43610cd9d3668991734e07da2801f68a708a2cbcc3e37b65a25ef9630abd7463

Analysis

max time kernel
151s
max time network
154s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
26/03/2024, 23:31

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General

Target

2024-03-26_4d4e7044716e2ac47e0e75b14445d02a_cryptolocker.exe
Size

74KB
MD5

4d4e7044716e2ac47e0e75b14445d02a
SHA1

c38cb3abfb1a98b15ddf2cbc324338c7cda4ce18
SHA256

43610cd9d3668991734e07da2801f68a708a2cbcc3e37b65a25ef9630abd7463
SHA512

e2096b78b3168e7f9739a2c0c4a079027d360df1d708baf32e8227d35d01485a9b013c8c04e14c347bb02e01e64726f71f320e168e3c5ce8974a9018b98f31e1
SSDEEP

1536:X6QFElP6n+gJQMOtEvwDpjBZYTjipvF2bx1sd:X6a+SOtEvwDpjBZYvQd2y

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x00030000000227e7-12.dat	CryptoLocker_rule2

Detection of Cryptolocker Samples 1 IoCs

resource	yara_rule
behavioral2/files/0x00030000000227e7-12.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-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	2024-03-26_4d4e7044716e2ac47e0e75b14445d02a_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
684	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 456 wrote to memory of 684	456	2024-03-26_4d4e7044716e2ac47e0e75b14445d02a_cryptolocker.exe	98
PID 456 wrote to memory of 684	456	2024-03-26_4d4e7044716e2ac47e0e75b14445d02a_cryptolocker.exe	98
PID 456 wrote to memory of 684	456	2024-03-26_4d4e7044716e2ac47e0e75b14445d02a_cryptolocker.exe	98

C:\Users\Admin\AppData\Local\Temp\2024-03-26_4d4e7044716e2ac47e0e75b14445d02a_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-26_4d4e7044716e2ac47e0e75b14445d02a_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:456
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:684

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=1424 --field-trial-handle=2180,i,12780723798465539942,12010519452607841069,262144 --variations-seed-version /prefetch:8
1⤵
PID:4848

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
9502ab9a16e6713693f24e1d3a3c48e1

SHA1
fcbb60ff294d0dbf0911f62da364e37ce4e99931

SHA256
ec0668f8e6995a8ecf3ae7a9254b836717c96d1c6c5ec4aa737bb34bcf0027c6

SHA512
bc7ee35d07312268771b983444ba479aeac505090abd6267083bfec288df16ae98cb171a4977b1442a974315609d58a3ade5c47bad135638e3c700b2f7e74d14

Download Submit
memory/456-0-0x00000000005E0000-0x00000000005E6000-memory.dmp

Filesize
24KB

Download
memory/456-1-0x00000000005E0000-0x00000000005E6000-memory.dmp

Filesize
24KB

Download
memory/456-2-0x0000000000610000-0x0000000000616000-memory.dmp

Filesize
24KB

Download
memory/684-17-0x00000000005C0000-0x00000000005C6000-memory.dmp

Filesize
24KB

Download
memory/684-18-0x00000000005E0000-0x00000000005E6000-memory.dmp

Filesize
24KB

Download