c6ab6d700a7a080b5872ee3c659ad29fd7085cb90238eca07f68a3129f16a857

Analysis

max time kernel
151s
max time network
154s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
12/02/2024, 10:11

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General

Target

2024-02-12_c16cde56c9964ff6428ee7f0d56a4f45_cryptolocker.exe
Size

40KB
MD5

c16cde56c9964ff6428ee7f0d56a4f45
SHA1

42b116d009bc416349fdd9f11dff8c3d8a2e4e64
SHA256

c6ab6d700a7a080b5872ee3c659ad29fd7085cb90238eca07f68a3129f16a857
SHA512

4f7dccfe0521e94fb66f056769b55ef9cdba3d053fa041e9c71a574d3217babadb4f77c243c0e406bdde3b66a8377d8ba2d34cf0aab716322b65092e64b0e9c4
SSDEEP

768:b/yC4GyNM01GuQMNXw2PSjHPbSuYlW8PAqLu:b/pYayGig5HjS3NPAqK

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x0007000000023146-12.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-1-5-21-3073191680-435865314-2862784915-1000\Control Panel\International\Geo\Nation	2024-02-12_c16cde56c9964ff6428ee7f0d56a4f45_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
956	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 3540 wrote to memory of 956	3540	2024-02-12_c16cde56c9964ff6428ee7f0d56a4f45_cryptolocker.exe	84
PID 3540 wrote to memory of 956	3540	2024-02-12_c16cde56c9964ff6428ee7f0d56a4f45_cryptolocker.exe	84
PID 3540 wrote to memory of 956	3540	2024-02-12_c16cde56c9964ff6428ee7f0d56a4f45_cryptolocker.exe	84

C:\Users\Admin\AppData\Local\Temp\2024-02-12_c16cde56c9964ff6428ee7f0d56a4f45_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-12_c16cde56c9964ff6428ee7f0d56a4f45_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3540
- C:\Users\Admin\AppData\Local\Temp\retln.exe
  "C:\Users\Admin\AppData\Local\Temp\retln.exe"
  2⤵
  - Executes dropped EXE
  PID:956

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
45d9f51cfcdfd5582b556e8648b57dde

SHA1
a3f60b43a1d7ed96f23f6453aa54ad8444532344

SHA256
50a153d868c9cd4168b312748964960f073369ad3841418a5275171d4cec4bb8

SHA512
6ed8f5751e5621a6d4b5257938829d72704270ff2e439240b612388faf7f46ecac09fdeb8bdf4af002dc6882ed7f21cf191f01183f179a5f64d2adf7923e67a4

Download Submit
memory/956-19-0x0000000000730000-0x0000000000736000-memory.dmp

Filesize
24KB

Download
memory/3540-0-0x0000000002350000-0x0000000002356000-memory.dmp

Filesize
24KB

Download
memory/3540-1-0x0000000002350000-0x0000000002356000-memory.dmp

Filesize
24KB

Download
memory/3540-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download