12358b1a6759b4e8e9448b2d9b4ad2d2c81860582b0159f0866ba4784af45f67

Analysis

max time kernel
148s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20240412-en
resource tags

arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
submitted
19/04/2024, 20:30

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General

Target

2024-04-19_2a9ba88e12a09f20db3b7e814798cd30_cryptolocker.exe
Size

96KB
MD5

2a9ba88e12a09f20db3b7e814798cd30
SHA1

55b26d3613cc1665c69e9e15bb04d28f8621fc3f
SHA256

12358b1a6759b4e8e9448b2d9b4ad2d2c81860582b0159f0866ba4784af45f67
SHA512

4546cdb820e5e74b8622681813e3fc6b8054ef0e0d2959cff3bd7556ae00d07a7b34a2f785a471d73d7046fcbc695684ec591e97775bb288a263dbf0efdde4be
SSDEEP

1536:zj+soPSMOtEvwDpj4ktBl01hJl8QAPM8Ho6cRDjgx/bq2:zCsanOtEvwDpjBP

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/4360-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000300000001e9b1-13.dat	CryptoLocker_rule2
behavioral2/memory/4360-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/760-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/760-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral2/memory/4360-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000300000001e9b1-13.dat	CryptoLocker_set1
behavioral2/memory/4360-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/760-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/760-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/4360-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000300000001e9b1-13.dat	UPX
behavioral2/memory/4360-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/760-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/760-27-0x0000000000500000-0x0000000000510000-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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-4084619521-2220719027-1909462854-1000\Control Panel\International\Geo\Nation	2024-04-19_2a9ba88e12a09f20db3b7e814798cd30_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
760	misid.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4360-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x000300000001e9b1-13.dat	upx
behavioral2/memory/4360-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/760-18-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/760-27-0x0000000000500000-0x0000000000510000-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

description	pid	Process	procid_target
PID 4360 wrote to memory of 760	4360	2024-04-19_2a9ba88e12a09f20db3b7e814798cd30_cryptolocker.exe	89
PID 4360 wrote to memory of 760	4360	2024-04-19_2a9ba88e12a09f20db3b7e814798cd30_cryptolocker.exe	89
PID 4360 wrote to memory of 760	4360	2024-04-19_2a9ba88e12a09f20db3b7e814798cd30_cryptolocker.exe	89

C:\Users\Admin\AppData\Local\Temp\2024-04-19_2a9ba88e12a09f20db3b7e814798cd30_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-19_2a9ba88e12a09f20db3b7e814798cd30_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4360
- C:\Users\Admin\AppData\Local\Temp\misid.exe
  "C:\Users\Admin\AppData\Local\Temp\misid.exe"
  2⤵
  - Executes dropped EXE
  PID:760

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\misid.exe

Filesize
96KB

MD5
3995cd3211ed657a79ce7bbb8aca6f93

SHA1
4a61c75facc5e5090beb8ca1501d767c8b7ee9e4

SHA256
659cd862005ad4bf80a7569859ab4be235505a356aa2de80ef01441d909bd3bd

SHA512
23bab0d3b63fc80840a47822c713d491d754ec02469378b6a7a96c265f2c65e30f9086a4375c6328b0006eea359169c168e9b3a9f6be65af18efc32cfd8fe78a

Download Submit
memory/760-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/760-20-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/760-26-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/760-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4360-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4360-1-0x00000000005E0000-0x00000000005E6000-memory.dmp

Filesize
24KB

Download
memory/4360-2-0x00000000005E0000-0x00000000005E6000-memory.dmp

Filesize
24KB

Download
memory/4360-3-0x0000000000600000-0x0000000000606000-memory.dmp

Filesize
24KB

Download
memory/4360-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download