7e3bfec2f5a8bbabaa8c07f34827e0233b677f006b0e36aef2e680ac8546c35b

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
17/02/2024, 18:33

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General

Target

2024-02-17_6e57ca02687c3ad7bb1476985951de3e_cryptolocker.exe
Size

82KB
MD5

6e57ca02687c3ad7bb1476985951de3e
SHA1

e2f34655eef39fd29261533aa6ea3860342c3454
SHA256

7e3bfec2f5a8bbabaa8c07f34827e0233b677f006b0e36aef2e680ac8546c35b
SHA512

a48866bac2132aa01f2f963080053da1900e73c61c207bc0dc1c948961320ac7e50b6af0a100e29c8898073497eb3757c6ce4e42dcd2f812ca9a2b25635325ed
SSDEEP

1536:T6QFElP6n+gxmddpMOtEvwDpjwaxTNUOT7WAZ:T6a+rdOOtEvwDpjNV

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/4844-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0006000000023228-13.dat	CryptoLocker_rule2
behavioral2/memory/4844-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/5020-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/4844-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0006000000023228-13.dat	CryptoLocker_set1
behavioral2/memory/4844-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/5020-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/4844-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x0006000000023228-13.dat	UPX
behavioral2/memory/4844-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/5020-26-0x0000000000500000-0x0000000000510000-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-1-5-21-3336304223-2978740688-3645194410-1000\Control Panel\International\Geo\Nation	2024-02-17_6e57ca02687c3ad7bb1476985951de3e_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
5020	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4844-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x0006000000023228-13.dat	upx
behavioral2/memory/4844-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/5020-26-0x0000000000500000-0x0000000000510000-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 4844 wrote to memory of 5020	4844	2024-02-17_6e57ca02687c3ad7bb1476985951de3e_cryptolocker.exe	83
PID 4844 wrote to memory of 5020	4844	2024-02-17_6e57ca02687c3ad7bb1476985951de3e_cryptolocker.exe	83
PID 4844 wrote to memory of 5020	4844	2024-02-17_6e57ca02687c3ad7bb1476985951de3e_cryptolocker.exe	83

C:\Users\Admin\AppData\Local\Temp\2024-02-17_6e57ca02687c3ad7bb1476985951de3e_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-17_6e57ca02687c3ad7bb1476985951de3e_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4844
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:5020

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
82KB

MD5
4a9712a469d1564f1a3d441b3da0cd00

SHA1
3445025d464cb54fbfa3811debf9a0f08da8484a

SHA256
1f3198e428ab77cfdd8e3442b3f19120a202fcf34cc717536652a3aa137cdbdc

SHA512
5852cd2f10e78f955200d288f8034870dbfb38fbf17fcbcc108b806027262fbc033e73685a0552453f4f90ce86af3db72151b930cd7b214d7ce2bed32cb59f2c

Download Submit
memory/4844-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4844-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/4844-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/4844-3-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/4844-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/5020-20-0x0000000002100000-0x0000000002106000-memory.dmp

Filesize
24KB

Download
memory/5020-19-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/5020-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download