845d3b40cfb438a57ca655ee8b55377a83a11a8d48cb3a1b6a784820693ac015

Analysis

max time kernel
143s
max time network
172s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
19/03/2024, 16:59

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General

Target

2024-03-19_e7b0a025bbf182c6d55ac2ef060f412a_cryptolocker.exe
Size

118KB
MD5

e7b0a025bbf182c6d55ac2ef060f412a
SHA1

7de405a2afb4c1b6da3ba3a8a3d913ab875e14c8
SHA256

845d3b40cfb438a57ca655ee8b55377a83a11a8d48cb3a1b6a784820693ac015
SHA512

f2420e74ccf188011a1bade3dd541de13dabac32c283f8c765476f93bf94eccd2b5784db53bc34f41bf86acd22606dea80bc9256bb4f01e7de8c4f41d9b2d272
SSDEEP

1536:z6QFElP6n+gKmddpMOtEvwDpj3GYQbN/PKwNgp01ZNn:z6a+CdOOtEvwDpjczh

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/2616-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000a000000016fa5-13.dat	CryptoLocker_rule2
behavioral2/memory/1376-24-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2616-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/2616-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000a000000016fa5-13.dat	CryptoLocker_set1
behavioral2/memory/1376-24-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2616-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/2616-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000a000000016fa5-13.dat	UPX
behavioral2/memory/1376-24-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/2616-26-0x0000000000500000-0x0000000000510000-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-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	2024-03-19_e7b0a025bbf182c6d55ac2ef060f412a_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1376	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2616-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x000a000000016fa5-13.dat	upx
behavioral2/memory/1376-24-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/2616-26-0x0000000000500000-0x0000000000510000-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 2616 wrote to memory of 1376	2616	2024-03-19_e7b0a025bbf182c6d55ac2ef060f412a_cryptolocker.exe	101
PID 2616 wrote to memory of 1376	2616	2024-03-19_e7b0a025bbf182c6d55ac2ef060f412a_cryptolocker.exe	101
PID 2616 wrote to memory of 1376	2616	2024-03-19_e7b0a025bbf182c6d55ac2ef060f412a_cryptolocker.exe	101

C:\Users\Admin\AppData\Local\Temp\2024-03-19_e7b0a025bbf182c6d55ac2ef060f412a_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-19_e7b0a025bbf182c6d55ac2ef060f412a_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2616
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1376

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=4068 --field-trial-handle=2236,i,5367110156796017614,12594004256180761011,262144 --variations-seed-version /prefetch:8
1⤵
PID:4292

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
118KB

MD5
85b1b3c6a1ad59b866b913d128f4019f

SHA1
c474efe63e026a27f2af8d148180d6ce65a938e4

SHA256
b325b484fdae0b2cd8fba02dc8b65f62e407c748c45d072fb9e280ceea33244a

SHA512
8b376b277787c7cd909f8716263eacf90364cb9d4d1f58e12decc3dd3342e73da355dc49dfb34e132865350f4a6084964f0cb018a5e8bbbd9e2f15c3228c92f4

Download Submit
memory/1376-18-0x00000000006D0000-0x00000000006D6000-memory.dmp

Filesize
24KB

Download
memory/1376-24-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1376-25-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/2616-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2616-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/2616-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/2616-3-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/2616-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download