b0723e79f6f96fd36810092e660d876afc308123713e2453cc7f921d988be0de

Analysis

max time kernel
150s
max time network
156s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
08/03/2024, 21:36

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General

Target

2024-03-08_bf0408240f8b88bb06b5823040118fb5_cryptolocker.exe
Size

35KB
MD5

bf0408240f8b88bb06b5823040118fb5
SHA1

af9ceb715e18c0add90daacec8a26db6871fc624
SHA256

b0723e79f6f96fd36810092e660d876afc308123713e2453cc7f921d988be0de
SHA512

1ed4f8614dcb9732a70f456470eea0ede292281fa64e6e0d8f20bab0e6975ed0986af99a3935a7c7480116e2d5bcb29a599861b200bfe387fe59103e0f20d2af
SSDEEP

768:qmOKYQDf5XdrDmjr5tOOtEvwDpjAajFEitQbDmoW8t:qmbhXDmjr5MOtEvwDpj5cDvt

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 6 IoCs

resource	yara_rule
behavioral1/memory/2660-1-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000d00000001224c-11.dat	CryptoLocker_rule2
behavioral1/memory/2660-13-0x0000000002700000-0x0000000002710000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2648-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2660-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2648-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral1/memory/2660-1-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2648-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2660-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2648-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 6 IoCs

resource	yara_rule
behavioral1/memory/2660-1-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/files/0x000d00000001224c-11.dat	UPX
behavioral1/memory/2660-13-0x0000000002700000-0x0000000002710000-memory.dmp	UPX
behavioral1/memory/2648-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2660-16-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2648-27-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2648	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
2660	2024-03-08_bf0408240f8b88bb06b5823040118fb5_cryptolocker.exe

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 2660 wrote to memory of 2648	2660	2024-03-08_bf0408240f8b88bb06b5823040118fb5_cryptolocker.exe	28
PID 2660 wrote to memory of 2648	2660	2024-03-08_bf0408240f8b88bb06b5823040118fb5_cryptolocker.exe	28
PID 2660 wrote to memory of 2648	2660	2024-03-08_bf0408240f8b88bb06b5823040118fb5_cryptolocker.exe	28
PID 2660 wrote to memory of 2648	2660	2024-03-08_bf0408240f8b88bb06b5823040118fb5_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-03-08_bf0408240f8b88bb06b5823040118fb5_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-08_bf0408240f8b88bb06b5823040118fb5_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2660
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2648

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
35KB

MD5
4a8b097bde5b6a4098b571b6d7f6f21c

SHA1
af63c2b3093e1a3cec6cd51b7b36fced24cc0085

SHA256
7a097ffcb45062f5f295abef92b4365e990b588a27e38e2db4780514ec4271eb

SHA512
85bf30e7d69ad89edd300e5b94cae12f08a1a8162306702beb1295d33d2df88dddd097437364066a27d123e184e52c17816731a6df1b0ee94449a2bb62dd8976

Download Submit
memory/2648-26-0x00000000002C0000-0x00000000002C6000-memory.dmp

Filesize
24KB

Download
memory/2648-19-0x0000000000370000-0x0000000000376000-memory.dmp

Filesize
24KB

Download
memory/2648-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2648-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2660-2-0x00000000002F0000-0x00000000002F6000-memory.dmp

Filesize
24KB

Download
memory/2660-1-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2660-8-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2660-0-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2660-13-0x0000000002700000-0x0000000002710000-memory.dmp

Filesize
64KB

Download
memory/2660-16-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download