9f05e8d255ac1f37a6e18d6384240b8ef417f948814c36833a2197bcfdb53727

Analysis

max time kernel
149s
max time network
155s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
28/01/2024, 12:54

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General

Target

2024-01-28_fa01a96ce988accbada8a52e161e61f5_cryptolocker.exe
Size

86KB
MD5

fa01a96ce988accbada8a52e161e61f5
SHA1

8fcbd42189eff6e81be87b11f6e83d70c63cab8c
SHA256

9f05e8d255ac1f37a6e18d6384240b8ef417f948814c36833a2197bcfdb53727
SHA512

5203aec46813c11e407f943e5ff718ca61c6804d6706593d70173596dbb30ca2efcd724bd55ee85de1e21e91926d69106aea5cfa7acacfa8abb6becfe9f95d7e
SSDEEP

768:qkmnjFom/kLyMro2GtOOtEvwDpjeY10Y/YMsvlMdwPK80GQuchoIgtIq:qkmnpomddpMOtEvwDpjJGYQbN/PKwMgh

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/1832-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000600000002321f-13.dat	CryptoLocker_rule2
behavioral2/memory/1832-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3500-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/1832-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000600000002321f-13.dat	CryptoLocker_set1
behavioral2/memory/1832-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3500-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/1832-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/files/0x000600000002321f-13.dat	UPX
behavioral2/memory/1832-17-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/3500-26-0x0000000000500000-0x000000000050F000-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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-996941297-2279405024-2328152752-1000\Control Panel\International\Geo\Nation	2024-01-28_fa01a96ce988accbada8a52e161e61f5_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3500	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1832-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/files/0x000600000002321f-13.dat	upx
behavioral2/memory/1832-17-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/3500-26-0x0000000000500000-0x000000000050F000-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

description	pid	Process	procid_target
PID 1832 wrote to memory of 3500	1832	2024-01-28_fa01a96ce988accbada8a52e161e61f5_cryptolocker.exe	90
PID 1832 wrote to memory of 3500	1832	2024-01-28_fa01a96ce988accbada8a52e161e61f5_cryptolocker.exe	90
PID 1832 wrote to memory of 3500	1832	2024-01-28_fa01a96ce988accbada8a52e161e61f5_cryptolocker.exe	90

C:\Users\Admin\AppData\Local\Temp\2024-01-28_fa01a96ce988accbada8a52e161e61f5_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-01-28_fa01a96ce988accbada8a52e161e61f5_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1832
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3500

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
86KB

MD5
7c63c864b3868615a98c436e98a842b7

SHA1
92bff75a32e9edfdc7909904edec44989368312b

SHA256
a7d39cfff3ef4b0ea8ef004b260b402cd7851e9c369b6491c4123736b6fde20e

SHA512
e991e33dda3e833ddc1bb0ef82771cece9c756a98593f563b9c058bcdc43fb5abbfc2646eaf37e8f3a0a0182641178515e652f4496fd9312feaa183d07b8dc53

Download Submit
memory/1832-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/1832-1-0x0000000002060000-0x0000000002066000-memory.dmp

Filesize
24KB

Download
memory/1832-2-0x0000000002060000-0x0000000002066000-memory.dmp

Filesize
24KB

Download
memory/1832-3-0x0000000002080000-0x0000000002086000-memory.dmp

Filesize
24KB

Download
memory/1832-17-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/3500-19-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/3500-22-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/3500-26-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download