df92f4c5cf8e99b4d33f2ac5e65cb5851131e83016df111507440f57936515c9

Analysis

max time kernel
149s
max time network
154s
platform
windows10-2004_x64
resource
win10v2004-20240412-en
resource tags

arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
submitted
15/04/2024, 06:00

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General

Target

2024-04-15_6d0f1c88ead88036a6110c66c0da0a9d_cryptolocker.exe
Size

89KB
MD5

6d0f1c88ead88036a6110c66c0da0a9d
SHA1

28df82a7b4363c63e83977cf0df4f6fbf720d587
SHA256

df92f4c5cf8e99b4d33f2ac5e65cb5851131e83016df111507440f57936515c9
SHA512

f47dc2a67c2b3f287b39d5b6b1ff93bdfd3b9264f5ed36e858c76d303907ba18fe52b7eaf12224aa413e7557fcb3287522eeaa914405431d3899d9f795a49685
SSDEEP

1536:qkmnpomddpMOtEvwDpjJGYQbN/PKwMgddY:AnBdOOtEvwDpj6zs

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/3068-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000700000002353f-13.dat	CryptoLocker_rule2
behavioral2/memory/3068-16-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1172-27-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/3068-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000700000002353f-13.dat	CryptoLocker_set1
behavioral2/memory/3068-16-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1172-27-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/3068-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/files/0x000700000002353f-13.dat	UPX
behavioral2/memory/3068-16-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/1172-27-0x0000000000500000-0x000000000050F000-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	2024-04-15_6d0f1c88ead88036a6110c66c0da0a9d_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1172	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3068-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/files/0x000700000002353f-13.dat	upx
behavioral2/memory/3068-16-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/1172-27-0x0000000000500000-0x000000000050F000-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 3068 wrote to memory of 1172	3068	2024-04-15_6d0f1c88ead88036a6110c66c0da0a9d_cryptolocker.exe	93
PID 3068 wrote to memory of 1172	3068	2024-04-15_6d0f1c88ead88036a6110c66c0da0a9d_cryptolocker.exe	93
PID 3068 wrote to memory of 1172	3068	2024-04-15_6d0f1c88ead88036a6110c66c0da0a9d_cryptolocker.exe	93

C:\Users\Admin\AppData\Local\Temp\2024-04-15_6d0f1c88ead88036a6110c66c0da0a9d_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-15_6d0f1c88ead88036a6110c66c0da0a9d_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3068
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1172

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=5224,i,6862816582779850255,3437582573780299282,262144 --variations-seed-version --mojo-platform-channel-handle=4292 /prefetch:8
1⤵
PID:1204

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
89KB

MD5
863c97d600b725063fcff6424a4028a7

SHA1
79c120ba122116287e903e900b53469b81eb96f9

SHA256
4b25ae0b02487f765b9b522b57840f51b2484544e54383d889b8e685cd306f0e

SHA512
d316472fec70292020f66312dadf6621ad3077e5b99666b518fc3e15d8f2c14aaeb2f794ddf7244cdd07de157a602722a7da6f94b5ff07d41ce215dca87c46c4

Download Submit
memory/1172-19-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/1172-25-0x0000000000490000-0x0000000000496000-memory.dmp

Filesize
24KB

Download
memory/1172-27-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/3068-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/3068-1-0x00000000005E0000-0x00000000005E6000-memory.dmp

Filesize
24KB

Download
memory/3068-2-0x00000000005E0000-0x00000000005E6000-memory.dmp

Filesize
24KB

Download
memory/3068-3-0x0000000000600000-0x0000000000606000-memory.dmp

Filesize
24KB

Download
memory/3068-16-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download