9b77f1087c9a0fcf97a53bc9c8d623e91ea391db201164524d6c08dbfb1f0d3e

Analysis

max time kernel
147s
max time network
151s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
23-05-2024 18:20

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General

Target

2024-05-23_d708c42c2ef0b943ff23050fe2631c3e_cryptolocker.exe
Size

89KB
MD5

d708c42c2ef0b943ff23050fe2631c3e
SHA1

f30286ada57814de0740d932902a818cb5ec7468
SHA256

9b77f1087c9a0fcf97a53bc9c8d623e91ea391db201164524d6c08dbfb1f0d3e
SHA512

96929285fc2190b3ce6d139bb1c4735825972bbf0c31af44d2afd259d830753e395a1b55b6dde8092af871f63f8d5ea48792ab79fab12868ed77a62ac8a85995
SSDEEP

768:qkmnjFom/kLyMro2GtOOtEvwDpjeY10Y/YMsvlMdwPK80GQuchoIgtIODh:qkmnpomddpMOtEvwDpjJGYQbN/PKwMgP

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2276-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral1/memory/2276-16-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2512-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2512-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2276-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral1/memory/2276-16-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2512-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2512-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2276-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral1/memory/2276-16-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral1/memory/2512-17-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral1/memory/2512-26-0x0000000000500000-0x000000000050F000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

2512 asih.exe
Loads dropped DLL 1 IoCs

Processes:

2024-05-23_d708c42c2ef0b943ff23050fe2631c3e_cryptolocker.exe

pid process

2276 2024-05-23_d708c42c2ef0b943ff23050fe2631c3e_cryptolocker.exe

pid	process
2512	asih.exe

pid	process
2276	2024-05-23_d708c42c2ef0b943ff23050fe2631c3e_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

Processes:

resource	yara_rule
behavioral1/memory/2276-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral1/memory/2276-16-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral1/memory/2512-17-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral1/memory/2512-26-0x0000000000500000-0x000000000050F000-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:

2024-05-23_d708c42c2ef0b943ff23050fe2631c3e_cryptolocker.exe

description	pid	process	target process
PID 2276 wrote to memory of 2512	2276	2024-05-23_d708c42c2ef0b943ff23050fe2631c3e_cryptolocker.exe	asih.exe
PID 2276 wrote to memory of 2512	2276	2024-05-23_d708c42c2ef0b943ff23050fe2631c3e_cryptolocker.exe	asih.exe
PID 2276 wrote to memory of 2512	2276	2024-05-23_d708c42c2ef0b943ff23050fe2631c3e_cryptolocker.exe	asih.exe
PID 2276 wrote to memory of 2512	2276	2024-05-23_d708c42c2ef0b943ff23050fe2631c3e_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-23_d708c42c2ef0b943ff23050fe2631c3e_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-23_d708c42c2ef0b943ff23050fe2631c3e_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2276

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:2512

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
89KB

MD5
dad5c2351a0145d2c976fd3353df5b50

SHA1
2af0536ae8fcd75150b224e6ea5efa48b00c3612

SHA256
c5c212fa98b54482b5dcf7291c94358b0133ee080c0e73d10d7cb00311fcd5ca

SHA512
785724a2cd762b09b607adfeb37afd49513f541240184293cac91921b89d7a780410a91ae9a782a28cfd87e9d0cffb7b69ec26edf88ff28935c705976f24ef39

Download Submit
memory/2276-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2276-1-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2276-2-0x0000000000380000-0x0000000000386000-memory.dmp

Filesize
24KB

Download
memory/2276-9-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2276-16-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2512-17-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2512-19-0x0000000000280000-0x0000000000286000-memory.dmp

Filesize
24KB

Download
memory/2512-26-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download