ec7a03d451a9e9a230dd1e8e1d226ad294e91a018b54ecd9328d281400e2cae7

Analysis

max time kernel
149s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
05/04/2024, 18:40

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General

Target

2024-04-05_7fdf962b531dfa6fa2949e5f72e848d4_cryptolocker.exe
Size

87KB
MD5

7fdf962b531dfa6fa2949e5f72e848d4
SHA1

b706284ca294df1df8121e023ea04d141ba9b837
SHA256

ec7a03d451a9e9a230dd1e8e1d226ad294e91a018b54ecd9328d281400e2cae7
SHA512

e91b15bb9971b729cefa03c440d1da7078caaa561dbe657bdaad13a9a9a5ba6876a864320aea2e7d830270cf8ddf8ff41261c3c33d644fea9f0d9ecfa62a32d6
SSDEEP

1536:qkmnpomddpMOtEvwDpjJGYQbN/PKwMg9Y:AnBdOOtEvwDpj6zS

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/1936-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000800000002320b-13.dat	CryptoLocker_rule2
behavioral2/memory/1936-16-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1644-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/1936-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000800000002320b-13.dat	CryptoLocker_set1
behavioral2/memory/1936-16-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1644-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/1936-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/files/0x000800000002320b-13.dat	UPX
behavioral2/memory/1936-16-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/1644-26-0x0000000000500000-0x000000000050F000-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-1-5-21-983155329-280873152-1838004294-1000\Control Panel\International\Geo\Nation	2024-04-05_7fdf962b531dfa6fa2949e5f72e848d4_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1644	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1936-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/files/0x000800000002320b-13.dat	upx
behavioral2/memory/1936-16-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/1644-26-0x0000000000500000-0x000000000050F000-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 1936 wrote to memory of 1644	1936	2024-04-05_7fdf962b531dfa6fa2949e5f72e848d4_cryptolocker.exe	86
PID 1936 wrote to memory of 1644	1936	2024-04-05_7fdf962b531dfa6fa2949e5f72e848d4_cryptolocker.exe	86
PID 1936 wrote to memory of 1644	1936	2024-04-05_7fdf962b531dfa6fa2949e5f72e848d4_cryptolocker.exe	86

C:\Users\Admin\AppData\Local\Temp\2024-04-05_7fdf962b531dfa6fa2949e5f72e848d4_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-05_7fdf962b531dfa6fa2949e5f72e848d4_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1936
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1644

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
88KB

MD5
d67ffcf4b8edcd6a06b71a0eab7888fd

SHA1
4966b415ae5cb590d4d026580a335ae5b025c8ac

SHA256
5cec978ef507541b6ccb13854b3b51fa3b2791e3d3df95d7090b6c755a96d266

SHA512
1651a2ef9a8c5ee59028c4e44a115f321f11ceb326c812c69b313826822984aa217548ae639163df1ab8d1d7108e2af5b7dd86269a33076f484f2b54106f0104

Download Submit
memory/1644-20-0x0000000002110000-0x0000000002116000-memory.dmp

Filesize
24KB

Download
memory/1644-19-0x00000000020E0000-0x00000000020E6000-memory.dmp

Filesize
24KB

Download
memory/1644-26-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/1936-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/1936-1-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/1936-2-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/1936-3-0x00000000005D0000-0x00000000005D6000-memory.dmp

Filesize
24KB

Download
memory/1936-16-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download