19e843ee0365740e846419f4f7e902fd21e52d6c37a128e88677dae51e70ad3e

Analysis

max time kernel
150s
max time network
155s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
28/02/2024, 05:15

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General

Target

2024-02-28_9973c0a8bdf175c5848d85ad4a06bd47_cryptolocker.exe
Size

63KB
MD5

9973c0a8bdf175c5848d85ad4a06bd47
SHA1

61abe9d581c2a3f63da935e9cca75e2dbe2224e1
SHA256

19e843ee0365740e846419f4f7e902fd21e52d6c37a128e88677dae51e70ad3e
SHA512

df78d64e0e58fb6255801a69816bb511521cb6653531365e97ba77b089b863a8ff89f95e8dd7ddc07730799020a963ee490f76da26b8eaef839928470f92949a
SSDEEP

768:T6LsoEEeegiZPvEhHSG+gkum/kLyMro2GtOOtEvwDpjhXMLamkc8J5hRXlp:T6QFElP6n+gxmddpMOtEvwDpjwa3nlp

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/2104-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0007000000023204-13.dat	CryptoLocker_rule2
behavioral2/memory/2104-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4780-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/2104-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0007000000023204-13.dat	CryptoLocker_set1
behavioral2/memory/2104-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4780-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/2104-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x0007000000023204-13.dat	UPX
behavioral2/memory/2104-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4780-26-0x0000000000500000-0x0000000000510000-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-1-5-21-2727153400-192325109-1870347593-1000\Control Panel\International\Geo\Nation	2024-02-28_9973c0a8bdf175c5848d85ad4a06bd47_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4780	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2104-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x0007000000023204-13.dat	upx
behavioral2/memory/2104-18-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/4780-26-0x0000000000500000-0x0000000000510000-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 2104 wrote to memory of 4780	2104	2024-02-28_9973c0a8bdf175c5848d85ad4a06bd47_cryptolocker.exe	89
PID 2104 wrote to memory of 4780	2104	2024-02-28_9973c0a8bdf175c5848d85ad4a06bd47_cryptolocker.exe	89
PID 2104 wrote to memory of 4780	2104	2024-02-28_9973c0a8bdf175c5848d85ad4a06bd47_cryptolocker.exe	89

C:\Users\Admin\AppData\Local\Temp\2024-02-28_9973c0a8bdf175c5848d85ad4a06bd47_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-28_9973c0a8bdf175c5848d85ad4a06bd47_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2104
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4780

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
63KB

MD5
8b0c4b699712004b43bc686b448a8b72

SHA1
251b44132f5c38042722380867a87bdb54d54812

SHA256
1ca693a184a3fa303858eef16889599ddff3edc6459577b9d0cbd3160a60e285

SHA512
db3ab4207ebfbb6f60cdc9c5a4186ea53e50964152c469e8e85fa092378ea4fb2de80924ba80b65c7f347de8521caa5fd4a2538c7bfa9303d6ab7b9593868d5e

Download Submit
memory/2104-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2104-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/2104-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/2104-3-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/2104-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4780-19-0x0000000002110000-0x0000000002116000-memory.dmp

Filesize
24KB

Download
memory/4780-22-0x0000000001FE0000-0x0000000001FE6000-memory.dmp

Filesize
24KB

Download
memory/4780-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download