c5106c1af374abfaddc597dd5951bb3f5514e3f9b671b4cd90b4107abe89f1a8

Analysis

max time kernel
149s
max time network
155s
platform
windows10-2004_x64
resource
win10v2004-20240221-en
resource tags

arch:x64arch:x86image:win10v2004-20240221-enlocale:en-usos:windows10-2004-x64system
submitted
22/02/2024, 17:32

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General

Target

2024-02-22_437abfb34b9ba49b0a999262bd23bf24_cryptolocker.exe
Size

126KB
MD5

437abfb34b9ba49b0a999262bd23bf24
SHA1

9f6a0dd0cd94a74740895fc63a5ebcef887d3a86
SHA256

c5106c1af374abfaddc597dd5951bb3f5514e3f9b671b4cd90b4107abe89f1a8
SHA512

fed5120a7c41298e1b60eb51d49e00db75bc9a69202689f1f873efaefac49f21fb9a294100eb9fa89edf40e1e4d5c24ba54048ad9d5678529ae4a6773de5029a
SSDEEP

1536:qkmnpomddpMOtEvwDpjJGYQbN/PKwNgp699GNtL1eIEW:AnBdOOtEvwDpj6zk

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/4464-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000700000002321a-13.dat	CryptoLocker_rule2
behavioral2/memory/4464-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4580-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/4464-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000700000002321a-13.dat	CryptoLocker_set1
behavioral2/memory/4464-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4580-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/4464-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/files/0x000700000002321a-13.dat	UPX
behavioral2/memory/4464-17-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/4580-26-0x0000000000500000-0x000000000050F000-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-1-5-21-2828415587-3732861812-1919322417-1000\Control Panel\International\Geo\Nation	2024-02-22_437abfb34b9ba49b0a999262bd23bf24_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4580	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4464-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/files/0x000700000002321a-13.dat	upx
behavioral2/memory/4464-17-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/4580-26-0x0000000000500000-0x000000000050F000-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 4464 wrote to memory of 4580	4464	2024-02-22_437abfb34b9ba49b0a999262bd23bf24_cryptolocker.exe	92
PID 4464 wrote to memory of 4580	4464	2024-02-22_437abfb34b9ba49b0a999262bd23bf24_cryptolocker.exe	92
PID 4464 wrote to memory of 4580	4464	2024-02-22_437abfb34b9ba49b0a999262bd23bf24_cryptolocker.exe	92

C:\Users\Admin\AppData\Local\Temp\2024-02-22_437abfb34b9ba49b0a999262bd23bf24_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-22_437abfb34b9ba49b0a999262bd23bf24_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4464
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4580

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
126KB

MD5
62b1460c810c7e1ba22122971cf58bb2

SHA1
19c8a6285aa612cc0b8e87ecec985a69472c44c1

SHA256
b43f9c772ca6f4dad4e41cffb6bb282a56cbeacd76627e5ef813f21d95fcafa0

SHA512
16f27e761ddf547edc84a88261f24c928cd6cc12df3b8c0753c7a24d562d67f3553e26b2e562e96176df7320c660a9954f3acbcd28927af3568df0e6b2e11c76

Download Submit
memory/4464-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/4464-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/4464-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/4464-3-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/4464-17-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/4580-19-0x00000000007D0000-0x00000000007D6000-memory.dmp

Filesize
24KB

Download
memory/4580-21-0x00000000007B0000-0x00000000007B6000-memory.dmp

Filesize
24KB

Download
memory/4580-26-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download