05fb3f761ae0530c5ca4677f467954e21fa62a743409d0559f8f36978faf5584

Analysis

max time kernel
150s
max time network
150s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
21-05-2024 15:41

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General

Target

2024-05-21_6bfebcfbc6db59fc9f3e40b2d5716156_cryptolocker.exe
Size

73KB
MD5

6bfebcfbc6db59fc9f3e40b2d5716156
SHA1

f6267ae49ede661f383ef2b9eb5301715f2df754
SHA256

05fb3f761ae0530c5ca4677f467954e21fa62a743409d0559f8f36978faf5584
SHA512

0557a3fb6364ed0aa7cfa04a51113f883146ce3344a6903141a7250211e8815da9e7dff1704b474743de468a648599aa7c6e70c46dd58126f8b3ba673c650e9e
SSDEEP

1536:nj+4zs2cPVhlMOtEvwDpj4H8u8rZVTs9Vy:C4Q2c94OtEvwDpj4H8z9

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1132-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
\Users\Admin\AppData\Local\Temp\misid.exe	CryptoLocker_rule2
behavioral1/memory/1132-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2756-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2756-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 3 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1132-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2756-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2756-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1132-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
\Users\Admin\AppData\Local\Temp\misid.exe	UPX
behavioral1/memory/1132-16-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2756-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2756-27-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

Processes:

misid.exe

pid process

2756 misid.exe
Loads dropped DLL 1 IoCs

Processes:

2024-05-21_6bfebcfbc6db59fc9f3e40b2d5716156_cryptolocker.exe

pid process

1132 2024-05-21_6bfebcfbc6db59fc9f3e40b2d5716156_cryptolocker.exe

pid	process
2756	misid.exe

pid	process
1132	2024-05-21_6bfebcfbc6db59fc9f3e40b2d5716156_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

Processes:

resource	yara_rule
behavioral1/memory/1132-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
\Users\Admin\AppData\Local\Temp\misid.exe	upx
behavioral1/memory/1132-16-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2756-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2756-27-0x0000000000500000-0x0000000000510000-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:

2024-05-21_6bfebcfbc6db59fc9f3e40b2d5716156_cryptolocker.exe

description	pid	process	target process
PID 1132 wrote to memory of 2756	1132	2024-05-21_6bfebcfbc6db59fc9f3e40b2d5716156_cryptolocker.exe	misid.exe
PID 1132 wrote to memory of 2756	1132	2024-05-21_6bfebcfbc6db59fc9f3e40b2d5716156_cryptolocker.exe	misid.exe
PID 1132 wrote to memory of 2756	1132	2024-05-21_6bfebcfbc6db59fc9f3e40b2d5716156_cryptolocker.exe	misid.exe
PID 1132 wrote to memory of 2756	1132	2024-05-21_6bfebcfbc6db59fc9f3e40b2d5716156_cryptolocker.exe	misid.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-21_6bfebcfbc6db59fc9f3e40b2d5716156_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-21_6bfebcfbc6db59fc9f3e40b2d5716156_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1132

C:\Users\Admin\AppData\Local\Temp\misid.exe
"C:\Users\Admin\AppData\Local\Temp\misid.exe"
2⤵
- Executes dropped EXE
PID:2756

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\misid.exe

Filesize
73KB

MD5
ead64e9c173c83bd129c77910009e1af

SHA1
16d47fb033dbb6b1ff1bef2df3b4383c57882239

SHA256
b1d88238426a1ea92aa6e7c0097fefec0788676698b7a2c4a66fe001242e4e6b

SHA512
b66060e3826f8c6a103659f693cbf049d95829e776d74860934244c31098aa2c2ba11f5879e6c42449a601f31e29a8f9959e7aaed5f55a4842470aff13081c56

Download Submit
memory/1132-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1132-8-0x0000000000250000-0x0000000000256000-memory.dmp

Filesize
24KB

Download
memory/1132-1-0x0000000000250000-0x0000000000256000-memory.dmp

Filesize
24KB

Download
memory/1132-2-0x0000000000350000-0x0000000000356000-memory.dmp

Filesize
24KB

Download
memory/1132-16-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2756-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2756-19-0x0000000000310000-0x0000000000316000-memory.dmp

Filesize
24KB

Download
memory/2756-26-0x00000000002D0000-0x00000000002D6000-memory.dmp

Filesize
24KB

Download
memory/2756-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download