5d5fef3d09069c2e2af3dd78f767778389c9cd89c5ae9cb21695bb6621d7c0b9

Analysis

max time kernel
135s
max time network
157s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
28/04/2024, 01:30

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General

Target

2024-04-28_5ffc571f6b69af9f3f8a46d5dfe5b704_cryptolocker.exe
Size

80KB
MD5

5ffc571f6b69af9f3f8a46d5dfe5b704
SHA1

dc641258ca04ca1ab69dd62e31bd24f4650b1832
SHA256

5d5fef3d09069c2e2af3dd78f767778389c9cd89c5ae9cb21695bb6621d7c0b9
SHA512

e6c057a1b292dfe5289ff85427ba08315d1f7ca1531d412a4ec310fa06dcf4dad8168d8c163d655539afe3e98c4a9194b81172e73613b2711c8c598536309db7
SSDEEP

1536:T6QFElP6n+gxmddpMOtEvwDpjwaxTNUOAkXtBde:T6a+rdOOtEvwDpjNtE

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/3968-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0008000000023244-13.dat	CryptoLocker_rule2
behavioral2/memory/3968-24-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3912-25-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/3968-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0008000000023244-13.dat	CryptoLocker_set1
behavioral2/memory/3968-24-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3912-25-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/3968-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x0008000000023244-13.dat	UPX
behavioral2/memory/3968-24-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/3912-25-0x0000000000500000-0x0000000000510000-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	2024-04-28_5ffc571f6b69af9f3f8a46d5dfe5b704_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3912	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3968-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x0008000000023244-13.dat	upx
behavioral2/memory/3968-24-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/3912-25-0x0000000000500000-0x0000000000510000-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 3968 wrote to memory of 3912	3968	2024-04-28_5ffc571f6b69af9f3f8a46d5dfe5b704_cryptolocker.exe	90
PID 3968 wrote to memory of 3912	3968	2024-04-28_5ffc571f6b69af9f3f8a46d5dfe5b704_cryptolocker.exe	90
PID 3968 wrote to memory of 3912	3968	2024-04-28_5ffc571f6b69af9f3f8a46d5dfe5b704_cryptolocker.exe	90

C:\Users\Admin\AppData\Local\Temp\2024-04-28_5ffc571f6b69af9f3f8a46d5dfe5b704_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-28_5ffc571f6b69af9f3f8a46d5dfe5b704_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3968
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3912

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=2660 --field-trial-handle=2244,i,11878111470816612087,2265290141962607370,262144 --variations-seed-version /prefetch:8
1⤵
PID:1016

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
80KB

MD5
c9ea23e1a3680ad1dd6662ff7d87fa2a

SHA1
6ca046e12a5c45d6d10046a8b756abd2744b2803

SHA256
44363a7d62d922030cb43fb3e8a45a1ad03fc5300fce9b6e6fcb3ab7e185fb0b

SHA512
1bd326d14ddd20b89a37229f08163510a3f28490ad31daa6548fa65214fb7873b8b3cf74f4b3e3ba3fe133f773b11c52ef24ce2325caa49d3d5cebe69a283dd0

Download Submit
memory/3912-25-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3968-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3968-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/3968-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/3968-3-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/3968-24-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download