26b765ec77613dd198b854e6e4578d264ccf6b8af8f8a8eb32e6c97f9e6f4bc2

Analysis

max time kernel
145s
max time network
176s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
18/01/2024, 23:03

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General

Target

2024-01-18_8cf547c807ade177842b5bdb8b6d581b_cryptolocker.exe
Size

58KB
MD5

8cf547c807ade177842b5bdb8b6d581b
SHA1

a0106d7f6343c594948e73a3d52f872f8285e9a0
SHA256

26b765ec77613dd198b854e6e4578d264ccf6b8af8f8a8eb32e6c97f9e6f4bc2
SHA512

d74b603f77c48660460ec85ba623648a38613149044e85084b37db81de0286b1dc726d02401d63c42585517288b9677a8e0caf7a58a32e1e7148cd031f15bd78
SSDEEP

1536:qmbhXDmjr5MOtEvwDpj5cDtKkQZQRKb614f:BbdDmjr+OtEvwDpjMU

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral1/memory/1088-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000b000000012261-11.dat	CryptoLocker_rule2
behavioral1/memory/1088-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2720-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2720-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 3 IoCs

resource	yara_rule
behavioral1/memory/1088-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2720-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2720-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral1/memory/1088-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/files/0x000b000000012261-11.dat	UPX
behavioral1/memory/1088-15-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2720-16-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2720-26-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2720	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
1088	2024-01-18_8cf547c807ade177842b5bdb8b6d581b_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 1088 wrote to memory of 2720	1088	2024-01-18_8cf547c807ade177842b5bdb8b6d581b_cryptolocker.exe	28
PID 1088 wrote to memory of 2720	1088	2024-01-18_8cf547c807ade177842b5bdb8b6d581b_cryptolocker.exe	28
PID 1088 wrote to memory of 2720	1088	2024-01-18_8cf547c807ade177842b5bdb8b6d581b_cryptolocker.exe	28
PID 1088 wrote to memory of 2720	1088	2024-01-18_8cf547c807ade177842b5bdb8b6d581b_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-01-18_8cf547c807ade177842b5bdb8b6d581b_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-01-18_8cf547c807ade177842b5bdb8b6d581b_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1088
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2720

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
58KB

MD5
9f51e8a4b5b233f7e08f66bbdf1ded3a

SHA1
685ed24e60918f88c5686c469f6c954e786e5273

SHA256
fdffabaecaecb0bb8721ed606f5e078a15f77925e8b20ca8ce8ed022ea3cd19f

SHA512
c2828e7cd15dda5e1870a890d9a7d5d8471d031dc455298b90c932dd0bf6a47cd52a32b2e6eb4b6b19d189d3713bfa9129d59bf99a130cbe4518e54400f25c72

Download Submit
memory/1088-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1088-1-0x00000000002C0000-0x00000000002C6000-memory.dmp

Filesize
24KB

Download
memory/1088-2-0x0000000000330000-0x0000000000336000-memory.dmp

Filesize
24KB

Download
memory/1088-4-0x00000000002C0000-0x00000000002C6000-memory.dmp

Filesize
24KB

Download
memory/1088-15-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2720-16-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2720-18-0x0000000000210000-0x0000000000216000-memory.dmp

Filesize
24KB

Download
memory/2720-22-0x00000000001D0000-0x00000000001D6000-memory.dmp

Filesize
24KB

Download
memory/2720-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download