8ff2018d19993b8fd38edc27d6471878eea748b3e98018bf4f9e8d5f5387ad00

Analysis

max time kernel
198s
max time network
209s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
18/01/2024, 23:16

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General

Target

2024-01-18_b8a58041a9532abad7d7a791d2392eab_cryptolocker.exe
Size

37KB
MD5

b8a58041a9532abad7d7a791d2392eab
SHA1

1b364a95688a0263610c0c8a0e2deec1cabf7e6e
SHA256

8ff2018d19993b8fd38edc27d6471878eea748b3e98018bf4f9e8d5f5387ad00
SHA512

5e73ec8b4ef5d9e015245dc0a32a1bb6420af6e649db970c0ad61522cb33879ae028c304995a1a51b375d695eb873ac3f74bdf0336558cc37ca06137cb7625b5
SSDEEP

384:bM7Q0pjC4GybxMv01d3AcASBQMf6i/zzzcYgUPSznHzl6AJvDSuYlxud:b/yC4GyNM01GuQMNXw2PSjHPbSuYlw

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x0003000000022763-12.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-1-5-21-983843758-932321429-1636175382-1000\Control Panel\International\Geo\Nation	2024-01-18_b8a58041a9532abad7d7a791d2392eab_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1676	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 5048 wrote to memory of 1676	5048	2024-01-18_b8a58041a9532abad7d7a791d2392eab_cryptolocker.exe	87
PID 5048 wrote to memory of 1676	5048	2024-01-18_b8a58041a9532abad7d7a791d2392eab_cryptolocker.exe	87
PID 5048 wrote to memory of 1676	5048	2024-01-18_b8a58041a9532abad7d7a791d2392eab_cryptolocker.exe	87

C:\Users\Admin\AppData\Local\Temp\2024-01-18_b8a58041a9532abad7d7a791d2392eab_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-01-18_b8a58041a9532abad7d7a791d2392eab_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:5048
- C:\Users\Admin\AppData\Local\Temp\retln.exe
  "C:\Users\Admin\AppData\Local\Temp\retln.exe"
  2⤵
  - Executes dropped EXE
  PID:1676

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
251eb7cea963a9643dd342e0296f6bac

SHA1
2df27a014542cd07eb9cfa307dd58fda1cbbbe30

SHA256
2f46f86fb858e56cf8be89b86301c7d91397dd08920f72753eb50f59ad2eba93

SHA512
955ddb90040777fe7e307a0c2aabef6c6b2152717b111549e290aa8314c56f45c6d44049fccfeb665321fdb7a3285c48672ce714fdcaca4eec2a4bd63d4f8d9c

Download Submit
memory/1676-20-0x0000000002110000-0x0000000002116000-memory.dmp

Filesize
24KB

Download
memory/5048-0-0x00000000021D0000-0x00000000021D6000-memory.dmp

Filesize
24KB

Download
memory/5048-1-0x00000000021D0000-0x00000000021D6000-memory.dmp

Filesize
24KB

Download
memory/5048-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download