9d0251c89691dfba179bd77586ee8d25445b14ee9fe0c791aef5d42059ffb974

Analysis

max time kernel
139s
max time network
145s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
04/02/2024, 06:35

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General

Target

2024-02-04_93c92a9d9164e06b9f5cff441ba9b4ef_cryptolocker.exe
Size

48KB
MD5

93c92a9d9164e06b9f5cff441ba9b4ef
SHA1

641caf2fa3907615fa99aac91ca92f981ca312e2
SHA256

9d0251c89691dfba179bd77586ee8d25445b14ee9fe0c791aef5d42059ffb974
SHA512

7b89922073462eb87452efd6f7c25344a85e306125b705e763b53415bf229a060f11df59cb24d37b208de7e5e7da31cec9e1fed3ab204b462b0a8e5765207adb
SSDEEP

1536:o1KhxqwtdgI2MyzNORQtOflIwoHNV2XBFV72BOlA7ZszsbKY1xzpAIW:aq7tdgI2MyzNORQtOflIwoHNV2XBFV7h

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x0007000000023113-12.dat	CryptoLocker_rule2

Detection of Cryptolocker Samples 1 IoCs

resource	yara_rule
behavioral2/files/0x0007000000023113-12.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-1-5-21-3073191680-435865314-2862784915-1000\Control Panel\International\Geo\Nation	2024-02-04_93c92a9d9164e06b9f5cff441ba9b4ef_cryptolocker.exe
Key value queried	\REGISTRY\USER\S-1-5-21-3073191680-435865314-2862784915-1000\Control Panel\International\Geo\Nation	hurok.exe

Executes dropped EXE 1 IoCs

pid	Process
2436	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 4776 wrote to memory of 2436	4776	2024-02-04_93c92a9d9164e06b9f5cff441ba9b4ef_cryptolocker.exe	84
PID 4776 wrote to memory of 2436	4776	2024-02-04_93c92a9d9164e06b9f5cff441ba9b4ef_cryptolocker.exe	84
PID 4776 wrote to memory of 2436	4776	2024-02-04_93c92a9d9164e06b9f5cff441ba9b4ef_cryptolocker.exe	84

C:\Users\Admin\AppData\Local\Temp\2024-02-04_93c92a9d9164e06b9f5cff441ba9b4ef_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-04_93c92a9d9164e06b9f5cff441ba9b4ef_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4776
- 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:2436

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
a617c99a6668461cc223d253deb27399

SHA1
9c56026e229946c9760bc44475499e8a0f6c2bea

SHA256
f6ed1db0be03710caa24d28d93572b3594b9f1dacea73bea4719f09562d2cb73

SHA512
966bb229677a9c1d5e75cec81d268b285ecde776d30620b2ae822feae12b0b1852353330194e60c5d9d5b83d4697a107bcd1b5d00f95db20864a74c283706d8a

Download Submit
memory/2436-20-0x0000000000590000-0x0000000000596000-memory.dmp

Filesize
24KB

Download
memory/4776-0-0x0000000002180000-0x0000000002186000-memory.dmp

Filesize
24KB

Download
memory/4776-1-0x0000000002180000-0x0000000002186000-memory.dmp

Filesize
24KB

Download
memory/4776-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download