d5b052691ff85e28dbd060e86b1aa5d35046c386ac120c22d9735e042babaced

Analysis

max time kernel
150s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240419-en
resource tags

arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
submitted
27-04-2024 02:29

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General

Target

2024-04-27_c9591ec311f685c867ede5a01ff64bbc_cryptolocker.exe
Size

31KB
MD5

c9591ec311f685c867ede5a01ff64bbc
SHA1

85095dae698f0c7650f8f2513ca3581cfc02e4fc
SHA256

d5b052691ff85e28dbd060e86b1aa5d35046c386ac120c22d9735e042babaced
SHA512

3453b64fec647119834383f1961d698559d1b43ce03900d28bcf03212002cd6e6052b331c53e62b1c24432408f3da07cc2a644febf90ee6a788d176a0528ab77
SSDEEP

384:bG74uGLLQRcsdeQ72ngEr4K7YmE8j60nrlwfjDUGTGo:bG74zYcgT/Ekd0ryfj5

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/996-0-0x0000000008000000-0x000000000800A000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000c000000023b7f-13.dat	CryptoLocker_rule2
behavioral2/memory/996-16-0x0000000008000000-0x000000000800A000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3752-17-0x0000000008000000-0x000000000800A000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3752-27-0x0000000008000000-0x000000000800A000-memory.dmp	CryptoLocker_rule2

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-1-5-21-2860750803-256193626-1801997576-1000\Control Panel\International\Geo\Nation	2024-04-27_c9591ec311f685c867ede5a01ff64bbc_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3752	hasfj.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 996 wrote to memory of 3752	996	2024-04-27_c9591ec311f685c867ede5a01ff64bbc_cryptolocker.exe	83
PID 996 wrote to memory of 3752	996	2024-04-27_c9591ec311f685c867ede5a01ff64bbc_cryptolocker.exe	83
PID 996 wrote to memory of 3752	996	2024-04-27_c9591ec311f685c867ede5a01ff64bbc_cryptolocker.exe	83

C:\Users\Admin\AppData\Local\Temp\2024-04-27_c9591ec311f685c867ede5a01ff64bbc_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-27_c9591ec311f685c867ede5a01ff64bbc_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:996
- C:\Users\Admin\AppData\Local\Temp\hasfj.exe
  "C:\Users\Admin\AppData\Local\Temp\hasfj.exe"
  2⤵
  - Executes dropped EXE
  PID:3752

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
31KB

MD5
c1198a6d02394ece6715fdfb3461f042

SHA1
4f8cea12b166ff31c69ec3e1d746ffdf1e6f6314

SHA256
6f740912424f441604ad72029c74367544b8603849aed4999b98f1f42d9e9c25

SHA512
39ae1e7e268c4e95f4a20d5842e3f1aed4191bdb12313f6ea096d64ad0c4a33c3c82bfe6d0e0b015a19d4059d3f230b4e6422dc0386f411dc482c64e051ca771

Download Submit
memory/996-0-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download
memory/996-1-0x0000000002120000-0x0000000002126000-memory.dmp

Filesize
24KB

Download
memory/996-2-0x0000000002190000-0x0000000002196000-memory.dmp

Filesize
24KB

Download
memory/996-9-0x0000000002120000-0x0000000002126000-memory.dmp

Filesize
24KB

Download
memory/996-16-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download
memory/3752-17-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download
memory/3752-20-0x00000000022C0000-0x00000000022C6000-memory.dmp

Filesize
24KB

Download
memory/3752-26-0x00000000006F0000-0x00000000006F6000-memory.dmp

Filesize
24KB

Download
memory/3752-27-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download