0bb0ac6e04d513ecd135d626a9fdb415799bb0f69fe06411cd57ce3bf82c9444

Analysis

max time kernel
149s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
23-05-2024 02:29

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

2024-05-23_4ce8dace0240166cbaa7f0d501f93428_cryptolocker.exe
Size

78KB
MD5

4ce8dace0240166cbaa7f0d501f93428
SHA1

0295d218d54dfb1542b878687cc096b80075414f
SHA256

0bb0ac6e04d513ecd135d626a9fdb415799bb0f69fe06411cd57ce3bf82c9444
SHA512

160005251a263d1c0cd31c7a829b8c0378b2986e54875f2b62c164948bb51d233b4b5b9beaff9e63afdeb64e18e6e8430a787b4944a38266e3fa3a5b86dfedd0
SSDEEP

1536:T6QFElP6n+gxmddpMOtEvwDpjwaxTNUOAkXtBdxPUxB1FN:T6a+rdOOtEvwDpjNtHPU

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4144-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral2/memory/820-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4144-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/820-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4144-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral2/memory/820-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4144-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/820-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4144-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral2/memory/820-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4144-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/820-27-0x0000000000500000-0x0000000000510000-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

Processes:

2024-05-23_4ce8dace0240166cbaa7f0d501f93428_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3571316656-3665257725-2415531812-1000\Control Panel\International\Geo\Nation	2024-05-23_4ce8dace0240166cbaa7f0d501f93428_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

820 asih.exe

pid	process
820	asih.exe

UPX packed file 5 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/4144-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral2/memory/820-18-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/4144-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/820-27-0x0000000000500000-0x0000000000510000-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

Processes:

2024-05-23_4ce8dace0240166cbaa7f0d501f93428_cryptolocker.exe

description	pid	process	target process
PID 4144 wrote to memory of 820	4144	2024-05-23_4ce8dace0240166cbaa7f0d501f93428_cryptolocker.exe	asih.exe
PID 4144 wrote to memory of 820	4144	2024-05-23_4ce8dace0240166cbaa7f0d501f93428_cryptolocker.exe	asih.exe
PID 4144 wrote to memory of 820	4144	2024-05-23_4ce8dace0240166cbaa7f0d501f93428_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-23_4ce8dace0240166cbaa7f0d501f93428_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-23_4ce8dace0240166cbaa7f0d501f93428_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4144

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:820

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
78KB

MD5
7fa04fb1761d4f2cc405113bf9c3b4cd

SHA1
7118f4e7be5ae532d1d272ddd1fa70ecfde39dae

SHA256
014e4d17c387679966c4803577b9b68017e7d5cd608bef033377853312e64586

SHA512
efa0abb02ed10a5e1c141159b19b1d869e64c92a5aade5d7e2bc8c967da4c34df38a8f9f38c422d53497ae43c21eaddf46bb17616bb40cca4fcc5c5f4bfdf93d

Download Submit
memory/820-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/820-20-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/820-26-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/820-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4144-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4144-1-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/4144-2-0x00000000007D0000-0x00000000007D6000-memory.dmp

Filesize
24KB

Download
memory/4144-9-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/4144-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download