21a2906745382fe5fde3dd327256233adccd1c8e11d63149d93e59ffa2b79fe6

Analysis

max time kernel
142s
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
08-03-2024 22:23

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General

Target

2024-03-08_0c6128555836783cbd0bf14f15d517b9_cryptolocker.exe
Size

63KB
MD5

0c6128555836783cbd0bf14f15d517b9
SHA1

e8e5ddd2c8e01eb3b7e1dd1327a2a1a8fa70d7e7
SHA256

21a2906745382fe5fde3dd327256233adccd1c8e11d63149d93e59ffa2b79fe6
SHA512

7afd253e0b884fbc5b779ebc7bb3b9946c67c998e88cd2969aa4c44aa5b29178093aac3d46bd8f9979a0b87ecda6c1ee80239831501ee17deb489c7b59b6fc58
SSDEEP

1536:V6QFElP6n+gMQMOtEvwDpjyaLccVCbmh85r:V6a+pOtEvwDpjv8

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x000400000002271f-12.dat	CryptoLocker_rule2

Detection of Cryptolocker Samples 1 IoCs

resource	yara_rule
behavioral2/files/0x000400000002271f-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	2024-03-08_0c6128555836783cbd0bf14f15d517b9_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
876	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 3304 wrote to memory of 876	3304	2024-03-08_0c6128555836783cbd0bf14f15d517b9_cryptolocker.exe	97
PID 3304 wrote to memory of 876	3304	2024-03-08_0c6128555836783cbd0bf14f15d517b9_cryptolocker.exe	97
PID 3304 wrote to memory of 876	3304	2024-03-08_0c6128555836783cbd0bf14f15d517b9_cryptolocker.exe	97

C:\Users\Admin\AppData\Local\Temp\2024-03-08_0c6128555836783cbd0bf14f15d517b9_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-08_0c6128555836783cbd0bf14f15d517b9_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3304
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:876

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=1404 --field-trial-handle=2252,i,16504368816373493055,9578615028378602855,262144 --variations-seed-version /prefetch:8
1⤵
PID:3512

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
63KB

MD5
2e7b28ecd1d242ab2d3a4c0707fd23d1

SHA1
a1ffcfcefab6b2a198ab2e47bab7d202644de33c

SHA256
133e907f124d70d94614bd79b0f7b68a70a0056bf127488c502dcabeb44fa610

SHA512
e971ed7f088b8dc14866aef06ef3a8db4dbf3e3712f8f07f3af0fed8bb4451e735f913001adb82cbce409a61d9297080e3d7a3307e998619de2c19d570057162

Download Submit
memory/876-18-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/876-17-0x0000000000590000-0x0000000000596000-memory.dmp

Filesize
24KB

Download
memory/3304-0-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/3304-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/3304-2-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download