d2e3c6919b368b87382e525ebd5da7796b272b91d326a44848522fefe015be7c

Analysis

max time kernel
149s
max time network
156s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
30/05/2024, 04:17

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General

Target

2024-05-30_b04021a4f695e7b19afc62d681b671c4_cryptolocker.exe
Size

54KB
MD5

b04021a4f695e7b19afc62d681b671c4
SHA1

86788e2cee871f9ae98de6c0b12e1c4103185616
SHA256

d2e3c6919b368b87382e525ebd5da7796b272b91d326a44848522fefe015be7c
SHA512

e9eb875d6ebd3678cfae07dd8186f1fde591a998867a57c09164f194fa395ecbef5fc2255667e913d3734e899ace3aa8fb5703da3c74d559ad08a0380c0e1797
SSDEEP

768:z6LsoEEeegiZPvEhHSG+gzum/kLyMro2GtOOtEvwDpj/YY1J+OTOka4:z6QFElP6n+gKmddpMOtEvwDpj31ikv

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral1/memory/2108-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000a00000001466c-11.dat	CryptoLocker_rule2
behavioral1/memory/2108-14-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/1732-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/1732-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral1/memory/2108-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/files/0x000a00000001466c-11.dat	CryptoLocker_set1
behavioral1/memory/2108-14-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/1732-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/1732-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral1/memory/2108-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/files/0x000a00000001466c-11.dat	UPX
behavioral1/memory/2108-14-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/1732-16-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/1732-26-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
1732	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
2108	2024-05-30_b04021a4f695e7b19afc62d681b671c4_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2108-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/files/0x000a00000001466c-11.dat	upx
behavioral1/memory/2108-14-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/1732-16-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/1732-26-0x0000000000500000-0x0000000000510000-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 2108 wrote to memory of 1732	2108	2024-05-30_b04021a4f695e7b19afc62d681b671c4_cryptolocker.exe	28
PID 2108 wrote to memory of 1732	2108	2024-05-30_b04021a4f695e7b19afc62d681b671c4_cryptolocker.exe	28
PID 2108 wrote to memory of 1732	2108	2024-05-30_b04021a4f695e7b19afc62d681b671c4_cryptolocker.exe	28
PID 2108 wrote to memory of 1732	2108	2024-05-30_b04021a4f695e7b19afc62d681b671c4_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-05-30_b04021a4f695e7b19afc62d681b671c4_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-30_b04021a4f695e7b19afc62d681b671c4_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2108
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1732

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
55KB

MD5
37ab9feece510d9e26de92e241c89fd3

SHA1
6b82e207c2dd50d22f0589c9a13bab7b8793ef8a

SHA256
d0ada2d5aa94ea2c4e62333e0a095801c1a7d70fe2af431ed4528111456f40a9

SHA512
e3c64b81029ef3f08d61185d141443550ea7dfcfc268c625fc63e3b4fe013a37ac4e8980956db44072a6d2d61c70155770ffe735d8d575e85d8b8769bfaf1af9

Download Submit
memory/1732-16-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1732-19-0x00000000002B0000-0x00000000002B6000-memory.dmp

Filesize
24KB

Download
memory/1732-18-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/1732-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2108-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2108-1-0x0000000000430000-0x0000000000436000-memory.dmp

Filesize
24KB

Download
memory/2108-9-0x0000000000430000-0x0000000000436000-memory.dmp

Filesize
24KB

Download
memory/2108-2-0x0000000000460000-0x0000000000466000-memory.dmp

Filesize
24KB

Download
memory/2108-14-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download