ebffb5bb1995f56ce26af746fbb8fadd1f52b58ae47197c7901f9c6d02407bb8

Analysis

max time kernel
148s
max time network
149s
platform
windows7_x64
resource
win7-20231129-en
resource tags

arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
submitted
14/02/2024, 16:52

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General

Target

2024-02-14_61ea03ce685d2033dc9da27a4e814a31_cryptolocker.exe
Size

148KB
MD5

61ea03ce685d2033dc9da27a4e814a31
SHA1

f056c4ab2fc20ba87e7abf4a3646143b7730724d
SHA256

ebffb5bb1995f56ce26af746fbb8fadd1f52b58ae47197c7901f9c6d02407bb8
SHA512

757061810cf6b98b1d0fd8502f0ffb49d3bcca32bbf74e1ce428a8a41e96c4fecdd17f67e31b3a8df2d1fa4258fbf2be40e725460a66ca19b1d417e86446f595
SSDEEP

1536:z6QFElP6n+gKmddpMOtEvwDpj3GYQbN/PKwNgp699GNtL1eZ:z6a+CdOOtEvwDpjczj

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral1/memory/2316-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000d0000000122fa-11.dat	CryptoLocker_rule2
behavioral1/memory/2316-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/1948-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/1948-25-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral1/memory/2316-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/files/0x000d0000000122fa-11.dat	CryptoLocker_set1
behavioral1/memory/2316-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/1948-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/1948-25-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral1/memory/2316-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/files/0x000d0000000122fa-11.dat	UPX
behavioral1/memory/2316-15-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/1948-16-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/1948-25-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
1948	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
2316	2024-02-14_61ea03ce685d2033dc9da27a4e814a31_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2316-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/files/0x000d0000000122fa-11.dat	upx
behavioral1/memory/2316-15-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/1948-16-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/1948-25-0x0000000000500000-0x0000000000510000-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 2316 wrote to memory of 1948	2316	2024-02-14_61ea03ce685d2033dc9da27a4e814a31_cryptolocker.exe	28
PID 2316 wrote to memory of 1948	2316	2024-02-14_61ea03ce685d2033dc9da27a4e814a31_cryptolocker.exe	28
PID 2316 wrote to memory of 1948	2316	2024-02-14_61ea03ce685d2033dc9da27a4e814a31_cryptolocker.exe	28
PID 2316 wrote to memory of 1948	2316	2024-02-14_61ea03ce685d2033dc9da27a4e814a31_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-02-14_61ea03ce685d2033dc9da27a4e814a31_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-14_61ea03ce685d2033dc9da27a4e814a31_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2316
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1948

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
148KB

MD5
955e5290e88f43d90b8ff28f61689250

SHA1
c1f0cc3f3692eea701a3046fe76037effd486a48

SHA256
4c960b3542aa2ae7306dbb566530e296cd49684ad0e7394f34421b9698b48ea8

SHA512
1d74dc360f3a23b245d55b80a8f9f7f4a0ab451ea3ea8e46c56c0628fa770de4c3e6ab8239737850d6f5576852fbc65be644d51a40019ba63c0cceaec79c2328

Download Submit
memory/1948-16-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1948-18-0x0000000000380000-0x0000000000386000-memory.dmp

Filesize
24KB

Download
memory/1948-25-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2316-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2316-1-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2316-2-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2316-3-0x0000000000470000-0x0000000000476000-memory.dmp

Filesize
24KB

Download
memory/2316-15-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download