c39cfeb460dca0f45e5789db8480217a589d56837d809e41fa722422b3535250

Analysis

max time kernel
163s
max time network
167s
platform
windows10-2004_x64
resource
win10v2004-20240412-en
resource tags

arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
submitted
19-04-2024 00:29

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General

Target

2024-04-19_3252c03883292d93e691f8699b64228d_cryptolocker.exe
Size

41KB
MD5

3252c03883292d93e691f8699b64228d
SHA1

02ef78b2b12d249e68239a14b3b31fce31ade286
SHA256

c39cfeb460dca0f45e5789db8480217a589d56837d809e41fa722422b3535250
SHA512

86e216ccd550f26838c89fdda62167bba6e3b6d4e4531d65d345f26ed2dce86a82aece4ef743921588d79d3873f9dd99f591c006d93532588ac3cacaa3160073
SSDEEP

768:bCDOw9UiaKHfjnD0S16avdrQFiLjJvtAHR:bCDOw9aMDooc+vAx

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/4936-0-0x0000000008000000-0x000000000800A000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x00080000000234fb-13.dat	CryptoLocker_rule2
behavioral2/memory/4936-17-0x0000000008000000-0x000000000800A000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4868-26-0x0000000008000000-0x000000000800A000-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-1-5-21-1230272463-3683322193-511842230-1000\Control Panel\International\Geo\Nation	2024-04-19_3252c03883292d93e691f8699b64228d_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4868	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 4936 wrote to memory of 4868	4936	2024-04-19_3252c03883292d93e691f8699b64228d_cryptolocker.exe	93
PID 4936 wrote to memory of 4868	4936	2024-04-19_3252c03883292d93e691f8699b64228d_cryptolocker.exe	93
PID 4936 wrote to memory of 4868	4936	2024-04-19_3252c03883292d93e691f8699b64228d_cryptolocker.exe	93

C:\Users\Admin\AppData\Local\Temp\2024-04-19_3252c03883292d93e691f8699b64228d_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-19_3252c03883292d93e691f8699b64228d_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4936
- C:\Users\Admin\AppData\Local\Temp\lossy.exe
  "C:\Users\Admin\AppData\Local\Temp\lossy.exe"
  2⤵
  - Executes dropped EXE
  PID:4868

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
41KB

MD5
c5aadf04a4c627c663c2120bb48a3946

SHA1
1e5c2da6949d1408afb1c88eb785e511c2fddf35

SHA256
18ece532ac4a6e2f6bfa1b46af50387394259f47afa2272291994b7b9c9737ff

SHA512
f0a75d23b926e023073ceb5044a82fa9f597cbe23d41cda4b9e497dbc392fff0f1dfa7d5b6e9df80343d1efd84785ff1031c6bc6f66d2ce7fbb22fd924caaa67

Download Submit
memory/4868-19-0x0000000000740000-0x0000000000746000-memory.dmp

Filesize
24KB

Download
memory/4868-20-0x0000000000590000-0x0000000000596000-memory.dmp

Filesize
24KB

Download
memory/4868-26-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download
memory/4936-0-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download
memory/4936-1-0x0000000002300000-0x0000000002306000-memory.dmp

Filesize
24KB

Download
memory/4936-2-0x0000000002300000-0x0000000002306000-memory.dmp

Filesize
24KB

Download
memory/4936-3-0x00000000021A0000-0x00000000021A6000-memory.dmp

Filesize
24KB

Download
memory/4936-17-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download