409b75bac91f495d5519e5c4297abb1d64983f5d2435c31e785d44a5f849c2ef

Analysis

max time kernel
148s
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
16/04/2024, 03:38

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General

Target

2024-04-16_3a6775ae226e04b14fe463ce8d29ab3c_cryptolocker.exe
Size

79KB
MD5

3a6775ae226e04b14fe463ce8d29ab3c
SHA1

6299999f9b41546363d2bc6a48efb09fb01cf13b
SHA256

409b75bac91f495d5519e5c4297abb1d64983f5d2435c31e785d44a5f849c2ef
SHA512

b21bb6cb6a5624132b892ae4bad10228eb7412c2557697f15c8e5070b9c693921f3b94415125ff1c5cc9f195ac2e037468b4103ed11dfef72c2c617de49dd54d
SSDEEP

1536:zj+soPSMOtEvwDpj4ktBl01hJ0tq1ky7Qt:zCsanOtEvwDpjZ

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/1744-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x001c00000001e97e-13.dat	CryptoLocker_rule2
behavioral2/memory/1744-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/592-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/1744-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x001c00000001e97e-13.dat	CryptoLocker_set1
behavioral2/memory/1744-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/592-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/1744-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x001c00000001e97e-13.dat	UPX
behavioral2/memory/1744-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/592-26-0x0000000000500000-0x0000000000510000-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-1-5-21-259785868-298165991-4178590326-1000\Control Panel\International\Geo\Nation	2024-04-16_3a6775ae226e04b14fe463ce8d29ab3c_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
592	misid.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1744-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x001c00000001e97e-13.dat	upx
behavioral2/memory/1744-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/592-26-0x0000000000500000-0x0000000000510000-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 1744 wrote to memory of 592	1744	2024-04-16_3a6775ae226e04b14fe463ce8d29ab3c_cryptolocker.exe	85
PID 1744 wrote to memory of 592	1744	2024-04-16_3a6775ae226e04b14fe463ce8d29ab3c_cryptolocker.exe	85
PID 1744 wrote to memory of 592	1744	2024-04-16_3a6775ae226e04b14fe463ce8d29ab3c_cryptolocker.exe	85

C:\Users\Admin\AppData\Local\Temp\2024-04-16_3a6775ae226e04b14fe463ce8d29ab3c_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-16_3a6775ae226e04b14fe463ce8d29ab3c_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1744
- C:\Users\Admin\AppData\Local\Temp\misid.exe
  "C:\Users\Admin\AppData\Local\Temp\misid.exe"
  2⤵
  - Executes dropped EXE
  PID:592

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\misid.exe

Filesize
79KB

MD5
7c539576c3c5842d70c17d0ab2905388

SHA1
78a56cd16acc9c8669ff394c1cf864458d977b7e

SHA256
31eb4e92494071e9e40813ed6aed20900443e7a1eda421da764fa21b02f62708

SHA512
0fa07b0eab2041d6963e4c7fc01a703d180e985a831b4e20de460af256f1f81078168c73773629a5b1d6d29a0ddcdc8c0bf931c7a8efcfd18fc91f05c0600cac

Download Submit
memory/592-19-0x00000000007C0000-0x00000000007C6000-memory.dmp

Filesize
24KB

Download
memory/592-21-0x0000000000690000-0x0000000000696000-memory.dmp

Filesize
24KB

Download
memory/592-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1744-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1744-1-0x0000000000510000-0x0000000000516000-memory.dmp

Filesize
24KB

Download
memory/1744-2-0x0000000000510000-0x0000000000516000-memory.dmp

Filesize
24KB

Download
memory/1744-3-0x0000000000530000-0x0000000000536000-memory.dmp

Filesize
24KB

Download
memory/1744-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download