3a30638769a8bbb52df05ffc499cc494bda92b496e4549bdabb842d0b9a7e2ff

Analysis

max time kernel
153s
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
27/02/2024, 16:24

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General

Target

2024-02-27_1eb970cf0148b2a37dfb8271c104eff9_cryptolocker.exe
Size

40KB
MD5

1eb970cf0148b2a37dfb8271c104eff9
SHA1

ce4c1c1d4b9abbc388b4e9bd1f42b1f991c49d6b
SHA256

3a30638769a8bbb52df05ffc499cc494bda92b496e4549bdabb842d0b9a7e2ff
SHA512

1c869b4be047b3b556e396b6679d7dc031e0fe3e8052519e94aa9b7dc87522249ae44e158539aa32bcf4a63d75b1982785b7d6d6900daa3ab2ec20bbc32688fb
SSDEEP

768:b/yC4GyNM01GuQMNXw2PSjHPbSuYlaVpv:b/pYayGig5HjS3SR

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x000700000002271f-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-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	2024-02-27_1eb970cf0148b2a37dfb8271c104eff9_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4480	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 2408 wrote to memory of 4480	2408	2024-02-27_1eb970cf0148b2a37dfb8271c104eff9_cryptolocker.exe	97
PID 2408 wrote to memory of 4480	2408	2024-02-27_1eb970cf0148b2a37dfb8271c104eff9_cryptolocker.exe	97
PID 2408 wrote to memory of 4480	2408	2024-02-27_1eb970cf0148b2a37dfb8271c104eff9_cryptolocker.exe	97

C:\Users\Admin\AppData\Local\Temp\2024-02-27_1eb970cf0148b2a37dfb8271c104eff9_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-27_1eb970cf0148b2a37dfb8271c104eff9_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2408
- C:\Users\Admin\AppData\Local\Temp\retln.exe
  "C:\Users\Admin\AppData\Local\Temp\retln.exe"
  2⤵
  - Executes dropped EXE
  PID:4480

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=4072 --field-trial-handle=1928,i,13242902252791919845,10377620236057253993,262144 --variations-seed-version /prefetch:8
1⤵
PID:4328

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
40KB

MD5
4378459c760469e6ac776101dc086a5f

SHA1
2216dff74367a000e9e40f78d9536c7d149b7da5

SHA256
56a509348f287b2f31870a5dd9812e94c33b8d3fba3f352e466f433d672a5303

SHA512
dfb02b1f2d42f96d07959da6b98d2d494a46872284a0fd43682d339808f35c47f75a526615ceabc174348850f9daeb59a95a0d66ecaeda1d1c66be6f7b0b7be4

Download Submit
memory/2408-0-0x0000000002210000-0x0000000002216000-memory.dmp

Filesize
24KB

Download
memory/2408-1-0x0000000002210000-0x0000000002216000-memory.dmp

Filesize
24KB

Download
memory/2408-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download