1dd9c941ed87b9973a1061f4605a9893b822fa7265ca54eb3f4a27e9dd276d24

Analysis

max time kernel
150s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
31/05/2024, 19:24

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General

Target

2024-05-31_00604eab06bbcf13d48fde0f1e077f06_cryptolocker.exe
Size

34KB
MD5

00604eab06bbcf13d48fde0f1e077f06
SHA1

d1c4bf289e15e79906e56ffcf78c052c4261b2ce
SHA256

1dd9c941ed87b9973a1061f4605a9893b822fa7265ca54eb3f4a27e9dd276d24
SHA512

ac48ca90af3be01c75a69bf1dcb57d3bd6f1e766d0ee24ea4dfff22f9f145abbbef446dcd5d4ae483fce22f7280bd89e7fc4cbf106f388442591563657bd5d14
SSDEEP

384:bM7Q0pjC4GybxMv01d3AcASBQMf6i/zzzcYgUPSznStEkcsgqDx+:b/yC4GyNM01GuQMNXw2PSjSKkcJe+

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x00080000000235ba-12.dat	CryptoLocker_rule2

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-1-5-21-1181767204-2009306918-3718769404-1000\Control Panel\International\Geo\Nation	2024-05-31_00604eab06bbcf13d48fde0f1e077f06_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
5040	retln.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 2140 wrote to memory of 5040	2140	2024-05-31_00604eab06bbcf13d48fde0f1e077f06_cryptolocker.exe	92
PID 2140 wrote to memory of 5040	2140	2024-05-31_00604eab06bbcf13d48fde0f1e077f06_cryptolocker.exe	92
PID 2140 wrote to memory of 5040	2140	2024-05-31_00604eab06bbcf13d48fde0f1e077f06_cryptolocker.exe	92

C:\Users\Admin\AppData\Local\Temp\2024-05-31_00604eab06bbcf13d48fde0f1e077f06_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-31_00604eab06bbcf13d48fde0f1e077f06_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2140
- C:\Users\Admin\AppData\Local\Temp\retln.exe
  "C:\Users\Admin\AppData\Local\Temp\retln.exe"
  2⤵
  - Executes dropped EXE
  PID:5040

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 --field-trial-handle=1288,i,11746347647270949551,7786733067759450703,262144 --variations-seed-version --mojo-platform-channel-handle=3940 /prefetch:8
1⤵
PID:4608

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\retln.exe

Filesize
34KB

MD5
efbf5a18770f812093d623650db64f4e

SHA1
f6adabc84008dbf50eeb50d76fe724a6f68641f0

SHA256
5c942bd951e8a03227cb9f318abf8ecd49b42b91eabaa9fefe273ad5d7efc1ec

SHA512
b60486508d4379d89c1ca33d4f9223467c9c38c471085fd3a46fb10650171e35ce53f4dc23b5a06db47fda6ca0cd460a3f140b19ff0b19fefdaaba866ca5098d

Download Submit
memory/2140-0-0x0000000000600000-0x0000000000606000-memory.dmp

Filesize
24KB

Download
memory/2140-1-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/2140-8-0x00007FF9B07F0000-0x00007FF9B09E5000-memory.dmp

Filesize
2.0MB

Download
memory/5040-25-0x00007FF9B07F0000-0x00007FF9B09E5000-memory.dmp

Filesize
2.0MB

Download
memory/5040-28-0x00007FF9B07F0000-0x00007FF9B09E5000-memory.dmp

Filesize
2.0MB

Download