39acf9a0dd433ab0a99e4f467629e7c12f4efb2940a99f24dbdd357cfc663519

Analysis

max time kernel
150s
max time network
160s
platform
windows10-2004_x64
resource
win10v2004-20240611-en
resource tags

arch:x64arch:x86image:win10v2004-20240611-enlocale:en-usos:windows10-2004-x64system
submitted
12-06-2024 01:27

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General

Target

2024-06-12_87c09de09d38d8ab7a28efe18bca025a_cryptolocker.exe
Size

25KB
MD5

87c09de09d38d8ab7a28efe18bca025a
SHA1

1df043a56c21b17a4754a89a02a05fb7687bb7b0
SHA256

39acf9a0dd433ab0a99e4f467629e7c12f4efb2940a99f24dbdd357cfc663519
SHA512

82daaa050f0fd4f1b47750ff33a76db6fab821b7836c2c6eff7248db1f2c01ebe7711f994a668e3606648842b856498bdcd8dd6cfdad7b2dcc4333ba1ec4d359
SSDEEP

384:bVCPwFRuFn65arz1ZhdaXFXSCVQTLfjDp6HMJ8:bVCPwFRo6CpwXFXSqQXfjAsJ8

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/1124-0-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x00060000000233d6-13.dat	CryptoLocker_rule2
behavioral2/memory/1124-18-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3664-19-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3664-28-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/1124-0-0x0000000008000000-0x000000000800E000-memory.dmp	UPX
behavioral2/files/0x00060000000233d6-13.dat	UPX
behavioral2/memory/1124-18-0x0000000008000000-0x000000000800E000-memory.dmp	UPX
behavioral2/memory/3664-19-0x0000000008000000-0x000000000800E000-memory.dmp	UPX
behavioral2/memory/3664-28-0x0000000008000000-0x000000000800E000-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-1-5-21-4204450073-1267028356-951339405-1000\Control Panel\International\Geo\Nation	2024-06-12_87c09de09d38d8ab7a28efe18bca025a_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3664	hasfj.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1124-0-0x0000000008000000-0x000000000800E000-memory.dmp	upx
behavioral2/files/0x00060000000233d6-13.dat	upx
behavioral2/memory/1124-18-0x0000000008000000-0x000000000800E000-memory.dmp	upx
behavioral2/memory/3664-19-0x0000000008000000-0x000000000800E000-memory.dmp	upx
behavioral2/memory/3664-28-0x0000000008000000-0x000000000800E000-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 1124 wrote to memory of 3664	1124	2024-06-12_87c09de09d38d8ab7a28efe18bca025a_cryptolocker.exe	79
PID 1124 wrote to memory of 3664	1124	2024-06-12_87c09de09d38d8ab7a28efe18bca025a_cryptolocker.exe	79
PID 1124 wrote to memory of 3664	1124	2024-06-12_87c09de09d38d8ab7a28efe18bca025a_cryptolocker.exe	79

C:\Users\Admin\AppData\Local\Temp\2024-06-12_87c09de09d38d8ab7a28efe18bca025a_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-12_87c09de09d38d8ab7a28efe18bca025a_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1124
- C:\Users\Admin\AppData\Local\Temp\hasfj.exe
  "C:\Users\Admin\AppData\Local\Temp\hasfj.exe"
  2⤵
  - Executes dropped EXE
  PID:3664

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
25KB

MD5
18d4fd15d810fddb2b0e35307b834515

SHA1
cca5ac06ac36db6e35e95ae97ecb723736d7ddca

SHA256
a3c69d93a5baa1f9c8b9d0f33686079a41c84b0dee15787911f9cd9689fc5a3c

SHA512
7870bc1168f0ae973385e8afad8a56b37edf690e403c5ae04dd1a385973c49a6ebeed1d7d4583183132391d6e56bd4bb3ae82b85b55c675fe00588687056c47e

Download Submit
memory/1124-0-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download
memory/1124-1-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

Filesize
24KB

Download
memory/1124-2-0x0000000003150000-0x0000000003156000-memory.dmp

Filesize
24KB

Download
memory/1124-9-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

Filesize
24KB

Download
memory/1124-18-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download
memory/3664-19-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download
memory/3664-21-0x0000000003010000-0x0000000003016000-memory.dmp

Filesize
24KB

Download
memory/3664-27-0x0000000002110000-0x0000000002116000-memory.dmp

Filesize
24KB

Download
memory/3664-28-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download