21bdb69a349cb8a8907a8edab5e0d6562e5d301ac60e093d838ee6b53acfb430

Analysis

max time kernel
148s
max time network
151s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
29-01-2024 02:36

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General

Target

2024-01-29_f864af345cf606c4ac87316f88b2138f_cryptolocker.exe
Size

45KB
MD5

f864af345cf606c4ac87316f88b2138f
SHA1

21ad8580fcc37abc79e8124d904aa9a52687a047
SHA256

21bdb69a349cb8a8907a8edab5e0d6562e5d301ac60e093d838ee6b53acfb430
SHA512

69592d148f4ad658ecd475f7877cf77b70bafb23516aa2039d32aaf53b1e6d7fe71c4c1bd080a66e9e7dfa53dc699fb6a277965b228b28bd0c453d71a8211bbd
SSDEEP

768:qmOKYQDf5XdrDmjr5tOOtEvwDpjAajFEitQbDmoSQCVUBJUkQqAHBIG05W2Mo4qf:qmbhXDmjr5MOtEvwDpj5cDtKkQZQN

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 6 IoCs

resource	yara_rule
behavioral1/memory/2372-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000c0000000122dc-25.dat	CryptoLocker_rule2
behavioral1/memory/2716-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2372-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000c0000000122dc-14.dat	CryptoLocker_rule2
behavioral1/memory/2716-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral1/memory/2372-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2716-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2372-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2716-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 6 IoCs

resource	yara_rule
behavioral1/memory/2372-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/files/0x000c0000000122dc-25.dat	UPX
behavioral1/memory/2716-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2372-15-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/files/0x000c0000000122dc-14.dat	UPX
behavioral1/memory/2716-27-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2716	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
2372	2024-01-29_f864af345cf606c4ac87316f88b2138f_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 2372 wrote to memory of 2716	2372	2024-01-29_f864af345cf606c4ac87316f88b2138f_cryptolocker.exe	16
PID 2372 wrote to memory of 2716	2372	2024-01-29_f864af345cf606c4ac87316f88b2138f_cryptolocker.exe	16
PID 2372 wrote to memory of 2716	2372	2024-01-29_f864af345cf606c4ac87316f88b2138f_cryptolocker.exe	16
PID 2372 wrote to memory of 2716	2372	2024-01-29_f864af345cf606c4ac87316f88b2138f_cryptolocker.exe	16

C:\Users\Admin\AppData\Local\Temp\2024-01-29_f864af345cf606c4ac87316f88b2138f_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-01-29_f864af345cf606c4ac87316f88b2138f_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2372
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2716

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
41KB

MD5
6c389053d96d6a3b151aaaaa2e1b13b6

SHA1
31514c9e0233d5694757ccf040d5dbd923e6074b

SHA256
b1ffa511ba5a6480effb94f44d2b99177b42131151e347faad7d63defd241b0d

SHA512
0322bf1e119ac25fc775ce4fe69170f0aaf27c21c909dba5ee372094af65d2f3467948d9167fb4d9b8e748f307b77b41f9f2764a05c169e01d675443047dbb9c

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

Filesize
46KB

MD5
ee8f4463049a4198cd4c1ce727f6a476

SHA1
29e6021ec4f0adb996ef15fb31846cd470cf4513

SHA256
70acb07d9c2f66e1558f4f792d476fad2fd56e372663af1225ce57d66b184fa2

SHA512
cba25a67527f587c5ebfc22ac96f3aecf0ff8b9719aaa807b2b6720575190c9418364443a06686a2218b6dff761e6d82f0e56c9f2c0bddc5c736d44fdfd579a5

Download Submit
memory/2372-1-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2372-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2372-9-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2372-2-0x0000000000270000-0x0000000000276000-memory.dmp

Filesize
24KB

Download
memory/2372-16-0x00000000026C0000-0x00000000026D0000-memory.dmp

Filesize
64KB

Download
memory/2372-15-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2716-26-0x00000000002B0000-0x00000000002B6000-memory.dmp

Filesize
24KB

Download
memory/2716-19-0x00000000002F0000-0x00000000002F6000-memory.dmp

Filesize
24KB

Download
memory/2716-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2716-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download