bba1f458f6442f000983ce53b2812418cadc1c9174849540657537466df1f94b

Analysis

max time kernel
150s
max time network
146s
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, 12:06

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General

Target

2024-04-05_a1a452a657a1c1ef0a26f3885acc6ea9_cryptolocker.exe
Size

43KB
MD5

a1a452a657a1c1ef0a26f3885acc6ea9
SHA1

4f85cf815155757eac144c7a5622c11b8ec5c892
SHA256

bba1f458f6442f000983ce53b2812418cadc1c9174849540657537466df1f94b
SHA512

586833b34ce1eec3b6099fc21bd43cc6a4c0c9a8e0aa5f7652b4fafc5a1dd07da0530234ee7922d8022a1d8966576728be35d11461f01b8b624dfcb2c2d13905
SSDEEP

768:b/yC4GyNM01GuQMNXw2PSjHPbSuYlW8PAq2j8:b/pYayGig5HjS3NPAqD

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x0008000000023212-12.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-1-5-21-399997616-3400990511-967324271-1000\Control Panel\International\Geo\Nation	2024-04-05_a1a452a657a1c1ef0a26f3885acc6ea9_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
872	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 316 wrote to memory of 872	316	2024-04-05_a1a452a657a1c1ef0a26f3885acc6ea9_cryptolocker.exe	87
PID 316 wrote to memory of 872	316	2024-04-05_a1a452a657a1c1ef0a26f3885acc6ea9_cryptolocker.exe	87
PID 316 wrote to memory of 872	316	2024-04-05_a1a452a657a1c1ef0a26f3885acc6ea9_cryptolocker.exe	87

C:\Users\Admin\AppData\Local\Temp\2024-04-05_a1a452a657a1c1ef0a26f3885acc6ea9_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-05_a1a452a657a1c1ef0a26f3885acc6ea9_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:316
- C:\Users\Admin\AppData\Local\Temp\retln.exe
  "C:\Users\Admin\AppData\Local\Temp\retln.exe"
  2⤵
  - Executes dropped EXE
  PID:872

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
43KB

MD5
15afd1fc2e60e2fd6032af0fcd491b3f

SHA1
83e5f8f424fea2bb6878dabcd095ca33d0f7cfcb

SHA256
bda4619bc8f631a0b46c367504baddc3b08c3f892ffa8e150f93fd87fa801dea

SHA512
98e97825c2988326a652ff488f77425bb4ec1af5b6c1dd71f6418949c52281c8fd1f7126e10b541ce19b222f86ced8e011afb073b7e037ea03d5160b98d9a8ef

Download Submit
memory/316-0-0x0000000002350000-0x0000000002356000-memory.dmp

Filesize
24KB

Download
memory/316-1-0x0000000002350000-0x0000000002356000-memory.dmp

Filesize
24KB

Download
memory/316-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/872-20-0x00000000006F0000-0x00000000006F6000-memory.dmp

Filesize
24KB

Download