37ace6bdee16051e9ea2efb1354478cad1615a4ffbe344b156c96232b5c5ef1e

Analysis

max time kernel
148s
max time network
149s
platform
windows7_x64
resource
win7-20231129-en
resource tags

arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
submitted
26/05/2024, 03:34

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General

Target

2024-05-26_44fde8a310323594034b5fc0019d478f_cryptolocker.exe
Size

89KB
MD5

44fde8a310323594034b5fc0019d478f
SHA1

8b40bf18f56a09aed2f097fa7927d67dcb1e2b12
SHA256

37ace6bdee16051e9ea2efb1354478cad1615a4ffbe344b156c96232b5c5ef1e
SHA512

45de7cabf40c3e0f897c121a9ded9319a0ec0e5a140f956349d9e087df4c9266bb6bda492e63365b54cf1c494db98bcd40920f9ee6ccbd59551f020eb243c914
SSDEEP

1536:n6QFElP6n+g9u9cvMOtEvwDpjYYTjipvF2bx1PQAAZ:n6a+1SEOtEvwDpjYYvQd2PK

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral1/memory/2136-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x00090000000141c0-11.dat	CryptoLocker_rule2
behavioral1/memory/3048-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2136-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/3048-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral1/memory/2136-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/files/0x00090000000141c0-11.dat	CryptoLocker_set1
behavioral1/memory/3048-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2136-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/3048-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral1/memory/2136-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/files/0x00090000000141c0-11.dat	UPX
behavioral1/memory/3048-16-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2136-15-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/3048-26-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
3048	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
2136	2024-05-26_44fde8a310323594034b5fc0019d478f_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2136-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/files/0x00090000000141c0-11.dat	upx
behavioral1/memory/3048-16-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2136-15-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/3048-26-0x0000000000500000-0x0000000000510000-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

description	pid	Process	procid_target
PID 2136 wrote to memory of 3048	2136	2024-05-26_44fde8a310323594034b5fc0019d478f_cryptolocker.exe	28
PID 2136 wrote to memory of 3048	2136	2024-05-26_44fde8a310323594034b5fc0019d478f_cryptolocker.exe	28
PID 2136 wrote to memory of 3048	2136	2024-05-26_44fde8a310323594034b5fc0019d478f_cryptolocker.exe	28
PID 2136 wrote to memory of 3048	2136	2024-05-26_44fde8a310323594034b5fc0019d478f_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-05-26_44fde8a310323594034b5fc0019d478f_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-26_44fde8a310323594034b5fc0019d478f_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2136
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3048

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
89KB

MD5
38fe73d4ae6cedd4a87224afea8dfa63

SHA1
afdbbb30e2c5f7bb578d39e8f3d76c7fbddfc9f0

SHA256
03bcf4337fed1769a8067353c93c92eb8a07ba22ee4d5226ced139b47d2b946c

SHA512
3c747e0f5bc16f9c1e256648e54ca5ab9d37ed92ecad4e1824110cfe2dee6691bbc3797b808a8509c798078ef01be5d8657ab1e0fe1ff975a8a2df2be91b19cf

Download Submit
memory/2136-2-0x0000000000480000-0x0000000000486000-memory.dmp

Filesize
24KB

Download
memory/2136-1-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2136-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2136-9-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2136-15-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3048-16-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3048-18-0x0000000000210000-0x0000000000216000-memory.dmp

Filesize
24KB

Download
memory/3048-25-0x00000000001D0000-0x00000000001D6000-memory.dmp

Filesize
24KB

Download
memory/3048-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download