733fbc856fb7b1463c792ac81d7ebc7b690757a7b0a6be7a6436b4a4ac13a39b

Analysis

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

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
13/03/2024, 22:27

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General

Target

2024-03-13_55bf61b811e609119117c02367263cf3_cryptolocker.exe
Size

50KB
MD5

55bf61b811e609119117c02367263cf3
SHA1

eb7edafd2aee92ca4a61b9880e770ce117374355
SHA256

733fbc856fb7b1463c792ac81d7ebc7b690757a7b0a6be7a6436b4a4ac13a39b
SHA512

587fb6d1c8dbaddbe79c6378283bf430ecd3a9a1977bc3be1a58e29173c287f3627159fdc2ed96fcf403a58d15ebfcaa349805932c110d1a609c4837320702c8
SSDEEP

768:79inqyNR/QtOOtEvwDpjBK/rJ+Nw8qnTHYhm3:79mqyNhQMOtEvwDpjBxe8Gp

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral1/memory/2192-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000b00000001224f-11.dat	CryptoLocker_rule2
behavioral1/memory/2092-16-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2192-15-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral1/memory/2192-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/files/0x000b00000001224f-11.dat	CryptoLocker_set1
behavioral1/memory/2092-16-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2192-15-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

Executes dropped EXE 1 IoCs

pid	Process
2092	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
2192	2024-03-13_55bf61b811e609119117c02367263cf3_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 2192 wrote to memory of 2092	2192	2024-03-13_55bf61b811e609119117c02367263cf3_cryptolocker.exe	28
PID 2192 wrote to memory of 2092	2192	2024-03-13_55bf61b811e609119117c02367263cf3_cryptolocker.exe	28
PID 2192 wrote to memory of 2092	2192	2024-03-13_55bf61b811e609119117c02367263cf3_cryptolocker.exe	28
PID 2192 wrote to memory of 2092	2192	2024-03-13_55bf61b811e609119117c02367263cf3_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-03-13_55bf61b811e609119117c02367263cf3_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-13_55bf61b811e609119117c02367263cf3_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2192
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2092

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
51KB

MD5
737a8886e19c74b51d93e01088b5c56b

SHA1
17a85852f50b10c8a8fa7a35c9bce4ab1c22929a

SHA256
7379db27e159422e2f09b9fad6e42fba0a28e11c549f1ae69bdca292312f60cd

SHA512
1018cacba6b45f5680cb423f8302a1e1a96a13b0a42241e4ddbd51d1fd3fd1d93ee2bc01ef7b8feb19f625d94521a3b9447611af3add7ab0223db259e6fbc4f5

Download Submit
memory/2092-16-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2092-18-0x0000000000300000-0x0000000000306000-memory.dmp

Filesize
24KB

Download
memory/2192-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2192-2-0x0000000000310000-0x0000000000316000-memory.dmp

Filesize
24KB

Download
memory/2192-1-0x00000000002C0000-0x00000000002C6000-memory.dmp

Filesize
24KB

Download
memory/2192-9-0x00000000002C0000-0x00000000002C6000-memory.dmp

Filesize
24KB

Download
memory/2192-15-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download