023fe380fbc3bdf1031ebd2a33fd8e60d36431c45bbbaa9ce1dbf9f3fcbd694f

Analysis

max time kernel
150s
max time network
147s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
27-05-2024 02:44

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General

Target

2024-05-27_cf5042c19e5252ff98a1901705db7b5d_cryptolocker.exe
Size

42KB
MD5

cf5042c19e5252ff98a1901705db7b5d
SHA1

7c5883dd18670b8295388411b5e22dd76fe160e1
SHA256

023fe380fbc3bdf1031ebd2a33fd8e60d36431c45bbbaa9ce1dbf9f3fcbd694f
SHA512

a312aaddfab9ab6844f4d14d034313a8530491b2ee29574a4c52561760a1dd974ce234b3671956dc909be7dff773238db89098731685e6ec890a5781577ad086
SSDEEP

384:ba74uGLLQRcsdeQ72ngEr4K7YmE8j6CQYnrz1ZhdaXFXSCVQTLfjDpXqxKHTEXE:ba74zYcgT/EkdCQgpwXFXSqQXfj0xKoU

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/2508-0-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000b00000002341e-13.dat	CryptoLocker_rule2
behavioral2/memory/5108-18-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2508-17-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/5108-27-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/2508-0-0x0000000008000000-0x000000000800F000-memory.dmp	UPX
behavioral2/files/0x000b00000002341e-13.dat	UPX
behavioral2/memory/5108-18-0x0000000008000000-0x000000000800F000-memory.dmp	UPX
behavioral2/memory/2508-17-0x0000000008000000-0x000000000800F000-memory.dmp	UPX
behavioral2/memory/5108-27-0x0000000008000000-0x000000000800F000-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-1-5-21-4018855536-2201274732-320770143-1000\Control Panel\International\Geo\Nation	2024-05-27_cf5042c19e5252ff98a1901705db7b5d_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
5108	hasfj.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2508-0-0x0000000008000000-0x000000000800F000-memory.dmp	upx
behavioral2/files/0x000b00000002341e-13.dat	upx
behavioral2/memory/5108-18-0x0000000008000000-0x000000000800F000-memory.dmp	upx
behavioral2/memory/2508-17-0x0000000008000000-0x000000000800F000-memory.dmp	upx
behavioral2/memory/5108-27-0x0000000008000000-0x000000000800F000-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 2508 wrote to memory of 5108	2508	2024-05-27_cf5042c19e5252ff98a1901705db7b5d_cryptolocker.exe	82
PID 2508 wrote to memory of 5108	2508	2024-05-27_cf5042c19e5252ff98a1901705db7b5d_cryptolocker.exe	82
PID 2508 wrote to memory of 5108	2508	2024-05-27_cf5042c19e5252ff98a1901705db7b5d_cryptolocker.exe	82

C:\Users\Admin\AppData\Local\Temp\2024-05-27_cf5042c19e5252ff98a1901705db7b5d_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-27_cf5042c19e5252ff98a1901705db7b5d_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2508
- C:\Users\Admin\AppData\Local\Temp\hasfj.exe
  "C:\Users\Admin\AppData\Local\Temp\hasfj.exe"
  2⤵
  - Executes dropped EXE
  PID:5108

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\hasfj.exe

Filesize
42KB

MD5
e407ed5a43b61e0009ceef3f72b2ac9f

SHA1
be6f8555994fc02e3612fe920e0d0ade52f17bef

SHA256
c52eee54a141348c5837920900ddc43e8b7722569dbe05d031fc53b1fc2154b4

SHA512
c8aed99ae1c46504c7a39856feff2351198c12e1a6090962622681b1bc723295bf745202f81699883915a380c7d4766500d93c0356ba4950bdbf4ad06124b65e

Download Submit
memory/2508-0-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download
memory/2508-1-0x0000000002D60000-0x0000000002D66000-memory.dmp

Filesize
24KB

Download
memory/2508-2-0x0000000002ED0000-0x0000000002ED6000-memory.dmp

Filesize
24KB

Download
memory/2508-9-0x0000000002D60000-0x0000000002D66000-memory.dmp

Filesize
24KB

Download
memory/2508-17-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download
memory/5108-18-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download
memory/5108-20-0x0000000003010000-0x0000000003016000-memory.dmp

Filesize
24KB

Download
memory/5108-26-0x0000000002010000-0x0000000002016000-memory.dmp

Filesize
24KB

Download
memory/5108-27-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download