a9eebfd037bdbe6f9eff6cdaa45ef57578b256f13b53d92b9b8e730b965c7df7

Analysis

max time kernel
85s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
14/02/2024, 17:27

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General

Target

2024-02-14_b875049c5bdfbdab6b261d81c29b8310_cryptolocker.exe
Size

41KB
MD5

b875049c5bdfbdab6b261d81c29b8310
SHA1

f2b6bfaf79bd1fc86d28b3d53a4f733d9df111d2
SHA256

a9eebfd037bdbe6f9eff6cdaa45ef57578b256f13b53d92b9b8e730b965c7df7
SHA512

a62740671ec6fb4b1d64ba442152c28a3ccf03b1ffb295e28ec7af2d1ce04d79c4a76f7db1ff36f13dbe33f7734a4eb26d39c899ea734f461f1e083b0ac71fc7
SSDEEP

768:Kf1K2exg2kBwtdgI2MyzNORQtOflIwoHNV2XBFV72BOlA7ZsBGGpebVIYLHA3Kxh:o1KhxqwtdgI2MyzNORQtOflIwoHNV2Xg

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x0006000000023218-12.dat	CryptoLocker_rule2

Detection of Cryptolocker Samples 1 IoCs

resource	yara_rule
behavioral2/files/0x0006000000023218-12.dat	CryptoLocker_set1

Checks computer location settings 2 TTPs 2 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-1-5-21-2398549320-3657759451-817663969-1000\Control Panel\International\Geo\Nation	2024-02-14_b875049c5bdfbdab6b261d81c29b8310_cryptolocker.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2398549320-3657759451-817663969-1000\Control Panel\International\Geo\Nation	hurok.exe

Executes dropped EXE 1 IoCs

pid	Process
3668	hurok.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 4132 wrote to memory of 3668	4132	2024-02-14_b875049c5bdfbdab6b261d81c29b8310_cryptolocker.exe	84
PID 4132 wrote to memory of 3668	4132	2024-02-14_b875049c5bdfbdab6b261d81c29b8310_cryptolocker.exe	84
PID 4132 wrote to memory of 3668	4132	2024-02-14_b875049c5bdfbdab6b261d81c29b8310_cryptolocker.exe	84

C:\Users\Admin\AppData\Local\Temp\2024-02-14_b875049c5bdfbdab6b261d81c29b8310_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-14_b875049c5bdfbdab6b261d81c29b8310_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4132
- C:\Users\Admin\AppData\Local\Temp\hurok.exe
  "C:\Users\Admin\AppData\Local\Temp\hurok.exe"
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  PID:3668

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\hurok.exe

Filesize
41KB

MD5
474428d9794f69751dcd3a7730372913

SHA1
861d2b037c4b24d4f1c2c94451a4e0783b8b50ea

SHA256
ca2bf318b44d1525deeff1b8bfec4f81a0970fd94f2fbbd2a2cb0bc7c1d3ef8b

SHA512
f93984123a9a7ff1007b9090cf0a0b8d4c15770a48ab458607822494d3604b8fe05045e07135b186444dabe13d3f08ba37e8cf1a9106a559914c66f2d8a98009

Download Submit
C:\Users\Admin\AppData\Local\Temp\hurrok.exe

Filesize
1KB

MD5
1034b68f1e4b266a16479b8a95b60766

SHA1
330f439b2f698d2d1b86db7baddd2e71f565333b

SHA256
ff689b42290bf0fcff5338febadd3c594b6046d7c462ff4fa2d24d7e71f8cea9

SHA512
4e350eed2f642a16d09278329b535c5f965eb541952c2bd2888b0b25ca3565d96f6d5a0fd970bfa598e9f9f9811435c4304377a478d66d3b8d4d95f64d5063ef

Download Submit
memory/3668-19-0x0000000002130000-0x0000000002136000-memory.dmp

Filesize
24KB

Download
memory/4132-0-0x0000000000720000-0x0000000000726000-memory.dmp

Filesize
24KB

Download
memory/4132-1-0x0000000000720000-0x0000000000726000-memory.dmp

Filesize
24KB

Download
memory/4132-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download