155f039c3984bf5f5890451172b96ead2b4e939da454c5cfdc3dc0698b079237

Analysis

max time kernel
153s
max time network
158s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
05/04/2024, 03:27

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General

Target

2024-04-05_0f37bd4909d92be7c3a7a4d403a13ca4_cryptolocker.exe
Size

37KB
MD5

0f37bd4909d92be7c3a7a4d403a13ca4
SHA1

e2e612b7b7d989aa2055d0549c4e7eba799d1773
SHA256

155f039c3984bf5f5890451172b96ead2b4e939da454c5cfdc3dc0698b079237
SHA512

46fffc12f96ff1e29cbc214da83f411322aff9ee1ac3ea659175da0a41565a87e58ec2b86e671c2ee202e5ebac98a0cefb82b97148a2f319ec03d1671eed5b2c
SSDEEP

384:bM7Q0pjC4GybxMv01d3AcASBQMf6i/zzzcYgUPSznHzu02lOQAvO+:b/yC4GyNM01GuQMNXw2PSjHC02ltAvZ

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x0008000000023260-12.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	2024-04-05_0f37bd4909d92be7c3a7a4d403a13ca4_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
216	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 744 wrote to memory of 216	744	2024-04-05_0f37bd4909d92be7c3a7a4d403a13ca4_cryptolocker.exe	96
PID 744 wrote to memory of 216	744	2024-04-05_0f37bd4909d92be7c3a7a4d403a13ca4_cryptolocker.exe	96
PID 744 wrote to memory of 216	744	2024-04-05_0f37bd4909d92be7c3a7a4d403a13ca4_cryptolocker.exe	96

C:\Users\Admin\AppData\Local\Temp\2024-04-05_0f37bd4909d92be7c3a7a4d403a13ca4_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-05_0f37bd4909d92be7c3a7a4d403a13ca4_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:744
- C:\Users\Admin\AppData\Local\Temp\retln.exe
  "C:\Users\Admin\AppData\Local\Temp\retln.exe"
  2⤵
  - Executes dropped EXE
  PID:216

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=1340 --field-trial-handle=2292,i,2103142837140538807,15881446839139365070,262144 --variations-seed-version /prefetch:8
1⤵
PID:3760

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
37KB

MD5
993b014c895d315fca6ce328134ac921

SHA1
9266f67cf59cb558bdd520d824eaaf4062f91ed2

SHA256
433ec812422682ca5a5d862a220695f924c66ae8acc627a18c8042735da04949

SHA512
7dbcf2bf556238681b36e6e88d3e1fa0d13202fb5284ec2d8e509d05f199f41a63e952c623093e763bdcc84d903df6c0a42fec29fb49fa829742b4934dad4084

Download Submit
memory/216-19-0x0000000002090000-0x0000000002096000-memory.dmp

Filesize
24KB

Download
memory/744-0-0x0000000002350000-0x0000000002356000-memory.dmp

Filesize
24KB

Download
memory/744-1-0x0000000002350000-0x0000000002356000-memory.dmp

Filesize
24KB

Download
memory/744-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download