3704f84a27f8b80bdb1b2519802f75948b0282e13d8e67a6a8f9fb4d34c9a6d5

Analysis

max time kernel
172s
max time network
194s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
18/01/2024, 23:36

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General

Target

2024-01-18_fb88ec790020af0ded1271362216c574_cryptolocker.exe
Size

92KB
MD5

fb88ec790020af0ded1271362216c574
SHA1

2f3a1aa5919dff2aac0b3fb7083ad7b11e93bb2b
SHA256

3704f84a27f8b80bdb1b2519802f75948b0282e13d8e67a6a8f9fb4d34c9a6d5
SHA512

f2036d63caf28c78fcad5b1f75bd3d53a10c908f7c67b96d7e47d639a793f355b8f684026db6d07db526032703cdb9197a21908c200c67678d3284789f732d40
SSDEEP

1536:qkmnpomddpMOtEvwDpjJGYQbN/PKwNgp01r:AnBdOOtEvwDpj6zZ

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/1332-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x001800000001e2b4-13.dat	CryptoLocker_rule2
behavioral2/memory/1332-14-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/408-27-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/1332-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x001800000001e2b4-13.dat	CryptoLocker_set1
behavioral2/memory/1332-14-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/408-27-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/1332-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/files/0x001800000001e2b4-13.dat	UPX
behavioral2/memory/1332-14-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/408-27-0x0000000000500000-0x000000000050F000-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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3073191680-435865314-2862784915-1000\Control Panel\International\Geo\Nation	2024-01-18_fb88ec790020af0ded1271362216c574_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
408	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1332-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/files/0x001800000001e2b4-13.dat	upx
behavioral2/memory/1332-14-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/408-27-0x0000000000500000-0x000000000050F000-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

description	pid	Process	procid_target
PID 1332 wrote to memory of 408	1332	2024-01-18_fb88ec790020af0ded1271362216c574_cryptolocker.exe	90
PID 1332 wrote to memory of 408	1332	2024-01-18_fb88ec790020af0ded1271362216c574_cryptolocker.exe	90
PID 1332 wrote to memory of 408	1332	2024-01-18_fb88ec790020af0ded1271362216c574_cryptolocker.exe	90

C:\Users\Admin\AppData\Local\Temp\2024-01-18_fb88ec790020af0ded1271362216c574_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-01-18_fb88ec790020af0ded1271362216c574_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1332
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:408

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
92KB

MD5
d3d04fbb93b85d32afddd5adfbf2c6d1

SHA1
f2d129da2e17538489e04d7a3a872baa4b83f326

SHA256
7806d9c155fcc4fc5b032b5e16334f8fae4060ef14a928d38d8286b1e6358354

SHA512
2b52cc3e6e701ac343f92a7fe763f62ca464e3f0f478cbd2cd737679fa0430ca5098162aab4507b75af44b64a1b7bbf764308146e317ca807e34f11e43e8a084

Download Submit
memory/408-21-0x00000000005D0000-0x00000000005D6000-memory.dmp

Filesize
24KB

Download
memory/408-20-0x00000000005B0000-0x00000000005B6000-memory.dmp

Filesize
24KB

Download
memory/408-27-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/1332-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/1332-1-0x0000000000740000-0x0000000000746000-memory.dmp

Filesize
24KB

Download
memory/1332-2-0x0000000000740000-0x0000000000746000-memory.dmp

Filesize
24KB

Download
memory/1332-3-0x0000000000760000-0x0000000000766000-memory.dmp

Filesize
24KB

Download
memory/1332-14-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download