b025a2d3258c240146067c21275522efb33aa87a1aa6c08ef72ab3730f24d409

Analysis

max time kernel
150s
max time network
156s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
18/03/2024, 10:50

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General

Target

2024-03-18_d3fcaa0be72afd8ea62ef2e471bacc15_cryptolocker.exe
Size

69KB
MD5

d3fcaa0be72afd8ea62ef2e471bacc15
SHA1

2e3d40a85ada946b8bd3ca493e7a5b1d39126c3c
SHA256

b025a2d3258c240146067c21275522efb33aa87a1aa6c08ef72ab3730f24d409
SHA512

3ff6bf9a2acc680bcb3c6a455d072356b62371c677bf00f67916ab30d2cf8bf2d9decc6e3aff210cd05c9c5fca1bc23de85292e42f06563adcefb3db6b0b30ca
SSDEEP

1536:Dk/xY0sllyGQMOtEvwDpjwycDtKkQZQRKb61vSbgZ3QzNKUrg:DW60sllyWOtEvwDpjwF85+

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 3 IoCs

resource	yara_rule
behavioral2/memory/2400-0-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0008000000022745-13.dat	CryptoLocker_rule2
behavioral2/memory/2400-18-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 3 IoCs

resource	yara_rule
behavioral2/memory/2400-0-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0008000000022745-13.dat	CryptoLocker_set1
behavioral2/memory/2400-18-0x0000000000500000-0x000000000050B000-memory.dmp	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-1-5-21-3045580317-3728985860-206385570-1000\Control Panel\International\Geo\Nation	2024-03-18_d3fcaa0be72afd8ea62ef2e471bacc15_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3356	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 2400 wrote to memory of 3356	2400	2024-03-18_d3fcaa0be72afd8ea62ef2e471bacc15_cryptolocker.exe	90
PID 2400 wrote to memory of 3356	2400	2024-03-18_d3fcaa0be72afd8ea62ef2e471bacc15_cryptolocker.exe	90
PID 2400 wrote to memory of 3356	2400	2024-03-18_d3fcaa0be72afd8ea62ef2e471bacc15_cryptolocker.exe	90

C:\Users\Admin\AppData\Local\Temp\2024-03-18_d3fcaa0be72afd8ea62ef2e471bacc15_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-18_d3fcaa0be72afd8ea62ef2e471bacc15_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2400
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3356

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
69KB

MD5
efd264cdd8d34fd0f58f3955726a4cc1

SHA1
fc8c41e80953d60836e57b9d45386d4d3e838c00

SHA256
a21e100bc98183783945777553ca06033925732e95c62005c93824640628a42b

SHA512
f0c862436e2113daa64cedbbbb029bb468c273f2fba8e5bae495aa843a6b77c840b6229621b4d749a4968f72a8ac29bb53bd083572e1039e78eec20d5ae70116

Download Submit
memory/2400-0-0x0000000000500000-0x000000000050B000-memory.dmp

Filesize
44KB

Download
memory/2400-1-0x0000000000830000-0x0000000000836000-memory.dmp

Filesize
24KB

Download
memory/2400-2-0x0000000000830000-0x0000000000836000-memory.dmp

Filesize
24KB

Download
memory/2400-3-0x00000000020F0000-0x00000000020F6000-memory.dmp

Filesize
24KB

Download
memory/2400-18-0x0000000000500000-0x000000000050B000-memory.dmp

Filesize
44KB

Download
memory/3356-19-0x0000000002110000-0x0000000002116000-memory.dmp

Filesize
24KB

Download
memory/3356-21-0x0000000001F50000-0x0000000001F56000-memory.dmp

Filesize
24KB

Download