fbfbb5173d38301f1edd50680255ebcbbb7572a86ea2a35b01dd8dcab4006fd9

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
10/04/2024, 04:44

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General

Target

2024-04-10_7ea681bc28b84c6a527fd91eb065f920_cryptolocker.exe
Size

87KB
MD5

7ea681bc28b84c6a527fd91eb065f920
SHA1

b70a6f628999d1a560246d0b1955045a6b3a6fdf
SHA256

fbfbb5173d38301f1edd50680255ebcbbb7572a86ea2a35b01dd8dcab4006fd9
SHA512

374919dd4dc0b8381950d2a03a3ae69c1fa9209bd8fe856e9cb502fe428451b4daf44a6376668516882ed0edd41fddc871daafa6868fb4bdc7030f298a09d731
SSDEEP

1536:qkmnpomddpMOtEvwDpjJGYQbN/PKwMg7vS:AnBdOOtEvwDpj6zC

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/4784-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0008000000023206-13.dat	CryptoLocker_rule2
behavioral2/memory/4784-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4760-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/4784-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0008000000023206-13.dat	CryptoLocker_set1
behavioral2/memory/4784-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4760-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/4784-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/files/0x0008000000023206-13.dat	UPX
behavioral2/memory/4784-17-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/4760-26-0x0000000000500000-0x000000000050F000-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-1-5-21-399997616-3400990511-967324271-1000\Control Panel\International\Geo\Nation	2024-04-10_7ea681bc28b84c6a527fd91eb065f920_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4760	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4784-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/files/0x0008000000023206-13.dat	upx
behavioral2/memory/4784-17-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/4760-26-0x0000000000500000-0x000000000050F000-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 4784 wrote to memory of 4760	4784	2024-04-10_7ea681bc28b84c6a527fd91eb065f920_cryptolocker.exe	86
PID 4784 wrote to memory of 4760	4784	2024-04-10_7ea681bc28b84c6a527fd91eb065f920_cryptolocker.exe	86
PID 4784 wrote to memory of 4760	4784	2024-04-10_7ea681bc28b84c6a527fd91eb065f920_cryptolocker.exe	86

C:\Users\Admin\AppData\Local\Temp\2024-04-10_7ea681bc28b84c6a527fd91eb065f920_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-10_7ea681bc28b84c6a527fd91eb065f920_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4784
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4760

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
88KB

MD5
8627351738f6b4fb848afe7ad375ea0e

SHA1
df70b928562bfc44513169bcd305818f218abe29

SHA256
e08965c8d5f18e0e42b40a96626c27856019d48720a02c51e1da3c49794467b9

SHA512
bd1b0b50d8b439e426b26d1561450104d03f0f9d0d46bd777f858aeed37e299f541534229c35e5aba090a07c1967f4607c196bf1b9a03059f9bc9e80ce55f777

Download Submit
memory/4760-19-0x0000000002000000-0x0000000002006000-memory.dmp

Filesize
24KB

Download
memory/4760-21-0x0000000000560000-0x0000000000566000-memory.dmp

Filesize
24KB

Download
memory/4760-26-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/4784-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/4784-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/4784-2-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/4784-3-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download
memory/4784-17-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download