f257f114143f09fde550c049c3ed07e73a42f469297b3070550088f9f5b3f999

Analysis

max time kernel
148s
max time network
149s
platform
windows7_x64
resource
win7-20240508-en
resource tags

arch:x64arch:x86image:win7-20240508-enlocale:en-usos:windows7-x64system
submitted
11/05/2024, 23:24

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General

Target

2024-05-11_3491fbef33009822fb6ea506d5b40e4e_cryptolocker.exe
Size

38KB
MD5

3491fbef33009822fb6ea506d5b40e4e
SHA1

e884a000548ee0edb35308b97ec38b2bfbc1c1fd
SHA256

f257f114143f09fde550c049c3ed07e73a42f469297b3070550088f9f5b3f999
SHA512

35f18d62e66f78a3f5ca6e462bdfb015c1df39a07b6896e16b21bebc00a1bc373d2251e5b308a2dbaee74c2ea118a2326bd2476c789d44a8d49e0c7ea7e2769a
SSDEEP

768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITYaBd:qDdFJy3QMOtEvwDpjjWMl7Tdr

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral1/memory/2412-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000d0000000122eb-11.dat	CryptoLocker_rule2
behavioral1/memory/2412-13-0x00000000004C0000-0x00000000004D0000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2412-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2828-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral1/memory/2412-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/files/0x000d0000000122eb-11.dat	CryptoLocker_set1
behavioral1/memory/2412-13-0x00000000004C0000-0x00000000004D0000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2412-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2828-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral1/memory/2412-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/files/0x000d0000000122eb-11.dat	UPX
behavioral1/memory/2412-13-0x00000000004C0000-0x00000000004D0000-memory.dmp	UPX
behavioral1/memory/2412-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2828-27-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2828	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
2412	2024-05-11_3491fbef33009822fb6ea506d5b40e4e_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2412-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/files/0x000d0000000122eb-11.dat	upx
behavioral1/memory/2412-13-0x00000000004C0000-0x00000000004D0000-memory.dmp	upx
behavioral1/memory/2412-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2828-27-0x0000000000500000-0x0000000000510000-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 2412 wrote to memory of 2828	2412	2024-05-11_3491fbef33009822fb6ea506d5b40e4e_cryptolocker.exe	28
PID 2412 wrote to memory of 2828	2412	2024-05-11_3491fbef33009822fb6ea506d5b40e4e_cryptolocker.exe	28
PID 2412 wrote to memory of 2828	2412	2024-05-11_3491fbef33009822fb6ea506d5b40e4e_cryptolocker.exe	28
PID 2412 wrote to memory of 2828	2412	2024-05-11_3491fbef33009822fb6ea506d5b40e4e_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-05-11_3491fbef33009822fb6ea506d5b40e4e_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-11_3491fbef33009822fb6ea506d5b40e4e_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2412
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2828

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
39KB

MD5
48d00c7796993d4bd4c91d45c4ad8758

SHA1
093e8bff0d53bc6385a14d0048c69217c5729335

SHA256
343ce53493cbd3728b1f5a60ad7a31753d799faa45a63c942715e79f4e3cb77d

SHA512
64cc8530513461fe87dd976a92407209f19a6a742f65ac9a98527e676fc8c16572f6a50b9fdf706c63ffa2c7e09fe7cda547b35cb0145bee08aca902c32fb225

Download Submit
memory/2412-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2412-2-0x00000000002C0000-0x00000000002C6000-memory.dmp

Filesize
24KB

Download
memory/2412-1-0x00000000002C0000-0x00000000002C6000-memory.dmp

Filesize
24KB

Download
memory/2412-3-0x0000000000380000-0x0000000000386000-memory.dmp

Filesize
24KB

Download
memory/2412-13-0x00000000004C0000-0x00000000004D0000-memory.dmp

Filesize
64KB

Download
memory/2412-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2828-19-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/2828-26-0x00000000001E0000-0x00000000001E6000-memory.dmp

Filesize
24KB

Download
memory/2828-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download