58f7e109b3a38fcf70236bf6f705edb0fbbc145ebf9725c0a7e4b3ce55d8c005

Analysis

max time kernel
148s
max time network
151s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
20-05-2024 22:28

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General

Target

2024-05-20_7fd78f2f7098501ebbc5f40d8ccd26fa_cryptolocker.exe
Size

39KB
MD5

7fd78f2f7098501ebbc5f40d8ccd26fa
SHA1

52ce4b04f3e36f4b57027198fecd33739fe3e653
SHA256

58f7e109b3a38fcf70236bf6f705edb0fbbc145ebf9725c0a7e4b3ce55d8c005
SHA512

747217bede9985dca2186f16256910ea89c4631a1d26f9397bff0a17509eca42b85a4cee4500673ffc3c032085a4e5cdfaa5a8d16deee21e9f9b57b53f60d89a
SSDEEP

768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITY/W:qDdFJy3QMOtEvwDpjjWMl7TP

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1888-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral1/memory/1888-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2788-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1888-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral1/memory/1888-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2788-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1888-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral1/memory/1888-16-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2788-26-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

2788 asih.exe
Loads dropped DLL 1 IoCs

Processes:

2024-05-20_7fd78f2f7098501ebbc5f40d8ccd26fa_cryptolocker.exe

pid process

1888 2024-05-20_7fd78f2f7098501ebbc5f40d8ccd26fa_cryptolocker.exe

pid	process
2788	asih.exe

pid	process
1888	2024-05-20_7fd78f2f7098501ebbc5f40d8ccd26fa_cryptolocker.exe

UPX packed file 4 IoCs

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

upx

Processes:

resource	yara_rule
behavioral1/memory/1888-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral1/memory/1888-16-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2788-26-0x0000000000500000-0x0000000000510000-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

Processes:

2024-05-20_7fd78f2f7098501ebbc5f40d8ccd26fa_cryptolocker.exe

description	pid	process	target process
PID 1888 wrote to memory of 2788	1888	2024-05-20_7fd78f2f7098501ebbc5f40d8ccd26fa_cryptolocker.exe	asih.exe
PID 1888 wrote to memory of 2788	1888	2024-05-20_7fd78f2f7098501ebbc5f40d8ccd26fa_cryptolocker.exe	asih.exe
PID 1888 wrote to memory of 2788	1888	2024-05-20_7fd78f2f7098501ebbc5f40d8ccd26fa_cryptolocker.exe	asih.exe
PID 1888 wrote to memory of 2788	1888	2024-05-20_7fd78f2f7098501ebbc5f40d8ccd26fa_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-20_7fd78f2f7098501ebbc5f40d8ccd26fa_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-20_7fd78f2f7098501ebbc5f40d8ccd26fa_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1888
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2788

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
40KB

MD5
b775ad5195059847791452e9ba551b13

SHA1
508f2ede3a2ab011849257774f07356e2cc7d426

SHA256
44c8525481a069cdfef666658d4249131fe6ff49354c1c21ef298c01a0457bc3

SHA512
0e67efbe85561f3c362a1f9e57a85c7bf9cbfe52ab5981b925e73f2aa8cfa3274aa58d6b504be05f1cc7f977dfe7f8080717f622e9f031f96b25374c74e9f807

Download Submit
memory/1888-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1888-1-0x00000000002D0000-0x00000000002D6000-memory.dmp

Filesize
24KB

Download
memory/1888-2-0x0000000000310000-0x0000000000316000-memory.dmp

Filesize
24KB

Download
memory/1888-9-0x00000000002D0000-0x00000000002D6000-memory.dmp

Filesize
24KB

Download
memory/1888-16-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2788-18-0x0000000000600000-0x0000000000606000-memory.dmp

Filesize
24KB

Download
memory/2788-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2788-25-0x00000000002C0000-0x00000000002C6000-memory.dmp

Filesize
24KB

Download