1c617070b59d3d78c544981a0130303e6acedf5b44e40dce6332a2a33cd0ce8f

Analysis

max time kernel
149s
max time network
138s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
11/03/2024, 18:48

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General

Target

2024-03-11_639d2b810fcf9d3e4b0e394803680ea0_cryptolocker.exe
Size

102KB
MD5

639d2b810fcf9d3e4b0e394803680ea0
SHA1

ebc6c7accde6e316e03a6cfc4acd3609c15d01b3
SHA256

1c617070b59d3d78c544981a0130303e6acedf5b44e40dce6332a2a33cd0ce8f
SHA512

722e3a6f291640e2cc1bab2f63cecb41435489688f2af46ffad9911d97b82e0d7583209097e2884d3c1b9cf470c9e5f89935a6ae7caf2a22685acd40528f2b5c
SSDEEP

1536:qkmnpomddpMOtEvwDpjJGYQbN/PKwNgpwqWsviy69:AnBdOOtEvwDpj6zR

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral1/memory/2512-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000b000000012256-11.dat	CryptoLocker_rule2
behavioral1/memory/2512-15-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/1028-16-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/1028-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral1/memory/2512-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/files/0x000b000000012256-11.dat	CryptoLocker_set1
behavioral1/memory/2512-15-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/memory/1028-16-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/memory/1028-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral1/memory/2512-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral1/files/0x000b000000012256-11.dat	UPX
behavioral1/memory/2512-15-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral1/memory/1028-16-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral1/memory/1028-26-0x0000000000500000-0x000000000050F000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
1028	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
2512	2024-03-11_639d2b810fcf9d3e4b0e394803680ea0_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2512-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral1/files/0x000b000000012256-11.dat	upx
behavioral1/memory/2512-15-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral1/memory/1028-16-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral1/memory/1028-26-0x0000000000500000-0x000000000050F000-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 2512 wrote to memory of 1028	2512	2024-03-11_639d2b810fcf9d3e4b0e394803680ea0_cryptolocker.exe	28
PID 2512 wrote to memory of 1028	2512	2024-03-11_639d2b810fcf9d3e4b0e394803680ea0_cryptolocker.exe	28
PID 2512 wrote to memory of 1028	2512	2024-03-11_639d2b810fcf9d3e4b0e394803680ea0_cryptolocker.exe	28
PID 2512 wrote to memory of 1028	2512	2024-03-11_639d2b810fcf9d3e4b0e394803680ea0_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-03-11_639d2b810fcf9d3e4b0e394803680ea0_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-11_639d2b810fcf9d3e4b0e394803680ea0_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2512
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1028

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
102KB

MD5
803f3f645d937f45443a2e1f64380023

SHA1
d30c73fab67563447b754cef8d39ce6aa0415a4a

SHA256
208906a441e8d35d165e4f861c522faa20534f5136d130381ae99c29fa38ecfa

SHA512
d8fd5c275afc9ffafa40e93f567d4be3a109e358bc04a3b5c785f64d1da9e4116c34c422d46fa673259688a37039983daf698e642cbef940b578f474f4b14f8a

Download Submit
memory/1028-16-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/1028-18-0x0000000000340000-0x0000000000346000-memory.dmp

Filesize
24KB

Download
memory/1028-22-0x0000000000300000-0x0000000000306000-memory.dmp

Filesize
24KB

Download
memory/1028-26-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2512-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2512-1-0x0000000000250000-0x0000000000256000-memory.dmp

Filesize
24KB

Download
memory/2512-2-0x0000000000290000-0x0000000000296000-memory.dmp

Filesize
24KB

Download
memory/2512-8-0x0000000000250000-0x0000000000256000-memory.dmp

Filesize
24KB

Download
memory/2512-15-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download