5ee00381e7ceebdcec11f8195e9ccfb808e985aac23dbf6732e11513f7712bf7

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
27/01/2024, 12:35

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General

Target

2024-01-27_cef385b75a2eb489efc474b08a0ee799_cryptolocker.exe
Size

108KB
MD5

cef385b75a2eb489efc474b08a0ee799
SHA1

f75a457796a350e292b548cb5c8e9e361e9bada2
SHA256

5ee00381e7ceebdcec11f8195e9ccfb808e985aac23dbf6732e11513f7712bf7
SHA512

e278c226d05f4663a4fb22383a2305ea4a87facdf465f69a629d9f58e32cc01956ef2252236f88dd230aadc35a1176a00a6d143ba494c2d77462ac7a5fcaaca0
SSDEEP

1536:z6QFElP6n+gKmddpMOtEvwDpj3GYQbN/PKwMg66:z6a+CdOOtEvwDpjczF

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/3756-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000c00000002316a-13.dat	CryptoLocker_rule2
behavioral2/memory/3756-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1572-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1572-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral2/memory/3756-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000c00000002316a-13.dat	CryptoLocker_set1
behavioral2/memory/3756-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1572-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1572-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/3756-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000c00000002316a-13.dat	UPX
behavioral2/memory/3756-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/1572-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/1572-27-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

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-1-5-21-1497073144-2389943819-3385106915-1000\Control Panel\International\Geo\Nation	2024-01-27_cef385b75a2eb489efc474b08a0ee799_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1572	asih.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3756-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x000c00000002316a-13.dat	upx
behavioral2/memory/3756-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/1572-18-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/1572-27-0x0000000000500000-0x0000000000510000-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 3 IoCs

description	pid	Process	procid_target
PID 3756 wrote to memory of 1572	3756	2024-01-27_cef385b75a2eb489efc474b08a0ee799_cryptolocker.exe	86
PID 3756 wrote to memory of 1572	3756	2024-01-27_cef385b75a2eb489efc474b08a0ee799_cryptolocker.exe	86
PID 3756 wrote to memory of 1572	3756	2024-01-27_cef385b75a2eb489efc474b08a0ee799_cryptolocker.exe	86

C:\Users\Admin\AppData\Local\Temp\2024-01-27_cef385b75a2eb489efc474b08a0ee799_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-01-27_cef385b75a2eb489efc474b08a0ee799_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3756
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1572

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
108KB

MD5
4614f49bbea8fc39dff059c30bc53a4a

SHA1
4bda572fedecc149ad822d43de4a6a18094abcb9

SHA256
3c511f1514ec1a2418138b1081a37978f85539c0ab9b479ffbe13b9469ac85a8

SHA512
2881d33cba40564d1d71218a243282a05341d305c90a91e141ac581799e7d98c8dead9b6020969310f12973ad5334457a1bf4106235988939f1ea67f45629ae1

Download Submit
memory/1572-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1572-20-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/1572-26-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/1572-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3756-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3756-1-0x0000000000520000-0x0000000000526000-memory.dmp

Filesize
24KB

Download
memory/3756-2-0x0000000000520000-0x0000000000526000-memory.dmp

Filesize
24KB

Download
memory/3756-3-0x00000000021B0000-0x00000000021B6000-memory.dmp

Filesize
24KB

Download
memory/3756-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download