f066eb36d005e4511cf18ddf4a0a7a4d952a58f7e7a196d499827c5fd10b1051

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
22-05-2024 21:51

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General

Target

2024-05-22_94c362d801691e3973aeb8e7ad025d15_cryptolocker.exe
Size

39KB
MD5

94c362d801691e3973aeb8e7ad025d15
SHA1

dbc15913b48cc2e059c914d7325a3f6de5a56825
SHA256

f066eb36d005e4511cf18ddf4a0a7a4d952a58f7e7a196d499827c5fd10b1051
SHA512

fed2a7376aa23a4a817ed9c5708a42b392766393bf905db93396e1919ab614f59ac394b4f5ed26a3245fa327924fe6e3c8aa070352833920605302d998b47dee
SSDEEP

768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITYaBsw:qDdFJy3QMOtEvwDpjjWMl7TdX

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2108-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral1/memory/2108-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2480-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2108-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral1/memory/2108-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2480-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2108-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral1/memory/2108-16-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2480-26-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

2480 asih.exe
Loads dropped DLL 1 IoCs

Processes:

2024-05-22_94c362d801691e3973aeb8e7ad025d15_cryptolocker.exe

pid process

2108 2024-05-22_94c362d801691e3973aeb8e7ad025d15_cryptolocker.exe

pid	process
2480	asih.exe

pid	process
2108	2024-05-22_94c362d801691e3973aeb8e7ad025d15_cryptolocker.exe

UPX packed file 4 IoCs

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

upx

Processes:

resource	yara_rule
behavioral1/memory/2108-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral1/memory/2108-16-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2480-26-0x0000000000500000-0x0000000000510000-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_94c362d801691e3973aeb8e7ad025d15_cryptolocker.exe

description	pid	process	target process
PID 2108 wrote to memory of 2480	2108	2024-05-22_94c362d801691e3973aeb8e7ad025d15_cryptolocker.exe	asih.exe
PID 2108 wrote to memory of 2480	2108	2024-05-22_94c362d801691e3973aeb8e7ad025d15_cryptolocker.exe	asih.exe
PID 2108 wrote to memory of 2480	2108	2024-05-22_94c362d801691e3973aeb8e7ad025d15_cryptolocker.exe	asih.exe
PID 2108 wrote to memory of 2480	2108	2024-05-22_94c362d801691e3973aeb8e7ad025d15_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-22_94c362d801691e3973aeb8e7ad025d15_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-22_94c362d801691e3973aeb8e7ad025d15_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2108

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:2480

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
39KB

MD5
4e44e10c1f2abf852f5b10dbade3750d

SHA1
0b8144c393a719d20e8118d0fdac4d077f5a4425

SHA256
04234a4123c2cea5d305fb734fece979220718daa12ad95ee46fd57065674da3

SHA512
60deaa464bd1c557ca0522496e75c5f312b05945b8c5337871b8018597969b75658e4fee85c0cbe6f9ba4e03193999c761a249b613151d2f56d03c59cc18a668

Download Submit
memory/2108-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2108-9-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2108-2-0x0000000000300000-0x0000000000306000-memory.dmp

Filesize
24KB

Download
memory/2108-1-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2108-16-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2480-25-0x00000000002C0000-0x00000000002C6000-memory.dmp

Filesize
24KB

Download
memory/2480-18-0x00000000004C0000-0x00000000004C6000-memory.dmp

Filesize
24KB

Download
memory/2480-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download