621a76e010da44a2ed48b1d5dd59f65c2c0a32ee6076393d4909cdd415f90253

Analysis

max time kernel
149s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
27/04/2024, 19:06

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General

Target

2024-04-27_f84c030f32b902b3dd7bacb7c4a69060_cryptolocker.exe
Size

22KB
MD5

f84c030f32b902b3dd7bacb7c4a69060
SHA1

a618a22ee68bd95c742918334a6749056e0a941f
SHA256

621a76e010da44a2ed48b1d5dd59f65c2c0a32ee6076393d4909cdd415f90253
SHA512

353e6f13023cec677d5bf7346960e8f70fe3eb74df5ac4b69eddf1210d54a2ff5b965d0f4dc188af1d0829bb4c4218d8bafdc67bdc2712c65c4c95dd650e8db6
SSDEEP

384:bVCPwFRuFn65arz1ZhdaXFXSCVQTLfjDp6HjI:bVCPwFRo6CpwXFXSqQXfjAU

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/4396-0-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0009000000023410-13.dat	CryptoLocker_rule2
behavioral2/memory/3524-16-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4396-19-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3524-28-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/4396-0-0x0000000008000000-0x000000000800E000-memory.dmp	UPX
behavioral2/files/0x0009000000023410-13.dat	UPX
behavioral2/memory/3524-16-0x0000000008000000-0x000000000800E000-memory.dmp	UPX
behavioral2/memory/4396-19-0x0000000008000000-0x000000000800E000-memory.dmp	UPX
behavioral2/memory/3524-28-0x0000000008000000-0x000000000800E000-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-1-5-21-3906287020-2915474608-1755617787-1000\Control Panel\International\Geo\Nation	2024-04-27_f84c030f32b902b3dd7bacb7c4a69060_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3524	hasfj.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4396-0-0x0000000008000000-0x000000000800E000-memory.dmp	upx
behavioral2/files/0x0009000000023410-13.dat	upx
behavioral2/memory/3524-16-0x0000000008000000-0x000000000800E000-memory.dmp	upx
behavioral2/memory/4396-19-0x0000000008000000-0x000000000800E000-memory.dmp	upx
behavioral2/memory/3524-28-0x0000000008000000-0x000000000800E000-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 4396 wrote to memory of 3524	4396	2024-04-27_f84c030f32b902b3dd7bacb7c4a69060_cryptolocker.exe	81
PID 4396 wrote to memory of 3524	4396	2024-04-27_f84c030f32b902b3dd7bacb7c4a69060_cryptolocker.exe	81
PID 4396 wrote to memory of 3524	4396	2024-04-27_f84c030f32b902b3dd7bacb7c4a69060_cryptolocker.exe	81

C:\Users\Admin\AppData\Local\Temp\2024-04-27_f84c030f32b902b3dd7bacb7c4a69060_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-27_f84c030f32b902b3dd7bacb7c4a69060_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4396
- C:\Users\Admin\AppData\Local\Temp\hasfj.exe
  "C:\Users\Admin\AppData\Local\Temp\hasfj.exe"
  2⤵
  - Executes dropped EXE
  PID:3524

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\hasfj.exe

Filesize
23KB

MD5
e16d1c6c526eeaf95b1c6c44e0682b53

SHA1
2811f7fad5f933ffa82b122db1c906508f5e31e2

SHA256
768beeda053dee6a340fe02c88d17c5c9352384a5b5af49fc9c3c90fd4a8fb5f

SHA512
99d86056043d2f9006fa6b6f02d508d780b6b97663623646021f0ccfc767b6a6bb1ba99da09ae222562e51abf1d77c505aee0d6e2747149097b0b0301818206f

Download Submit
memory/3524-16-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download
memory/3524-27-0x00000000006F0000-0x00000000006F6000-memory.dmp

Filesize
24KB

Download
memory/3524-21-0x00000000023C0000-0x00000000023C6000-memory.dmp

Filesize
24KB

Download
memory/3524-28-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download
memory/4396-0-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download
memory/4396-1-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

Filesize
24KB

Download
memory/4396-2-0x0000000003150000-0x0000000003156000-memory.dmp

Filesize
24KB

Download
memory/4396-9-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

Filesize
24KB

Download
memory/4396-19-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download