9b6da4d6845609f02788a582b81631c8201c35281c9fe109c2e6e5cbdff684c3

Analysis

max time kernel
149s
max time network
156s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
21-05-2024 16:06

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General

Target

2024-05-21_fb157818fdff78f6de6e29a4671b36db_cryptolocker.exe
Size

39KB
MD5

fb157818fdff78f6de6e29a4671b36db
SHA1

f40de9389272e92066f3f6e4a7f54898ca5b2292
SHA256

9b6da4d6845609f02788a582b81631c8201c35281c9fe109c2e6e5cbdff684c3
SHA512

13e373dda09d3628d5492ace9169104327e6d2e17947834e5163b0ab5d6d5d0ca025c0de4ccd160619ebdcc4e127c380524702e52d56f8fe417a8a1dad7cc72d
SSDEEP

768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITYaB4:qDdFJy3QMOtEvwDpjjWMl7Tdq

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4596-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral2/memory/4596-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2420-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4596-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral2/memory/4596-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2420-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4596-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral2/memory/4596-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/2420-27-0x0000000000500000-0x0000000000510000-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

Processes:

2024-05-21_fb157818fdff78f6de6e29a4671b36db_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	2024-05-21_fb157818fdff78f6de6e29a4671b36db_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

2420 asih.exe

pid	process
2420	asih.exe

UPX packed file 4 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/4596-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral2/memory/4596-18-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/2420-27-0x0000000000500000-0x0000000000510000-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

Processes:

2024-05-21_fb157818fdff78f6de6e29a4671b36db_cryptolocker.exe

description	pid	process	target process
PID 4596 wrote to memory of 2420	4596	2024-05-21_fb157818fdff78f6de6e29a4671b36db_cryptolocker.exe	asih.exe
PID 4596 wrote to memory of 2420	4596	2024-05-21_fb157818fdff78f6de6e29a4671b36db_cryptolocker.exe	asih.exe
PID 4596 wrote to memory of 2420	4596	2024-05-21_fb157818fdff78f6de6e29a4671b36db_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-21_fb157818fdff78f6de6e29a4671b36db_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-21_fb157818fdff78f6de6e29a4671b36db_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4596
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2420

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=1340 --field-trial-handle=2356,i,13261194862334667799,7441241219475888176,262144 --variations-seed-version /prefetch:8
1⤵
PID:3184

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
40KB

MD5
b4c81074dcadcdfa5953a90d3fa65976

SHA1
9e06e64e0ec70e1a4c3a4058177c70e2a8900a1c

SHA256
6fb701e265e07fef6933cc37dc6126f8c73c6d9d942692ad629a54a0aae6c16d

SHA512
221d48a38c9f35e745cb0ea2098c4d8616ca46dc68cfe9288f7e3f5181d1ddc1aa64a7bf7df214d0e030ea528bb844db9609bf63d8bee7972f2ff148db970520

Download Submit
memory/2420-26-0x00000000020E0000-0x00000000020E6000-memory.dmp

Filesize
24KB

Download
memory/2420-20-0x0000000002100000-0x0000000002106000-memory.dmp

Filesize
24KB

Download
memory/2420-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4596-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4596-1-0x0000000000560000-0x0000000000566000-memory.dmp

Filesize
24KB

Download
memory/4596-2-0x0000000000560000-0x0000000000566000-memory.dmp

Filesize
24KB

Download
memory/4596-3-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download
memory/4596-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download