3a4f2d6ffcb992cad08ce6176d1e71b2ad608cbefcb4931862ae1fd94dc028d5

Analysis

max time kernel
141s
max time network
159s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
21/04/2024, 04:53

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General

Target

2024-04-21_a12921d308299ee90fc96a9420757e0a_cryptolocker.exe
Size

69KB
MD5

a12921d308299ee90fc96a9420757e0a
SHA1

0f25743e2e6e9bae3fb92acbfa34534e03ecf9dc
SHA256

3a4f2d6ffcb992cad08ce6176d1e71b2ad608cbefcb4931862ae1fd94dc028d5
SHA512

ad87aa41bc20fef69fd902cad67fb97bef2b46c5159f40ad9343a83b245da490008e0306ec5b086700dc2037021f4b27a30466d9e9097e349df27dbed4039ce6
SSDEEP

1536:Dk/xY0sllyGQMOtEvwDpjwycDtKkQZQRKb61vSbgZ3QzNKU50g:DW60sllyWOtEvwDpjwF85b

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 3 IoCs

resource	yara_rule
behavioral2/memory/1072-0-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000900000002326d-13.dat	CryptoLocker_rule2
behavioral2/memory/1072-19-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 3 IoCs

resource	yara_rule
behavioral2/memory/1072-0-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000900000002326d-13.dat	CryptoLocker_set1
behavioral2/memory/1072-19-0x0000000000500000-0x000000000050B000-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	2024-04-21_a12921d308299ee90fc96a9420757e0a_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4720	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 1072 wrote to memory of 4720	1072	2024-04-21_a12921d308299ee90fc96a9420757e0a_cryptolocker.exe	91
PID 1072 wrote to memory of 4720	1072	2024-04-21_a12921d308299ee90fc96a9420757e0a_cryptolocker.exe	91
PID 1072 wrote to memory of 4720	1072	2024-04-21_a12921d308299ee90fc96a9420757e0a_cryptolocker.exe	91

C:\Users\Admin\AppData\Local\Temp\2024-04-21_a12921d308299ee90fc96a9420757e0a_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-21_a12921d308299ee90fc96a9420757e0a_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1072
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4720

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=1732 --field-trial-handle=2180,i,12780723798465539942,12010519452607841069,262144 --variations-seed-version /prefetch:8
1⤵
PID:2424

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
69KB

MD5
4d6623f901fb3c6e79576d766a9c0ac3

SHA1
b418ef498de3c9dbbd448d6566d874dfcce3462d

SHA256
8c63ddbed7fc698e412d6804cc9a33963c2a7d976c0380a12f72ee14f5d61eff

SHA512
8f825beac05690499cd2805a6531f78923f72f6211e031f128b73c1fbabc2825ec0c57eab5e645434ab864234314f5b9e326680f30de329b5d2d2c1ace8f7592

Download Submit
memory/1072-0-0x0000000000500000-0x000000000050B000-memory.dmp

Filesize
44KB

Download
memory/1072-1-0x00000000005F0000-0x00000000005F6000-memory.dmp

Filesize
24KB

Download
memory/1072-2-0x00000000005F0000-0x00000000005F6000-memory.dmp

Filesize
24KB

Download
memory/1072-3-0x0000000000610000-0x0000000000616000-memory.dmp

Filesize
24KB

Download
memory/1072-19-0x0000000000500000-0x000000000050B000-memory.dmp

Filesize
44KB

Download
memory/4720-20-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/4720-18-0x00000000005E0000-0x00000000005E6000-memory.dmp

Filesize
24KB

Download