44f02259fc6644458354305ab08eff281d162e460bdc12411f589dd20b567adb

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
29/05/2024, 06:51

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General

Target

2024-05-29_c11c407ac30f2b089fe5fddc8ea8beb7_cryptolocker.exe
Size

60KB
MD5

c11c407ac30f2b089fe5fddc8ea8beb7
SHA1

3a2ba2b5f494f0c5080c582aefc064ffdcd8f169
SHA256

44f02259fc6644458354305ab08eff281d162e460bdc12411f589dd20b567adb
SHA512

6fc53b715617a04f888cf87a8ef86cf6e15467207904e421fcc955adcc064f64e1d452b3e65385cd3467dbc6b07b2a4d7cfe80df2b9f7b54afdc7dc9f1284a10
SSDEEP

768:H6LsoEEeegiZPvEhHSG+gk5NQXtckstOOtEvwDpjhBaD3TUogs/VXpAP6pINx:H6QFElP6n+gou9cvMOtEvwDpjCpVXiNx

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/2124-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0006000000023270-13.dat	CryptoLocker_rule2
behavioral2/memory/2120-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2124-25-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2120-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral2/memory/2124-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0006000000023270-13.dat	CryptoLocker_set1
behavioral2/memory/2120-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2124-25-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2120-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/2124-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x0006000000023270-13.dat	UPX
behavioral2/memory/2120-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/2124-25-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/2120-26-0x0000000000500000-0x0000000000510000-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-1-5-21-2539840389-1261165778-1087677076-1000\Control Panel\International\Geo\Nation	2024-05-29_c11c407ac30f2b089fe5fddc8ea8beb7_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2120	asih.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2124-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x0006000000023270-13.dat	upx
behavioral2/memory/2120-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/2124-25-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/2120-26-0x0000000000500000-0x0000000000510000-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 2124 wrote to memory of 2120	2124	2024-05-29_c11c407ac30f2b089fe5fddc8ea8beb7_cryptolocker.exe	85
PID 2124 wrote to memory of 2120	2124	2024-05-29_c11c407ac30f2b089fe5fddc8ea8beb7_cryptolocker.exe	85
PID 2124 wrote to memory of 2120	2124	2024-05-29_c11c407ac30f2b089fe5fddc8ea8beb7_cryptolocker.exe	85

C:\Users\Admin\AppData\Local\Temp\2024-05-29_c11c407ac30f2b089fe5fddc8ea8beb7_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-29_c11c407ac30f2b089fe5fddc8ea8beb7_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2124
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2120

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
60KB

MD5
3dce5386bfb175944036777c7e0dddd7

SHA1
c93d8c808e0e9df8ca695027c0c02c60afb5b5e3

SHA256
eae2fd113cbbc418fa423190e664fd7fb12238240928301956b9fedea10905a4

SHA512
c91d5fd40a55685ba90e3772002cb2162bcfb55a5236606f269b998046da3bb61d488c8e03844240feb1dd10a2d1d6b6fb3c2f120c7a6c0a0a938b91233eaf14

Download Submit
memory/2120-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2120-19-0x0000000002000000-0x0000000002006000-memory.dmp

Filesize
24KB

Download
memory/2120-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2124-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2124-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/2124-2-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/2124-9-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/2124-25-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

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