f0c00d222d8add24eb4e65f7da97f6326ca7df1a17e93a291d182c0344cee41c

Analysis

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

arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
submitted
20/03/2024, 00:42

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General

Target

2024-03-20_72007eec410507248db359d818a6929a_cryptolocker.exe
Size

57KB
MD5

72007eec410507248db359d818a6929a
SHA1

aa934f15bc6298cbc34d79761e1be9918e20cb10
SHA256

f0c00d222d8add24eb4e65f7da97f6326ca7df1a17e93a291d182c0344cee41c
SHA512

7fc0fd2d48c8fb8553912fe7c136f76ad70fd6abedd6349c09aaf1437c5bbcaa54c25678cc008d14258bbdc8e8aa3f66a06bcd30bf0fee629233cf746bbe8744
SSDEEP

768:z6LsoEEeegiZPvEhHSG+gzum/kLyMro2GtOOtEvwDpj/YMLam5axcE9Gz:z6QFElP6n+gKmddpMOtEvwDpj9aYa59a

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral1/memory/1660-1-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x0009000000014b70-14.dat	CryptoLocker_rule2
behavioral1/memory/1660-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2840-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2840-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral1/memory/1660-1-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/files/0x0009000000014b70-14.dat	CryptoLocker_set1
behavioral1/memory/1660-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2840-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2840-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral1/memory/1660-1-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/files/0x0009000000014b70-14.dat	UPX
behavioral1/memory/1660-15-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2840-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2840-26-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2840	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
1660	2024-03-20_72007eec410507248db359d818a6929a_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/1660-1-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/files/0x0009000000014b70-14.dat	upx
behavioral1/memory/1660-15-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2840-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2840-26-0x0000000000500000-0x0000000000510000-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 1660 wrote to memory of 2840	1660	2024-03-20_72007eec410507248db359d818a6929a_cryptolocker.exe	28
PID 1660 wrote to memory of 2840	1660	2024-03-20_72007eec410507248db359d818a6929a_cryptolocker.exe	28
PID 1660 wrote to memory of 2840	1660	2024-03-20_72007eec410507248db359d818a6929a_cryptolocker.exe	28
PID 1660 wrote to memory of 2840	1660	2024-03-20_72007eec410507248db359d818a6929a_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-03-20_72007eec410507248db359d818a6929a_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-20_72007eec410507248db359d818a6929a_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1660
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2840

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
57KB

MD5
97b45cfbf3349c0e47cfe55d920eb90e

SHA1
0b25bc98275979503cd92dbfd47e0d6b64b35cc7

SHA256
53e61ecb375790f8acfdff9f61497184b34ae832b9a693fc8f0caea8155edce3

SHA512
510426ba79a3e81762c6b37490f442f2fe8289df7979027ddfb9c8b75ef77434d337a7ebac967d319882a69446b8552920aa0e3c8447759f48afb6e0154a0405

Download Submit
memory/1660-1-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1660-0-0x00000000002C0000-0x00000000002C6000-memory.dmp

Filesize
24KB

Download
memory/1660-2-0x0000000000460000-0x0000000000466000-memory.dmp

Filesize
24KB

Download
memory/1660-9-0x00000000002C0000-0x00000000002C6000-memory.dmp

Filesize
24KB

Download
memory/1660-15-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2840-18-0x0000000000290000-0x0000000000296000-memory.dmp

Filesize
24KB

Download
memory/2840-19-0x00000000001D0000-0x00000000001D6000-memory.dmp

Filesize
24KB

Download
memory/2840-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2840-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download