e6b3fdf445f594038dc27ef1110d14e5753ecb1dd071d821a28bc24e41ae313c

Analysis

max time kernel
150s
max time network
146s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
11-05-2024 13:56

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General

Target

2024-05-11_7cf8d8aab0eada5d7f60d7ab3dabfbe5_cryptolocker.exe
Size

40KB
MD5

7cf8d8aab0eada5d7f60d7ab3dabfbe5
SHA1

03ff34e4144a5d18cf2061eaffbea28fd6a575e5
SHA256

e6b3fdf445f594038dc27ef1110d14e5753ecb1dd071d821a28bc24e41ae313c
SHA512

abd3dfbf39639443090bea7043d22c7b5f51b0bd00043c21f436dbbc1ab5f8d7ebfb422dd5d15a950cf3bb634c883bbc3a840e102c9aae4c35a1734a41a79074
SSDEEP

384:ba74uGLLQRcsdeQ72ngEr4K7YmE8j6CQYnrz1ZhdaXFXSCVQTLfjDpXqxKHB0:ba74zYcgT/EkdCQgpwXFXSqQXfj0xKu

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/4404-0-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000500000002326f-13.dat	CryptoLocker_rule2
behavioral2/memory/4404-17-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4216-25-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/4404-0-0x0000000008000000-0x000000000800F000-memory.dmp	UPX
behavioral2/files/0x000500000002326f-13.dat	UPX
behavioral2/memory/4404-17-0x0000000008000000-0x000000000800F000-memory.dmp	UPX
behavioral2/memory/4216-25-0x0000000008000000-0x000000000800F000-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-1-5-21-2539840389-1261165778-1087677076-1000\Control Panel\International\Geo\Nation	2024-05-11_7cf8d8aab0eada5d7f60d7ab3dabfbe5_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4216	hasfj.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4404-0-0x0000000008000000-0x000000000800F000-memory.dmp	upx
behavioral2/files/0x000500000002326f-13.dat	upx
behavioral2/memory/4404-17-0x0000000008000000-0x000000000800F000-memory.dmp	upx
behavioral2/memory/4216-25-0x0000000008000000-0x000000000800F000-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 4404 wrote to memory of 4216	4404	2024-05-11_7cf8d8aab0eada5d7f60d7ab3dabfbe5_cryptolocker.exe	80
PID 4404 wrote to memory of 4216	4404	2024-05-11_7cf8d8aab0eada5d7f60d7ab3dabfbe5_cryptolocker.exe	80
PID 4404 wrote to memory of 4216	4404	2024-05-11_7cf8d8aab0eada5d7f60d7ab3dabfbe5_cryptolocker.exe	80

C:\Users\Admin\AppData\Local\Temp\2024-05-11_7cf8d8aab0eada5d7f60d7ab3dabfbe5_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-11_7cf8d8aab0eada5d7f60d7ab3dabfbe5_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4404
- C:\Users\Admin\AppData\Local\Temp\hasfj.exe
  "C:\Users\Admin\AppData\Local\Temp\hasfj.exe"
  2⤵
  - Executes dropped EXE
  PID:4216

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\hasfj.exe

Filesize
41KB

MD5
b2fb5e7dd067148ca6f0303531b4f14c

SHA1
5296a3591e1e030ebdd702bdf3efedf3626eda26

SHA256
e1aa72a220953e1b51d70477e8f2cf330a6784a9292c26fe32f365c6b13dd68f

SHA512
9766a07587986c0c0d9a2b344fc47e00c8063207f35804eb26cf44ecd612fc6ff6ad9abf95bc092727a49fcb49426abc895b0f253509c810690121c4e80a0352

Download Submit
memory/4216-25-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download
memory/4404-0-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download
memory/4404-1-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

Filesize
24KB

Download
memory/4404-2-0x0000000003150000-0x0000000003156000-memory.dmp

Filesize
24KB

Download
memory/4404-9-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

Filesize
24KB

Download
memory/4404-17-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download