aca1a0c73b75bba9b5d1d0de1a026f27b71d7458ecbb2752303cba49b271e348

Analysis

max time kernel
148s
max time network
149s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
07/03/2024, 23:29

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General

Target

2024-03-07_57973aca44473d723dd9b977242214d8_cryptolocker.exe
Size

59KB
MD5

57973aca44473d723dd9b977242214d8
SHA1

0091bdb5732b03a27eb8174c5d2200be206d9dd7
SHA256

aca1a0c73b75bba9b5d1d0de1a026f27b71d7458ecbb2752303cba49b271e348
SHA512

7850d7722ab9c1a3cb66d0a35ae94d7b09a3a23ae0bbc308aef1789b8d36628da40461474cfdc1d45f16fb62823ca7815e2a55c5f0baa1b04d27c8aa5fada6ea
SSDEEP

1536:qmbhXDmjr5MOtEvwDpj5cDtKkQZQRKb614v:BbdDmjr+OtEvwDpjMs

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 6 IoCs

resource	yara_rule
behavioral1/memory/2740-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000b00000001313f-11.dat	CryptoLocker_rule2
behavioral1/memory/2740-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/3028-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2740-13-0x0000000000480000-0x0000000000490000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/3028-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 3 IoCs

resource	yara_rule
behavioral1/memory/2740-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/3028-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/3028-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 6 IoCs

resource	yara_rule
behavioral1/memory/2740-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/files/0x000b00000001313f-11.dat	UPX
behavioral1/memory/2740-15-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/3028-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2740-13-0x0000000000480000-0x0000000000490000-memory.dmp	UPX
behavioral1/memory/3028-27-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
3028	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
2740	2024-03-07_57973aca44473d723dd9b977242214d8_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 2740 wrote to memory of 3028	2740	2024-03-07_57973aca44473d723dd9b977242214d8_cryptolocker.exe	28
PID 2740 wrote to memory of 3028	2740	2024-03-07_57973aca44473d723dd9b977242214d8_cryptolocker.exe	28
PID 2740 wrote to memory of 3028	2740	2024-03-07_57973aca44473d723dd9b977242214d8_cryptolocker.exe	28
PID 2740 wrote to memory of 3028	2740	2024-03-07_57973aca44473d723dd9b977242214d8_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-03-07_57973aca44473d723dd9b977242214d8_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-07_57973aca44473d723dd9b977242214d8_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2740
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3028

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
59KB

MD5
3f0372f4e0152bef3455d8c3a87a033e

SHA1
b9b9a1cf9db4883808fee561d8bf7429e1cb3446

SHA256
a400e03046e77a5c70552b39d298c84612af72f9484631862c4ea0be1751d568

SHA512
fda24246f3843f273b1b462f6e6af9f40feb1f78af0fb1169a1e356801a44fa11f146afc161a702015da442752dcac70c748d437afda0bd4d06c117191b3eac0

Download Submit
memory/2740-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2740-1-0x0000000000330000-0x0000000000336000-memory.dmp

Filesize
24KB

Download
memory/2740-2-0x0000000000370000-0x0000000000376000-memory.dmp

Filesize
24KB

Download
memory/2740-9-0x0000000000330000-0x0000000000336000-memory.dmp

Filesize
24KB

Download
memory/2740-15-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2740-13-0x0000000000480000-0x0000000000490000-memory.dmp

Filesize
64KB

Download
memory/3028-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3028-19-0x0000000000380000-0x0000000000386000-memory.dmp

Filesize
24KB

Download
memory/3028-26-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/3028-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download