8cac72bb4dfef748bd481de89cb32e8de1e57c5ff0994e65cad77659e53e2ecd

General

Target

2024-02-12_c305ee08c2c75c67aa3e146413119198_cryptolocker.exe
Size

126KB
MD5

c305ee08c2c75c67aa3e146413119198
SHA1

245841bdb458d6006b9fe8eacdabd49c43b8939b
SHA256

8cac72bb4dfef748bd481de89cb32e8de1e57c5ff0994e65cad77659e53e2ecd
SHA512

66b16806b39213b1a5d34e90fb9940ff954ba235a87c482cebbec7af7089c9e0f70d16e54c08448becd09cf83b26a664bd431e736c05fce25ddacd2d8e15557b
SSDEEP

1536:qkmnpomddpMOtEvwDpjJGYQbN/PKwNgp699GNtL1eInY:AnBdOOtEvwDpj6zV

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 6 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2900-1-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2900-14-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral1/memory/2284-18-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2284-27-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2900-29-0x0000000001FA0000-0x0000000001FAF000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 6 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2900-1-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2900-14-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral1/memory/2284-18-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2284-27-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2900-29-0x0000000001FA0000-0x0000000001FAF000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2900-1-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral1/memory/2900-14-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral1/memory/2284-18-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral1/memory/2284-27-0x0000000000500000-0x000000000050F000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

2284 asih.exe
Loads dropped DLL 1 IoCs

Processes:

2024-02-12_c305ee08c2c75c67aa3e146413119198_cryptolocker.exe

pid process

2900 2024-02-12_c305ee08c2c75c67aa3e146413119198_cryptolocker.exe

pid	process
2284	asih.exe

pid	process
2900	2024-02-12_c305ee08c2c75c67aa3e146413119198_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

Processes:

resource	yara_rule
behavioral1/memory/2900-1-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral1/memory/2900-14-0x0000000000500000-0x000000000050F000-memory.dmp	upx
\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral1/memory/2284-18-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral1/memory/2284-27-0x0000000000500000-0x000000000050F000-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_c305ee08c2c75c67aa3e146413119198_cryptolocker.exe

description	pid	process	target process
PID 2900 wrote to memory of 2284	2900	2024-02-12_c305ee08c2c75c67aa3e146413119198_cryptolocker.exe	asih.exe
PID 2900 wrote to memory of 2284	2900	2024-02-12_c305ee08c2c75c67aa3e146413119198_cryptolocker.exe	asih.exe
PID 2900 wrote to memory of 2284	2900	2024-02-12_c305ee08c2c75c67aa3e146413119198_cryptolocker.exe	asih.exe
PID 2900 wrote to memory of 2284	2900	2024-02-12_c305ee08c2c75c67aa3e146413119198_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-02-12_c305ee08c2c75c67aa3e146413119198_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-12_c305ee08c2c75c67aa3e146413119198_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2900

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:2284

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
126KB

MD5
43fb578f8f5acfa36c6b0f721022d5f9

SHA1
40bac0c34807aa1500144e30bf7bbfd9874e0f39

SHA256
7be9b022eea8ff518faa93bd50cab271a03bc04afb291b8ab1d737f48e447c98

SHA512
dec1cff96c7934aee60a86504875d51159accbc4424da5b98196af1830814a28ea8679a466780a6ecd46341bdfa00d16c8fa2fe3d826b201add339b19a9356bd

Download Submit
memory/2284-18-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2284-19-0x0000000000370000-0x0000000000376000-memory.dmp

Filesize
24KB

Download
memory/2284-24-0x0000000000340000-0x0000000000346000-memory.dmp

Filesize
24KB

Download
memory/2284-27-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2900-1-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2900-0-0x00000000001D0000-0x00000000001D6000-memory.dmp

Filesize
24KB

Download
memory/2900-2-0x0000000000210000-0x0000000000216000-memory.dmp

Filesize
24KB

Download
memory/2900-5-0x00000000001D0000-0x00000000001D6000-memory.dmp

Filesize
24KB

Download
memory/2900-14-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2900-16-0x0000000001FA0000-0x0000000001FAF000-memory.dmp

Filesize
60KB

Download
memory/2900-29-0x0000000001FA0000-0x0000000001FAF000-memory.dmp

Filesize
60KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads