311d89e6bdd910da6d9d79fd3b6dc0b4aa6ec85286d6159ca4ad1f99c56a1163

General

Target

2024-02-12_3f21117a15f199a3e13062bd7d3f01e2_cryptolocker.exe
Size

63KB
MD5

3f21117a15f199a3e13062bd7d3f01e2
SHA1

d5701e7ebaa747739c8aff2a73d966d33364a8e9
SHA256

311d89e6bdd910da6d9d79fd3b6dc0b4aa6ec85286d6159ca4ad1f99c56a1163
SHA512

8ef748853cc5be12df7f2219d35c053319635e30822782f917d9fdfa7c6b2ad1d0dce87ac045feb536d4721fe45625ca1b535a9c9abea97dfcc7395e69beaff4
SSDEEP

768:T6LsoEEeegiZPvEhHSG+gkum/kLyMro2GtOOtEvwDpjhXMLamkc8J5hRXq/:T6QFElP6n+gxmddpMOtEvwDpjwa3nS

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2084-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2084-14-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral1/memory/1436-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/1436-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2084-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2084-14-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral1/memory/1436-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/1436-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2084-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2084-14-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral1/memory/1436-16-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/1436-26-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

1436 asih.exe
Loads dropped DLL 1 IoCs

Processes:

2024-02-12_3f21117a15f199a3e13062bd7d3f01e2_cryptolocker.exe

pid process

2084 2024-02-12_3f21117a15f199a3e13062bd7d3f01e2_cryptolocker.exe

pid	process
1436	asih.exe

pid	process
2084	2024-02-12_3f21117a15f199a3e13062bd7d3f01e2_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

Processes:

resource	yara_rule
behavioral1/memory/2084-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2084-14-0x0000000000500000-0x0000000000510000-memory.dmp	upx
\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral1/memory/1436-16-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/1436-26-0x0000000000500000-0x0000000000510000-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:

2024-02-12_3f21117a15f199a3e13062bd7d3f01e2_cryptolocker.exe

description	pid	process	target process
PID 2084 wrote to memory of 1436	2084	2024-02-12_3f21117a15f199a3e13062bd7d3f01e2_cryptolocker.exe	asih.exe
PID 2084 wrote to memory of 1436	2084	2024-02-12_3f21117a15f199a3e13062bd7d3f01e2_cryptolocker.exe	asih.exe
PID 2084 wrote to memory of 1436	2084	2024-02-12_3f21117a15f199a3e13062bd7d3f01e2_cryptolocker.exe	asih.exe
PID 2084 wrote to memory of 1436	2084	2024-02-12_3f21117a15f199a3e13062bd7d3f01e2_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-02-12_3f21117a15f199a3e13062bd7d3f01e2_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-12_3f21117a15f199a3e13062bd7d3f01e2_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2084

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:1436

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

\Users\Admin\AppData\Local\Temp\asih.exe

Filesize
63KB

MD5
d0fb6748d93262e83889b90dd991f330

SHA1
e443ecded913af85f5e18eaff75d930a7a2d65db

SHA256
2df308e75b8fdd42f8b3dd3a0543459492ece366718f1382fd03b89f765b0d24

SHA512
bbbcef2063da0b8ac02ae08f1e9a9faf96fd007631a87fb7e27d5d713b09326dc0ce57484bf49a67600f53143ae8317502b040deb9f558ead6e314fa4c9ad211

Download Submit
memory/1436-16-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1436-18-0x0000000000350000-0x0000000000356000-memory.dmp

Filesize
24KB

Download
memory/1436-19-0x0000000000480000-0x0000000000486000-memory.dmp

Filesize
24KB

Download
memory/1436-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2084-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2084-1-0x0000000000420000-0x0000000000426000-memory.dmp

Filesize
24KB

Download
memory/2084-3-0x0000000000420000-0x0000000000426000-memory.dmp

Filesize
24KB

Download
memory/2084-2-0x0000000000450000-0x0000000000456000-memory.dmp

Filesize
24KB

Download
memory/2084-14-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads