f8312c479e8e7983d293848318cfec432cc2983ef8cc777f20ab9158193f2b0f

Analysis

max time kernel
204s
max time network
222s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
18/01/2024, 22:44

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General

Target

2024-01-18_4db7c367ea37f008804eb942f19896a9_cryptolocker.exe
Size

84KB
MD5

4db7c367ea37f008804eb942f19896a9
SHA1

a1a046b12decf91d05de5d8a39501676dbe2f662
SHA256

f8312c479e8e7983d293848318cfec432cc2983ef8cc777f20ab9158193f2b0f
SHA512

2aa9a9b52fcdb22dcac496215402f5bd602b5d330b8e04d18998f2b6701d53b10f11f58911b3b5421b012513eed44175841cc736b002ad459bce64f1bfbbbb0b
SSDEEP

768:qkmnjFom/kLyMro2GtOOtEvwDpjeY10Y/YMsvlMdwPK80GQuchoIgtI1:qkmnpomddpMOtEvwDpjJGYQbN/PKwMgu

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/1516-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1516-2-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x00070000000231ff-15.dat	CryptoLocker_rule2
behavioral2/memory/5096-19-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/5096-29-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral2/memory/1516-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1516-2-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x00070000000231ff-15.dat	CryptoLocker_set1
behavioral2/memory/5096-19-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/5096-29-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/1516-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/1516-2-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/files/0x00070000000231ff-15.dat	UPX
behavioral2/memory/5096-19-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/5096-29-0x0000000000500000-0x000000000050F000-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-1-5-21-635608581-3370340891-292606865-1000\Control Panel\International\Geo\Nation	2024-01-18_4db7c367ea37f008804eb942f19896a9_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
5096	asih.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1516-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/1516-2-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/files/0x00070000000231ff-15.dat	upx
behavioral2/memory/5096-19-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/5096-29-0x0000000000500000-0x000000000050F000-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 1516 wrote to memory of 5096	1516	2024-01-18_4db7c367ea37f008804eb942f19896a9_cryptolocker.exe	88
PID 1516 wrote to memory of 5096	1516	2024-01-18_4db7c367ea37f008804eb942f19896a9_cryptolocker.exe	88
PID 1516 wrote to memory of 5096	1516	2024-01-18_4db7c367ea37f008804eb942f19896a9_cryptolocker.exe	88

C:\Users\Admin\AppData\Local\Temp\2024-01-18_4db7c367ea37f008804eb942f19896a9_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-01-18_4db7c367ea37f008804eb942f19896a9_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1516
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:5096

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
84KB

MD5
1e63aa7796eaac4e1d5f7f90d6a9d006

SHA1
39ec44c3446da1b76c54490b34b8383299573813

SHA256
f631910f6f058ed2be01b0ab61f246bbb5be8a57944919ba5ba4917f1c7c0ff9

SHA512
783575b810182d80867947c4045076c3680d548af47d4885b926d642921531c64c7ee15a7f20ac9993ebba54793b834cbf47937c4c5c0b4a77512b1e045f5a05

Download Submit
memory/1516-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/1516-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/1516-2-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/1516-3-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/1516-4-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/5096-19-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/5096-22-0x00000000006D0000-0x00000000006D6000-memory.dmp

Filesize
24KB

Download
memory/5096-24-0x00000000006B0000-0x00000000006B6000-memory.dmp

Filesize
24KB

Download
memory/5096-29-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download