b1767aa87b0feb95b533470a89c309da05461467700d646de151df56eaa5d89d

Analysis

max time kernel
148s
max time network
148s
platform
windows7_x64
resource
win7-20231129-en
resource tags

arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
submitted
25-01-2024 17:41

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General

Target

2024-01-25_ef82d30cbd5d823168cc1ae928547faf_cryptolocker.exe
Size

50KB
MD5

ef82d30cbd5d823168cc1ae928547faf
SHA1

d23d27b66660546c8108debcd6cb835043a9e828
SHA256

b1767aa87b0feb95b533470a89c309da05461467700d646de151df56eaa5d89d
SHA512

a1cf52d1a6be7ce7a6f36811ad1c947615f27ff8913ddd10e31cab424157afe903b4f9aed9bd01aff01a187d6cae9fd923960f2534a86f4e1494333dc6705020
SSDEEP

768:79inqyNR/QtOOtEvwDpjBK/rJ+Nw8qn8pKIRd:79mqyNhQMOtEvwDpjBxe8TpXRd

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1704-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral1/memory/1704-15-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/1764-19-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1704-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral1/memory/1704-15-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/memory/1764-19-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

1764 asih.exe
Loads dropped DLL 1 IoCs

Processes:

2024-01-25_ef82d30cbd5d823168cc1ae928547faf_cryptolocker.exe

pid process

1704 2024-01-25_ef82d30cbd5d823168cc1ae928547faf_cryptolocker.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
1764	asih.exe

pid	process
1704	2024-01-25_ef82d30cbd5d823168cc1ae928547faf_cryptolocker.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

2024-01-25_ef82d30cbd5d823168cc1ae928547faf_cryptolocker.exe

description	pid	process	target process
PID 1704 wrote to memory of 1764	1704	2024-01-25_ef82d30cbd5d823168cc1ae928547faf_cryptolocker.exe	asih.exe
PID 1704 wrote to memory of 1764	1704	2024-01-25_ef82d30cbd5d823168cc1ae928547faf_cryptolocker.exe	asih.exe
PID 1704 wrote to memory of 1764	1704	2024-01-25_ef82d30cbd5d823168cc1ae928547faf_cryptolocker.exe	asih.exe
PID 1704 wrote to memory of 1764	1704	2024-01-25_ef82d30cbd5d823168cc1ae928547faf_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-01-25_ef82d30cbd5d823168cc1ae928547faf_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-01-25_ef82d30cbd5d823168cc1ae928547faf_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1704

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:1764

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
50KB

MD5
b09970ae0a18ab9186d24e0b8164def0

SHA1
8b785b52de434620838ca26098a02e12391d86d5

SHA256
02ea9b3626ce59f29b46e70d85519d6b80c4fcee77d10308a06aed1a66fa1346

SHA512
5ac5064e8dd2756bcef5c89eb643d240d3af6c575e827b62abdf071caabdbc876f8e8b319ed96c7b56e9a6e34bfdff71cf232f75d76a6bcd48cb1cc51d380ca2

Download Submit
memory/1704-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/1704-1-0x00000000001D0000-0x00000000001D6000-memory.dmp

Filesize
24KB

Download
memory/1704-2-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/1704-8-0x00000000001D0000-0x00000000001D6000-memory.dmp

Filesize
24KB

Download
memory/1704-15-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/1704-16-0x0000000002220000-0x000000000222F000-memory.dmp

Filesize
60KB

Download
memory/1764-19-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/1764-21-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/1764-18-0x0000000000310000-0x0000000000316000-memory.dmp

Filesize
24KB

Download