0e2427f3591da1e0c29159c3225289e93bd8512f3789caed4ac1efb5b757e265

Analysis

max time kernel
148s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
11-06-2024 03:28

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General

Target

2024-06-11_3e3cf6d3d147175679e0310d362e99b4_cryptolocker.exe
Size

33KB
MD5

3e3cf6d3d147175679e0310d362e99b4
SHA1

853a8f8a4111a6180a612d30490676224820420e
SHA256

0e2427f3591da1e0c29159c3225289e93bd8512f3789caed4ac1efb5b757e265
SHA512

0d583f3c0fb2a1d7454cf338da48551c6c8f16e978fb1b6dccfce9b1e032582b4226ab02d9ef71ad275fea6b2a5cf21380eb475b006612727d218684274aa62f
SSDEEP

768:bROjawZEjbhxnbcuyD7U9kXfn62tH/1/LpP+5:bRO2wZEjbnouy8Gv6iH/NLpU

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 3 IoCs

resource	yara_rule
behavioral2/memory/2080-0-0x0000000000400000-0x000000000040D000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0007000000023288-13.dat	CryptoLocker_rule2
behavioral2/memory/4860-18-0x0000000000400000-0x000000000040D000-memory.dmp	CryptoLocker_rule2

UPX dump on OEP (original entry point) 3 IoCs

resource	yara_rule
behavioral2/memory/2080-0-0x0000000000400000-0x000000000040D000-memory.dmp	UPX
behavioral2/files/0x0007000000023288-13.dat	UPX
behavioral2/memory/4860-18-0x0000000000400000-0x000000000040D000-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-1-5-21-3906287020-2915474608-1755617787-1000\Control Panel\International\Geo\Nation	2024-06-11_3e3cf6d3d147175679e0310d362e99b4_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4860	rewok.exe

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2080-0-0x0000000000400000-0x000000000040D000-memory.dmp	upx
behavioral2/files/0x0007000000023288-13.dat	upx
behavioral2/memory/4860-18-0x0000000000400000-0x000000000040D000-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 2080 wrote to memory of 4860	2080	2024-06-11_3e3cf6d3d147175679e0310d362e99b4_cryptolocker.exe	80
PID 2080 wrote to memory of 4860	2080	2024-06-11_3e3cf6d3d147175679e0310d362e99b4_cryptolocker.exe	80
PID 2080 wrote to memory of 4860	2080	2024-06-11_3e3cf6d3d147175679e0310d362e99b4_cryptolocker.exe	80

C:\Users\Admin\AppData\Local\Temp\2024-06-11_3e3cf6d3d147175679e0310d362e99b4_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-11_3e3cf6d3d147175679e0310d362e99b4_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2080
- C:\Users\Admin\AppData\Local\Temp\rewok.exe
  "C:\Users\Admin\AppData\Local\Temp\rewok.exe"
  2⤵
  - Executes dropped EXE
  PID:4860

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\rewok.exe

Filesize
33KB

MD5
1c70f57a33a753154eb17d46f5c338cb

SHA1
d4a91d62ee49d095479a46346e5fd9a00a664285

SHA256
8459ed4f1f0857557dfbc7391a944655efae93e6c560dd342ec902b3b6de2a1b

SHA512
837a4099d0e1f8aaa40a9931fa58c2e7b3c08d2e32896047058868c5988b62a05db91fd30cc09c8dbbc64dfd85867b04bed04411fe2d21adfe48058952d34cb3

Download Submit
memory/2080-0-0x0000000000400000-0x000000000040D000-memory.dmp

Filesize
52KB

Download
memory/2080-1-0x0000000002190000-0x0000000002196000-memory.dmp

Filesize
24KB

Download
memory/2080-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/2080-9-0x0000000002190000-0x0000000002196000-memory.dmp

Filesize
24KB

Download
memory/4860-18-0x0000000000400000-0x000000000040D000-memory.dmp

Filesize
52KB

Download
memory/4860-26-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

Filesize
24KB

Download