fe8d62008ecbdcf55a19ea2c83d266090bec39f460a8ab6b876e0da133a87796

Analysis

max time kernel
147s
max time network
162s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
06/03/2024, 01:33

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General

Target

2024-03-06_2dcd3ea6c4e00777181b7824e09d6a59_cryptolocker.exe
Size

61KB
MD5

2dcd3ea6c4e00777181b7824e09d6a59
SHA1

37306abcab5540fc37f68af6db1a6b429cdb1e79
SHA256

fe8d62008ecbdcf55a19ea2c83d266090bec39f460a8ab6b876e0da133a87796
SHA512

7f8ba5b3f8f2d91f8c7601f14ae6c85d751f0a69324b07b635514b03902a23b7c16ac023dbb148aa8cf312af3ed57c74bda7137a8063afa4a3a3e4a00c190cb9
SSDEEP

1536:qmbhXDmjr5MOtEvwDpj5cDtKkQZQRKb61vSbgtsxa:BbdDmjr+OtEvwDpjM8A

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/3100-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000800000002333b-13.dat	CryptoLocker_rule2
behavioral2/memory/3100-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3624-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 2 IoCs

resource	yara_rule
behavioral2/memory/3100-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3624-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/3100-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000800000002333b-13.dat	UPX
behavioral2/memory/3100-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/3624-26-0x0000000000500000-0x0000000000510000-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-1-5-21-1904519900-954640453-4250331663-1000\Control Panel\International\Geo\Nation	2024-03-06_2dcd3ea6c4e00777181b7824e09d6a59_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3624	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 3100 wrote to memory of 3624	3100	2024-03-06_2dcd3ea6c4e00777181b7824e09d6a59_cryptolocker.exe	98
PID 3100 wrote to memory of 3624	3100	2024-03-06_2dcd3ea6c4e00777181b7824e09d6a59_cryptolocker.exe	98
PID 3100 wrote to memory of 3624	3100	2024-03-06_2dcd3ea6c4e00777181b7824e09d6a59_cryptolocker.exe	98

C:\Users\Admin\AppData\Local\Temp\2024-03-06_2dcd3ea6c4e00777181b7824e09d6a59_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-06_2dcd3ea6c4e00777181b7824e09d6a59_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3100
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3624

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=3724 --field-trial-handle=2972,i,4036376905309803364,5412922217215781933,262144 --variations-seed-version /prefetch:8
1⤵
PID:1364

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
62KB

MD5
f9747e0457a8742465deaacbad2d53bf

SHA1
9fa787e30f781bdc72aff9e2fadb8a88f0e74527

SHA256
afed1417bc0a696e179aa68887829e851f307f78cdf995a613afb2cade4e583b

SHA512
3c9d6577052a38262c37721c864db7c2d60cca45d81e9207043a4ea82c74e9eb32ac68718e94eb9a91049c6d98d07f0da65097307bdd4aef94e5edee52420bfb

Download Submit
memory/3100-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3100-1-0x0000000000620000-0x0000000000626000-memory.dmp

Filesize
24KB

Download
memory/3100-2-0x0000000000620000-0x0000000000626000-memory.dmp

Filesize
24KB

Download
memory/3100-3-0x0000000000750000-0x0000000000756000-memory.dmp

Filesize
24KB

Download
memory/3100-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3624-19-0x0000000000650000-0x0000000000656000-memory.dmp

Filesize
24KB

Download
memory/3624-21-0x0000000000630000-0x0000000000636000-memory.dmp

Filesize
24KB

Download
memory/3624-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download