe
  "C:\Users\Admin\AppData\Local\Temp\lossy.exe"
  2⤵
  - Executes dropped EXE
  PID:4236

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=4076 --field-trial-handle=2280,i,11703952675008463361,17436195144517971517,262144 --variations-seed-version /prefetch:8
1⤵
PID:3420

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\lossy.exe

Filesize
35KB

MD5
9c41db9f36499a25d8d9bf3074c1dfd3

SHA1
644e7c5d0781cb0b72b3ec5dea45ed97b3e4bb37

SHA256
841c9ca6101f144c45612168a17a706ee6d5a2d830843b29ee3c0e8d582e10a8

SHA512
e1f57209f904bd6260364adc667b22b2af42aa370d52104ebbfc6ab2f7064eaf0661fbc93625181f3f549151a44aefb6ba9db23114493fbb37175eab2a77fc1d

Download Submit
memory/824-0-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download
memory/824-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/824-2-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/824-3-0x0000000002060000-0x0000000002066000-memory.dmp

Filesize
24KB

Download
memory/824-19-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download
memory/4236-20-0x0000000002040000-0x0000000002046000-memory.dmp

Filesize
24KB

Download
memory/4236-26-0x0000000002140000-0x0000000002146000-memory.dmp

Filesize
24KB

Download
memory/4236-27-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download