82d2dcbcdf7d05c3d98d0fdb70d34a50626f93ab42fbea083e8adc88afe4d4fb

Analysis

max time kernel
145s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
11/04/2024, 02:29

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General

Target

2024-04-11_33c814bf2293bf1b84be409353ae0783_cryptolocker.exe
Size

66KB
MD5

33c814bf2293bf1b84be409353ae0783
SHA1

1e64ea4c7a92fd4be6f255fb84cdd5d2d32c5ebf
SHA256

82d2dcbcdf7d05c3d98d0fdb70d34a50626f93ab42fbea083e8adc88afe4d4fb
SHA512

46c6ba3c51191ec1867b9132e185a7b3a33438dad1dcb6daa4edc929e93ff053ef2a469e7978551e2a3873e0c8ef01aeb0c65f43d5efd0e88433807f01239378
SSDEEP

1536:P8mnK6QFElP6n+gymddpMOtEvwDpjYibAoQRhV:1nK6a+qdOOtEvwDpjC

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/4580-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000b000000023227-13.dat	CryptoLocker_rule2
behavioral2/memory/4580-25-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2724-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/4580-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000b000000023227-13.dat	CryptoLocker_set1
behavioral2/memory/4580-25-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/memory/2724-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/4580-0-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/files/0x000b000000023227-13.dat	UPX
behavioral2/memory/4580-25-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/memory/2724-26-0x0000000000500000-0x000000000050F311-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-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	2024-04-11_33c814bf2293bf1b84be409353ae0783_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2724	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4580-0-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/files/0x000b000000023227-13.dat	upx
behavioral2/memory/4580-25-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/memory/2724-26-0x0000000000500000-0x000000000050F311-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 4580 wrote to memory of 2724	4580	2024-04-11_33c814bf2293bf1b84be409353ae0783_cryptolocker.exe	91
PID 4580 wrote to memory of 2724	4580	2024-04-11_33c814bf2293bf1b84be409353ae0783_cryptolocker.exe	91
PID 4580 wrote to memory of 2724	4580	2024-04-11_33c814bf2293bf1b84be409353ae0783_cryptolocker.exe	91

C:\Users\Admin\AppData\Local\Temp\2024-04-11_33c814bf2293bf1b84be409353ae0783_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-11_33c814bf2293bf1b84be409353ae0783_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4580
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2724

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=1400 --field-trial-handle=2256,i,6670388345726423024,18382795228658886258,262144 --variations-seed-version /prefetch:8
1⤵
PID:936

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
66KB

MD5
6467079deb11185900f6bf33f41865aa

SHA1
67b820b2ad298ce598104a08ef44c09aa143185e

SHA256
00e5e15c4b58abd2057340898c712162e2cc01d2ac6d7dfa89b4f032203d0ba9

SHA512
dd00085e7fa89890dd2489f890ea739b1df6ee190defb84a0e267f4941d134dc534cf4b8624d6c341c6ad85e18b5787e9b536bf0fa4109d0530c69eb75ca2f91

Download Submit
memory/2724-18-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/2724-19-0x00000000005D0000-0x00000000005D6000-memory.dmp

Filesize
24KB

Download
memory/2724-26-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/4580-0-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/4580-1-0x0000000002150000-0x0000000002156000-memory.dmp

Filesize
24KB

Download
memory/4580-2-0x0000000002150000-0x0000000002156000-memory.dmp

Filesize
24KB

Download
memory/4580-3-0x0000000002050000-0x0000000002056000-memory.dmp

Filesize
24KB

Download
memory/4580-25-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download