f9548ecfa50579fbcaf836d1fd7324baf09f1175bfba2ced83d7f4cacfc6f5c8

Analysis

max time kernel
149s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20240412-en
resource tags

arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
submitted
18/04/2024, 12:51

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

2024-04-18_b0d78fa1303bfbf47502187938ce1e59_cryptolocker.exe
Size

65KB
MD5

b0d78fa1303bfbf47502187938ce1e59
SHA1

08810d8a1ea5810388ce848287321c5cb38cadaa
SHA256

f9548ecfa50579fbcaf836d1fd7324baf09f1175bfba2ced83d7f4cacfc6f5c8
SHA512

905cc0016dea721ab53c514c9dce3f476c33a2ff1bcefbd9bac2320978c57ff28b362059ab0853cf4e1c5050fca8ed9bd01320f8ba51a12abe3b00b35fba7997
SSDEEP

1536:P8mnK6QFElP6n+gymddpMOtEvwDpjYZ8xDYV:1nK6a+qdOOtEvwDpju

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/3752-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0005000000022a73-13.dat	CryptoLocker_rule2
behavioral2/memory/3752-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2600-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/3752-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0005000000022a73-13.dat	CryptoLocker_set1
behavioral2/memory/3752-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/memory/2600-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/3752-0-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/files/0x0005000000022a73-13.dat	UPX
behavioral2/memory/3752-17-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/memory/2600-26-0x0000000000500000-0x000000000050F311-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-1-5-21-776854024-226333264-2052258302-1000\Control Panel\International\Geo\Nation	2024-04-18_b0d78fa1303bfbf47502187938ce1e59_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2600	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3752-0-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/files/0x0005000000022a73-13.dat	upx
behavioral2/memory/3752-17-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/memory/2600-26-0x0000000000500000-0x000000000050F311-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 3752 wrote to memory of 2600	3752	2024-04-18_b0d78fa1303bfbf47502187938ce1e59_cryptolocker.exe	85
PID 3752 wrote to memory of 2600	3752	2024-04-18_b0d78fa1303bfbf47502187938ce1e59_cryptolocker.exe	85
PID 3752 wrote to memory of 2600	3752	2024-04-18_b0d78fa1303bfbf47502187938ce1e59_cryptolocker.exe	85

C:\Users\Admin\AppData\Local\Temp\2024-04-18_b0d78fa1303bfbf47502187938ce1e59_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-18_b0d78fa1303bfbf47502187938ce1e59_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3752
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2600

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

Loading Replay Monitor...

Downloads

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

Filesize
65KB

MD5
a095da4bcfe1699bf46415d07f2b7920

SHA1
840bd3526536169761c0c13f38e3daac1b9240ba

SHA256
d5589d43b6811dda76d8b256bdd6604f87173436ae35453c73812a8c3ca6748c

SHA512
8ed6394b195c30ff36d1664cd8de7cf40eb6ef8b88687e9580cadb5d1ace1b23fec0bee1149d231bcd8fe7ea8b892d75ca110b7ca9bd90bd418b37b1abf88022

Download Submit
memory/2600-20-0x00000000006D0000-0x00000000006D6000-memory.dmp

Filesize
24KB

Download
memory/2600-19-0x00000000006B0000-0x00000000006B6000-memory.dmp

Filesize
24KB

Download
memory/2600-26-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/3752-0-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/3752-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/3752-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/3752-3-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/3752-17-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download