1ebd2d0ab3604a34190578551a008aa481fc9659868af22e7a7894894bdc9471

Analysis

max time kernel
149s
max time network
154s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
21-05-2024 16:04

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General

Target

2024-05-21_e876d7dda0a13c369e2cbf256453329b_cryptolocker.exe
Size

48KB
MD5

e876d7dda0a13c369e2cbf256453329b
SHA1

3cfd13b5b2736140d11073bbb24e0f4461d0cf0f
SHA256

1ebd2d0ab3604a34190578551a008aa481fc9659868af22e7a7894894bdc9471
SHA512

d3c8ba1cfd8c032dba6b4527df9830eaf8518d773e9f6e743a539146b4be998ccd56ede4d1e6ae924ab80d01e00f37005cd1b61e9bfb7d25b2e94ee505070ea7
SSDEEP

768:qmOKYQDf5XdrDmjr5tOOtEvwDpjAajFEitQbDmoSQCVUBJUkQqAHBIG05W2MoL5c:qmbhXDmjr5MOtEvwDpj5cDtKkQZQVe

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2656-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral1/memory/2632-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2656-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2632-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 2 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2656-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2632-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2656-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral1/memory/2632-16-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2656-15-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2632-26-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

2632 asih.exe
Loads dropped DLL 1 IoCs

Processes:

2024-05-21_e876d7dda0a13c369e2cbf256453329b_cryptolocker.exe

pid process

2656 2024-05-21_e876d7dda0a13c369e2cbf256453329b_cryptolocker.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
2632	asih.exe

pid	process
2656	2024-05-21_e876d7dda0a13c369e2cbf256453329b_cryptolocker.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

2024-05-21_e876d7dda0a13c369e2cbf256453329b_cryptolocker.exe

description	pid	process	target process
PID 2656 wrote to memory of 2632	2656	2024-05-21_e876d7dda0a13c369e2cbf256453329b_cryptolocker.exe	asih.exe
PID 2656 wrote to memory of 2632	2656	2024-05-21_e876d7dda0a13c369e2cbf256453329b_cryptolocker.exe	asih.exe
PID 2656 wrote to memory of 2632	2656	2024-05-21_e876d7dda0a13c369e2cbf256453329b_cryptolocker.exe	asih.exe
PID 2656 wrote to memory of 2632	2656	2024-05-21_e876d7dda0a13c369e2cbf256453329b_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-21_e876d7dda0a13c369e2cbf256453329b_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-21_e876d7dda0a13c369e2cbf256453329b_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2656

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:2632

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
48KB

MD5
8a9e617b18c6222252dce95611a0ecaf

SHA1
8c1a409f2775aa07b475403eee32b3b0e0e1bd62

SHA256
1fa194e5b48a7d8d0a104878e4a8af3d38f1196d4a01b6c3266fd4e8081fcebc

SHA512
61023f45dbfc76d337fe87961e245db13d4dde4b67b568cc1d87aab0fcb1d62840f5b9a3ef55db3a20a040e8879494e1a3ed77c727254f0cce7941031036c66f

Download Submit
memory/2632-16-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2632-25-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2632-18-0x0000000000270000-0x0000000000276000-memory.dmp

Filesize
24KB

Download
memory/2632-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2656-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2656-1-0x0000000000250000-0x0000000000256000-memory.dmp

Filesize
24KB

Download
memory/2656-9-0x0000000000250000-0x0000000000256000-memory.dmp

Filesize
24KB

Download
memory/2656-2-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/2656-15-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download