60bb4881a108382592437e9d964a4ce98328e0d197d34137fb8b3106a53a54ec

Analysis

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

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
26/03/2024, 23:34

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General

Target

2024-03-26_658120adfa9a214f3e1caa9388177ef5_cryptolocker.exe
Size

40KB
MD5

658120adfa9a214f3e1caa9388177ef5
SHA1

ed7492aca6d8f181e2ecd97b4c71fe32677dcfc3
SHA256

60bb4881a108382592437e9d964a4ce98328e0d197d34137fb8b3106a53a54ec
SHA512

451f8b0fb6d7447ac9afed0a5d6631aaa80646442d06e490400d24f9d980e1a112797cf9776b3c3ff65595c48e4701b1695d1a610b4b5feac9219d9669a52427
SSDEEP

768:bCDOw9UiaKHfjnD0S16avdrQFiLjJvtAB:bCDOw9aMDooc+vAB

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/3948-0-0x0000000008000000-0x000000000800A000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000400000001e5eb-13.dat	CryptoLocker_rule2
behavioral2/memory/3948-17-0x0000000008000000-0x000000000800A000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4428-26-0x0000000008000000-0x000000000800A000-memory.dmp	CryptoLocker_rule2

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-1-5-21-983155329-280873152-1838004294-1000\Control Panel\International\Geo\Nation	2024-03-26_658120adfa9a214f3e1caa9388177ef5_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4428	lossy.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 3948 wrote to memory of 4428	3948	2024-03-26_658120adfa9a214f3e1caa9388177ef5_cryptolocker.exe	88
PID 3948 wrote to memory of 4428	3948	2024-03-26_658120adfa9a214f3e1caa9388177ef5_cryptolocker.exe	88
PID 3948 wrote to memory of 4428	3948	2024-03-26_658120adfa9a214f3e1caa9388177ef5_cryptolocker.exe	88

C:\Users\Admin\AppData\Local\Temp\2024-03-26_658120adfa9a214f3e1caa9388177ef5_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-26_658120adfa9a214f3e1caa9388177ef5_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3948
- C:\Users\Admin\AppData\Local\Temp\lossy.exe
  "C:\Users\Admin\AppData\Local\Temp\lossy.exe"
  2⤵
  - Executes dropped EXE
  PID:4428

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\lossy.exe

Filesize
40KB

MD5
80c85303bfd332d661e550489ed5dbda

SHA1
a4e051bc3a6cfc24b4ecc06fb25cc96e852b73b9

SHA256
1f9b6ea92f90e0d520c87edb85658e8d83f399cd6274fadfd44ee9bb432da3c8

SHA512
054d12029c61d9177d396741e5f7d4b83683501caf3509e848cb13166d68e9ebc9674c86d7104a22269e24fa5a8b0681e7c49f60b9c05971b3b650c959924f7c

Download Submit
memory/3948-0-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download
memory/3948-1-0x00000000021C0000-0x00000000021C6000-memory.dmp

Filesize
24KB

Download
memory/3948-2-0x00000000021C0000-0x00000000021C6000-memory.dmp

Filesize
24KB

Download
memory/3948-3-0x0000000002050000-0x0000000002056000-memory.dmp

Filesize
24KB

Download
memory/3948-17-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download
memory/4428-19-0x0000000001FE0000-0x0000000001FE6000-memory.dmp

Filesize
24KB

Download
memory/4428-21-0x0000000000520000-0x0000000000526000-memory.dmp

Filesize
24KB

Download
memory/4428-26-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download