1de60767887bf2cfb8b7fd15dcd2bac1a2987ad59addc9928741ae18530c7118

Analysis

max time kernel
148s
max time network
149s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
12-02-2024 19:55

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General

Target

2024-02-12_408dc5a06a7715efa519623f054bd2e5_cryptolocker.exe
Size

148KB
MD5

408dc5a06a7715efa519623f054bd2e5
SHA1

d48abca6063ae3ff2693e5e3778c96ba0cd1c4f3
SHA256

1de60767887bf2cfb8b7fd15dcd2bac1a2987ad59addc9928741ae18530c7118
SHA512

a3993db4fcc210d3d784296cd39a0cd429baf3448403588b731f49122938e3e9b13dc5c241d3939b9b419696c313ea90128c26d3b63f1629e21aeef463643f5e
SSDEEP

1536:z6QFElP6n+gKmddpMOtEvwDpj3GYQbN/PKwNgp699GNtL1eXR:z6a+CdOOtEvwDpjczL

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

Processes:

resource	yara_rule
behavioral1/memory/3032-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral1/memory/3032-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2540-19-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

Processes:

resource	yara_rule
behavioral1/memory/3032-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral1/memory/3032-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2540-19-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

Processes:

resource	yara_rule
behavioral1/memory/3032-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral1/memory/3032-15-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2540-19-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

2540 asih.exe
Loads dropped DLL 1 IoCs

Processes:

2024-02-12_408dc5a06a7715efa519623f054bd2e5_cryptolocker.exe

pid process

3032 2024-02-12_408dc5a06a7715efa519623f054bd2e5_cryptolocker.exe

pid	process
2540	asih.exe

pid	process
3032	2024-02-12_408dc5a06a7715efa519623f054bd2e5_cryptolocker.exe

UPX packed file 4 IoCs

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

upx

Processes:

resource	yara_rule
behavioral1/memory/3032-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral1/memory/3032-15-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2540-19-0x0000000000500000-0x0000000000510000-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

Processes:

2024-02-12_408dc5a06a7715efa519623f054bd2e5_cryptolocker.exe

description	pid	process	target process
PID 3032 wrote to memory of 2540	3032	2024-02-12_408dc5a06a7715efa519623f054bd2e5_cryptolocker.exe	asih.exe
PID 3032 wrote to memory of 2540	3032	2024-02-12_408dc5a06a7715efa519623f054bd2e5_cryptolocker.exe	asih.exe
PID 3032 wrote to memory of 2540	3032	2024-02-12_408dc5a06a7715efa519623f054bd2e5_cryptolocker.exe	asih.exe
PID 3032 wrote to memory of 2540	3032	2024-02-12_408dc5a06a7715efa519623f054bd2e5_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-02-12_408dc5a06a7715efa519623f054bd2e5_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-12_408dc5a06a7715efa519623f054bd2e5_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:3032

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:2540

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
148KB

MD5
2b5f07c3a97f25d2a24818c910c6ff79

SHA1
f52877a8b7a0c1363cb6392fd8d6fb8072957bec

SHA256
344dd85e997c676056d8ddb9efcbbc54e8104f55042697f4913bf651b0050878

SHA512
84d52610bc4dd605758738465f2e7c5ff9f198555186d487c3152115c7c7f16f27c2f8fccab8a6b3c476efc605f5f4f10d533243c57d9e381188994502104c05

Download Submit
memory/2540-19-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2540-18-0x0000000000490000-0x0000000000496000-memory.dmp

Filesize
24KB

Download
memory/2540-21-0x0000000000250000-0x0000000000256000-memory.dmp

Filesize
24KB

Download
memory/3032-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3032-1-0x00000000002C0000-0x00000000002C6000-memory.dmp

Filesize
24KB

Download
memory/3032-2-0x0000000000310000-0x0000000000316000-memory.dmp

Filesize
24KB

Download
memory/3032-9-0x00000000002C0000-0x00000000002C6000-memory.dmp

Filesize
24KB

Download
memory/3032-15-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3032-16-0x0000000000640000-0x0000000000650000-memory.dmp

Filesize
64KB

Download
memory/3032-27-0x0000000000640000-0x0000000000650000-memory.dmp

Filesize
64KB

Download