21c7ae9d39bb043533dc137737993c4736cb6ebd528950ecbce486ac97991fb6

Analysis

max time kernel
148s
max time network
149s
platform
windows7_x64
resource
win7-20240419-en
resource tags

arch:x64arch:x86image:win7-20240419-enlocale:en-usos:windows7-x64system
submitted
21-05-2024 15:03

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General

Target

2024-05-21_e63ad7d39f46eda10a2d7f323e37d80c_cryptolocker.exe
Size

91KB
MD5

e63ad7d39f46eda10a2d7f323e37d80c
SHA1

6fdf357dd360548fffbf3cf414c9efb3898160f6
SHA256

21c7ae9d39bb043533dc137737993c4736cb6ebd528950ecbce486ac97991fb6
SHA512

8b0ef2ff385781633dcb2de17385f7fb9945b96aca1a6b06ec4e9aafce9bf9737ca25997adc9292ad7aa8016833e40ff6d9a53ac54ba9d7a0a0b186c0132d836
SSDEEP

1536:n6QFElP6n+g9u9cvMOtEvwDpjYYTjipvF2bx1PQAA/DV:n6a+1SEOtEvwDpjYYvQd2P6

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1180-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral1/memory/1180-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/1836-25-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1180-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral1/memory/1180-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/1836-25-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1180-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral1/memory/1180-15-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/1836-25-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

1836 asih.exe
Loads dropped DLL 1 IoCs

Processes:

2024-05-21_e63ad7d39f46eda10a2d7f323e37d80c_cryptolocker.exe

pid process

1180 2024-05-21_e63ad7d39f46eda10a2d7f323e37d80c_cryptolocker.exe

pid	process
1836	asih.exe

pid	process
1180	2024-05-21_e63ad7d39f46eda10a2d7f323e37d80c_cryptolocker.exe

UPX packed file 4 IoCs

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

upx

Processes:

resource	yara_rule
behavioral1/memory/1180-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral1/memory/1180-15-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/1836-25-0x0000000000500000-0x0000000000510000-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:

2024-05-21_e63ad7d39f46eda10a2d7f323e37d80c_cryptolocker.exe

description	pid	process	target process
PID 1180 wrote to memory of 1836	1180	2024-05-21_e63ad7d39f46eda10a2d7f323e37d80c_cryptolocker.exe	asih.exe
PID 1180 wrote to memory of 1836	1180	2024-05-21_e63ad7d39f46eda10a2d7f323e37d80c_cryptolocker.exe	asih.exe
PID 1180 wrote to memory of 1836	1180	2024-05-21_e63ad7d39f46eda10a2d7f323e37d80c_cryptolocker.exe	asih.exe
PID 1180 wrote to memory of 1836	1180	2024-05-21_e63ad7d39f46eda10a2d7f323e37d80c_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-21_e63ad7d39f46eda10a2d7f323e37d80c_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-21_e63ad7d39f46eda10a2d7f323e37d80c_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1180

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:1836

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
91KB

MD5
c7cc1a7710d334bc035e8c2c53f49b48

SHA1
e7a8eedbb4f36065f9c8365b08412e3128680977

SHA256
040f9a33d4e5563372d4f7afb68daaab03165d14f815b5e0616f5bc44ad5f141

SHA512
c4f5e66f13edba821dd550a0652d6aa74852eb6d6f5fe7421f688a604d90e066cd670c52cc4447d52232c0719279f75fc5773171c10b1d9a6dcab4773df6e66e

Download Submit
memory/1180-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1180-1-0x0000000000350000-0x0000000000356000-memory.dmp

Filesize
24KB

Download
memory/1180-2-0x0000000000350000-0x0000000000356000-memory.dmp

Filesize
24KB

Download
memory/1180-3-0x0000000000490000-0x0000000000496000-memory.dmp

Filesize
24KB

Download
memory/1180-15-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1836-17-0x0000000001CA0000-0x0000000001CA6000-memory.dmp

Filesize
24KB

Download
memory/1836-24-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/1836-25-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download