ac580a9f56f53c50e89ce074d2593ddb5feaf06763e4fbb381b58ca484f15dfb

Analysis

max time kernel
150s
max time network
153s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
12-02-2024 20:20

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General

Target

2024-02-12_cc6ded129f4a2112d3872e5ed64dbc5e_cryptolocker.exe
Size

56KB
MD5

cc6ded129f4a2112d3872e5ed64dbc5e
SHA1

8ba8a1a88536126d4c73371453ed61b5c4986c46
SHA256

ac580a9f56f53c50e89ce074d2593ddb5feaf06763e4fbb381b58ca484f15dfb
SHA512

98cb53efabd2d769ceedfe27b160637a7918dab66da242486c02e481fe055d574fa89846c8d78c8a9c1758728265e58c2cfad4ce7ad2e81a5fdc66b90c47f726
SSDEEP

1536:qmbhXDmjr5MOtEvwDpj5cDtKkQZQRKb61l:BbdDmjr+OtEvwDpjMz

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/3044-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral1/memory/3044-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2236-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2236-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 3 IoCs

Processes:

resource	yara_rule
behavioral1/memory/3044-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2236-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2236-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/3044-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral1/memory/3044-15-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2236-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2236-27-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

2236 asih.exe
Loads dropped DLL 1 IoCs

Processes:

2024-02-12_cc6ded129f4a2112d3872e5ed64dbc5e_cryptolocker.exe

pid process

3044 2024-02-12_cc6ded129f4a2112d3872e5ed64dbc5e_cryptolocker.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
2236	asih.exe

pid	process
3044	2024-02-12_cc6ded129f4a2112d3872e5ed64dbc5e_cryptolocker.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

2024-02-12_cc6ded129f4a2112d3872e5ed64dbc5e_cryptolocker.exe

description	pid	process	target process
PID 3044 wrote to memory of 2236	3044	2024-02-12_cc6ded129f4a2112d3872e5ed64dbc5e_cryptolocker.exe	asih.exe
PID 3044 wrote to memory of 2236	3044	2024-02-12_cc6ded129f4a2112d3872e5ed64dbc5e_cryptolocker.exe	asih.exe
PID 3044 wrote to memory of 2236	3044	2024-02-12_cc6ded129f4a2112d3872e5ed64dbc5e_cryptolocker.exe	asih.exe
PID 3044 wrote to memory of 2236	3044	2024-02-12_cc6ded129f4a2112d3872e5ed64dbc5e_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-02-12_cc6ded129f4a2112d3872e5ed64dbc5e_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-12_cc6ded129f4a2112d3872e5ed64dbc5e_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:3044

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:2236

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
57KB

MD5
1f3df8f49e0df37b6836dd23dbccd5b1

SHA1
f72e11f2e7188d3c221964e3e5084bff6ce7320b

SHA256
c9241331f655e9749919d2b4da1fe41c81d8bb1a284f2260b600f898b3e20ba0

SHA512
6407e6baebaba9d1e35e83f7cfd6121e5ce0b355ad8d9dc2c0995fef9330d19de3f6d5d34c3af9106e01433e80285209bf3c0d456b1a6817ee001e64dcc11a2d

Download Submit
memory/2236-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2236-19-0x0000000000360000-0x0000000000366000-memory.dmp

Filesize
24KB

Download
memory/2236-21-0x00000000002B0000-0x00000000002B6000-memory.dmp

Filesize
24KB

Download
memory/2236-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3044-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3044-1-0x00000000001C0000-0x00000000001C6000-memory.dmp

Filesize
24KB

Download
memory/3044-3-0x00000000003E0000-0x00000000003E6000-memory.dmp

Filesize
24KB

Download
memory/3044-2-0x00000000001C0000-0x00000000001C6000-memory.dmp

Filesize
24KB

Download
memory/3044-15-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3044-14-0x0000000002800000-0x0000000002810000-memory.dmp

Filesize
64KB

Download