6d6266b8250696d1869ea41bd9d2f7222c16d597df0ec2b9a597017feed3c882

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240221-en
resource tags

arch:x64arch:x86image:win10v2004-20240221-enlocale:en-usos:windows10-2004-x64system
submitted
21/02/2024, 17:53

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General

Target

2024-02-21_79776ad6213c3e7aee59d99b49a8bb63_cryptolocker.exe
Size

77KB
MD5

79776ad6213c3e7aee59d99b49a8bb63
SHA1

0a826be0aa59261bbc58e64783f024d85e1f436f
SHA256

6d6266b8250696d1869ea41bd9d2f7222c16d597df0ec2b9a597017feed3c882
SHA512

525eee899337f88610af6fe295f3f856c65f40644576344ba2069e0ea421607644699c8c8b40a048caecddf4ffd958643b162cbbd53dba156c218c5770afe769
SSDEEP

1536:T6QFElP6n+gxmddpMOtEvwDpjwaxTNUOA+YSafiPuy:T6a+rdOOtEvwDpjNcc

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/4180-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0008000000023217-13.dat	CryptoLocker_rule2
behavioral2/memory/4180-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3164-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/4180-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0008000000023217-13.dat	CryptoLocker_set1
behavioral2/memory/4180-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3164-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/4180-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x0008000000023217-13.dat	UPX
behavioral2/memory/4180-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/3164-26-0x0000000000500000-0x0000000000510000-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-1-5-21-1712835645-2080934712-2142796781-1000\Control Panel\International\Geo\Nation	2024-02-21_79776ad6213c3e7aee59d99b49a8bb63_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3164	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4180-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x0008000000023217-13.dat	upx
behavioral2/memory/4180-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/3164-26-0x0000000000500000-0x0000000000510000-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 4180 wrote to memory of 3164	4180	2024-02-21_79776ad6213c3e7aee59d99b49a8bb63_cryptolocker.exe	86
PID 4180 wrote to memory of 3164	4180	2024-02-21_79776ad6213c3e7aee59d99b49a8bb63_cryptolocker.exe	86
PID 4180 wrote to memory of 3164	4180	2024-02-21_79776ad6213c3e7aee59d99b49a8bb63_cryptolocker.exe	86

C:\Users\Admin\AppData\Local\Temp\2024-02-21_79776ad6213c3e7aee59d99b49a8bb63_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-21_79776ad6213c3e7aee59d99b49a8bb63_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4180
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3164

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
77KB

MD5
f7aa6096826a398912e6136853a5473d

SHA1
81c6d506bbfa67c5d05c67e27283933e83379fd5

SHA256
f3d2d7fc0c33582da88691b6144659fad71039736c3eed301c05e66db72a522d

SHA512
222977837c692f609dcdb208f5eb48541025252022ccc9b898885a72bebba971a06711584ca3a0be1c9e55e614e35db7b1854a1914df756a0a3e29380f3111c7

Download Submit
memory/3164-19-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/3164-21-0x00000000004C0000-0x00000000004C6000-memory.dmp

Filesize
24KB

Download
memory/3164-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4180-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4180-1-0x0000000000610000-0x0000000000616000-memory.dmp

Filesize
24KB

Download
memory/4180-2-0x0000000000610000-0x0000000000616000-memory.dmp

Filesize
24KB

Download
memory/4180-3-0x0000000000640000-0x0000000000646000-memory.dmp

Filesize
24KB

Download
memory/4180-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download