a7721a12af977f1ac27b8b4e647d76f8d28b7023960a054ba9cc1fe2c7365138

Analysis

max time kernel
148s
max time network
152s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
20/02/2024, 08:35

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General

Target

2024-02-20_b964898894760835e59b6b4cdceef8b8_cryptolocker.exe
Size

126KB
MD5

b964898894760835e59b6b4cdceef8b8
SHA1

2fb16a5b28835e1a780de74f938cdb5c981098ce
SHA256

a7721a12af977f1ac27b8b4e647d76f8d28b7023960a054ba9cc1fe2c7365138
SHA512

1415fcb8e41b0cd60922b37813ea1bdeac100b83442ba7ee798c42ace1f0829c373098addac03965c3241ae63d8f083827662d6b5078c1e269f86418a31f9c5d
SSDEEP

1536:qkmnpomddpMOtEvwDpjJGYQbN/PKwNgp699GNtL1eTb:AnBdOOtEvwDpj6zt

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral1/memory/1876-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000e000000012247-11.dat	CryptoLocker_rule2
behavioral1/memory/2560-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/1876-14-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2560-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral1/memory/1876-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/files/0x000e000000012247-11.dat	CryptoLocker_set1
behavioral1/memory/2560-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/memory/1876-14-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2560-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral1/memory/1876-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral1/files/0x000e000000012247-11.dat	UPX
behavioral1/memory/2560-17-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral1/memory/1876-14-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral1/memory/2560-26-0x0000000000500000-0x000000000050F000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2560	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
1876	2024-02-20_b964898894760835e59b6b4cdceef8b8_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/1876-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral1/files/0x000e000000012247-11.dat	upx
behavioral1/memory/2560-17-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral1/memory/1876-14-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral1/memory/2560-26-0x0000000000500000-0x000000000050F000-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 4 IoCs

description	pid	Process	procid_target
PID 1876 wrote to memory of 2560	1876	2024-02-20_b964898894760835e59b6b4cdceef8b8_cryptolocker.exe	28
PID 1876 wrote to memory of 2560	1876	2024-02-20_b964898894760835e59b6b4cdceef8b8_cryptolocker.exe	28
PID 1876 wrote to memory of 2560	1876	2024-02-20_b964898894760835e59b6b4cdceef8b8_cryptolocker.exe	28
PID 1876 wrote to memory of 2560	1876	2024-02-20_b964898894760835e59b6b4cdceef8b8_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-02-20_b964898894760835e59b6b4cdceef8b8_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-20_b964898894760835e59b6b4cdceef8b8_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1876
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2560

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

\Users\Admin\AppData\Local\Temp\asih.exe

Filesize
126KB

MD5
4882fc512ab2aa93bb695449ca75fdf7

SHA1
967b4fd905325f9a8635721f55cebd00256b4f06

SHA256
f250a12f540537e02b2ac4ee937ae8ac2f21ffaca30a56fca294f0d3f1fa3eb9

SHA512
eb0778887d16b3b43cf10d57588bf97691afc2ccc814ae7745ca55ef25d23405703c3996e6f76ed7a20a69303c590d50d671007fcc17999e9db1c892f1cd3c7f

Download Submit
memory/1876-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/1876-1-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/1876-3-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/1876-2-0x0000000000270000-0x0000000000276000-memory.dmp

Filesize
24KB

Download
memory/1876-14-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2560-17-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2560-19-0x0000000000300000-0x0000000000306000-memory.dmp

Filesize
24KB

Download
memory/2560-18-0x00000000002C0000-0x00000000002C6000-memory.dmp

Filesize
24KB

Download
memory/2560-26-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download