d3e2d9b77dad8d5d6c2c6894212a7d62cd5e2bb0dcea3d7fbc0531fa43ffef94

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
04/06/2024, 11:59

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General

Target

2024-06-04_f3eea9f79af965e08d4f03f71cee8675_cryptolocker.exe
Size

76KB
MD5

f3eea9f79af965e08d4f03f71cee8675
SHA1

8865cd5ecf90aa632738f799fc61d476cf622b09
SHA256

d3e2d9b77dad8d5d6c2c6894212a7d62cd5e2bb0dcea3d7fbc0531fa43ffef94
SHA512

22416200237a80fc82c11ccf247f734eeaf449625c8bd9935b3ac0a76e50e0dc4aa8124aa37a52ae286f401a4c6673793b5abe0ec1c6912965967e624abefe68
SSDEEP

1536:P8mnK6QFElP6n+gymddpMOtEvwDpjIHsal81GW:1nK6a+qdOOtEvwDpjX

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/4672-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0007000000023288-13.dat	CryptoLocker_rule2
behavioral2/memory/4308-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4672-19-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4308-27-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral2/memory/4672-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0007000000023288-13.dat	CryptoLocker_set1
behavioral2/memory/4308-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/memory/4672-19-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/memory/4308-27-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/4672-0-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/files/0x0007000000023288-13.dat	UPX
behavioral2/memory/4308-17-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/memory/4672-19-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/memory/4308-27-0x0000000000500000-0x000000000050F311-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-1-5-21-3906287020-2915474608-1755617787-1000\Control Panel\International\Geo\Nation	2024-06-04_f3eea9f79af965e08d4f03f71cee8675_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4308	asih.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4672-0-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/files/0x0007000000023288-13.dat	upx
behavioral2/memory/4308-17-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/memory/4672-19-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/memory/4308-27-0x0000000000500000-0x000000000050F311-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 4672 wrote to memory of 4308	4672	2024-06-04_f3eea9f79af965e08d4f03f71cee8675_cryptolocker.exe	81
PID 4672 wrote to memory of 4308	4672	2024-06-04_f3eea9f79af965e08d4f03f71cee8675_cryptolocker.exe	81
PID 4672 wrote to memory of 4308	4672	2024-06-04_f3eea9f79af965e08d4f03f71cee8675_cryptolocker.exe	81

C:\Users\Admin\AppData\Local\Temp\2024-06-04_f3eea9f79af965e08d4f03f71cee8675_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-04_f3eea9f79af965e08d4f03f71cee8675_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4672
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4308

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
76KB

MD5
b2395b207f6a6f3b2cc112a29a27fa47

SHA1
f274fcddf8b1a9ade7d298ccc78e0c7f5383d275

SHA256
8789c9a4d412ffcaa6b89a29787f2bab999370fce4a05d6973a3129bec1ebefb

SHA512
d180843b17ec855d6564875133666e398710776ff13680d7af7fa0a081a92f4c0d29c7104f69d3ed55479d2e2907c19edf536d11f761f4d25d4222bebb915c6d

Download Submit
memory/4308-17-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/4308-20-0x00000000020F0000-0x00000000020F6000-memory.dmp

Filesize
24KB

Download
memory/4308-26-0x00000000006B0000-0x00000000006B6000-memory.dmp

Filesize
24KB

Download
memory/4308-27-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/4672-0-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/4672-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/4672-2-0x0000000000750000-0x0000000000756000-memory.dmp

Filesize
24KB

Download
memory/4672-9-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/4672-19-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download