42af1b37b3c55e141f337259bd8b4f5530760d27da063ca19629d35c31cfce96

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
27/02/2024, 16:02

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General

Target

2024-02-27_d769580a4338522f3d5cf295cd86c5f8_cryptolocker.exe
Size

72KB
MD5

d769580a4338522f3d5cf295cd86c5f8
SHA1

f3dfe31affc476e7ee9e52b656b26a3be324f51e
SHA256

42af1b37b3c55e141f337259bd8b4f5530760d27da063ca19629d35c31cfce96
SHA512

89bcb3d90255a3ce57a820d04248ae549ba39c490eedbc8389a5a05039cae065fef56a7e0f949d30b3323e71b792743c3cec12b80914010ad0438647b8f77fa8
SSDEEP

1536:P8mnK6QFElP6n+gymddpMOtEvwDpjIHsal8s:1nK6a+qdOOtEvwDpjC

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/6036-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000700000001ebc7-13.dat	CryptoLocker_rule2
behavioral2/memory/6036-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3036-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/6036-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000700000001ebc7-13.dat	CryptoLocker_set1
behavioral2/memory/6036-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/memory/3036-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/6036-0-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/files/0x000700000001ebc7-13.dat	UPX
behavioral2/memory/6036-17-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/memory/3036-26-0x0000000000500000-0x000000000050F311-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-1-5-21-566096764-1992588923-1249862864-1000\Control Panel\International\Geo\Nation	2024-02-27_d769580a4338522f3d5cf295cd86c5f8_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3036	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/6036-0-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/files/0x000700000001ebc7-13.dat	upx
behavioral2/memory/6036-17-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/memory/3036-26-0x0000000000500000-0x000000000050F311-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 6036 wrote to memory of 3036	6036	2024-02-27_d769580a4338522f3d5cf295cd86c5f8_cryptolocker.exe	89
PID 6036 wrote to memory of 3036	6036	2024-02-27_d769580a4338522f3d5cf295cd86c5f8_cryptolocker.exe	89
PID 6036 wrote to memory of 3036	6036	2024-02-27_d769580a4338522f3d5cf295cd86c5f8_cryptolocker.exe	89

C:\Users\Admin\AppData\Local\Temp\2024-02-27_d769580a4338522f3d5cf295cd86c5f8_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-27_d769580a4338522f3d5cf295cd86c5f8_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:6036
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3036

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
72KB

MD5
f82b6fc4d870de99937de90ec1294935

SHA1
703cb56a5b9de00c297b57b87ff1210982e15b0d

SHA256
50db5bae1bdcd29ea501b57bf208e6446c78c937c85566ddfee5b6af37541e2a

SHA512
28d6a4f464483e2cf6cafaaf39eb1d422737baffdff3fb0b73a6b511a12968734a8d9304ec553fc96740fc09e6d77a860cc9c6ede1b0725576d8384f2cd14561

Download Submit
memory/3036-19-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/3036-23-0x00000000004C0000-0x00000000004C6000-memory.dmp

Filesize
24KB

Download
memory/3036-26-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/6036-0-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/6036-1-0x00000000006E0000-0x00000000006E6000-memory.dmp

Filesize
24KB

Download
memory/6036-2-0x00000000006E0000-0x00000000006E6000-memory.dmp

Filesize
24KB

Download
memory/6036-3-0x0000000000890000-0x0000000000896000-memory.dmp

Filesize
24KB

Download
memory/6036-17-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download