3116b22af5baceb668e44ff3c21bbf0b4cec15e4976c647b14799269552be9af

Analysis

max time kernel
150s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
15/05/2024, 18:27

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General

Target

2024-05-15_167f481a15c2e7a3f0ff2177a7f62ecd_cryptolocker.exe
Size

33KB
MD5

167f481a15c2e7a3f0ff2177a7f62ecd
SHA1

78785b0c9452a3e5d019722f3acfbdffe2f379c7
SHA256

3116b22af5baceb668e44ff3c21bbf0b4cec15e4976c647b14799269552be9af
SHA512

6d390d0e601e9bdb40c8311a3c3614c385bb04a5ae83ca56a718ee49070adb3dc8d7b67ed16626d1b64af47d7a302d02952783e8b0ef840b23d7da0768d46a29
SSDEEP

768:bFPm5zusFUB2preAr+Ofjg0S16avdrQFiLjJvtXkP:bFPmpiif/oc+vXkP

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/3156-0-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000700000002328e-13.dat	CryptoLocker_rule2
behavioral2/memory/3748-16-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3156-18-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3748-27-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/3156-0-0x0000000008000000-0x000000000800E000-memory.dmp	UPX
behavioral2/files/0x000700000002328e-13.dat	UPX
behavioral2/memory/3748-16-0x0000000008000000-0x000000000800E000-memory.dmp	UPX
behavioral2/memory/3156-18-0x0000000008000000-0x000000000800E000-memory.dmp	UPX
behavioral2/memory/3748-27-0x0000000008000000-0x000000000800E000-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-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation	2024-05-15_167f481a15c2e7a3f0ff2177a7f62ecd_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3748	lossy.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3156-0-0x0000000008000000-0x000000000800E000-memory.dmp	upx
behavioral2/files/0x000700000002328e-13.dat	upx
behavioral2/memory/3748-16-0x0000000008000000-0x000000000800E000-memory.dmp	upx
behavioral2/memory/3156-18-0x0000000008000000-0x000000000800E000-memory.dmp	upx
behavioral2/memory/3748-27-0x0000000008000000-0x000000000800E000-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 3156 wrote to memory of 3748	3156	2024-05-15_167f481a15c2e7a3f0ff2177a7f62ecd_cryptolocker.exe	82
PID 3156 wrote to memory of 3748	3156	2024-05-15_167f481a15c2e7a3f0ff2177a7f62ecd_cryptolocker.exe	82
PID 3156 wrote to memory of 3748	3156	2024-05-15_167f481a15c2e7a3f0ff2177a7f62ecd_cryptolocker.exe	82

C:\Users\Admin\AppData\Local\Temp\2024-05-15_167f481a15c2e7a3f0ff2177a7f62ecd_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-15_167f481a15c2e7a3f0ff2177a7f62ecd_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3156
- C:\Users\Admin\AppData\Local\Temp\lossy.exe
  "C:\Users\Admin\AppData\Local\Temp\lossy.exe"
  2⤵
  - Executes dropped EXE
  PID:3748

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

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Downloads

C:\Users\Admin\AppData\Local\Temp\lossy.exe

Filesize
33KB

MD5
25976c8c41bf16ec7b707a19c8e39fe2

SHA1
e3bec8ec496c46f4c7ddd04a1b118d0a4fbdb3e5

SHA256
cf056757708154eff3cea06bbbde9acb312a69454326630238160d3255311c05

SHA512
99268d87dc5e9d5439d1d618ce019009125c3fa7bb32cb4b1eb0bdcd887261c5473ddfb6dd440c05f359140edbc119785f0c5a935b315a508efcb1ea480e0aea

Download Submit
memory/3156-0-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download
memory/3156-1-0x00000000005B0000-0x00000000005B6000-memory.dmp

Filesize
24KB

Download
memory/3156-2-0x00000000005D0000-0x00000000005D6000-memory.dmp

Filesize
24KB

Download
memory/3156-9-0x00000000005B0000-0x00000000005B6000-memory.dmp

Filesize
24KB

Download
memory/3156-18-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download
memory/3748-16-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download
memory/3748-20-0x0000000001F60000-0x0000000001F66000-memory.dmp

Filesize
24KB

Download
memory/3748-26-0x0000000000560000-0x0000000000566000-memory.dmp

Filesize
24KB

Download
memory/3748-27-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download