c7724412a81fd3400def867f2bd763015a3c26fee6df794112a5b7c07a9c7ff7

Analysis

max time kernel
150s
max time network
157s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
16/03/2024, 10:39

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General

Target

2024-03-16_a76f75c83e66a940d4c9e57e9127bd11_cryptolocker.exe
Size

46KB
MD5

a76f75c83e66a940d4c9e57e9127bd11
SHA1

bd3627286928dafb25b6ecdd239e322f7b2cba14
SHA256

c7724412a81fd3400def867f2bd763015a3c26fee6df794112a5b7c07a9c7ff7
SHA512

43d73df335ae55987e02efd6c63ddf1e39957cd5e88eb0dac8c72de08a4d617f742b48e5b2584ffc3fac4567fd893cb483eaf2bec512999b140115b99004810a
SSDEEP

768:qmOKYQDf5XdrDmjr5tOOtEvwDpjAajFEitQbDmoSQCVUBJUkQqAHBIG05W2Mo2pa:qmbhXDmjr5MOtEvwDpj5cDtKkQZQL

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/1556-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000800000002333f-13.dat	CryptoLocker_rule2
behavioral2/memory/1556-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/988-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 2 IoCs

resource	yara_rule
behavioral2/memory/1556-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/988-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/1556-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000800000002333f-13.dat	UPX
behavioral2/memory/1556-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/988-26-0x0000000000500000-0x0000000000510000-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	2024-03-16_a76f75c83e66a940d4c9e57e9127bd11_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
988	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 1556 wrote to memory of 988	1556	2024-03-16_a76f75c83e66a940d4c9e57e9127bd11_cryptolocker.exe	96
PID 1556 wrote to memory of 988	1556	2024-03-16_a76f75c83e66a940d4c9e57e9127bd11_cryptolocker.exe	96
PID 1556 wrote to memory of 988	1556	2024-03-16_a76f75c83e66a940d4c9e57e9127bd11_cryptolocker.exe	96

C:\Users\Admin\AppData\Local\Temp\2024-03-16_a76f75c83e66a940d4c9e57e9127bd11_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-16_a76f75c83e66a940d4c9e57e9127bd11_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1556
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:988

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=3472 --field-trial-handle=2260,i,3303482231723870786,2954015409682154873,262144 --variations-seed-version /prefetch:8
1⤵
PID:4352

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
47KB

MD5
64bc3406ada4574fe9c6396458b2d74e

SHA1
3e2ce8fbff85bf64679dfb493388d7c5e37c73fd

SHA256
9a0db462352aa0016e6166e25dc2bf8a16718e530501c8ce78c444bdc518de2a

SHA512
4b170920fc9de77c422c1dd4d9e51aa5fd280d89d49e3e56fb35b45df7dcc75da245b05594edc30533bea168321a4579e144d6e5b477f7d0d277dd97113cb01f

Download Submit
memory/988-19-0x0000000000520000-0x0000000000526000-memory.dmp

Filesize
24KB

Download
memory/988-22-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/988-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1556-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1556-1-0x0000000002210000-0x0000000002216000-memory.dmp

Filesize
24KB

Download
memory/1556-2-0x0000000002210000-0x0000000002216000-memory.dmp

Filesize
24KB

Download
memory/1556-3-0x0000000002230000-0x0000000002236000-memory.dmp

Filesize
24KB

Download
memory/1556-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download