4fb0ca8b8b260a4626ae9e5ceb82aec0819fe4df8f63dc85af916cde33fdafe7

Analysis

max time kernel
148s
max time network
149s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
22/02/2024, 00:53

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General

Target

2024-02-22_d1fd0c6ae0c15e653051adee2184b0d5_cryptolocker.exe
Size

58KB
MD5

d1fd0c6ae0c15e653051adee2184b0d5
SHA1

996a4b078bf116d93e9101ab3da81c1335794a9f
SHA256

4fb0ca8b8b260a4626ae9e5ceb82aec0819fe4df8f63dc85af916cde33fdafe7
SHA512

c336299d4a2941361741a7ab2e17739d449c31a471ffbe017f12db19f91d1a0a2ae5b5e3961c967b77597b40328b398c7f0004f92b539d0defa50b2752aefbe5
SSDEEP

768:z6LsoEEeegiZPvEhHSG+gzum/kLyMro2GtOOtEvwDpj/YMLam5appOq0r7p:z6QFElP6n+gKmddpMOtEvwDpj9aYalW

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral1/memory/2304-1-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000b000000013420-11.dat	CryptoLocker_rule2
behavioral1/memory/2304-13-0x0000000002840000-0x0000000002850000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/1404-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/1404-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral1/memory/2304-1-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/files/0x000b000000013420-11.dat	CryptoLocker_set1
behavioral1/memory/2304-13-0x0000000002840000-0x0000000002850000-memory.dmp	CryptoLocker_set1
behavioral1/memory/1404-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/1404-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral1/memory/2304-1-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/files/0x000b000000013420-11.dat	UPX
behavioral1/memory/2304-13-0x0000000002840000-0x0000000002850000-memory.dmp	UPX
behavioral1/memory/1404-16-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/1404-27-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
1404	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
2304	2024-02-22_d1fd0c6ae0c15e653051adee2184b0d5_cryptolocker.exe

UPX packed file 5 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral1/memory/2304-1-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/files/0x000b000000013420-11.dat	upx
behavioral1/memory/2304-13-0x0000000002840000-0x0000000002850000-memory.dmp	upx
behavioral1/memory/1404-16-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/1404-27-0x0000000000500000-0x0000000000510000-memory.dmp	upx

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2304 wrote to memory of 1404	2304	2024-02-22_d1fd0c6ae0c15e653051adee2184b0d5_cryptolocker.exe	28
PID 2304 wrote to memory of 1404	2304	2024-02-22_d1fd0c6ae0c15e653051adee2184b0d5_cryptolocker.exe	28
PID 2304 wrote to memory of 1404	2304	2024-02-22_d1fd0c6ae0c15e653051adee2184b0d5_cryptolocker.exe	28
PID 2304 wrote to memory of 1404	2304	2024-02-22_d1fd0c6ae0c15e653051adee2184b0d5_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-02-22_d1fd0c6ae0c15e653051adee2184b0d5_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-22_d1fd0c6ae0c15e653051adee2184b0d5_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2304
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1404

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

\Users\Admin\AppData\Local\Temp\asih.exe

Filesize
58KB

MD5
24cf07830c85282d622faa1fdc721105

SHA1
4c4ecb957e79eb340ca3a199e3be1d4581c0bd5e

SHA256
eaec04bfacaeb175cab0ed952fe509f246e1c93109ad07312461477a4337203a

SHA512
4b8253e89aa72fb257363eb1ed0f311b5cb021bef994b34090cebd7c84f3bf7435285024c1997e19835c3921c1c68df330898b863ee7de09570b5107b5956f00

Download Submit
memory/1404-16-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1404-18-0x0000000000360000-0x0000000000366000-memory.dmp

Filesize
24KB

Download
memory/1404-19-0x0000000000320000-0x0000000000326000-memory.dmp

Filesize
24KB

Download
memory/1404-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2304-0-0x0000000000440000-0x0000000000446000-memory.dmp

Filesize
24KB

Download
memory/2304-2-0x0000000000480000-0x0000000000486000-memory.dmp

Filesize
24KB

Download
memory/2304-1-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2304-3-0x0000000000440000-0x0000000000446000-memory.dmp

Filesize
24KB

Download
memory/2304-13-0x0000000002840000-0x0000000002850000-memory.dmp

Filesize
64KB

Download
memory/2304-26-0x0000000002840000-0x0000000002850000-memory.dmp

Filesize
64KB

Download