83251526b0f77d346bf984d278603e068866c2e365c8c2dff2d6b5a7addab53f

Analysis

max time kernel
153s
max time network
161s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
11-03-2024 23:25

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General

Target

2024-03-11_4401f90487e2d0ab327f0070682a9cfa_cryptolocker.exe
Size

95KB
MD5

4401f90487e2d0ab327f0070682a9cfa
SHA1

bf678b8881ef3d51dba70caffd58cc347cdd4615
SHA256

83251526b0f77d346bf984d278603e068866c2e365c8c2dff2d6b5a7addab53f
SHA512

09d76bc618ce4b8af8da18606a55ab75a380ee11d2704748eb76b2200cf9d609fc251f5ada46191d3970942eeec60b0c12104b2568682db413d63a5f205c488f
SSDEEP

1536:qkmnpomddpMOtEvwDpjJGYQbN/PKwNgp01OM:AnBdOOtEvwDpj6zT

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/504-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x00050000000224ff-13.dat	CryptoLocker_rule2
behavioral2/memory/504-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4528-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/504-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x00050000000224ff-13.dat	CryptoLocker_set1
behavioral2/memory/504-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4528-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/504-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/files/0x00050000000224ff-13.dat	UPX
behavioral2/memory/504-17-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/4528-26-0x0000000000500000-0x000000000050F000-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-1-5-21-609813121-2907144057-1731107329-1000\Control Panel\International\Geo\Nation	2024-03-11_4401f90487e2d0ab327f0070682a9cfa_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4528	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/504-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/files/0x00050000000224ff-13.dat	upx
behavioral2/memory/504-17-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/4528-26-0x0000000000500000-0x000000000050F000-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 504 wrote to memory of 4528	504	2024-03-11_4401f90487e2d0ab327f0070682a9cfa_cryptolocker.exe	87
PID 504 wrote to memory of 4528	504	2024-03-11_4401f90487e2d0ab327f0070682a9cfa_cryptolocker.exe	87
PID 504 wrote to memory of 4528	504	2024-03-11_4401f90487e2d0ab327f0070682a9cfa_cryptolocker.exe	87

C:\Users\Admin\AppData\Local\Temp\2024-03-11_4401f90487e2d0ab327f0070682a9cfa_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-11_4401f90487e2d0ab327f0070682a9cfa_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:504
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4528

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
96KB

MD5
567445b2a2e36b4add24eb8105872505

SHA1
354ad93246fd30c956e4954b0e52e4d93b405063

SHA256
fa2cbb89fb65f8469dd0dc7f8262f0fdcdc7bded4d610e279e60f0d708d5249f

SHA512
fe39115bba2a573676d1da21aa9c29168e191a9b7182dcdb2582763726b28c0a57bdf082af72094ef22e6bab0e343806221f4352ce73b5e86d9b6fef145f40e2

Download Submit
memory/504-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/504-1-0x00000000005B0000-0x00000000005B6000-memory.dmp

Filesize
24KB

Download
memory/504-2-0x00000000005B0000-0x00000000005B6000-memory.dmp

Filesize
24KB

Download
memory/504-3-0x00000000005D0000-0x00000000005D6000-memory.dmp

Filesize
24KB

Download
memory/504-17-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/4528-19-0x00000000006D0000-0x00000000006D6000-memory.dmp

Filesize
24KB

Download
memory/4528-22-0x00000000006B0000-0x00000000006B6000-memory.dmp

Filesize
24KB

Download
memory/4528-26-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download