0f2bf66c104fb4ac94b831ac7cbe410b637796b70735642b490e6198cc6f1471

Analysis

max time kernel
148s
max time network
148s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
14-05-2024 17:28

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General

Target

2024-05-14_f4ca3679edb9a49f6fbd2a2e9e2badb7_cryptolocker.exe
Size

88KB
MD5

f4ca3679edb9a49f6fbd2a2e9e2badb7
SHA1

f308085a99a5a41a61186a7c3735eefbab0e333d
SHA256

0f2bf66c104fb4ac94b831ac7cbe410b637796b70735642b490e6198cc6f1471
SHA512

965a3a2445d8667850b927fa33f98b83994e01f2428069d5dff39ee27f361ba43d26eb078ad9c59dbc7e433ac37f193965c60491c0435c45ce09423e81fde7a6
SSDEEP

768:qkmnjFom/kLyMro2GtOOtEvwDpjeY10Y/YMsvlMdwPK80GQuchoIgtIODp:qkmnpomddpMOtEvwDpjJGYQbN/PKwMgn

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral1/memory/1912-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000b00000001223a-11.dat	CryptoLocker_rule2
behavioral1/memory/1912-13-0x0000000002A80000-0x0000000002A8F000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/1912-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/1248-27-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral1/memory/1912-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/files/0x000b00000001223a-11.dat	CryptoLocker_set1
behavioral1/memory/1912-13-0x0000000002A80000-0x0000000002A8F000-memory.dmp	CryptoLocker_set1
behavioral1/memory/1912-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/memory/1248-27-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral1/memory/1912-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral1/files/0x000b00000001223a-11.dat	UPX
behavioral1/memory/1912-13-0x0000000002A80000-0x0000000002A8F000-memory.dmp	UPX
behavioral1/memory/1912-17-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral1/memory/1248-27-0x0000000000500000-0x000000000050F000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
1248	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
1912	2024-05-14_f4ca3679edb9a49f6fbd2a2e9e2badb7_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/1912-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral1/files/0x000b00000001223a-11.dat	upx
behavioral1/memory/1912-13-0x0000000002A80000-0x0000000002A8F000-memory.dmp	upx
behavioral1/memory/1912-17-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral1/memory/1248-27-0x0000000000500000-0x000000000050F000-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

description	pid	Process	procid_target
PID 1912 wrote to memory of 1248	1912	2024-05-14_f4ca3679edb9a49f6fbd2a2e9e2badb7_cryptolocker.exe	28
PID 1912 wrote to memory of 1248	1912	2024-05-14_f4ca3679edb9a49f6fbd2a2e9e2badb7_cryptolocker.exe	28
PID 1912 wrote to memory of 1248	1912	2024-05-14_f4ca3679edb9a49f6fbd2a2e9e2badb7_cryptolocker.exe	28
PID 1912 wrote to memory of 1248	1912	2024-05-14_f4ca3679edb9a49f6fbd2a2e9e2badb7_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-05-14_f4ca3679edb9a49f6fbd2a2e9e2badb7_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-14_f4ca3679edb9a49f6fbd2a2e9e2badb7_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1912
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1248

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
88KB

MD5
6c55f8e85b308ed356440440f3bf7302

SHA1
779c56d990eee2eb95cf73000f8e8791daa3cdc1

SHA256
2321f1f59bd590e6c7c1ec8a9f1d7189a07edfe908e880eab8ab203f2e1a67ff

SHA512
84d22653b7358f33866802df271257578b20b6ff20dca80c8b2810569879167e07243a3290d4b15d5d0af692ddc7ee34e2ad1c9f3a528c1fffb2784718c98d72

Download Submit
memory/1248-26-0x00000000002C0000-0x00000000002C6000-memory.dmp

Filesize
24KB

Download
memory/1248-27-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/1912-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/1912-1-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/1912-2-0x0000000000340000-0x0000000000346000-memory.dmp

Filesize
24KB

Download
memory/1912-9-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/1912-13-0x0000000002A80000-0x0000000002A8F000-memory.dmp

Filesize
60KB

Download
memory/1912-17-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download