ef8595c8dab9d39ec2d6d88aae79454068d805ec6ac920921f770430b70451c4

Analysis

max time kernel
149s
max time network
153s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
21-05-2024 15:58

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General

Target

2024-05-21_c9a00793ae23ae077b1055a7d677a487_cryptolocker.exe
Size

64KB
MD5

c9a00793ae23ae077b1055a7d677a487
SHA1

55c8da42d89c7fbb71b590fcda65d795110a3d2b
SHA256

ef8595c8dab9d39ec2d6d88aae79454068d805ec6ac920921f770430b70451c4
SHA512

f890a14da185fefedb232f7975ffe4f7c76b60eb23921aea6729fccdc74fcb2e69696911f06cd9d844fb19bfdf382813dafa42eabdec807208046fe2056cf7c2
SSDEEP

1536:qmbhXDmjr5MOtEvwDpj5cDtKkQZQRKb61vSbgtsiy:BbdDmjr+OtEvwDpjM8P

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2772-1-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral1/memory/2772-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2932-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2932-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 3 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2772-1-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2772-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2932-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2772-1-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral1/memory/2772-15-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2932-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2932-26-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

2932 asih.exe
Loads dropped DLL 1 IoCs

Processes:

2024-05-21_c9a00793ae23ae077b1055a7d677a487_cryptolocker.exe

pid process

2772 2024-05-21_c9a00793ae23ae077b1055a7d677a487_cryptolocker.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
2932	asih.exe

pid	process
2772	2024-05-21_c9a00793ae23ae077b1055a7d677a487_cryptolocker.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

2024-05-21_c9a00793ae23ae077b1055a7d677a487_cryptolocker.exe

description	pid	process	target process
PID 2772 wrote to memory of 2932	2772	2024-05-21_c9a00793ae23ae077b1055a7d677a487_cryptolocker.exe	asih.exe
PID 2772 wrote to memory of 2932	2772	2024-05-21_c9a00793ae23ae077b1055a7d677a487_cryptolocker.exe	asih.exe
PID 2772 wrote to memory of 2932	2772	2024-05-21_c9a00793ae23ae077b1055a7d677a487_cryptolocker.exe	asih.exe
PID 2772 wrote to memory of 2932	2772	2024-05-21_c9a00793ae23ae077b1055a7d677a487_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-21_c9a00793ae23ae077b1055a7d677a487_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-21_c9a00793ae23ae077b1055a7d677a487_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2772
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2932

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
64KB

MD5
d414fca5e92877973c523503da007180

SHA1
57874c3d3cf4acf097c856453d196a122bd59634

SHA256
9997d4633f25af83c4fa0642ddd4ab58be65223df1944476513bf51ec249bc9f

SHA512
068b77c77eba1c8a2f180237bf975ec464d885935484d8ee01042d18c7917f37b97cd5c0ab406372a0fb549ce5fdb37ca35a7df0886f7522adc44c2670f8be2a

Download Submit
memory/2772-1-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2772-0-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2772-2-0x0000000000270000-0x0000000000276000-memory.dmp

Filesize
24KB

Download
memory/2772-9-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2772-15-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2932-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2932-19-0x0000000000360000-0x0000000000366000-memory.dmp

Filesize
24KB

Download
memory/2932-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download