31a9d2a89ebb305baf4900ad47c8f0016a0e324b4f156ea989a54dd7d195ca2c

Analysis

max time kernel
150s
max time network
155s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
17/02/2024, 15:39

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General

Target

2024-02-17_cfe827fffe2b43ac2bce76386927b6f8_cryptolocker.exe
Size

59KB
MD5

cfe827fffe2b43ac2bce76386927b6f8
SHA1

40717666f3e8bf7dd7de66a6a88cdddc0301b378
SHA256

31a9d2a89ebb305baf4900ad47c8f0016a0e324b4f156ea989a54dd7d195ca2c
SHA512

9f3bf2768c57670c101e907b47ff9d1bdd58f1112f5b63feab25c6e2ca9e445f316e9c3432f4272930846f3786830680abb4a99f73c4541c53b90e47654a7943
SSDEEP

1536:qmbhXDmjr5MOtEvwDpj5cDtKkQZQRKb61vSbgtsH:BbdDmjr+OtEvwDpjM8f

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral1/memory/2644-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000c000000012243-11.dat	CryptoLocker_rule2
behavioral1/memory/2044-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2644-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2044-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 3 IoCs

resource	yara_rule
behavioral1/memory/2044-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2644-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2044-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral1/memory/2644-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/files/0x000c000000012243-11.dat	UPX
behavioral1/memory/2044-16-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2644-15-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2044-26-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2044	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
2644	2024-02-17_cfe827fffe2b43ac2bce76386927b6f8_cryptolocker.exe

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 2644 wrote to memory of 2044	2644	2024-02-17_cfe827fffe2b43ac2bce76386927b6f8_cryptolocker.exe	28
PID 2644 wrote to memory of 2044	2644	2024-02-17_cfe827fffe2b43ac2bce76386927b6f8_cryptolocker.exe	28
PID 2644 wrote to memory of 2044	2644	2024-02-17_cfe827fffe2b43ac2bce76386927b6f8_cryptolocker.exe	28
PID 2644 wrote to memory of 2044	2644	2024-02-17_cfe827fffe2b43ac2bce76386927b6f8_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-02-17_cfe827fffe2b43ac2bce76386927b6f8_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-17_cfe827fffe2b43ac2bce76386927b6f8_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2644
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2044

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

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Downloads

\Users\Admin\AppData\Local\Temp\asih.exe

Filesize
60KB

MD5
83e35e4e519f423c072a57354e1946d6

SHA1
3e2f61b68afcd7b9987e372dd7222e1365703294

SHA256
73e1d123f2d0d27dc2f443caccab8a616892a83d83a0877141b6167f290d126d

SHA512
184024a5957bbd6ce96be11dbdd62ada62e74e0401f96ebf3ebedb5c104e0d5811f41a75b2933ce13a53bfd168bb45d1f1d758be692cd28dd49f2e781a66fcf2

Download Submit
memory/2044-16-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2044-18-0x0000000000450000-0x0000000000456000-memory.dmp

Filesize
24KB

Download
memory/2044-19-0x0000000000420000-0x0000000000426000-memory.dmp

Filesize
24KB

Download
memory/2044-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2644-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2644-1-0x00000000001D0000-0x00000000001D6000-memory.dmp

Filesize
24KB

Download
memory/2644-2-0x0000000000200000-0x0000000000206000-memory.dmp

Filesize
24KB

Download
memory/2644-4-0x00000000001D0000-0x00000000001D6000-memory.dmp

Filesize
24KB

Download
memory/2644-15-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download