e5e1dbd76cfbebb3cb8e81a5b4670966b41c7f2ae93fbadeadf200b6df207060

Analysis

max time kernel
139s
max time network
154s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
20/02/2024, 08:23

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General

Target

2024-02-20_12b81832c04099fe48ff342ce255b0b2_cryptolocker.exe
Size

72KB
MD5

12b81832c04099fe48ff342ce255b0b2
SHA1

0ab130dff48087476aec293cbc7b55cca9619c80
SHA256

e5e1dbd76cfbebb3cb8e81a5b4670966b41c7f2ae93fbadeadf200b6df207060
SHA512

5674acd9daabaef43f0185796b2136bf94d33fc2da64ec19f2c2944432e8a57d0bbbb8a655df6103c1ecbcd81427cbc41c2900eff017a58a5144bba10e494276
SSDEEP

1536:P8mnK6QFElP6n+gymddpMOtEvwDpjIHsalec:1nK6a+qdOOtEvwDpjg

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/3716-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0007000000023126-13.dat	CryptoLocker_rule2
behavioral2/memory/3716-18-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3140-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/3716-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0007000000023126-13.dat	CryptoLocker_set1
behavioral2/memory/3716-18-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/memory/3140-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/3716-0-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/files/0x0007000000023126-13.dat	UPX
behavioral2/memory/3716-18-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/memory/3140-26-0x0000000000500000-0x000000000050F311-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-1-5-21-3073191680-435865314-2862784915-1000\Control Panel\International\Geo\Nation	2024-02-20_12b81832c04099fe48ff342ce255b0b2_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3140	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3716-0-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/files/0x0007000000023126-13.dat	upx
behavioral2/memory/3716-18-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/memory/3140-26-0x0000000000500000-0x000000000050F311-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 3716 wrote to memory of 3140	3716	2024-02-20_12b81832c04099fe48ff342ce255b0b2_cryptolocker.exe	84
PID 3716 wrote to memory of 3140	3716	2024-02-20_12b81832c04099fe48ff342ce255b0b2_cryptolocker.exe	84
PID 3716 wrote to memory of 3140	3716	2024-02-20_12b81832c04099fe48ff342ce255b0b2_cryptolocker.exe	84

C:\Users\Admin\AppData\Local\Temp\2024-02-20_12b81832c04099fe48ff342ce255b0b2_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-20_12b81832c04099fe48ff342ce255b0b2_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3716
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3140

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
72KB

MD5
a6feec8c129e8752f901b0301b1817ff

SHA1
b08b45826f9b644ab3c909af059f933e5a1e36f2

SHA256
bb0d106fa2914c4c6cedca3537af11002371d06eedeac05dc6fcc57c3f4d0f0e

SHA512
1ad6201877ac4a3d58be39b7586a42fbb90a943defcdce1fc134f3e31483f3caba4eb05afab34675643b81515d19d9152c33d4bc51b948d13bc087f848c6e0a3

Download Submit
memory/3140-20-0x00000000007B0000-0x00000000007B6000-memory.dmp

Filesize
24KB

Download
memory/3140-19-0x00000000020F0000-0x00000000020F6000-memory.dmp

Filesize
24KB

Download
memory/3140-26-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/3716-0-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/3716-1-0x00000000021D0000-0x00000000021D6000-memory.dmp

Filesize
24KB

Download
memory/3716-2-0x00000000021D0000-0x00000000021D6000-memory.dmp

Filesize
24KB

Download
memory/3716-3-0x00000000020E0000-0x00000000020E6000-memory.dmp

Filesize
24KB

Download
memory/3716-18-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download