f5d50893caf665acf6bb387c8e5e2d6cf77db8aed19dea82e0d7972ee69a5deb

Analysis

max time kernel
151s
max time network
155s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
09/03/2024, 02:25

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General

Target

2024-03-09_280819db3a355c007d0f4ced0fbd1e10_cryptolocker.exe
Size

40KB
MD5

280819db3a355c007d0f4ced0fbd1e10
SHA1

3fe9c246cb9568373520e1712ac61fcfee58dc77
SHA256

f5d50893caf665acf6bb387c8e5e2d6cf77db8aed19dea82e0d7972ee69a5deb
SHA512

93608c7f70a760b28158cca921c1666f66f35156578dde21056931f0395083dce2c4935c0327edcbf0ef656cb163b52b845316028a0b71f375e0404b06219913
SSDEEP

384:bM7Q0pjC4GybxMv01d3AcASBQMf6i/zzzcYgUPSznHzl6AJvDSuYlxujsFwF:b/yC4GyNM01GuQMNXw2PSjHPbSuYlaJF

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x000800000002325a-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	2024-03-09_280819db3a355c007d0f4ced0fbd1e10_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2136	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 2440 wrote to memory of 2136	2440	2024-03-09_280819db3a355c007d0f4ced0fbd1e10_cryptolocker.exe	99
PID 2440 wrote to memory of 2136	2440	2024-03-09_280819db3a355c007d0f4ced0fbd1e10_cryptolocker.exe	99
PID 2440 wrote to memory of 2136	2440	2024-03-09_280819db3a355c007d0f4ced0fbd1e10_cryptolocker.exe	99

C:\Users\Admin\AppData\Local\Temp\2024-03-09_280819db3a355c007d0f4ced0fbd1e10_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-09_280819db3a355c007d0f4ced0fbd1e10_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2440
- C:\Users\Admin\AppData\Local\Temp\retln.exe
  "C:\Users\Admin\AppData\Local\Temp\retln.exe"
  2⤵
  - Executes dropped EXE
  PID:2136

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=4088 --field-trial-handle=2676,i,447940133669489189,1353734109898858672,262144 --variations-seed-version /prefetch:8
1⤵
PID:1552

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
f606b8af73b2e8a5214dc095d751401a

SHA1
d7cafe3bf3b5711ba0da8b7500c09693143a86db

SHA256
291fc40fdaf72dc3e08de1c947098bab3d40764c33e31d68c7d8f7b92592b62d

SHA512
a3db2fb841ae5d85e659d5296a1451c20c5aa85cb290abc0086e3965dfb470584c25624ddf0617eecf157479110bd652e803cb8d7dd0b81789397980e046556a

Download Submit
memory/2136-20-0x0000000002210000-0x0000000002216000-memory.dmp

Filesize
24KB

Download
memory/2440-0-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

Filesize
24KB

Download
memory/2440-1-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

Filesize
24KB

Download
memory/2440-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download