baaab7ead6169326bcf9da597f9fcfc483d20af76d7935c9d631625ead6e8483

Analysis

max time kernel
148s
max time network
154s
platform
windows10-2004_x64
resource
win10v2004-20240419-en
resource tags

arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
submitted
07/05/2024, 23:22

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General

Target

2024-05-07_696b173cb3fe7135f201051483f8c48d_cryptolocker.exe
Size

38KB
MD5

696b173cb3fe7135f201051483f8c48d
SHA1

3823e322cddef3905c936d5cf6cf4e6e1e072cd2
SHA256

baaab7ead6169326bcf9da597f9fcfc483d20af76d7935c9d631625ead6e8483
SHA512

5b561cb1aa39c0ed93af2cfbaeadaba9385ff9ad1beffa877ea4f1815f4457f9cefaa67457ae2159a05a2356d03d8a9f764b2c8775edf3be69c28b825be042a7
SSDEEP

768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITYaBP:qDdFJy3QMOtEvwDpjjWMl7Td5

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/2664-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000c000000023b56-13.dat	CryptoLocker_rule2
behavioral2/memory/2664-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3116-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/2664-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000c000000023b56-13.dat	CryptoLocker_set1
behavioral2/memory/2664-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3116-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/2664-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000c000000023b56-13.dat	UPX
behavioral2/memory/2664-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/3116-26-0x0000000000500000-0x0000000000510000-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-1-5-21-17203666-93769886-2545153620-1000\Control Panel\International\Geo\Nation	2024-05-07_696b173cb3fe7135f201051483f8c48d_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3116	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2664-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x000c000000023b56-13.dat	upx
behavioral2/memory/2664-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/3116-26-0x0000000000500000-0x0000000000510000-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 2664 wrote to memory of 3116	2664	2024-05-07_696b173cb3fe7135f201051483f8c48d_cryptolocker.exe	85
PID 2664 wrote to memory of 3116	2664	2024-05-07_696b173cb3fe7135f201051483f8c48d_cryptolocker.exe	85
PID 2664 wrote to memory of 3116	2664	2024-05-07_696b173cb3fe7135f201051483f8c48d_cryptolocker.exe	85

C:\Users\Admin\AppData\Local\Temp\2024-05-07_696b173cb3fe7135f201051483f8c48d_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-07_696b173cb3fe7135f201051483f8c48d_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2664
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3116

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
38KB

MD5
dfb0af8f78b8ca08a8deccf0cdff3957

SHA1
3b8d956a8f325e19604b870ba65eea915ec1f3c0

SHA256
48d8fa4223120cdf338deb7b9f8037d8539a985258f50b741dea6904540b3343

SHA512
4fccda8b89e4ed8836e8a191e34107b423e6743cc91e12b5c7053c7ccf79f94aca16726dd4e65b00382b0281c128c40020933ab709a3f56549250e6edd6985f9

Download Submit
memory/2664-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2664-1-0x0000000000730000-0x0000000000736000-memory.dmp

Filesize
24KB

Download
memory/2664-3-0x0000000000750000-0x0000000000756000-memory.dmp

Filesize
24KB

Download
memory/2664-5-0x0000000000730000-0x0000000000736000-memory.dmp

Filesize
24KB

Download
memory/2664-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3116-19-0x00000000005C0000-0x00000000005C6000-memory.dmp

Filesize
24KB

Download
memory/3116-25-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/3116-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download