e28e651d01144e48150d1c554953f736651e95bd404e81bfeef6d771cc28bf61

Analysis

max time kernel
148s
max time network
148s
platform
windows7_x64
resource
win7-20240220-en
resource tags

arch:x64arch:x86image:win7-20240220-enlocale:en-usos:windows7-x64system
submitted
28/05/2024, 16:34

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General

Target

2024-05-28_9915e6984c26c9841dd74e863a2f82d3_cryptolocker.exe
Size

75KB
MD5

9915e6984c26c9841dd74e863a2f82d3
SHA1

d606e1f3684eb1879002d2852eabb4810e44315a
SHA256

e28e651d01144e48150d1c554953f736651e95bd404e81bfeef6d771cc28bf61
SHA512

d0deb863fd0f901f895ca304d6bc32ca617f3af8ea81507f5548e0b899e643bac6fc2ca501e75e8dc71882fecd3737ee9fe174a2c155a7150ec62b96e5295f7b
SSDEEP

1536:P8mnK6QFElP6n+gymddpMOtEvwDpjIHsal81GD:1nK6a+qdOOtEvwDpjS

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral1/memory/2872-1-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000b000000015d59-11.dat	CryptoLocker_rule2
behavioral1/memory/2872-15-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2560-16-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2560-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral1/memory/2872-1-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral1/files/0x000b000000015d59-11.dat	CryptoLocker_set1
behavioral1/memory/2872-15-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral1/memory/2560-16-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral1/memory/2560-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral1/memory/2872-1-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral1/files/0x000b000000015d59-11.dat	UPX
behavioral1/memory/2872-15-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral1/memory/2560-16-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral1/memory/2560-26-0x0000000000500000-0x000000000050F311-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2560	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
2872	2024-05-28_9915e6984c26c9841dd74e863a2f82d3_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2872-1-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral1/files/0x000b000000015d59-11.dat	upx
behavioral1/memory/2872-15-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral1/memory/2560-16-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral1/memory/2560-26-0x0000000000500000-0x000000000050F311-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 4 IoCs

description	pid	Process	procid_target
PID 2872 wrote to memory of 2560	2872	2024-05-28_9915e6984c26c9841dd74e863a2f82d3_cryptolocker.exe	28
PID 2872 wrote to memory of 2560	2872	2024-05-28_9915e6984c26c9841dd74e863a2f82d3_cryptolocker.exe	28
PID 2872 wrote to memory of 2560	2872	2024-05-28_9915e6984c26c9841dd74e863a2f82d3_cryptolocker.exe	28
PID 2872 wrote to memory of 2560	2872	2024-05-28_9915e6984c26c9841dd74e863a2f82d3_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-05-28_9915e6984c26c9841dd74e863a2f82d3_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-28_9915e6984c26c9841dd74e863a2f82d3_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2872
- 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

Replay Monitor

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Downloads

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

Filesize
75KB

MD5
78e12670f9c6ef7b3032060dfc31bb3f

SHA1
d1ec30e859c0690659002b6836145b406894fd65

SHA256
2618bd8e1e422f34c2dfc8d6a1a57a1415e081cff418316c8f3ac6671e1563d4

SHA512
c3cdb936fefb2bf74966b1c6b72c70dbe32ef1f1e1707cf936ae77c00d95afd8f2e05237f32ba8d539b34f2923b78d4a6b3876a71f5d8f82195ff7b48360b033

Download Submit
memory/2560-16-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/2560-18-0x0000000000440000-0x0000000000446000-memory.dmp

Filesize
24KB

Download
memory/2560-19-0x0000000000480000-0x0000000000486000-memory.dmp

Filesize
24KB

Download
memory/2560-26-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/2872-0-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2872-9-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2872-2-0x0000000000280000-0x0000000000286000-memory.dmp

Filesize
24KB

Download
memory/2872-1-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/2872-15-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download