aefedd95507b889faf7f051bb3f9d327e6d4b4db2cd86af6b5bd0efb6b3a877b

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20231222-en
resource tags

arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system
submitted
25-01-2024 21:27

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General

Target

2024-01-25_df359b6001466d6a7e5ebb11f4d20dc7_cryptolocker.exe
Size

68KB
MD5

df359b6001466d6a7e5ebb11f4d20dc7
SHA1

c126737f5e3fa385aa3051768fac83b3f9ba3beb
SHA256

aefedd95507b889faf7f051bb3f9d327e6d4b4db2cd86af6b5bd0efb6b3a877b
SHA512

d2a03aef9c7ba74dfb45ddf5fccbcbf8dc89f6996782ddaf8296992a9ca990bcb63e9791dfb15f2312e1e5bad07fc44b2949f025802f95bc1ced6d18a775926f
SSDEEP

1536:Dk/xY0sllyGQMOtEvwDpjwycDtKkQZQRKb61vSbgZ3QzNKU9:DW60sllyWOtEvwDpjwF85T

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 3 IoCs

resource	yara_rule
behavioral2/memory/1340-0-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x00070000000231f9-13.dat	CryptoLocker_rule2
behavioral2/memory/1340-17-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 3 IoCs

resource	yara_rule
behavioral2/memory/1340-0-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x00070000000231f9-13.dat	CryptoLocker_set1
behavioral2/memory/1340-17-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_set1

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-1-5-21-3803511929-1339359695-2191195476-1000\Control Panel\International\Geo\Nation	2024-01-25_df359b6001466d6a7e5ebb11f4d20dc7_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4252	asih.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 1340 wrote to memory of 4252	1340	2024-01-25_df359b6001466d6a7e5ebb11f4d20dc7_cryptolocker.exe	86
PID 1340 wrote to memory of 4252	1340	2024-01-25_df359b6001466d6a7e5ebb11f4d20dc7_cryptolocker.exe	86
PID 1340 wrote to memory of 4252	1340	2024-01-25_df359b6001466d6a7e5ebb11f4d20dc7_cryptolocker.exe	86

C:\Users\Admin\AppData\Local\Temp\2024-01-25_df359b6001466d6a7e5ebb11f4d20dc7_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-01-25_df359b6001466d6a7e5ebb11f4d20dc7_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1340
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4252

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\asih.exe

Filesize
68KB

MD5
c30987292e64e1e123ad772d17960331

SHA1
2d7b90680be68bfab2a0289c583fd023e3036e0d

SHA256
98f5cdef9a9b3b1202b1ff3a39dacf7052ea6ea83ae46ffd30fafe105dbe9ddb

SHA512
49b3048f6a0dfb4aea975436b8d6a777b3dae89fc8499c707291084723894d887c39f888c0969faac7ebdac2927127f6d28d5b1d138436c4561406da01514193

Download Submit
memory/1340-0-0x0000000000500000-0x000000000050B000-memory.dmp

Filesize
44KB

Download
memory/1340-1-0x00000000005E0000-0x00000000005E6000-memory.dmp

Filesize
24KB

Download
memory/1340-2-0x00000000005E0000-0x00000000005E6000-memory.dmp

Filesize
24KB

Download
memory/1340-3-0x0000000000600000-0x0000000000606000-memory.dmp

Filesize
24KB

Download
memory/1340-17-0x0000000000500000-0x000000000050B000-memory.dmp

Filesize
44KB

Download
memory/4252-19-0x0000000001F70000-0x0000000001F76000-memory.dmp

Filesize
24KB

Download
memory/4252-23-0x0000000000800000-0x0000000000806000-memory.dmp

Filesize
24KB

Download