bf9dfec755ef003ea3cb931937f7034f5f5cbe07c97da537eb88d7e28bd65b2e

Analysis

max time kernel
134s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
19/03/2024, 18:03

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General

Target

2024-03-19_fb4a23de4dd80b07cbfaf696ed01ea76_cryptolocker.exe
Size

122KB
MD5

fb4a23de4dd80b07cbfaf696ed01ea76
SHA1

06736bc18a3e8dded443aa843227c228f5c4986f
SHA256

bf9dfec755ef003ea3cb931937f7034f5f5cbe07c97da537eb88d7e28bd65b2e
SHA512

44608b3385e0029e8dde2925c2c9b329c451142e0bc6e46ac174958d8844f3a46aa0684c5a52cb38fc0fa50eea65caaefdfee3f468fac4c9b1ba83b6d50cf22e
SSDEEP

1536:u6QFElP6n+gWMOtEvwDpjJGYQbN/PKwMg/:u6a++OtEvwDpj6zb

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	2024-03-19_fb4a23de4dd80b07cbfaf696ed01ea76_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4940	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 2748 wrote to memory of 4940	2748	2024-03-19_fb4a23de4dd80b07cbfaf696ed01ea76_cryptolocker.exe	96
PID 2748 wrote to memory of 4940	2748	2024-03-19_fb4a23de4dd80b07cbfaf696ed01ea76_cryptolocker.exe	96
PID 2748 wrote to memory of 4940	2748	2024-03-19_fb4a23de4dd80b07cbfaf696ed01ea76_cryptolocker.exe	96

C:\Users\Admin\AppData\Local\Temp\2024-03-19_fb4a23de4dd80b07cbfaf696ed01ea76_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-19_fb4a23de4dd80b07cbfaf696ed01ea76_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2748
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4940

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=4124 --field-trial-handle=2256,i,18272763564106695635,11201593968620719822,262144 --variations-seed-version /prefetch:8
1⤵
PID:4356

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
123KB

MD5
b7b21b1a975915508b104b59881b4e2f

SHA1
e2c5672c4828e15adffea8071a19f8b987199876

SHA256
23613d38a4fb97b413fe4af7d40b9bd94a1bb13deb30c9f24478e9852b9c295a

SHA512
da97c96df9387b07e90ec446ba748531d9e6b17fdc92ae25d7ec56fc2a8a42c8a1a9b77c98ad97e5b9218a11a474e9ab2b05c40536c6d424a1cbbc829337bf7c

Download Submit
memory/2748-0-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/2748-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/2748-2-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/4940-17-0x0000000002100000-0x0000000002106000-memory.dmp

Filesize
24KB

Download
memory/4940-21-0x0000000002050000-0x0000000002056000-memory.dmp

Filesize
24KB

Download