442461307c1b896ca3db85523ab6cd42daa707bdfc9a83ca753064cedc04448b

Analysis

max time kernel
137s
max time network
158s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
25/01/2024, 07:23

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General

Target

2024-01-25_15cef82aa8ab0f6a3e38968b9469deec_cryptolocker.exe
Size

116KB
MD5

15cef82aa8ab0f6a3e38968b9469deec
SHA1

ee47c9502a87bd8abf17986b0db3244c4554e79f
SHA256

442461307c1b896ca3db85523ab6cd42daa707bdfc9a83ca753064cedc04448b
SHA512

54dc88044f47cd5220c60ea2f6eaa1a016dc4e1a909ed9065502c3132cb556d8220f20ddb063eb385254c48d19de589256716b02a032c7ff79799be42ba3ff0a
SSDEEP

1536:z6QFElP6n+gKmddpMOtEvwDpj3GYQbN/PKwNgp01kQL:z6a+CdOOtEvwDpjczP

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/1960-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0009000000022480-13.dat	CryptoLocker_rule2
behavioral2/memory/1960-24-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1428-25-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/1960-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0009000000022480-13.dat	CryptoLocker_set1
behavioral2/memory/1960-24-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1428-25-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/1960-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x0009000000022480-13.dat	UPX
behavioral2/memory/1960-24-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/1428-25-0x0000000000500000-0x0000000000510000-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-1-5-21-3073191680-435865314-2862784915-1000\Control Panel\International\Geo\Nation	2024-01-25_15cef82aa8ab0f6a3e38968b9469deec_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1428	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1960-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x0009000000022480-13.dat	upx
behavioral2/memory/1960-24-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/1428-25-0x0000000000500000-0x0000000000510000-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 1960 wrote to memory of 1428	1960	2024-01-25_15cef82aa8ab0f6a3e38968b9469deec_cryptolocker.exe	88
PID 1960 wrote to memory of 1428	1960	2024-01-25_15cef82aa8ab0f6a3e38968b9469deec_cryptolocker.exe	88
PID 1960 wrote to memory of 1428	1960	2024-01-25_15cef82aa8ab0f6a3e38968b9469deec_cryptolocker.exe	88

C:\Users\Admin\AppData\Local\Temp\2024-01-25_15cef82aa8ab0f6a3e38968b9469deec_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-01-25_15cef82aa8ab0f6a3e38968b9469deec_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1960
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1428

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

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Downloads

C:\Users\Admin\AppData\Local\Temp\asih.exe

Filesize
116KB

MD5
1dd03444846cebb697fabe466354675d

SHA1
3b6033b9f87cbd62b5093a7df1f719f6f36bd072

SHA256
ecf87545e09775f83eab0694e3b66c6054d49b645a72d27029d93f47c4b91b66

SHA512
a6056ce3a4dda16fd0ea1ec41a5547c3d68dc781479dd68f57d44ce16a482b0de4b7f484f66220275514a0852511b0da36a9fc30f947030bb64127b9a5f087b4

Download Submit
memory/1428-18-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/1428-25-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1960-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1960-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/1960-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/1960-3-0x00000000005E0000-0x00000000005E6000-memory.dmp

Filesize
24KB

Download
memory/1960-24-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download