4c823988b548f47ca28ab5f06d47f52f24634c4c483fc745cf5f40434146cb70

Analysis

max time kernel
148s
max time network
149s
platform
windows7_x64
resource
win7-20240220-en
resource tags

arch:x64arch:x86image:win7-20240220-enlocale:en-usos:windows7-x64system
submitted
22-05-2024 02:36

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General

Target

2024-05-22_dfa1fa3c1d66d405aff948dc520176c3_cryptolocker.exe
Size

40KB
MD5

dfa1fa3c1d66d405aff948dc520176c3
SHA1

f8d44238d465d62723d47addfdc90f03ea906445
SHA256

4c823988b548f47ca28ab5f06d47f52f24634c4c483fc745cf5f40434146cb70
SHA512

b3cb104e8d296fb1d2e8b590d369a573489b7316061c5a0e7307fe433cafe4b90022773c8fffb7b6214321d1ab5211c9cd0af08b2a6008b41b22faa29864a120
SSDEEP

768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITYV:qDdFJy3QMOtEvwDpjjWMl7Tg

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2860-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral1/memory/2860-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/3024-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2860-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral1/memory/2860-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/3024-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2860-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral1/memory/2860-16-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/3024-26-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

3024 asih.exe
Loads dropped DLL 1 IoCs

Processes:

2024-05-22_dfa1fa3c1d66d405aff948dc520176c3_cryptolocker.exe

pid process

2860 2024-05-22_dfa1fa3c1d66d405aff948dc520176c3_cryptolocker.exe

pid	process
3024	asih.exe

pid	process
2860	2024-05-22_dfa1fa3c1d66d405aff948dc520176c3_cryptolocker.exe

UPX packed file 4 IoCs

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

upx

Processes:

resource	yara_rule
behavioral1/memory/2860-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral1/memory/2860-16-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/3024-26-0x0000000000500000-0x0000000000510000-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:

2024-05-22_dfa1fa3c1d66d405aff948dc520176c3_cryptolocker.exe

description	pid	process	target process
PID 2860 wrote to memory of 3024	2860	2024-05-22_dfa1fa3c1d66d405aff948dc520176c3_cryptolocker.exe	asih.exe
PID 2860 wrote to memory of 3024	2860	2024-05-22_dfa1fa3c1d66d405aff948dc520176c3_cryptolocker.exe	asih.exe
PID 2860 wrote to memory of 3024	2860	2024-05-22_dfa1fa3c1d66d405aff948dc520176c3_cryptolocker.exe	asih.exe
PID 2860 wrote to memory of 3024	2860	2024-05-22_dfa1fa3c1d66d405aff948dc520176c3_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-22_dfa1fa3c1d66d405aff948dc520176c3_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-22_dfa1fa3c1d66d405aff948dc520176c3_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:3024

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

\Users\Admin\AppData\Local\Temp\asih.exe
Filesize
40KB

MD5
121fbe3687b70905c52a6ee572925355

SHA1
0939bffd8db0a09ffd9561bfc819be81d9bd8561

SHA256
d850dff677e0ae297ff787730adcfe107c43e65ed2d6da3937899730238297c2

SHA512
b761f2dcef7739615b402bd4e8ac6806ebd6fd5a427f7ed706d39a599be7c3c34bb8f22ed532800bf4f37751dfa7fd577b21dd2e627a5975582237036c0383bc

Download Submit
memory/2860-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2860-1-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2860-2-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2860-3-0x0000000000280000-0x0000000000286000-memory.dmp

Filesize
24KB

Download
memory/2860-16-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3024-18-0x0000000000290000-0x0000000000296000-memory.dmp

Filesize
24KB

Download
memory/3024-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3024-25-0x0000000000250000-0x0000000000256000-memory.dmp

Filesize
24KB

Download