de2785df4b535d61b8ad23bc1b46c235619ecfc7880f31963d6aa49877381de6

Analysis

max time kernel
140s
max time network
145s
platform
windows7_x64
resource
win7-20240508-en
resource tags

arch:x64arch:x86image:win7-20240508-enlocale:en-usos:windows7-x64system
submitted
31/05/2024, 23:33

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General

Target

2024-05-31_7cb318f9d4b86cf44be7ecadf528d3ea_cryptolocker.exe
Size

39KB
MD5

7cb318f9d4b86cf44be7ecadf528d3ea
SHA1

6e13ded0b67e8d215b85a9405bf2e33598e83301
SHA256

de2785df4b535d61b8ad23bc1b46c235619ecfc7880f31963d6aa49877381de6
SHA512

68aeb140434289a6f85792cab40dd37e79a9db8422c6dcc51fb37604ecd5cb6fac142a18055fd0b69e926bd549ca80603b33f8c8c0c7492751fb89baeb147bef
SSDEEP

768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITY7f:qDdFJy3QMOtEvwDpjjWMl7Tsf

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral1/memory/2364-8-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000b00000001226d-15.dat	CryptoLocker_rule2
behavioral1/memory/2576-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2576-25-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral1/memory/2364-8-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/files/0x000b00000001226d-15.dat	CryptoLocker_set1
behavioral1/memory/2576-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2576-25-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral1/memory/2364-8-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/files/0x000b00000001226d-15.dat	UPX
behavioral1/memory/2576-16-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2576-25-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2576	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
2364	2024-05-31_7cb318f9d4b86cf44be7ecadf528d3ea_cryptolocker.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2364-8-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/files/0x000b00000001226d-15.dat	upx
behavioral1/memory/2576-16-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2576-25-0x0000000000500000-0x0000000000510000-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 2364 wrote to memory of 2576	2364	2024-05-31_7cb318f9d4b86cf44be7ecadf528d3ea_cryptolocker.exe	28
PID 2364 wrote to memory of 2576	2364	2024-05-31_7cb318f9d4b86cf44be7ecadf528d3ea_cryptolocker.exe	28
PID 2364 wrote to memory of 2576	2364	2024-05-31_7cb318f9d4b86cf44be7ecadf528d3ea_cryptolocker.exe	28
PID 2364 wrote to memory of 2576	2364	2024-05-31_7cb318f9d4b86cf44be7ecadf528d3ea_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-05-31_7cb318f9d4b86cf44be7ecadf528d3ea_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-31_7cb318f9d4b86cf44be7ecadf528d3ea_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2364
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2576

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
39KB

MD5
c849ab0cb4e8e10ff689fce6d2d86399

SHA1
ae2bcb8afb65dfb3deff220b9384192d7aa1f6b0

SHA256
648b4a520ecc9e4eab8b18eae81c56ee0415e1dcbfa85b00da4a40a1b66c6b84

SHA512
939ef57850a1fc8e0e5926cc48309f19a27302ba747adcd744aa8d8d61196781c1bcd851436bce5d1bbf7f084ee880fe34ee8c692c8e52d92e74dda989a55518

Download Submit
memory/2364-0-0x00000000001D0000-0x00000000001D6000-memory.dmp

Filesize
24KB

Download
memory/2364-1-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/2364-9-0x00000000001D0000-0x00000000001D6000-memory.dmp

Filesize
24KB

Download
memory/2364-8-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2576-16-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2576-18-0x0000000000290000-0x0000000000296000-memory.dmp

Filesize
24KB

Download
memory/2576-25-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download