733fbc856fb7b1463c792ac81d7ebc7b690757a7b0a6be7a6436b4a4ac13a39b

Analysis

max time kernel
157s
max time network
167s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
13/03/2024, 22:27

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General

Target

2024-03-13_55bf61b811e609119117c02367263cf3_cryptolocker.exe
Size

50KB
MD5

55bf61b811e609119117c02367263cf3
SHA1

eb7edafd2aee92ca4a61b9880e770ce117374355
SHA256

733fbc856fb7b1463c792ac81d7ebc7b690757a7b0a6be7a6436b4a4ac13a39b
SHA512

587fb6d1c8dbaddbe79c6378283bf430ecd3a9a1977bc3be1a58e29173c287f3627159fdc2ed96fcf403a58d15ebfcaa349805932c110d1a609c4837320702c8
SSDEEP

768:79inqyNR/QtOOtEvwDpjBK/rJ+Nw8qnTHYhm3:79mqyNhQMOtEvwDpjBxe8Gp

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/3504-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0005000000022d20-13.dat	CryptoLocker_rule2
behavioral2/memory/4952-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3504-22-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/3504-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0005000000022d20-13.dat	CryptoLocker_set1
behavioral2/memory/4952-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3504-22-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

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	2024-03-13_55bf61b811e609119117c02367263cf3_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4952	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 3504 wrote to memory of 4952	3504	2024-03-13_55bf61b811e609119117c02367263cf3_cryptolocker.exe	100
PID 3504 wrote to memory of 4952	3504	2024-03-13_55bf61b811e609119117c02367263cf3_cryptolocker.exe	100
PID 3504 wrote to memory of 4952	3504	2024-03-13_55bf61b811e609119117c02367263cf3_cryptolocker.exe	100

C:\Users\Admin\AppData\Local\Temp\2024-03-13_55bf61b811e609119117c02367263cf3_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-13_55bf61b811e609119117c02367263cf3_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3504
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4952

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=3612 --field-trial-handle=2284,i,9807419199535700662,2319175108930815708,262144 --variations-seed-version /prefetch:8
1⤵
PID:4000

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
51KB

MD5
737a8886e19c74b51d93e01088b5c56b

SHA1
17a85852f50b10c8a8fa7a35c9bce4ab1c22929a

SHA256
7379db27e159422e2f09b9fad6e42fba0a28e11c549f1ae69bdca292312f60cd

SHA512
1018cacba6b45f5680cb423f8302a1e1a96a13b0a42241e4ddbd51d1fd3fd1d93ee2bc01ef7b8feb19f625d94521a3b9447611af3add7ab0223db259e6fbc4f5

Download Submit
memory/3504-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/3504-1-0x0000000000620000-0x0000000000626000-memory.dmp

Filesize
24KB

Download
memory/3504-2-0x0000000000620000-0x0000000000626000-memory.dmp

Filesize
24KB

Download
memory/3504-3-0x00000000020F0000-0x00000000020F6000-memory.dmp

Filesize
24KB

Download
memory/3504-22-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/4952-17-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/4952-20-0x00000000005D0000-0x00000000005D6000-memory.dmp

Filesize
24KB

Download
memory/4952-19-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download