0b8d29bb74021bd9b0d0108c67d0526da45545cf54079375cd60ba66d3701f46

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
22-05-2024 03:36

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

2024-05-22_fb10beca7aa226900443a4f8bf5dc2c5_cryptolocker.exe
Size

88KB
MD5

fb10beca7aa226900443a4f8bf5dc2c5
SHA1

81a1908ddec058b08ae623f91b4e490a0d0f8aab
SHA256

0b8d29bb74021bd9b0d0108c67d0526da45545cf54079375cd60ba66d3701f46
SHA512

c3581d8fbb0b0a24f568a77be8c0e18d9619ababf51cb098887b6d20cf0fc15e6d6e7e25ff7d543b524dd12c6803389254974408220d8bfdca6611358ef49c1c
SSDEEP

768:qkmnjFom/kLyMro2GtOOtEvwDpjeY10Y/YMsvlMdwPK80GQuchoIgtIODZ:qkmnpomddpMOtEvwDpjJGYQbN/PKwMgH

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2116-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral2/memory/2116-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4776-27-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2116-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral2/memory/2116-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4776-27-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2116-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral2/memory/2116-17-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/4776-27-0x0000000000500000-0x000000000050F000-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:

2024-05-22_fb10beca7aa226900443a4f8bf5dc2c5_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation	2024-05-22_fb10beca7aa226900443a4f8bf5dc2c5_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

4776 asih.exe

pid	process
4776	asih.exe

UPX packed file 4 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/2116-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral2/memory/2116-17-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/4776-27-0x0000000000500000-0x000000000050F000-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:

2024-05-22_fb10beca7aa226900443a4f8bf5dc2c5_cryptolocker.exe

description	pid	process	target process
PID 2116 wrote to memory of 4776	2116	2024-05-22_fb10beca7aa226900443a4f8bf5dc2c5_cryptolocker.exe	asih.exe
PID 2116 wrote to memory of 4776	2116	2024-05-22_fb10beca7aa226900443a4f8bf5dc2c5_cryptolocker.exe	asih.exe
PID 2116 wrote to memory of 4776	2116	2024-05-22_fb10beca7aa226900443a4f8bf5dc2c5_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-22_fb10beca7aa226900443a4f8bf5dc2c5_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-22_fb10beca7aa226900443a4f8bf5dc2c5_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2116
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4776

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
88KB

MD5
0daeb7fd01fde5684d1636130c33a314

SHA1
683a9591ccf88b07814a296535e8b9dc94758817

SHA256
463767540f851bd48b6d2f0d1656771891fa40c0f9fc89c29643234ce6553b0f

SHA512
9f12911f0c4322d5500c8970b2344c297aa0bd66d04cf580ec4a7a949741c4698f74510ec7f6eb7f0685376ee0df45851b405b9b96479d071302569ab45c50ba

Download Submit
memory/2116-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2116-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/2116-2-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/2116-9-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/2116-17-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/4776-20-0x0000000002070000-0x0000000002076000-memory.dmp

Filesize
24KB

Download
memory/4776-26-0x00000000007B0000-0x00000000007B6000-memory.dmp

Filesize
24KB

Download
memory/4776-27-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download