50769b00ee54ec3bb96da0cddfe74a1feaef518816061a0fe55c7e20191aa351

Analysis

max time kernel
149s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
23-05-2024 00:57

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General

Target

2024-05-23_e9a9895cfa5163c9bf3809e0167995d0_cryptolocker.exe
Size

64KB
MD5

e9a9895cfa5163c9bf3809e0167995d0
SHA1

3446d1502a26c99c9affef6c6ccbdf0149b19a4d
SHA256

50769b00ee54ec3bb96da0cddfe74a1feaef518816061a0fe55c7e20191aa351
SHA512

6f7cc32ca5b42804c1a82162eee5f66072a23eb2e2af1683fff1398105a0158c88691614c3f681a80d4eb77767c557188c0ea3f6fc703b90fe5af60aee8493af
SSDEEP

1536:qmbhXDmjr5MOtEvwDpj5cDtKkQZQRKb61vSbgtsiv:BbdDmjr+OtEvwDpjM8q

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4364-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral2/memory/4364-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1916-19-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1916-28-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 2 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4364-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1916-28-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4364-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral2/memory/4364-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/1916-19-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/1916-28-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

2024-05-23_e9a9895cfa5163c9bf3809e0167995d0_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1162180587-977231257-2194346871-1000\Control Panel\International\Geo\Nation	2024-05-23_e9a9895cfa5163c9bf3809e0167995d0_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

1916 asih.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
1916	asih.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2024-05-23_e9a9895cfa5163c9bf3809e0167995d0_cryptolocker.exe

description	pid	process	target process
PID 4364 wrote to memory of 1916	4364	2024-05-23_e9a9895cfa5163c9bf3809e0167995d0_cryptolocker.exe	asih.exe
PID 4364 wrote to memory of 1916	4364	2024-05-23_e9a9895cfa5163c9bf3809e0167995d0_cryptolocker.exe	asih.exe
PID 4364 wrote to memory of 1916	4364	2024-05-23_e9a9895cfa5163c9bf3809e0167995d0_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-23_e9a9895cfa5163c9bf3809e0167995d0_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-23_e9a9895cfa5163c9bf3809e0167995d0_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4364

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:1916

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\asih.exe
Filesize
64KB

MD5
0f42d185936258c4dbb34aa0e51fb627

SHA1
0a979eaaf4eb9c047598f03a0ca1ce567c87b3b3

SHA256
836afa9a9aa1ea8a59b4db2ac92236a96aa713185c5696aa46b3a66af95db337

SHA512
a870e7f713280cd24325197a6dca6b25b7ea8490debbb4725385b3045992820558b1c6080dfcaa77e65d5714db476287660693a5393df7c22ea7c4b0dbc5b220

Download Submit
memory/1916-19-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1916-21-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/1916-27-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/1916-28-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4364-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4364-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/4364-3-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download
memory/4364-2-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/4364-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download