aa35b43ca6a4034c2d1b8352a6e0ce57bdc6b858b9ac471d77c947d12a3ac389

General

Target

2024-05-22_ba2cab45be7ebccb0516b4722fbc5b07_cryptolocker.exe
Size

66KB
MD5

ba2cab45be7ebccb0516b4722fbc5b07
SHA1

583fbde73f02d5ea54866ff1858f1021ae8261c3
SHA256

aa35b43ca6a4034c2d1b8352a6e0ce57bdc6b858b9ac471d77c947d12a3ac389
SHA512

09050d7713245b5248d26eabaeae002730954fb6018a8dfd67c53bca459756fa72a96ade0a5eddf8f814ccd5f6ea8aefe4572bb0bcbc0878050c001d8c699fca
SSDEEP

1536:P8mnK6QFElP6n+gymddpMOtEvwDpjYibAoQRv:1nK6a+qdOOtEvwDpjm

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 6 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2896-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral1/memory/2896-13-0x00000000004F0000-0x0000000000500000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2368-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2896-16-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2368-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 6 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2896-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral1/memory/2896-13-0x00000000004F0000-0x0000000000500000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2368-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral1/memory/2896-16-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral1/memory/2368-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 6 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2896-0-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral1/memory/2896-13-0x00000000004F0000-0x0000000000500000-memory.dmp	UPX
behavioral1/memory/2368-17-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral1/memory/2896-16-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral1/memory/2368-26-0x0000000000500000-0x000000000050F311-memory.dmp	UPX

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

2368 asih.exe
Loads dropped DLL 1 IoCs

Processes:

2024-05-22_ba2cab45be7ebccb0516b4722fbc5b07_cryptolocker.exe

pid process

2896 2024-05-22_ba2cab45be7ebccb0516b4722fbc5b07_cryptolocker.exe

pid	process
2368	asih.exe

pid	process
2896	2024-05-22_ba2cab45be7ebccb0516b4722fbc5b07_cryptolocker.exe

UPX packed file 6 IoCs

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

upx

Processes:

resource	yara_rule
behavioral1/memory/2896-0-0x0000000000500000-0x000000000050F311-memory.dmp	upx
\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral1/memory/2896-13-0x00000000004F0000-0x0000000000500000-memory.dmp	upx
behavioral1/memory/2368-17-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral1/memory/2896-16-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral1/memory/2368-26-0x0000000000500000-0x000000000050F311-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:

2024-05-22_ba2cab45be7ebccb0516b4722fbc5b07_cryptolocker.exe

description	pid	process	target process
PID 2896 wrote to memory of 2368	2896	2024-05-22_ba2cab45be7ebccb0516b4722fbc5b07_cryptolocker.exe	asih.exe
PID 2896 wrote to memory of 2368	2896	2024-05-22_ba2cab45be7ebccb0516b4722fbc5b07_cryptolocker.exe	asih.exe
PID 2896 wrote to memory of 2368	2896	2024-05-22_ba2cab45be7ebccb0516b4722fbc5b07_cryptolocker.exe	asih.exe
PID 2896 wrote to memory of 2368	2896	2024-05-22_ba2cab45be7ebccb0516b4722fbc5b07_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-22_ba2cab45be7ebccb0516b4722fbc5b07_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-22_ba2cab45be7ebccb0516b4722fbc5b07_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2896
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2368

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

\Users\Admin\AppData\Local\Temp\asih.exe

Filesize
67KB

MD5
45838a310c8ddb59c185242cbfb58824

SHA1
c0c17d62226bf92e60cf60f258660192fe06e766

SHA256
4109dfa7b478e9e43a88c81e5aa53c18630a295bd5de65553cd250d85a2d96b9

SHA512
199e5425aeb75cf497ec9494a69bae7a936695200d78c5cb7c83c83017a49814f214b5581c9b8f3f4a3c8c128a733548617089542864977935ae0a8d754ff3c3

Download Submit
memory/2368-17-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/2368-19-0x0000000000290000-0x0000000000296000-memory.dmp

Filesize
24KB

Download
memory/2368-26-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/2896-0-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/2896-1-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2896-2-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2896-3-0x0000000000280000-0x0000000000286000-memory.dmp

Filesize
24KB

Download
memory/2896-13-0x00000000004F0000-0x0000000000500000-memory.dmp

Filesize
64KB

Download
memory/2896-16-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads