6a9d9c3dc24ce8476ba06efc5bb042a04484e6dfe6287d22469468f6589c8d95

Analysis

max time kernel
150s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
01-06-2024 13:30

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General

Target

2024-06-01_561894c5a65d05a1da8b2699311c22a6_cryptolocker.exe
Size

38KB
MD5

561894c5a65d05a1da8b2699311c22a6
SHA1

d797dc482274cc9a6886c76407dbdcb2538567c1
SHA256

6a9d9c3dc24ce8476ba06efc5bb042a04484e6dfe6287d22469468f6589c8d95
SHA512

bbdecb9369f3e52d40962ada5d48cd7cc49d12db301edda898d27583e02007b31ec87df75f37c506fedcece21400f42964bd51e923b6d78859204cba46820a43
SSDEEP

768:qTVbxjgQNQXtckstOOtEvwDpjAaD3TUogs/VXpAPWR0:qTJu9cvMOtEvwDpjppVXzR0

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/3264-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000900000002325f-13.dat	CryptoLocker_rule2
behavioral2/memory/3264-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4664-27-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/3264-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000900000002325f-13.dat	CryptoLocker_set1
behavioral2/memory/3264-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4664-27-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/3264-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/files/0x000900000002325f-13.dat	UPX
behavioral2/memory/3264-26-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/4664-27-0x0000000000500000-0x000000000050F000-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	2024-06-01_561894c5a65d05a1da8b2699311c22a6_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4664	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3264-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/files/0x000900000002325f-13.dat	upx
behavioral2/memory/3264-26-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/4664-27-0x0000000000500000-0x000000000050F000-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 3264 wrote to memory of 4664	3264	2024-06-01_561894c5a65d05a1da8b2699311c22a6_cryptolocker.exe	91
PID 3264 wrote to memory of 4664	3264	2024-06-01_561894c5a65d05a1da8b2699311c22a6_cryptolocker.exe	91
PID 3264 wrote to memory of 4664	3264	2024-06-01_561894c5a65d05a1da8b2699311c22a6_cryptolocker.exe	91

C:\Users\Admin\AppData\Local\Temp\2024-06-01_561894c5a65d05a1da8b2699311c22a6_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-01_561894c5a65d05a1da8b2699311c22a6_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3264
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4664

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:1272

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
39KB

MD5
d6733bcf32fdcb2995a10c49d482d1ed

SHA1
86648d2452353dfc39fec3f43e0c495ebbb797de

SHA256
71d578569a40436d5cc0206f3abc00c3b1989509386276cde6949c7e63f637c7

SHA512
6006635aa0dae9a117f9222b7edde756d788b590423f00eebb0add49fb3b88f7c30b040d8ec3d283435f17a5229ba592ef60f697a331eaae2df4c97ecf1e60cf

Download Submit
memory/3264-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/3264-1-0x0000000000620000-0x0000000000626000-memory.dmp

Filesize
24KB

Download
memory/3264-2-0x0000000000620000-0x0000000000626000-memory.dmp

Filesize
24KB

Download
memory/3264-3-0x0000000000650000-0x0000000000656000-memory.dmp

Filesize
24KB

Download
memory/3264-26-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/4664-18-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download
memory/4664-24-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/4664-27-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download