876d430838801ab597b26249a1b5f81d8409205b9282cf590caa514f75e22b36

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
11/05/2024, 12:30

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General

Target

2024-05-11_cdeca6234d9ea668c9fdc2b936782afb_cryptolocker.exe
Size

39KB
MD5

cdeca6234d9ea668c9fdc2b936782afb
SHA1

25363aa8fc19b8f9969de8c47807276b68be7e9b
SHA256

876d430838801ab597b26249a1b5f81d8409205b9282cf590caa514f75e22b36
SHA512

b8f462cd95054352046b9d27998d23e7a4d680034819de5506f279a1ded0f6882d5f9f579695deebe85c8d3a9708cbc6a350bb30f5db62b11ea91862ce2572b5
SSDEEP

768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITY9V:qDdFJy3QMOtEvwDpjjWMl7TO

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral1/memory/2324-1-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000d000000012262-17.dat	CryptoLocker_rule2
behavioral1/memory/2324-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2324-13-0x0000000001DA0000-0x0000000001DB0000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/1308-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral1/memory/2324-1-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/files/0x000d000000012262-17.dat	CryptoLocker_set1
behavioral1/memory/2324-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2324-13-0x0000000001DA0000-0x0000000001DB0000-memory.dmp	CryptoLocker_set1
behavioral1/memory/1308-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral1/memory/2324-1-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/files/0x000d000000012262-17.dat	UPX
behavioral1/memory/2324-16-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2324-13-0x0000000001DA0000-0x0000000001DB0000-memory.dmp	UPX
behavioral1/memory/1308-27-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
1308	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
2324	2024-05-11_cdeca6234d9ea668c9fdc2b936782afb_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2324-1-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/files/0x000d000000012262-17.dat	upx
behavioral1/memory/2324-16-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2324-13-0x0000000001DA0000-0x0000000001DB0000-memory.dmp	upx
behavioral1/memory/1308-27-0x0000000000500000-0x0000000000510000-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

description	pid	Process	procid_target
PID 2324 wrote to memory of 1308	2324	2024-05-11_cdeca6234d9ea668c9fdc2b936782afb_cryptolocker.exe	28
PID 2324 wrote to memory of 1308	2324	2024-05-11_cdeca6234d9ea668c9fdc2b936782afb_cryptolocker.exe	28
PID 2324 wrote to memory of 1308	2324	2024-05-11_cdeca6234d9ea668c9fdc2b936782afb_cryptolocker.exe	28
PID 2324 wrote to memory of 1308	2324	2024-05-11_cdeca6234d9ea668c9fdc2b936782afb_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-05-11_cdeca6234d9ea668c9fdc2b936782afb_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-11_cdeca6234d9ea668c9fdc2b936782afb_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2324
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1308

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

C:\Users\Admin\AppData\Local\Temp\asih.exe

Filesize
39KB

MD5
a1043256478c7b92f5ce35031ebfb906

SHA1
fa8c64221d208538ea1aa95cbf176dc45a5180c8

SHA256
182a618d7bf92814c3f10c73400451ae89b3929e7bd28596f28b324fd8208393

SHA512
826e2991edaa2fc99e8e23165cda209ca1f0deebe2e00e8efd605741b88d6d6877e2c48b060f6801c36277a0a7bc0717c98981f8e263426388b0a57413c78738

Download Submit
memory/1308-26-0x00000000002B0000-0x00000000002B6000-memory.dmp

Filesize
24KB

Download
memory/1308-19-0x0000000000300000-0x0000000000306000-memory.dmp

Filesize
24KB

Download
memory/1308-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2324-0-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2324-3-0x0000000000280000-0x0000000000286000-memory.dmp

Filesize
24KB

Download
memory/2324-2-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2324-1-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2324-16-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2324-13-0x0000000001DA0000-0x0000000001DB0000-memory.dmp

Filesize
64KB

Download