4e77b831a488f99fbe9720fdcf6c562298ac83c51c8f80e7e25f8cd780af6f5a

Analysis

max time kernel
147s
max time network
156s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
25-03-2024 16:28

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General

Target

2024-03-25_2eb70e8351d1afa53505c0e76bba5449_cryptolocker.exe
Size

74KB
MD5

2eb70e8351d1afa53505c0e76bba5449
SHA1

7693fb0af9fd9ac634bcd576802642cc9de99cce
SHA256

4e77b831a488f99fbe9720fdcf6c562298ac83c51c8f80e7e25f8cd780af6f5a
SHA512

06f3c5c357e131674d7df1c1a6c181b5d16477e7459362224bff6c3b7dcc071d4e3d315ef7db7f6eb4d73bdc21ab71866935bdd82062572e0548283c519e5a5c
SSDEEP

1536:X6QFElP6n+gJQMOtEvwDpjBZYTjipvF2bx1Ux:X6a+SOtEvwDpjBZYvQd2W

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x000800000001db2a-12.dat	CryptoLocker_rule2

Detection of Cryptolocker Samples 1 IoCs

resource	yara_rule
behavioral2/files/0x000800000001db2a-12.dat	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-1-5-21-1904519900-954640453-4250331663-1000\Control Panel\International\Geo\Nation	2024-03-25_2eb70e8351d1afa53505c0e76bba5449_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1020	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 1092 wrote to memory of 1020	1092	2024-03-25_2eb70e8351d1afa53505c0e76bba5449_cryptolocker.exe	97
PID 1092 wrote to memory of 1020	1092	2024-03-25_2eb70e8351d1afa53505c0e76bba5449_cryptolocker.exe	97
PID 1092 wrote to memory of 1020	1092	2024-03-25_2eb70e8351d1afa53505c0e76bba5449_cryptolocker.exe	97

C:\Users\Admin\AppData\Local\Temp\2024-03-25_2eb70e8351d1afa53505c0e76bba5449_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-25_2eb70e8351d1afa53505c0e76bba5449_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1092
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1020

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=3756 --field-trial-handle=2268,i,8796662530135712346,11409037572378858775,262144 --variations-seed-version /prefetch:8
1⤵
PID:4548

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
74KB

MD5
4fcf990334a356a3b9165ef884a29c72

SHA1
c337a523b8153e49afd5e31a3afdf716d3cd34b0

SHA256
59d28906adfca2e1f41fe349b45a213c19e083e6f05400cf53d579cbfdb1af0a

SHA512
c52993585bc30606a44500dedcfc05abe533ed3bde66480e4d9af682021446f75e34ed62cfb285817736d5efaef6d01da689f865e3bc9817059e74667cf0b0bc

Download Submit
memory/1020-17-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/1020-19-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/1092-0-0x00000000021C0000-0x00000000021C6000-memory.dmp

Filesize
24KB

Download
memory/1092-1-0x00000000021C0000-0x00000000021C6000-memory.dmp

Filesize
24KB

Download
memory/1092-2-0x00000000020D0000-0x00000000020D6000-memory.dmp

Filesize
24KB

Download