7c4c6ca9321eb095dfc6f5d0485cae8920336017bcf8a6c7fe3beb78b678ea52

Analysis

max time kernel
152s
max time network
161s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
17/04/2024, 17:37

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General

Target

2024-04-17_9b18ecd045905e07c4b5288edfb0e881_cryptolocker.exe
Size

89KB
MD5

9b18ecd045905e07c4b5288edfb0e881
SHA1

a827223c564c5a77687feae8f1a1e26dde2ce2b7
SHA256

7c4c6ca9321eb095dfc6f5d0485cae8920336017bcf8a6c7fe3beb78b678ea52
SHA512

1ebf0685d6dc26fe16b3b13788b3b1d5ed295bb6873b4e8b5e31aee6d67b6d44e150a621f81edd14c8e3995cd0603b13e2bf02ba2838550933fd45a6e61938fd
SSDEEP

1536:qkmnpomddpMOtEvwDpjJGYQbN/PKwMgdPR:AnBdOOtEvwDpj6zf

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/4444-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4444-2-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000800000002323f-14.dat	CryptoLocker_rule2
behavioral2/memory/2620-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/4444-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4444-2-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000800000002323f-14.dat	CryptoLocker_set1
behavioral2/memory/2620-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/4444-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/4444-2-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/files/0x000800000002323f-14.dat	UPX
behavioral2/memory/2620-26-0x0000000000500000-0x000000000050F000-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-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	2024-04-17_9b18ecd045905e07c4b5288edfb0e881_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2620	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4444-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/4444-2-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/files/0x000800000002323f-14.dat	upx
behavioral2/memory/2620-26-0x0000000000500000-0x000000000050F000-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 4444 wrote to memory of 2620	4444	2024-04-17_9b18ecd045905e07c4b5288edfb0e881_cryptolocker.exe	91
PID 4444 wrote to memory of 2620	4444	2024-04-17_9b18ecd045905e07c4b5288edfb0e881_cryptolocker.exe	91
PID 4444 wrote to memory of 2620	4444	2024-04-17_9b18ecd045905e07c4b5288edfb0e881_cryptolocker.exe	91

C:\Users\Admin\AppData\Local\Temp\2024-04-17_9b18ecd045905e07c4b5288edfb0e881_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-17_9b18ecd045905e07c4b5288edfb0e881_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4444
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2620

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:3248

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
90KB

MD5
bf7d0739db7617111117c918116f9be5

SHA1
4433a91c5d793e26df5b23f2415034f57c8a74fd

SHA256
677063402e2e3523e007d8dcc3974585e3976ba92325e6386ccda9e99a0e3a8d

SHA512
8b2ccd3cf50390814cffe4574e9ff344aa45dac149acd512d9f925e4f8fca642afacf18f84ee55a4e417d2853c37f0beb896a911e9113a8e4d9c98199cfe0b0c

Download Submit
memory/2620-20-0x00000000005C0000-0x00000000005C6000-memory.dmp

Filesize
24KB

Download
memory/2620-26-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2620-27-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/4444-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/4444-1-0x0000000000620000-0x0000000000626000-memory.dmp

Filesize
24KB

Download
memory/4444-2-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/4444-3-0x0000000000620000-0x0000000000626000-memory.dmp

Filesize
24KB

Download
memory/4444-4-0x0000000000750000-0x0000000000756000-memory.dmp

Filesize
24KB

Download