91e2204c2fb084836caca6f7ab16fd56f375320176dcf7ce8f810efdec957010

Analysis

max time kernel
150s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240412-en
resource tags

arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
submitted
24-04-2024 05:29

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General

Target

2024-04-24_1c33e1c05e1b9bac6ad6df08902677c1_cryptolocker.exe
Size

39KB
MD5

1c33e1c05e1b9bac6ad6df08902677c1
SHA1

2e05aba65f8639a876f214a10523149fa560917c
SHA256

91e2204c2fb084836caca6f7ab16fd56f375320176dcf7ce8f810efdec957010
SHA512

f822d9bd03c8825dc0d20ef717d6297bec0c5b42b171b1a2bcdcb827b2f83d58606d0da2f97d5e6e80850a537b5384505d1cc50d9e16afbbd8d474bf0080cb2b
SSDEEP

768:V6LsoEEeegiZPvEhHSG+gDYQtOOtEvwDpj/MLam5axZmGKz:V6QFElP6n+gMQMOtEvwDpjyaYa/mlz

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x000300000001e970-12.dat	CryptoLocker_rule2

Detection of Cryptolocker Samples 1 IoCs

resource	yara_rule
behavioral2/files/0x000300000001e970-12.dat	CryptoLocker_set1

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-1-5-21-2177723727-746291240-1644359950-1000\Control Panel\International\Geo\Nation	2024-04-24_1c33e1c05e1b9bac6ad6df08902677c1_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
408	asih.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 1076 wrote to memory of 408	1076	2024-04-24_1c33e1c05e1b9bac6ad6df08902677c1_cryptolocker.exe	85
PID 1076 wrote to memory of 408	1076	2024-04-24_1c33e1c05e1b9bac6ad6df08902677c1_cryptolocker.exe	85
PID 1076 wrote to memory of 408	1076	2024-04-24_1c33e1c05e1b9bac6ad6df08902677c1_cryptolocker.exe	85

C:\Users\Admin\AppData\Local\Temp\2024-04-24_1c33e1c05e1b9bac6ad6df08902677c1_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-24_1c33e1c05e1b9bac6ad6df08902677c1_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1076
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:408

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\asih.exe

Filesize
39KB

MD5
e5b58f363d0349762db5afe368cc11c4

SHA1
31dcf4d4488636b6aa13645ed56d51f03a3ccf4e

SHA256
64e1378ac6a7b467f59aa7bb72343596ac56ce5b8d7e3c71a31cc9e8630f5d30

SHA512
4dbcb76b09de5cc4645e7288db41635336e66b91b9d3cf1c993cbb46440d080ae884f80f47db39deaefb068b1e111ff4929d84b9a734c4175ecc507226425063

Download Submit
memory/408-17-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/408-20-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/1076-0-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/1076-1-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/1076-2-0x00000000006D0000-0x00000000006D6000-memory.dmp

Filesize
24KB

Download