ac3682d111c7c22a4a3fc2a2ecd97ff7477c58db51bf54c2b15b54ccae04c136

Analysis

max time kernel
149s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240419-en
resource tags

arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
submitted
07-05-2024 11:38

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General

Target

2024-05-07_efe4545762fa5847dc569907ca7b30ac_cryptolocker.exe
Size

65KB
MD5

efe4545762fa5847dc569907ca7b30ac
SHA1

aea0011759793bd3837098c3b47d41815dabbc5b
SHA256

ac3682d111c7c22a4a3fc2a2ecd97ff7477c58db51bf54c2b15b54ccae04c136
SHA512

b075b6b501bb51ea0bc13b730682200eec205fac6b9774e68b8b77a9493b86bc5034574cfaa28c44609c1e52afe34e13b4227da7fcc8e342558a7da8d824f07c
SSDEEP

1536:P8mnK6QFElP6n+gymddpMOtEvwDpjY6UAXu:1nK6a+qdOOtEvwDpju

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/2208-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000c000000023b4b-13.dat	CryptoLocker_rule2
behavioral2/memory/2208-16-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2196-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/2208-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000c000000023b4b-13.dat	CryptoLocker_set1
behavioral2/memory/2208-16-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/memory/2196-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/2208-0-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/files/0x000c000000023b4b-13.dat	UPX
behavioral2/memory/2208-16-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/memory/2196-26-0x0000000000500000-0x000000000050F311-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-1-5-21-2818691465-3043947619-2475182763-1000\Control Panel\International\Geo\Nation	2024-05-07_efe4545762fa5847dc569907ca7b30ac_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2196	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2208-0-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/files/0x000c000000023b4b-13.dat	upx
behavioral2/memory/2208-16-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/memory/2196-26-0x0000000000500000-0x000000000050F311-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 2208 wrote to memory of 2196	2208	2024-05-07_efe4545762fa5847dc569907ca7b30ac_cryptolocker.exe	86
PID 2208 wrote to memory of 2196	2208	2024-05-07_efe4545762fa5847dc569907ca7b30ac_cryptolocker.exe	86
PID 2208 wrote to memory of 2196	2208	2024-05-07_efe4545762fa5847dc569907ca7b30ac_cryptolocker.exe	86

C:\Users\Admin\AppData\Local\Temp\2024-05-07_efe4545762fa5847dc569907ca7b30ac_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-07_efe4545762fa5847dc569907ca7b30ac_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2208
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2196

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
65KB

MD5
5eb6384916141cd6961ca5b3cc881f8e

SHA1
2d243e62a4081cdc9b8691c7643786dcb82bc897

SHA256
517a43bab94dd7770f5fcb0d15a23532ad8e094c83017e39f86225b3d33c9ae8

SHA512
94730fa82dca32e32e6521be26bd06738cf7f9dbbbeaeb8ab5d3bec3fdaab93d53daceee014b27922e568a108888dbdeab46504c39f68472bed24d319cb38c9b

Download Submit
memory/2196-19-0x0000000001F70000-0x0000000001F76000-memory.dmp

Filesize
24KB

Download
memory/2196-25-0x0000000000530000-0x0000000000536000-memory.dmp

Filesize
24KB

Download
memory/2196-26-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/2208-0-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/2208-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/2208-2-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/2208-3-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download
memory/2208-16-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download