ac3df1a34c08b948ba9ba59c29e8608007d1dd9ccf0edb13ec163c2f07274e7d

Analysis

max time kernel
148s
max time network
150s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
22-05-2024 23:23

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General

Target

2024-05-22_25edd43f54612e7e9f2ae024bb6dbbba_cryptolocker.exe
Size

57KB
MD5

25edd43f54612e7e9f2ae024bb6dbbba
SHA1

4dd88058ad4829f9ec1ea22837b36915c10817c8
SHA256

ac3df1a34c08b948ba9ba59c29e8608007d1dd9ccf0edb13ec163c2f07274e7d
SHA512

9ad0753877984d603826da4c397c5f1f236ff493e838da3b356e1919c7d78e9b2fc7bbf6c5d4c9003430c7becbc7d5011261cacb93b46f6b90c5ea453acfb9d1
SSDEEP

1536:qmbhXDmjr5MOtEvwDpj5cDtKkQZQRKb6ImpyR:BbdDmjr+OtEvwDpjM+

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2308-1-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral1/memory/2308-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2944-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2944-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 3 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2308-1-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2308-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2944-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2308-1-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral1/memory/2308-16-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2944-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2944-27-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

2944 asih.exe
Loads dropped DLL 1 IoCs

Processes:

2024-05-22_25edd43f54612e7e9f2ae024bb6dbbba_cryptolocker.exe

pid process

2308 2024-05-22_25edd43f54612e7e9f2ae024bb6dbbba_cryptolocker.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
2944	asih.exe

pid	process
2308	2024-05-22_25edd43f54612e7e9f2ae024bb6dbbba_cryptolocker.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

2024-05-22_25edd43f54612e7e9f2ae024bb6dbbba_cryptolocker.exe

description	pid	process	target process
PID 2308 wrote to memory of 2944	2308	2024-05-22_25edd43f54612e7e9f2ae024bb6dbbba_cryptolocker.exe	asih.exe
PID 2308 wrote to memory of 2944	2308	2024-05-22_25edd43f54612e7e9f2ae024bb6dbbba_cryptolocker.exe	asih.exe
PID 2308 wrote to memory of 2944	2308	2024-05-22_25edd43f54612e7e9f2ae024bb6dbbba_cryptolocker.exe	asih.exe
PID 2308 wrote to memory of 2944	2308	2024-05-22_25edd43f54612e7e9f2ae024bb6dbbba_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-22_25edd43f54612e7e9f2ae024bb6dbbba_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-22_25edd43f54612e7e9f2ae024bb6dbbba_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2308

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:2944

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

\Users\Admin\AppData\Local\Temp\asih.exe
Filesize
57KB

MD5
b4d4f1f2db17df17f750aa6c8127bf04

SHA1
fa1f1dd2aad68bdbce8afe4d0ec7b344ef1a3ab2

SHA256
20b2d0e61d60557914b66b2bbcf55d217c820cd579b371857a10a931cf9e4da2

SHA512
bbdebb1d5d49e3dae8e8a9837345228ee8cd9123f5605b221bfbf07e4f00af4b896d6e9557345c595e7d00b90d557d7fc388a371f1fd9cd19dc384a16a17b499

Download Submit
memory/2308-0-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2308-1-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2308-2-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2308-3-0x0000000000480000-0x0000000000486000-memory.dmp

Filesize
24KB

Download
memory/2308-16-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2944-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2944-19-0x0000000000470000-0x0000000000476000-memory.dmp

Filesize
24KB

Download
memory/2944-26-0x0000000000430000-0x0000000000436000-memory.dmp

Filesize
24KB

Download
memory/2944-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download