5a19f46ef4ce4c3f0e402862c4185671425f918bcc9f9c985f39ccec7e6c54ba

Analysis

max time kernel
149s
max time network
155s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
08/04/2024, 12:54

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General

Target

2024-04-08_d991163c85e1b6e01bafee65b6e6d0f1_cryptolocker.exe
Size

77KB
MD5

d991163c85e1b6e01bafee65b6e6d0f1
SHA1

5e0e6e13db4b47f2f7166567f3b9429cc42550e2
SHA256

5a19f46ef4ce4c3f0e402862c4185671425f918bcc9f9c985f39ccec7e6c54ba
SHA512

544f3ad8058d301a620683bca39e4a8cdc5d8a42b0ae54a703406d6faf63e4ea148d16253eb1937dee8515a0fdca5c0630aa5ed35c23bf37c2fd0e08d8ca3c5e
SSDEEP

768:V6LsoEEeegiZPvEhHSG+gDYQtOOtEvwDpj/MLa5VccPtNw5CS95yq97:V6QFElP6n+gMQMOtEvwDpjyaLccVNlup

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x0008000000023214-12.dat	CryptoLocker_rule2

Detection of Cryptolocker Samples 1 IoCs

resource	yara_rule
behavioral2/files/0x0008000000023214-12.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-1-5-21-557049126-2506969350-2798870634-1000\Control Panel\International\Geo\Nation	2024-04-08_d991163c85e1b6e01bafee65b6e6d0f1_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1984	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 1244 wrote to memory of 1984	1244	2024-04-08_d991163c85e1b6e01bafee65b6e6d0f1_cryptolocker.exe	88
PID 1244 wrote to memory of 1984	1244	2024-04-08_d991163c85e1b6e01bafee65b6e6d0f1_cryptolocker.exe	88
PID 1244 wrote to memory of 1984	1244	2024-04-08_d991163c85e1b6e01bafee65b6e6d0f1_cryptolocker.exe	88

C:\Users\Admin\AppData\Local\Temp\2024-04-08_d991163c85e1b6e01bafee65b6e6d0f1_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-08_d991163c85e1b6e01bafee65b6e6d0f1_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1244
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1984

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
78KB

MD5
ad6a5367e53a08ee21d30fd874a68deb

SHA1
39e4be02cdc5d10a236f61b24b2473048fac669a

SHA256
66189902f117634e0b08a575296ae8031b73373ffb5e00fce7c9ac3902593211

SHA512
a4c154f066de64f12e57fcb62f2bd40087e3326724e72d20f665a55829b2cad7754f27ea29c05d6fd86db9c5afcf7d7013375f5ea0d615425f3c22c73053f0ce

Download Submit
memory/1244-0-0x0000000000670000-0x0000000000676000-memory.dmp

Filesize
24KB

Download
memory/1244-1-0x0000000000670000-0x0000000000676000-memory.dmp

Filesize
24KB

Download
memory/1244-2-0x0000000002070000-0x0000000002076000-memory.dmp

Filesize
24KB

Download
memory/1984-17-0x0000000000590000-0x0000000000596000-memory.dmp

Filesize
24KB

Download
memory/1984-22-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download