b8299110250e33a025fd8d90ccfa88e643a8fc6bd5a2dc919a3a7aff32b0efe1

Analysis

max time kernel
143s
max time network
155s
platform
windows10-2004_x64
resource
win10v2004-20240412-en
resource tags

arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
submitted
17/04/2024, 00:36

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General

Target

2024-04-17_569106924948d06951183a2f14f55af4_cryptolocker.exe
Size

37KB
MD5

569106924948d06951183a2f14f55af4
SHA1

f5564ba4611fae3f2cdf43df0e25b2cb29660097
SHA256

b8299110250e33a025fd8d90ccfa88e643a8fc6bd5a2dc919a3a7aff32b0efe1
SHA512

f7e96b283dd73312ca9d098a71734469ab2862459a868fa4c9162df842d423daa9906d6be7ce22e35dce74f7c7fff1590e11d8445608cfe73d4c358a0add02b3
SSDEEP

768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITYm:qDdFJy3QMOtEvwDpjjWMl7Tv

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/2252-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0007000000023526-13.dat	CryptoLocker_rule2
behavioral2/memory/2252-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2976-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/2252-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0007000000023526-13.dat	CryptoLocker_set1
behavioral2/memory/2252-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2976-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/2252-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x0007000000023526-13.dat	UPX
behavioral2/memory/2252-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/2976-26-0x0000000000500000-0x0000000000510000-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-1-5-21-1230272463-3683322193-511842230-1000\Control Panel\International\Geo\Nation	2024-04-17_569106924948d06951183a2f14f55af4_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2976	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2252-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x0007000000023526-13.dat	upx
behavioral2/memory/2252-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/2976-26-0x0000000000500000-0x0000000000510000-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 2252 wrote to memory of 2976	2252	2024-04-17_569106924948d06951183a2f14f55af4_cryptolocker.exe	95
PID 2252 wrote to memory of 2976	2252	2024-04-17_569106924948d06951183a2f14f55af4_cryptolocker.exe	95
PID 2252 wrote to memory of 2976	2252	2024-04-17_569106924948d06951183a2f14f55af4_cryptolocker.exe	95

C:\Users\Admin\AppData\Local\Temp\2024-04-17_569106924948d06951183a2f14f55af4_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-17_569106924948d06951183a2f14f55af4_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2252
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2976

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 --field-trial-handle=3916,i,15908197445916505728,3652410145502233610,262144 --variations-seed-version --mojo-platform-channel-handle=3788 /prefetch:8
1⤵
PID:2696

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
37KB

MD5
190109bb40a8c02cf04597d3304b1a1e

SHA1
954db27ab37a4c2c04b12ae4ef48a1f3f79cef98

SHA256
8467b5b859b7c122b4c5f6df15d16bf350799b5522c18c1e2e132b94cc42e0b1

SHA512
d63414a4210cbd1d0921db0d0d0e6be660ae611f56bae936444f8f5719a671ff5d5b90d6495eebc3d88bc70e4f417a07bb38496cf188eb358cf368c097907430

Download Submit
memory/2252-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2252-1-0x0000000002050000-0x0000000002056000-memory.dmp

Filesize
24KB

Download
memory/2252-2-0x0000000002050000-0x0000000002056000-memory.dmp

Filesize
24KB

Download
memory/2252-3-0x0000000002070000-0x0000000002076000-memory.dmp

Filesize
24KB

Download
memory/2252-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2976-19-0x0000000002110000-0x0000000002116000-memory.dmp

Filesize
24KB

Download
memory/2976-21-0x0000000000530000-0x0000000000536000-memory.dmp

Filesize
24KB

Download
memory/2976-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download