e59245e83b7ce24f82683d2108e56fb5d63d03ac378106af15c140c662b47c33

Analysis

max time kernel
150s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
28-05-2024 03:37

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General

Target

2024-05-28_559326fe6a5be56f834f8ab05f419984_cryptolocker.exe
Size

34KB
MD5

559326fe6a5be56f834f8ab05f419984
SHA1

cadc14110fa586aeb274a232ddf24126e93a92ca
SHA256

e59245e83b7ce24f82683d2108e56fb5d63d03ac378106af15c140c662b47c33
SHA512

926c4595ca74462dbce8f6a968ca2ce7fc10b954c2f5ca6fdef66e0153057035ae5675d4f83e89834aed0650369ad360d9155f2f20a32679530a7737d2123413
SSDEEP

768:bFPm5zusFUB2preAr+Ofjg0S16avdrQFiLjJvtXl:bFPmpiif/oc+vXl

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/3812-0-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0008000000022f51-13.dat	CryptoLocker_rule2
behavioral2/memory/3972-19-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3812-17-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3972-28-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/3812-0-0x0000000008000000-0x000000000800E000-memory.dmp	UPX
behavioral2/files/0x0008000000022f51-13.dat	UPX
behavioral2/memory/3972-19-0x0000000008000000-0x000000000800E000-memory.dmp	UPX
behavioral2/memory/3812-17-0x0000000008000000-0x000000000800E000-memory.dmp	UPX
behavioral2/memory/3972-28-0x0000000008000000-0x000000000800E000-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-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation	2024-05-28_559326fe6a5be56f834f8ab05f419984_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3972	lossy.exe

UPX packed file 5 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral2/memory/3812-0-0x0000000008000000-0x000000000800E000-memory.dmp	upx
behavioral2/files/0x0008000000022f51-13.dat	upx
behavioral2/memory/3972-19-0x0000000008000000-0x000000000800E000-memory.dmp	upx
behavioral2/memory/3812-17-0x0000000008000000-0x000000000800E000-memory.dmp	upx
behavioral2/memory/3972-28-0x0000000008000000-0x000000000800E000-memory.dmp	upx

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 3812 wrote to memory of 3972	3812	2024-05-28_559326fe6a5be56f834f8ab05f419984_cryptolocker.exe	83
PID 3812 wrote to memory of 3972	3812	2024-05-28_559326fe6a5be56f834f8ab05f419984_cryptolocker.exe	83
PID 3812 wrote to memory of 3972	3812	2024-05-28_559326fe6a5be56f834f8ab05f419984_cryptolocker.exe	83

C:\Users\Admin\AppData\Local\Temp\2024-05-28_559326fe6a5be56f834f8ab05f419984_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-28_559326fe6a5be56f834f8ab05f419984_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3812
- C:\Users\Admin\AppData\Local\Temp\lossy.exe
  "C:\Users\Admin\AppData\Local\Temp\lossy.exe"
  2⤵
  - Executes dropped EXE
  PID:3972

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
35KB

MD5
0115dea60f5592f7ebfbd4eca7c7a0d0

SHA1
35c10fcd582ad60cafcce8f779a8abe43f6902b7

SHA256
3d4250b40fc822359601480b3206b8b51a1b9e4da293da9ddbd659b5575131f6

SHA512
c2e01605ccef93da444cbf42122415da8d13354e66b351b08396b6f9bb8321fdb6a1afe8e12df62454c8fb91a811f13cbb5c06adc72f10d7bf92e3c6a5e41784

Download Submit
memory/3812-0-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download
memory/3812-1-0x00000000021D0000-0x00000000021D6000-memory.dmp

Filesize
24KB

Download
memory/3812-2-0x0000000002040000-0x0000000002046000-memory.dmp

Filesize
24KB

Download
memory/3812-9-0x00000000021D0000-0x00000000021D6000-memory.dmp

Filesize
24KB

Download
memory/3812-17-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download
memory/3972-19-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download
memory/3972-21-0x0000000002050000-0x0000000002056000-memory.dmp

Filesize
24KB

Download
memory/3972-27-0x00000000021C0000-0x00000000021C6000-memory.dmp

Filesize
24KB

Download
memory/3972-28-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download