397286af6ebdf1e63e62b713019986ba2226f4b7faa87ff60c4ef3c1e2f0b116

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
24-05-2024 04:30

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General

Target

2024-05-24_5fd8313cabd1cd4a639f7bdebb9b5c68_cryptolocker.exe
Size

38KB
MD5

5fd8313cabd1cd4a639f7bdebb9b5c68
SHA1

dd972190a9ab976cf7807c4199171108b561ea09
SHA256

397286af6ebdf1e63e62b713019986ba2226f4b7faa87ff60c4ef3c1e2f0b116
SHA512

85a8f4a21c834c66042002a7169ee659ef922a588e8cbecae5bb4020ce5ea240f669f8ecb91a0206e2ae14f5ff9b531d8988174a602feeb7833033d219cf15a2
SSDEEP

768:qUmnjFom/kLyMro2GtOOtEvwDpjeMLam5axK38n0:qUmnpomddpMOtEvwDpjjaYaQ80

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2504-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral1/memory/2504-16-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2768-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2504-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral1/memory/2504-16-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2768-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2504-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral1/memory/2504-16-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral1/memory/2768-26-0x0000000000500000-0x000000000050F000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

2768 asih.exe
Loads dropped DLL 1 IoCs

Processes:

2024-05-24_5fd8313cabd1cd4a639f7bdebb9b5c68_cryptolocker.exe

pid process

2504 2024-05-24_5fd8313cabd1cd4a639f7bdebb9b5c68_cryptolocker.exe

pid	process
2768	asih.exe

pid	process
2504	2024-05-24_5fd8313cabd1cd4a639f7bdebb9b5c68_cryptolocker.exe

UPX packed file 4 IoCs

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

upx

Processes:

resource	yara_rule
behavioral1/memory/2504-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral1/memory/2504-16-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral1/memory/2768-26-0x0000000000500000-0x000000000050F000-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

Processes:

2024-05-24_5fd8313cabd1cd4a639f7bdebb9b5c68_cryptolocker.exe

description	pid	process	target process
PID 2504 wrote to memory of 2768	2504	2024-05-24_5fd8313cabd1cd4a639f7bdebb9b5c68_cryptolocker.exe	asih.exe
PID 2504 wrote to memory of 2768	2504	2024-05-24_5fd8313cabd1cd4a639f7bdebb9b5c68_cryptolocker.exe	asih.exe
PID 2504 wrote to memory of 2768	2504	2024-05-24_5fd8313cabd1cd4a639f7bdebb9b5c68_cryptolocker.exe	asih.exe
PID 2504 wrote to memory of 2768	2504	2024-05-24_5fd8313cabd1cd4a639f7bdebb9b5c68_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-24_5fd8313cabd1cd4a639f7bdebb9b5c68_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-24_5fd8313cabd1cd4a639f7bdebb9b5c68_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2504
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2768

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
38KB

MD5
8d0c20a24972f26cf708e9c01a062691

SHA1
ba57a9a9dc4aee3062a1a33720c7cee41a79ad3f

SHA256
5b6a059357663ad34fb9ccd0b8d351fb6ae4fe90205254b7b07e122c75d52851

SHA512
e5620a4e7d2ca1b018ddd9040d61c0cb84585956e05e38c65111c373f39ae6364e569c9ddbdc998044f79e8da9db333656e14e57d4aeefb78d0801d14f7a66d3

Download Submit
memory/2504-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2504-2-0x0000000000470000-0x0000000000476000-memory.dmp

Filesize
24KB

Download
memory/2504-9-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2504-1-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2504-16-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2768-25-0x0000000000420000-0x0000000000426000-memory.dmp

Filesize
24KB

Download
memory/2768-18-0x0000000000450000-0x0000000000456000-memory.dmp

Filesize
24KB

Download
memory/2768-26-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download