e99821840edb6b74f3b40b4d873d6a32c0c690215b9717532dc04f4efb1a649d

Analysis

max time kernel
138s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
18-02-2024 07:52

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General

Target

2024-02-18_f0644d06f1513b9be119eebb431a50e2_cryptolocker.exe
Size

63KB
MD5

f0644d06f1513b9be119eebb431a50e2
SHA1

7b62b61e9e9ce9473ff5dc12970944d9d9b21fa3
SHA256

e99821840edb6b74f3b40b4d873d6a32c0c690215b9717532dc04f4efb1a649d
SHA512

0a2b8029084a7418233dfaf66ded89d2b74b2de3b3e64dbe6c179aa0667e8e78f8258a47786bcdd61f0b61e605beb8320589e5dad179348efb4d88e145ec205e
SSDEEP

1536:P8mnK6QFElP6n+gymddpMOtEvwDpjYhP+y:1nK6a+qdOOtEvwDpj0

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/4884-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0007000000023127-13.dat	CryptoLocker_rule2
behavioral2/memory/4884-18-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4720-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/4884-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0007000000023127-13.dat	CryptoLocker_set1
behavioral2/memory/4884-18-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/memory/4720-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/4884-0-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/files/0x0007000000023127-13.dat	UPX
behavioral2/memory/4884-18-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/memory/4720-26-0x0000000000500000-0x000000000050F311-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-1-5-21-3073191680-435865314-2862784915-1000\Control Panel\International\Geo\Nation	2024-02-18_f0644d06f1513b9be119eebb431a50e2_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4720	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4884-0-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/files/0x0007000000023127-13.dat	upx
behavioral2/memory/4884-18-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/memory/4720-26-0x0000000000500000-0x000000000050F311-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 4884 wrote to memory of 4720	4884	2024-02-18_f0644d06f1513b9be119eebb431a50e2_cryptolocker.exe	83
PID 4884 wrote to memory of 4720	4884	2024-02-18_f0644d06f1513b9be119eebb431a50e2_cryptolocker.exe	83
PID 4884 wrote to memory of 4720	4884	2024-02-18_f0644d06f1513b9be119eebb431a50e2_cryptolocker.exe	83

C:\Users\Admin\AppData\Local\Temp\2024-02-18_f0644d06f1513b9be119eebb431a50e2_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-18_f0644d06f1513b9be119eebb431a50e2_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4884
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4720

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
63KB

MD5
85f5dff6c211eb5cd6df8df2168dbfd6

SHA1
6cd544b9c7fb73ff3ed35aa8a15a2f90657f2238

SHA256
a2435eec43ae6bfad3e8a338fcc954edd4cac28646393dbfb170f541f68c78d9

SHA512
f0f4282d222d715ab5f9d041d9fddf6e2ab821a4d3e465ede01c78391687d362b114231d4bb3f752d9ba4bcce150acefd5df758a7ed8e88274eb95925c047ce4

Download Submit
memory/4720-19-0x0000000002070000-0x0000000002076000-memory.dmp

Filesize
24KB

Download
memory/4720-20-0x0000000002050000-0x0000000002056000-memory.dmp

Filesize
24KB

Download
memory/4720-26-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/4884-0-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/4884-1-0x0000000000520000-0x0000000000526000-memory.dmp

Filesize
24KB

Download
memory/4884-2-0x0000000000520000-0x0000000000526000-memory.dmp

Filesize
24KB

Download
memory/4884-3-0x00000000021B0000-0x00000000021B6000-memory.dmp

Filesize
24KB

Download
memory/4884-18-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download