32ca5329a2021e1117b7c1be86622273c560baebcc4395441c30cfdcc3295c6a

Analysis

max time kernel
145s
max time network
155s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
19/02/2024, 18:32

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General

Target

2024-02-19_b822f3057def84b9dd03792bfaf60a7e_cryptolocker.exe
Size

29KB
MD5

b822f3057def84b9dd03792bfaf60a7e
SHA1

cd5f78c64d230f20970224ae87130127e96451e1
SHA256

32ca5329a2021e1117b7c1be86622273c560baebcc4395441c30cfdcc3295c6a
SHA512

8dfcf2710bb122b30405808eca7b71f2a006e61f69fbce280a68f7c6601e66cbaa0efa0560e037faa5c339b0e25a641fe7075f67cabef2d35ca34e321badad59
SSDEEP

768:q0ZziOWwULueOSdE8tOOtEvwDpjeWaJIO/xC:q0zizzOSxMOtEvwDpj/arI

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/2072-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0007000000023214-13.dat	CryptoLocker_rule2
behavioral2/memory/2072-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4408-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 2 IoCs

resource	yara_rule
behavioral2/memory/2072-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4408-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/2072-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x0007000000023214-13.dat	UPX
behavioral2/memory/2072-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4408-26-0x0000000000500000-0x0000000000510000-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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2398549320-3657759451-817663969-1000\Control Panel\International\Geo\Nation	2024-02-19_b822f3057def84b9dd03792bfaf60a7e_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4408	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 2072 wrote to memory of 4408	2072	2024-02-19_b822f3057def84b9dd03792bfaf60a7e_cryptolocker.exe	84
PID 2072 wrote to memory of 4408	2072	2024-02-19_b822f3057def84b9dd03792bfaf60a7e_cryptolocker.exe	84
PID 2072 wrote to memory of 4408	2072	2024-02-19_b822f3057def84b9dd03792bfaf60a7e_cryptolocker.exe	84

C:\Users\Admin\AppData\Local\Temp\2024-02-19_b822f3057def84b9dd03792bfaf60a7e_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-19_b822f3057def84b9dd03792bfaf60a7e_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2072
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4408

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

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Downloads

C:\Users\Admin\AppData\Local\Temp\asih.exe

Filesize
30KB

MD5
402b10f8bc3fec06bf039756506a7e97

SHA1
883e9bc89c0eb2375e1ee36c19d0f0248ce4b5e0

SHA256
9e262283c15feb03dce1b2d45cce203638ea49191f3ba040611d832a371c336e

SHA512
a727b872075327e6fc25715991b606556104f0ceabfb81c31d3ba3c372e64aa040068c097814626d52e73fc0c6a2063769e6513af5dbd8aa8b06557ed743374c

Download Submit
memory/2072-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2072-1-0x0000000000560000-0x0000000000566000-memory.dmp

Filesize
24KB

Download
memory/2072-2-0x0000000000560000-0x0000000000566000-memory.dmp

Filesize
24KB

Download
memory/2072-3-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download
memory/2072-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4408-21-0x00000000005B0000-0x00000000005B6000-memory.dmp

Filesize
24KB

Download
memory/4408-19-0x00000000005E0000-0x00000000005E6000-memory.dmp

Filesize
24KB

Download
memory/4408-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download