5b13812e39af08f51b104ab40d901fe4c4bb6d95fd134e373cf3546ab5821b1a

Analysis

max time kernel
149s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
24/05/2024, 01:25

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General

Target

2024-05-24_1cffaf83707e9c6aaa7faca986e2cc19_cryptolocker.exe
Size

59KB
MD5

1cffaf83707e9c6aaa7faca986e2cc19
SHA1

1c5a3c7bd05c14e1af6c6f52cd7b008c6255cbb5
SHA256

5b13812e39af08f51b104ab40d901fe4c4bb6d95fd134e373cf3546ab5821b1a
SHA512

a804e97f0e68a16a062bfd6eaeebfb823457a765f2b5221990cd3d538b3e7e466a2f5c55f11008c6b71f70dd806a96c6ebca6a704211b6692f0c544e76a46081
SSDEEP

768:H6LsoEEeegiZPvEhHSG+gk5NQXtckstOOtEvwDpjhBaD3TUogs/VXpAPB3I:H6QFElP6n+gou9cvMOtEvwDpjCpVXYY

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/2488-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000b0000000233c3-13.dat	CryptoLocker_rule2
behavioral2/memory/2488-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2348-25-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/2488-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000b0000000233c3-13.dat	CryptoLocker_set1
behavioral2/memory/2488-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2348-25-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/2488-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000b0000000233c3-13.dat	UPX
behavioral2/memory/2488-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/2348-25-0x0000000000500000-0x0000000000510000-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-1-5-21-3906287020-2915474608-1755617787-1000\Control Panel\International\Geo\Nation	2024-05-24_1cffaf83707e9c6aaa7faca986e2cc19_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2348	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2488-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x000b0000000233c3-13.dat	upx
behavioral2/memory/2488-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/2348-25-0x0000000000500000-0x0000000000510000-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 2488 wrote to memory of 2348	2488	2024-05-24_1cffaf83707e9c6aaa7faca986e2cc19_cryptolocker.exe	83
PID 2488 wrote to memory of 2348	2488	2024-05-24_1cffaf83707e9c6aaa7faca986e2cc19_cryptolocker.exe	83
PID 2488 wrote to memory of 2348	2488	2024-05-24_1cffaf83707e9c6aaa7faca986e2cc19_cryptolocker.exe	83

C:\Users\Admin\AppData\Local\Temp\2024-05-24_1cffaf83707e9c6aaa7faca986e2cc19_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-24_1cffaf83707e9c6aaa7faca986e2cc19_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2488
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2348

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
59KB

MD5
0463d046aeae9b213f20a7e4f467c957

SHA1
6e5ad0221bba0909a5c13d7c04a11e5948ddc9be

SHA256
ce793f5f889a8e8628fae225ea6888eb11a4b00847ba5c06a55fad69fe416b1f

SHA512
4a6c058a913e599d0d9c48c31946921a2307d3b90b9379d8ee2f167121f9d338a3163413b667ce0d34c23a0e2852255f194001611ada7023e86210446a17a937

Download Submit
memory/2348-25-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2488-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2488-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/2488-2-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/2488-9-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/2488-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download