ef3cee48b5696fdb2aa79a48a120e3800a0b55b89c594c9f6140aeaff59712b7

Analysis

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

arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
submitted
27/05/2024, 21:26

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General

Target

2024-05-27_37ee6bb2525b24fc128a6375aad28db2_cryptolocker.exe
Size

79KB
MD5

37ee6bb2525b24fc128a6375aad28db2
SHA1

6e8fe972b93f85449de22ab632df017c6d1c5cd1
SHA256

ef3cee48b5696fdb2aa79a48a120e3800a0b55b89c594c9f6140aeaff59712b7
SHA512

4d9d5d3e0abf72a4d456e4b572720e6926a61b420ba9ad4fcf0d6ff30d2b025d29e870450f490c0d2fba69bb503aff35140465ac2a1520e16d23de03cc7770d1
SSDEEP

1536:T6QFElP6n+gxmddpMOtEvwDpjwaxTNUOAkXtBdJcR1:T6a+rdOOtEvwDpjNtQ

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral1/memory/1108-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000b000000014b31-14.dat	CryptoLocker_rule2
behavioral1/memory/1108-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/3040-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/3040-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral1/memory/1108-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/files/0x000b000000014b31-14.dat	CryptoLocker_set1
behavioral1/memory/1108-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/3040-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/3040-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral1/memory/1108-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/files/0x000b000000014b31-14.dat	UPX
behavioral1/memory/1108-15-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/3040-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/3040-26-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
3040	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
1108	2024-05-27_37ee6bb2525b24fc128a6375aad28db2_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/1108-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/files/0x000b000000014b31-14.dat	upx
behavioral1/memory/1108-15-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/3040-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/3040-26-0x0000000000500000-0x0000000000510000-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 1108 wrote to memory of 3040	1108	2024-05-27_37ee6bb2525b24fc128a6375aad28db2_cryptolocker.exe	28
PID 1108 wrote to memory of 3040	1108	2024-05-27_37ee6bb2525b24fc128a6375aad28db2_cryptolocker.exe	28
PID 1108 wrote to memory of 3040	1108	2024-05-27_37ee6bb2525b24fc128a6375aad28db2_cryptolocker.exe	28
PID 1108 wrote to memory of 3040	1108	2024-05-27_37ee6bb2525b24fc128a6375aad28db2_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-05-27_37ee6bb2525b24fc128a6375aad28db2_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-27_37ee6bb2525b24fc128a6375aad28db2_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1108
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3040

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

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

Filesize
79KB

MD5
1505b0a23b692d1d3b1de20da211b617

SHA1
65b739ab3cb04cea523fbe39a4603f1f2f22ec8b

SHA256
7eccb4e0edc50021a6ce312c9d7b570949559023c71de81b4ccc1687d819efbe

SHA512
9dda6dafa8e0f81d89d2319522a2b45dd03c4c070685c8b6e3e7e6df81d51a2714ab43f9128e59404c8a18f949e41c8e8e8a595ff89e54f2f22016ad17423294

Download Submit
memory/1108-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1108-1-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/1108-9-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/1108-2-0x0000000001CA0000-0x0000000001CA6000-memory.dmp

Filesize
24KB

Download
memory/1108-15-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3040-25-0x0000000000320000-0x0000000000326000-memory.dmp

Filesize
24KB

Download
memory/3040-18-0x0000000000360000-0x0000000000366000-memory.dmp

Filesize
24KB

Download
memory/3040-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3040-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download