5bd7dd930c539bf98f4c1d2e0f9d0552b5519c890eb5edcc363fde636921eaa4

Analysis

max time kernel
148s
max time network
148s
platform
windows7_x64
resource
win7-20240508-en
resource tags

arch:x64arch:x86image:win7-20240508-enlocale:en-usos:windows7-x64system
submitted
20-05-2024 22:38

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General

Target

2024-05-20_f6a07627c25346a25a4f3c7b7c5254d8_cryptolocker.exe
Size

39KB
MD5

f6a07627c25346a25a4f3c7b7c5254d8
SHA1

979f1515c4f449232747857422d64dc78485a024
SHA256

5bd7dd930c539bf98f4c1d2e0f9d0552b5519c890eb5edcc363fde636921eaa4
SHA512

8e78992af7cea0a0fab77dfc3f8dd897d3f6926272819801e5107ea36c94c1e160582c79c7e7b38c02d340860cc772295d4e5ec70e4988a3740655cb2f23aeaf
SSDEEP

768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITYoe:qDdFJy3QMOtEvwDpjjWMl7Tle

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1640-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral1/memory/1640-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2636-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1640-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral1/memory/1640-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2636-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1640-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral1/memory/1640-16-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2636-26-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

2636 asih.exe
Loads dropped DLL 1 IoCs

Processes:

2024-05-20_f6a07627c25346a25a4f3c7b7c5254d8_cryptolocker.exe

pid process

1640 2024-05-20_f6a07627c25346a25a4f3c7b7c5254d8_cryptolocker.exe

pid	process
2636	asih.exe

pid	process
1640	2024-05-20_f6a07627c25346a25a4f3c7b7c5254d8_cryptolocker.exe

UPX packed file 4 IoCs

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

upx

Processes:

resource	yara_rule
behavioral1/memory/1640-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral1/memory/1640-16-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2636-26-0x0000000000500000-0x0000000000510000-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:

2024-05-20_f6a07627c25346a25a4f3c7b7c5254d8_cryptolocker.exe

description	pid	process	target process
PID 1640 wrote to memory of 2636	1640	2024-05-20_f6a07627c25346a25a4f3c7b7c5254d8_cryptolocker.exe	asih.exe
PID 1640 wrote to memory of 2636	1640	2024-05-20_f6a07627c25346a25a4f3c7b7c5254d8_cryptolocker.exe	asih.exe
PID 1640 wrote to memory of 2636	1640	2024-05-20_f6a07627c25346a25a4f3c7b7c5254d8_cryptolocker.exe	asih.exe
PID 1640 wrote to memory of 2636	1640	2024-05-20_f6a07627c25346a25a4f3c7b7c5254d8_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-20_f6a07627c25346a25a4f3c7b7c5254d8_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-20_f6a07627c25346a25a4f3c7b7c5254d8_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1640

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:2636

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
40KB

MD5
6dd7cac5c8df24b93abe639c33366ac0

SHA1
5242af86f5f1af2e5ec793567deb29a502358acc

SHA256
6b8593cd56eb91e3388481c445101a6626409aba27e5616ea3262edfdb6c2036

SHA512
914e6c100bb8fa7419d2bb556ba8d50b22abe53f6ce4d03f41ec9dab3099e5ac10c9f4002436a79c26c3002345f38085423526269263cdf9d6aef9bac1b6b980

Download Submit
memory/1640-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1640-2-0x00000000004A0000-0x00000000004A6000-memory.dmp

Filesize
24KB

Download
memory/1640-9-0x0000000000460000-0x0000000000466000-memory.dmp

Filesize
24KB

Download
memory/1640-1-0x0000000000460000-0x0000000000466000-memory.dmp

Filesize
24KB

Download
memory/1640-16-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2636-25-0x00000000002C0000-0x00000000002C6000-memory.dmp

Filesize
24KB

Download
memory/2636-18-0x0000000000460000-0x0000000000466000-memory.dmp

Filesize
24KB

Download
memory/2636-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download