f7c3dfa12b25de93ef2855cbe051ce717681dd62f38c3b896a48215aa9e5ce6e

Analysis

max time kernel
148s
max time network
153s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
22/05/2024, 22:31

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General

Target

2024-05-22_97d572bf1217b39e61c5475f4f996d87_cryptolocker.exe
Size

79KB
MD5

97d572bf1217b39e61c5475f4f996d87
SHA1

72e15b7d4a54cc30d130e8adfe4a2f5a1891f68b
SHA256

f7c3dfa12b25de93ef2855cbe051ce717681dd62f38c3b896a48215aa9e5ce6e
SHA512

4cb390bfa82d2933b6d3d74ebfe113274d82149d73ff4b5c62437ec754229f6462d5b0f3fad1494adc07256ed9788772849916a4cff0a49a5f0f34e06246d095
SSDEEP

1536:T6QFElP6n+gxmddpMOtEvwDpjwaxTNUOAkXtBdxPUxB1U:T6a+rdOOtEvwDpjNtHP/

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral1/memory/1284-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000b000000014e3d-11.dat	CryptoLocker_rule2
behavioral1/memory/2568-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/1284-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2568-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral1/memory/1284-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/files/0x000b000000014e3d-11.dat	CryptoLocker_set1
behavioral1/memory/2568-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/1284-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2568-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral1/memory/1284-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/files/0x000b000000014e3d-11.dat	UPX
behavioral1/memory/2568-16-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/1284-15-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2568-26-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2568	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
1284	2024-05-22_97d572bf1217b39e61c5475f4f996d87_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/1284-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/files/0x000b000000014e3d-11.dat	upx
behavioral1/memory/2568-16-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/1284-15-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2568-26-0x0000000000500000-0x0000000000510000-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

description	pid	Process	procid_target
PID 1284 wrote to memory of 2568	1284	2024-05-22_97d572bf1217b39e61c5475f4f996d87_cryptolocker.exe	28
PID 1284 wrote to memory of 2568	1284	2024-05-22_97d572bf1217b39e61c5475f4f996d87_cryptolocker.exe	28
PID 1284 wrote to memory of 2568	1284	2024-05-22_97d572bf1217b39e61c5475f4f996d87_cryptolocker.exe	28
PID 1284 wrote to memory of 2568	1284	2024-05-22_97d572bf1217b39e61c5475f4f996d87_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-05-22_97d572bf1217b39e61c5475f4f996d87_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-22_97d572bf1217b39e61c5475f4f996d87_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1284
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2568

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
79KB

MD5
663f27d597a89ae19da26187e293e0fb

SHA1
ee84b5d53ef9f59f6125f93b2717a6c69a16b131

SHA256
68ec8d1e335189635c97d4bc988ed1f8daca28afcac00548d46dfb851e12dc64

SHA512
fd562ab9e26c2cb9aaba7954ef318789a0a541d188c8af2950d42c2bff9a7ecece95e9389d430d54bd652df4cd31a73efdc0e0007912e59c4c205223900d9640

Download Submit
memory/1284-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1284-1-0x0000000000250000-0x0000000000256000-memory.dmp

Filesize
24KB

Download
memory/1284-2-0x00000000004B0000-0x00000000004B6000-memory.dmp

Filesize
24KB

Download
memory/1284-9-0x0000000000250000-0x0000000000256000-memory.dmp

Filesize
24KB

Download
memory/1284-15-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2568-16-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2568-18-0x00000000002F0000-0x00000000002F6000-memory.dmp

Filesize
24KB

Download
memory/2568-25-0x00000000002C0000-0x00000000002C6000-memory.dmp

Filesize
24KB

Download
memory/2568-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download