4c72fefce81c758c0293daf045fae31837a9a932b5a2a343c655bc3c755db5ea

Analysis

max time kernel
149s
max time network
155s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
27-04-2024 22:35

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General

Target

2024-04-27_8a0a0ce92797e3559d112769d1b3375e_cryptolocker.exe
Size

87KB
MD5

8a0a0ce92797e3559d112769d1b3375e
SHA1

cf02b22ef91a699d225de274941bc0d0000ae8a0
SHA256

4c72fefce81c758c0293daf045fae31837a9a932b5a2a343c655bc3c755db5ea
SHA512

12cb656044be4a5ca7e84ba7391a29952fb1de91eb618cef6c0e7a87c6ff891c2661037955be2a7460e7ab5cf3aad23555c6dcdec9619319daef3465e8ff82dc
SSDEEP

1536:qkmnpomddpMOtEvwDpjJGYQbN/PKwMg5D:AnBdOOtEvwDpj6zp

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2304-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral1/memory/2304-16-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2784-27-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2304-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral1/memory/2304-16-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2784-27-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2304-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral1/memory/2304-16-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral1/memory/2784-27-0x0000000000500000-0x000000000050F000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

2784 asih.exe
Loads dropped DLL 1 IoCs

Processes:

2024-04-27_8a0a0ce92797e3559d112769d1b3375e_cryptolocker.exe

pid process

2304 2024-04-27_8a0a0ce92797e3559d112769d1b3375e_cryptolocker.exe

pid	process
2784	asih.exe

pid	process
2304	2024-04-27_8a0a0ce92797e3559d112769d1b3375e_cryptolocker.exe

UPX packed file 4 IoCs

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

upx

Processes:

resource	yara_rule
behavioral1/memory/2304-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral1/memory/2304-16-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral1/memory/2784-27-0x0000000000500000-0x000000000050F000-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:

2024-04-27_8a0a0ce92797e3559d112769d1b3375e_cryptolocker.exe

description	pid	process	target process
PID 2304 wrote to memory of 2784	2304	2024-04-27_8a0a0ce92797e3559d112769d1b3375e_cryptolocker.exe	asih.exe
PID 2304 wrote to memory of 2784	2304	2024-04-27_8a0a0ce92797e3559d112769d1b3375e_cryptolocker.exe	asih.exe
PID 2304 wrote to memory of 2784	2304	2024-04-27_8a0a0ce92797e3559d112769d1b3375e_cryptolocker.exe	asih.exe
PID 2304 wrote to memory of 2784	2304	2024-04-27_8a0a0ce92797e3559d112769d1b3375e_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-04-27_8a0a0ce92797e3559d112769d1b3375e_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-27_8a0a0ce92797e3559d112769d1b3375e_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2304

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:2784

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
87KB

MD5
2e675c36cfdceefe9a66e971f6db0211

SHA1
9a471217e5f5567b4371695fad61d45da1543661

SHA256
ccb4657d30eba53671b8f9686de78078e2f3b3a98b658780877633dc12b29aca

SHA512
274379e3f55be5a92837a81a6e6aedb65c2b257ae5468602e94413d0a1099805f63ea976e52ec9085aa79dfa09fe3d9d2a18021d26c12459edcbccb9821c4664

Download Submit
memory/2304-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2304-9-0x00000000004B0000-0x00000000004B6000-memory.dmp

Filesize
24KB

Download
memory/2304-2-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/2304-1-0x00000000004B0000-0x00000000004B6000-memory.dmp

Filesize
24KB

Download
memory/2304-17-0x0000000001EB0000-0x0000000001EBF000-memory.dmp

Filesize
60KB

Download
memory/2304-16-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2784-19-0x0000000000280000-0x0000000000286000-memory.dmp

Filesize
24KB

Download
memory/2784-26-0x00000000001D0000-0x00000000001D6000-memory.dmp

Filesize
24KB

Download
memory/2784-27-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download