799a265a1d5a18759144cc95f539daf1106593ca8341e5a5497c19c29a52ca49

Analysis

max time kernel
148s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
28-05-2024 06:58

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General

Target

2024-05-28_e91ac2f686098e762d5a26c7cdabc5ef_cryptolocker.exe
Size

54KB
MD5

e91ac2f686098e762d5a26c7cdabc5ef
SHA1

a81da7f1d5c6866c780b447c028f913624187711
SHA256

799a265a1d5a18759144cc95f539daf1106593ca8341e5a5497c19c29a52ca49
SHA512

9aa365303f91ac40aa4fb9c04aebcdabbd84fe153662b9e62937c23531003f0645d26ba03614f2411b5b642f36460545bb05a1620e85885ef5875a84314f18c2
SSDEEP

768:X6LsoEEeegiZPvEhHSG+gp/BtOOtEvwDpjBVaD3E09vxmlcaTIE:X6QFElP6n+gJBMOtEvwDpjBtExml/

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x0007000000023289-11.dat	CryptoLocker_rule2

Detection of Cryptolocker Samples 1 IoCs

resource	yara_rule
behavioral2/files/0x0007000000023289-11.dat	CryptoLocker_set1

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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3906287020-2915474608-1755617787-1000\Control Panel\International\Geo\Nation	2024-05-28_e91ac2f686098e762d5a26c7cdabc5ef_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1096	asih.exe

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

System Information Discovery
T1082

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 4396 wrote to memory of 1096	4396	2024-05-28_e91ac2f686098e762d5a26c7cdabc5ef_cryptolocker.exe	82
PID 4396 wrote to memory of 1096	4396	2024-05-28_e91ac2f686098e762d5a26c7cdabc5ef_cryptolocker.exe	82
PID 4396 wrote to memory of 1096	4396	2024-05-28_e91ac2f686098e762d5a26c7cdabc5ef_cryptolocker.exe	82

C:\Users\Admin\AppData\Local\Temp\2024-05-28_e91ac2f686098e762d5a26c7cdabc5ef_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-28_e91ac2f686098e762d5a26c7cdabc5ef_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4396
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1096

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

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
54KB

MD5
94dcb8bc4f81d0e27268c6365bc5489e

SHA1
7e4f04e070c1f72d72d4953ded3dccdecd6931e2

SHA256
3b34a9a54f8b5e27079cf2172fa33a449bc002aac9876ba349df1c5bcb594657

SHA512
790a0acdd78a087b1610d9dcea66a72fe83628ebdb079540d805568ed63d43f2c3b1d9c75b4695228ba443d056f36943c6f59885302aae2bf73ecda721d1badf

Download Submit
memory/1096-17-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download
memory/1096-23-0x0000000000520000-0x0000000000526000-memory.dmp

Filesize
24KB

Download
memory/4396-0-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/4396-1-0x0000000002100000-0x0000000002106000-memory.dmp

Filesize
24KB

Download
memory/4396-8-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download