c2dd730e5a16b0ee55ced6869351ad49f4a640d4ce674bf9bf82e3fff45f0eff

Analysis

max time kernel
148s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
23-05-2024 02:33

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General

Target

2024-05-23_79812cd4473f1692ab1dd72c07aee83b_cryptolocker.exe
Size

78KB
MD5

79812cd4473f1692ab1dd72c07aee83b
SHA1

b04a89e3c277b9b169e8ce5dbf91b125a698bbd3
SHA256

c2dd730e5a16b0ee55ced6869351ad49f4a640d4ce674bf9bf82e3fff45f0eff
SHA512

38739ced536290583e070d2dadb584700bd6f2bb4c628269744c2e6f96afe5e06e301b1d930443c10036b66375c09b1cb0e0717563d5b0c3086f12a02279b7fb
SSDEEP

1536:T6QFElP6n+gxmddpMOtEvwDpjwaxTNUOAkXtBdxPUxB1Fe:T6a+rdOOtEvwDpjNtHPr

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/3080-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral2/memory/3080-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3076-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/3080-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral2/memory/3080-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3076-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/3080-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral2/memory/3080-16-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/3076-26-0x0000000000500000-0x0000000000510000-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

Processes:

2024-05-23_79812cd4473f1692ab1dd72c07aee83b_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3571316656-3665257725-2415531812-1000\Control Panel\International\Geo\Nation	2024-05-23_79812cd4473f1692ab1dd72c07aee83b_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

3076 asih.exe

pid	process
3076	asih.exe

UPX packed file 4 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/3080-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral2/memory/3080-16-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/3076-26-0x0000000000500000-0x0000000000510000-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

Processes:

2024-05-23_79812cd4473f1692ab1dd72c07aee83b_cryptolocker.exe

description	pid	process	target process
PID 3080 wrote to memory of 3076	3080	2024-05-23_79812cd4473f1692ab1dd72c07aee83b_cryptolocker.exe	asih.exe
PID 3080 wrote to memory of 3076	3080	2024-05-23_79812cd4473f1692ab1dd72c07aee83b_cryptolocker.exe	asih.exe
PID 3080 wrote to memory of 3076	3080	2024-05-23_79812cd4473f1692ab1dd72c07aee83b_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-23_79812cd4473f1692ab1dd72c07aee83b_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-23_79812cd4473f1692ab1dd72c07aee83b_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3080

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:3076

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\asih.exe
Filesize
78KB

MD5
463174abb52b8d86fd0bee4e4a87d884

SHA1
822c850e974aaab073fac15db9a32bfb953f9347

SHA256
70cd1a4663fd38302ca540eced32cc9bbb6feb57087f4f2422acd0b2ba99cf54

SHA512
6e3f5894601a8a4eef8e8c77046ce1263a92911ee09c1cee0b9a90967dab68dda5ba02997b9858c1120abcc91e5632a6b878240df537508f3e63d446f646eca8

Download Submit
memory/3076-19-0x00000000020F0000-0x00000000020F6000-memory.dmp

Filesize
24KB

Download
memory/3076-25-0x0000000000730000-0x0000000000736000-memory.dmp

Filesize
24KB

Download
memory/3076-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3080-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3080-1-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/3080-2-0x0000000000670000-0x0000000000676000-memory.dmp

Filesize
24KB

Download
memory/3080-9-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/3080-16-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download