388602da09825b91525ec6bf5770a975ecc1f5cc7d77bab7a7e5258ef38df011

Analysis

max time kernel
87s
max time network
151s
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, 04:01

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General

Target

2024-02-14_875f86613f4d999a295aee9ccdcdea0e_cryptolocker.exe
Size

49KB
MD5

875f86613f4d999a295aee9ccdcdea0e
SHA1

a4e5b3fd8c8bbb79fbca72a48b94181ec877d061
SHA256

388602da09825b91525ec6bf5770a975ecc1f5cc7d77bab7a7e5258ef38df011
SHA512

1cef82560b3bf79b79b67cdb6a1d448a5ea7585bae62da0db9ff46bd8b4b93dc6ffb0e1831bd850b131c3aa407f4ccfdf929031265510e4d845a65d818c0944d
SSDEEP

1536:o1KhxqwtdgI2MyzNORQtOflIwoHNV2XBFV72BOlA7ZszsbKY1xzpAI3:aq7tdgI2MyzNORQtOflIwoHNV2XBFV7E

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x0007000000023213-12.dat	CryptoLocker_rule2

Detection of Cryptolocker Samples 1 IoCs

resource	yara_rule
behavioral2/files/0x0007000000023213-12.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-1-5-21-635608581-3370340891-292606865-1000\Control Panel\International\Geo\Nation	2024-02-14_875f86613f4d999a295aee9ccdcdea0e_cryptolocker.exe
Key value queried	\REGISTRY\USER\S-1-5-21-635608581-3370340891-292606865-1000\Control Panel\International\Geo\Nation	hurok.exe

Executes dropped EXE 1 IoCs

pid	Process
5056	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 3724 wrote to memory of 5056	3724	2024-02-14_875f86613f4d999a295aee9ccdcdea0e_cryptolocker.exe	84
PID 3724 wrote to memory of 5056	3724	2024-02-14_875f86613f4d999a295aee9ccdcdea0e_cryptolocker.exe	84
PID 3724 wrote to memory of 5056	3724	2024-02-14_875f86613f4d999a295aee9ccdcdea0e_cryptolocker.exe	84

C:\Users\Admin\AppData\Local\Temp\2024-02-14_875f86613f4d999a295aee9ccdcdea0e_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-14_875f86613f4d999a295aee9ccdcdea0e_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3724
- 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:5056

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
49KB

MD5
3eb54678791bd7e4cb0fdadd05fbdcd9

SHA1
2c3c48463673f4f3c37756311b4c78c6f831297f

SHA256
5503039eeb103af9c8afb9e8dbb6acc30dddfa1a9cd4e93a5f64644845a2d2c6

SHA512
130b84546935d4183ab02f04b8db2033ffd909f1782048ac250fc00deb220a638ed7d5e0c6c114f0c018d1a3855484f9f25344c7901b6bcd3914d7d9fc977cbd

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

Filesize
1KB

MD5
da313dde715c72369e4edf6836f83cbb

SHA1
25c9fc0b6d1736a5bff0ace02697986f54ec9330

SHA256
e1f7149f1eda0da19369a9cac0f064dda0278c04ab54c260a6d078819108e6a4

SHA512
eaa22953ce8d747b714e4eb954209fe1b33cb11a7b2d1963a261f15c1790e5e8762db2a271e36ee96e2691041e7a94984404a840d3e5ee392c2d14411d2e1317

Download Submit
memory/3724-0-0x00000000006E0000-0x00000000006E6000-memory.dmp

Filesize
24KB

Download
memory/3724-1-0x00000000006E0000-0x00000000006E6000-memory.dmp

Filesize
24KB

Download
memory/3724-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/5056-21-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download