d669a58a8a9cefb67bce669a44a1bdcc49bf27004ca442454a17d15f866a9067

Analysis

max time kernel
148s
max time network
148s
platform
windows7_x64
resource
win7-20240419-en
resource tags

arch:x64arch:x86image:win7-20240419-enlocale:en-usos:windows7-x64system
submitted
23-05-2024 01:47

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General

Target

2024-05-23_5d8ff120ae03d51846d40de7633c5020_cryptolocker.exe
Size

67KB
MD5

5d8ff120ae03d51846d40de7633c5020
SHA1

35b7b8a362ea46c694bb0a575c4ea93906a3954f
SHA256

d669a58a8a9cefb67bce669a44a1bdcc49bf27004ca442454a17d15f866a9067
SHA512

4fa09153068edc6b53fbe5a0b4e6f92f8f743ca9f6f7b691c096a4dfffca9fba62b2e3dc3e93cca4812b47f3de4b379d6aab7300a5302eb089d1ac41579f0230
SSDEEP

1536:P8mnK6QFElP6n+gymddpMOtEvwDpjYibAoQRj:1nK6a+qdOOtEvwDpjC

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1320-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral1/memory/1320-14-0x00000000023A0000-0x00000000023B0000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/1320-16-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2892-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1320-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral1/memory/1320-14-0x00000000023A0000-0x00000000023B0000-memory.dmp	CryptoLocker_set1
behavioral1/memory/1320-16-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral1/memory/2892-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1320-0-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral1/memory/1320-16-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral1/memory/2892-26-0x0000000000500000-0x000000000050F311-memory.dmp	UPX

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

2892 asih.exe
Loads dropped DLL 1 IoCs

Processes:

2024-05-23_5d8ff120ae03d51846d40de7633c5020_cryptolocker.exe

pid process

1320 2024-05-23_5d8ff120ae03d51846d40de7633c5020_cryptolocker.exe

pid	process
2892	asih.exe

pid	process
1320	2024-05-23_5d8ff120ae03d51846d40de7633c5020_cryptolocker.exe

UPX packed file 4 IoCs

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

upx

Processes:

resource	yara_rule
behavioral1/memory/1320-0-0x0000000000500000-0x000000000050F311-memory.dmp	upx
\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral1/memory/1320-16-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral1/memory/2892-26-0x0000000000500000-0x000000000050F311-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

Processes:

2024-05-23_5d8ff120ae03d51846d40de7633c5020_cryptolocker.exe

description	pid	process	target process
PID 1320 wrote to memory of 2892	1320	2024-05-23_5d8ff120ae03d51846d40de7633c5020_cryptolocker.exe	asih.exe
PID 1320 wrote to memory of 2892	1320	2024-05-23_5d8ff120ae03d51846d40de7633c5020_cryptolocker.exe	asih.exe
PID 1320 wrote to memory of 2892	1320	2024-05-23_5d8ff120ae03d51846d40de7633c5020_cryptolocker.exe	asih.exe
PID 1320 wrote to memory of 2892	1320	2024-05-23_5d8ff120ae03d51846d40de7633c5020_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-23_5d8ff120ae03d51846d40de7633c5020_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-23_5d8ff120ae03d51846d40de7633c5020_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1320

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:2892

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

\Users\Admin\AppData\Local\Temp\asih.exe
Filesize
67KB

MD5
8149ac78e21a77519db0f88b9f71ec7f

SHA1
7e3a6076c4e41fd3790d202ff3ba9fd611b4af36

SHA256
391d59d7c278c8c2e7f79d04a5933f738dcb870238545e5f52499d68eb2b2fc1

SHA512
d7a2ff28ed0d15fb5db43bfa31f9f694af038589dabe37980ca54fbc9e3d0fa1f439bdd1848b589eac24874625d2524c92f3c3a768175c573ec4b7f279720c83

Download Submit
memory/1320-0-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/1320-1-0x00000000002C0000-0x00000000002C6000-memory.dmp

Filesize
24KB

Download
memory/1320-2-0x0000000000460000-0x0000000000466000-memory.dmp

Filesize
24KB

Download
memory/1320-9-0x00000000002C0000-0x00000000002C6000-memory.dmp

Filesize
24KB

Download
memory/1320-14-0x00000000023A0000-0x00000000023B0000-memory.dmp

Filesize
64KB

Download
memory/1320-16-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/2892-26-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/2892-25-0x00000000001E0000-0x00000000001E6000-memory.dmp

Filesize
24KB

Download
memory/2892-18-0x00000000002A0000-0x00000000002A6000-memory.dmp

Filesize
24KB

Download