75a58ead3c9fb96db4d869178fc964e330995899b2683229e164906f0c5f0fbd

Analysis

max time kernel
148s
max time network
149s
platform
windows7_x64
resource
win7-20240215-en
resource tags

arch:x64arch:x86image:win7-20240215-enlocale:en-usos:windows7-x64system
submitted
22-05-2024 02:31

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General

Target

2024-05-22_49a642ce80c19129ea221f1d4bc9315e_cryptolocker.exe
Size

77KB
MD5

49a642ce80c19129ea221f1d4bc9315e
SHA1

e12c7937d17dce49e8ce88ca76cb238db08b7daa
SHA256

75a58ead3c9fb96db4d869178fc964e330995899b2683229e164906f0c5f0fbd
SHA512

94a2d92a58850b56685c5e90b06287e1ae5d8293083faf608b6ff76cf122b874a26b29b7ecaf84bd1549e561e721fb7549aac6be923c5cfd56d7d85374239f25
SSDEEP

1536:T6QFElP6n+gxmddpMOtEvwDpjwaxTNUOAkXtBdxPUxB1d:T6a+rdOOtEvwDpjNtHPi

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

Processes:

resource	yara_rule
behavioral1/memory/764-8-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral1/memory/2852-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2852-25-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

Processes:

resource	yara_rule
behavioral1/memory/764-8-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral1/memory/2852-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2852-25-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

Processes:

resource	yara_rule
behavioral1/memory/764-8-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral1/memory/2852-15-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2852-25-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

2852 asih.exe
Loads dropped DLL 1 IoCs

Processes:

2024-05-22_49a642ce80c19129ea221f1d4bc9315e_cryptolocker.exe

pid process

764 2024-05-22_49a642ce80c19129ea221f1d4bc9315e_cryptolocker.exe

pid	process
2852	asih.exe

pid	process
764	2024-05-22_49a642ce80c19129ea221f1d4bc9315e_cryptolocker.exe

UPX packed file 4 IoCs

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

upx

Processes:

resource	yara_rule
behavioral1/memory/764-8-0x0000000000500000-0x0000000000510000-memory.dmp	upx
\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral1/memory/2852-15-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2852-25-0x0000000000500000-0x0000000000510000-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

Processes:

2024-05-22_49a642ce80c19129ea221f1d4bc9315e_cryptolocker.exe

description	pid	process	target process
PID 764 wrote to memory of 2852	764	2024-05-22_49a642ce80c19129ea221f1d4bc9315e_cryptolocker.exe	asih.exe
PID 764 wrote to memory of 2852	764	2024-05-22_49a642ce80c19129ea221f1d4bc9315e_cryptolocker.exe	asih.exe
PID 764 wrote to memory of 2852	764	2024-05-22_49a642ce80c19129ea221f1d4bc9315e_cryptolocker.exe	asih.exe
PID 764 wrote to memory of 2852	764	2024-05-22_49a642ce80c19129ea221f1d4bc9315e_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-22_49a642ce80c19129ea221f1d4bc9315e_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-22_49a642ce80c19129ea221f1d4bc9315e_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:764

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:2852

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
77KB

MD5
70d492784927c4a7fd6984096fb4ae1b

SHA1
298ac5f28b4178d1a131155670cbc44ca8026197

SHA256
605a0167341d1efd933eed971a1a1ddfdd0ea03156c207a4805e3a20579f5ee3

SHA512
9dd1ec8e6c7e76f9f1a53f6f002b851cbe68879e8853b9a22cfc504a72eb364777a15c2f9963756146c2cb633054ea7bcb87801de04e820e83bebc7b7d6029a2

Download Submit
memory/764-0-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/764-9-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/764-8-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/764-1-0x00000000004A0000-0x00000000004A6000-memory.dmp

Filesize
24KB

Download
memory/2852-15-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2852-17-0x00000000020B0000-0x00000000020B6000-memory.dmp

Filesize
24KB

Download
memory/2852-24-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/2852-25-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download