88b797df1e8f54474ae2b90552ed0cdf06331f8e1586713ed738677466f7d4b4

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
22-05-2024 02:24

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General

Target

2024-05-22_1d7631a729511730d42c5d31b6d05076_cryptolocker.exe
Size

47KB
MD5

1d7631a729511730d42c5d31b6d05076
SHA1

2d4426fc3d0a2a6db482062af30259463910397c
SHA256

88b797df1e8f54474ae2b90552ed0cdf06331f8e1586713ed738677466f7d4b4
SHA512

8296a592bc4d467f9b920614210ec7fe9f0f3c69bd2e0ba74c07e9d8e0053fefcdf82aa14c5739669f375ff39053b8859dee0282601eddd50bac3cde033bf97c
SSDEEP

768:P6LsoVEeegiZPvEhHSP+gp/QtOOtEvwDpjBBMLZdzuqpXsiE8Wq/DpkcI:P6Q0ElP6G+gJQMOtEvwDpjB8WMlfI

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/1692-0-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral2/memory/220-17-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1692-18-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/220-27-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/1692-0-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_set1
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral2/memory/220-17-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1692-18-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_set1
behavioral2/memory/220-27-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_set1

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:

2024-05-22_1d7631a729511730d42c5d31b6d05076_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation	2024-05-22_1d7631a729511730d42c5d31b6d05076_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

220 asih.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
220	asih.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2024-05-22_1d7631a729511730d42c5d31b6d05076_cryptolocker.exe

description	pid	process	target process
PID 1692 wrote to memory of 220	1692	2024-05-22_1d7631a729511730d42c5d31b6d05076_cryptolocker.exe	asih.exe
PID 1692 wrote to memory of 220	1692	2024-05-22_1d7631a729511730d42c5d31b6d05076_cryptolocker.exe	asih.exe
PID 1692 wrote to memory of 220	1692	2024-05-22_1d7631a729511730d42c5d31b6d05076_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-22_1d7631a729511730d42c5d31b6d05076_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-22_1d7631a729511730d42c5d31b6d05076_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1692

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:220

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
47KB

MD5
1df1b9acc08a1b0c287970cf86016bf0

SHA1
94f646ea7b1ccacf1c8231792097cba5aed26267

SHA256
b44b39f2dd5aa2f15cb59b39d4e7a911b9e891d85777c465bd1d2593b2109e20

SHA512
789d5e7f91062f7a6316a821e802744054e5b28de1110fb187ee1e85d6f301a14c38a1ff43c7c61699cff3a72fb372888e24c5bf0dd952ecc0af65bf2a44589e

Download Submit
memory/220-17-0x0000000000500000-0x000000000050B000-memory.dmp

Filesize
44KB

Download
memory/220-20-0x00000000006E0000-0x00000000006E6000-memory.dmp

Filesize
24KB

Download
memory/220-26-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/220-27-0x0000000000500000-0x000000000050B000-memory.dmp

Filesize
44KB

Download
memory/1692-0-0x0000000000500000-0x000000000050B000-memory.dmp

Filesize
44KB

Download
memory/1692-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/1692-2-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/1692-9-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/1692-18-0x0000000000500000-0x000000000050B000-memory.dmp

Filesize
44KB

Download