4a3be337cf95c48c551d21e11532fcb4b6dbeb5670159b0d23ea9fb9cf04d2be

Analysis

max time kernel
148s
max time network
149s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
12-02-2024 17:45

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General

Target

2024-02-12_a24b19083c379be893b87045d5702c00_cryptolocker.exe
Size

31KB
MD5

a24b19083c379be893b87045d5702c00
SHA1

d187c6826702367336581c0b2b94fff9975ccab7
SHA256

4a3be337cf95c48c551d21e11532fcb4b6dbeb5670159b0d23ea9fb9cf04d2be
SHA512

8c78c206029c6d81a3eb037beaf55ff0bd2a4cca72cc8e00f5a25a2f38a15048936cca01ef179fe70b3a1980ccb933dd7408284fc7aa443fbd1a5d11a6ef774c
SSDEEP

768:q0ZziOWwULueOSdE8tOOtEvwDpjeWaJIOc+4tHd:q0zizzOSxMOtEvwDpj/arq9

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2400-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral1/memory/2400-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2088-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2088-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 3 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2400-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2088-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2088-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2400-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral1/memory/2400-15-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2088-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2088-26-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

2088 asih.exe
Loads dropped DLL 1 IoCs

Processes:

2024-02-12_a24b19083c379be893b87045d5702c00_cryptolocker.exe

pid process

2400 2024-02-12_a24b19083c379be893b87045d5702c00_cryptolocker.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
2088	asih.exe

pid	process
2400	2024-02-12_a24b19083c379be893b87045d5702c00_cryptolocker.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

2024-02-12_a24b19083c379be893b87045d5702c00_cryptolocker.exe

description	pid	process	target process
PID 2400 wrote to memory of 2088	2400	2024-02-12_a24b19083c379be893b87045d5702c00_cryptolocker.exe	asih.exe
PID 2400 wrote to memory of 2088	2400	2024-02-12_a24b19083c379be893b87045d5702c00_cryptolocker.exe	asih.exe
PID 2400 wrote to memory of 2088	2400	2024-02-12_a24b19083c379be893b87045d5702c00_cryptolocker.exe	asih.exe
PID 2400 wrote to memory of 2088	2400	2024-02-12_a24b19083c379be893b87045d5702c00_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-02-12_a24b19083c379be893b87045d5702c00_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-12_a24b19083c379be893b87045d5702c00_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2400

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:2088

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
31KB

MD5
c0ab8f0a1e877f0f660ba23c212cf063

SHA1
f2e9df633154fc3a88064f0e0cb77716a778f776

SHA256
8e66536b42914ce808d45b3386f921c48c39c48e1d1f08ebf85940c96b8bd2a7

SHA512
b8be65f8e982224e8b85030b4a673cc2116a092c07966a192ba08545acdc3a3de6536c8d29db18af1c5afd9519e2e7c3d146d75216dcf45edc924da86fa9af5b

Download Submit
memory/2088-18-0x0000000000460000-0x0000000000466000-memory.dmp

Filesize
24KB

Download
memory/2088-20-0x0000000000420000-0x0000000000426000-memory.dmp

Filesize
24KB

Download
memory/2088-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2088-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2400-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2400-1-0x0000000000460000-0x0000000000466000-memory.dmp

Filesize
24KB

Download
memory/2400-2-0x00000000004A0000-0x00000000004A6000-memory.dmp

Filesize
24KB

Download
memory/2400-8-0x0000000000460000-0x0000000000466000-memory.dmp

Filesize
24KB

Download
memory/2400-15-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download