264c74e0a84130f9990cd5f794fb323f630f2f761d87dc510d22e79203f37da7

Analysis

max time kernel
145s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
26/04/2024, 04:44

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General

Target

2024-04-26_635a4b7a6522727705bc276265093af1_cryptolocker.exe
Size

48KB
MD5

635a4b7a6522727705bc276265093af1
SHA1

40fc9e87e5eb3780eff14325426a7c02c0484719
SHA256

264c74e0a84130f9990cd5f794fb323f630f2f761d87dc510d22e79203f37da7
SHA512

3c4ceced6c5de789c9277f360298d38e0fe161e863fe2b6dcccafeed4352857a0eb1f92dfe52d42aa4b3a054737b4ba2f60380b00fa45cb31752ec07cb5570fe
SSDEEP

768:qmOKYQDf5XdrDmjr5tOOtEvwDpjAajFEitQbDmoSQCVUBJUkQqAHBIG05W2Mo2pK:qmbhXDmjr5MOtEvwDpj5cDtKkQZQ7

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/4028-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000900000002325f-13.dat	CryptoLocker_rule2
behavioral2/memory/4196-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4028-21-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4196-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 2 IoCs

resource	yara_rule
behavioral2/memory/4028-21-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4196-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/4028-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000900000002325f-13.dat	UPX
behavioral2/memory/4196-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4028-21-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4196-27-0x0000000000500000-0x0000000000510000-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-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	2024-04-26_635a4b7a6522727705bc276265093af1_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4196	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 4028 wrote to memory of 4196	4028	2024-04-26_635a4b7a6522727705bc276265093af1_cryptolocker.exe	91
PID 4028 wrote to memory of 4196	4028	2024-04-26_635a4b7a6522727705bc276265093af1_cryptolocker.exe	91
PID 4028 wrote to memory of 4196	4028	2024-04-26_635a4b7a6522727705bc276265093af1_cryptolocker.exe	91

C:\Users\Admin\AppData\Local\Temp\2024-04-26_635a4b7a6522727705bc276265093af1_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-26_635a4b7a6522727705bc276265093af1_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4028
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4196

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=3996 --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
48KB

MD5
0235785a191deb10e28272770a75aaa1

SHA1
298bd71d52edcbafda19aa526e45eb7f0d089875

SHA256
8a381ed729e8a79483160f5c66b60fe775ae772b9cbd9667a4ca8034c21f4bf2

SHA512
6acdee5a80795fef83e93e29a6ea7dcea384aba37ad21a312fb2d6ddc232cb50ddc4e3993b645b141aa781217d96df46c81086e50d3804646893573bb76c7f7e

Download Submit
memory/4028-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4028-1-0x0000000002140000-0x0000000002146000-memory.dmp

Filesize
24KB

Download
memory/4028-2-0x0000000002140000-0x0000000002146000-memory.dmp

Filesize
24KB

Download
memory/4028-3-0x0000000002050000-0x0000000002056000-memory.dmp

Filesize
24KB

Download
memory/4028-21-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4196-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4196-19-0x00000000020F0000-0x00000000020F6000-memory.dmp

Filesize
24KB

Download
memory/4196-20-0x00000000006B0000-0x00000000006B6000-memory.dmp

Filesize
24KB

Download
memory/4196-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download