f4f83cb0f32ed8825c775ccc9f7127c446b1b5afaf7e8c540ae518767c455435

General

Target

2024-05-22_c451fdde13b02fa7c73df943bf248b32_cryptolocker.exe
Size

74KB
MD5

c451fdde13b02fa7c73df943bf248b32
SHA1

fd89786bd8fd47ad82b019190fafc1b47c85fce9
SHA256

f4f83cb0f32ed8825c775ccc9f7127c446b1b5afaf7e8c540ae518767c455435
SHA512

44b5575d7ed3fda40aad537c58dc9b54673597f86aebfad7a9ed542fce6afc433677ea049c4332a7a75c4695a39f2559e94918aeb6946e63601dce5e0540e2db
SSDEEP

1536:P8mnK6QFElP6n+gymddpMOtEvwDpjIHsal81GH:1nK6a+qdOOtEvwDpjm

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2860-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral1/memory/2116-16-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2860-15-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2116-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2860-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral1/memory/2116-16-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral1/memory/2860-15-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral1/memory/2116-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2860-0-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral1/memory/2116-16-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral1/memory/2860-15-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral1/memory/2116-26-0x0000000000500000-0x000000000050F311-memory.dmp	UPX

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

2116 asih.exe
Loads dropped DLL 1 IoCs

Processes:

2024-05-22_c451fdde13b02fa7c73df943bf248b32_cryptolocker.exe

pid process

2860 2024-05-22_c451fdde13b02fa7c73df943bf248b32_cryptolocker.exe

pid	process
2116	asih.exe

pid	process
2860	2024-05-22_c451fdde13b02fa7c73df943bf248b32_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

Processes:

resource	yara_rule
behavioral1/memory/2860-0-0x0000000000500000-0x000000000050F311-memory.dmp	upx
\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral1/memory/2116-16-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral1/memory/2860-15-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral1/memory/2116-26-0x0000000000500000-0x000000000050F311-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_c451fdde13b02fa7c73df943bf248b32_cryptolocker.exe

description	pid	process	target process
PID 2860 wrote to memory of 2116	2860	2024-05-22_c451fdde13b02fa7c73df943bf248b32_cryptolocker.exe	asih.exe
PID 2860 wrote to memory of 2116	2860	2024-05-22_c451fdde13b02fa7c73df943bf248b32_cryptolocker.exe	asih.exe
PID 2860 wrote to memory of 2116	2860	2024-05-22_c451fdde13b02fa7c73df943bf248b32_cryptolocker.exe	asih.exe
PID 2860 wrote to memory of 2116	2860	2024-05-22_c451fdde13b02fa7c73df943bf248b32_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-22_c451fdde13b02fa7c73df943bf248b32_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-22_c451fdde13b02fa7c73df943bf248b32_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2860

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:2116

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

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Downloads

\Users\Admin\AppData\Local\Temp\asih.exe
Filesize
74KB

MD5
b2e04e03f244697e0310296da1f7b57f

SHA1
e19d985bd1ad142c17b107626c51a41310fd66ac

SHA256
a0829f2771b047bdfcbd283ca4c817916e57ace51cc81857a32f6761eacc42c3

SHA512
7b212085b297f91dbc90b721b587b6e14821fd63e688d90b1dbc4fc48fcde466540460fcadf425323863722631164624778f85d32e26df2ec0119a6ff81cf746

Download Submit
memory/2116-16-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/2116-25-0x00000000001D0000-0x00000000001D6000-memory.dmp

Filesize
24KB

Download
memory/2116-18-0x00000000002A0000-0x00000000002A6000-memory.dmp

Filesize
24KB

Download
memory/2116-26-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/2860-0-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/2860-1-0x00000000002C0000-0x00000000002C6000-memory.dmp

Filesize
24KB

Download
memory/2860-2-0x0000000000460000-0x0000000000466000-memory.dmp

Filesize
24KB

Download
memory/2860-9-0x00000000002C0000-0x00000000002C6000-memory.dmp

Filesize
24KB

Download
memory/2860-15-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads