cb3cbd7e17d8270fbf825762b6a341bf168cd2e5330bf51e2c4a3a1cb6d46a30

General

Target

2024-05-16_54b778f5067e7c36cf29e2d35fdd5aae_cryptolocker.exe
Size

91KB
MD5

54b778f5067e7c36cf29e2d35fdd5aae
SHA1

93b0e970be6eca74c2467c7e8c3e82bc2e7c186e
SHA256

cb3cbd7e17d8270fbf825762b6a341bf168cd2e5330bf51e2c4a3a1cb6d46a30
SHA512

6a52122d9c172c6d0da390e112433a9f68ed64299cd240fab878d3d591157b6950e7985ead7b7d416f326bd98a5c021b886bb60ff47d7e5811b1c0084455c9eb
SSDEEP

1536:qkmnpomddpMOtEvwDpjJGYQbN/PKwMgddjI:AnBdOOtEvwDpj6zA

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/3044-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0005000000022975-13.dat	CryptoLocker_rule2
behavioral2/memory/3604-19-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3044-18-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3604-28-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral2/memory/3044-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0005000000022975-13.dat	CryptoLocker_set1
behavioral2/memory/3604-19-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3044-18-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3604-28-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/3044-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/files/0x0005000000022975-13.dat	UPX
behavioral2/memory/3604-19-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/3044-18-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/3604-28-0x0000000000500000-0x000000000050F000-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-1-5-21-1181767204-2009306918-3718769404-1000\Control Panel\International\Geo\Nation	2024-05-16_54b778f5067e7c36cf29e2d35fdd5aae_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3604	asih.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3044-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/files/0x0005000000022975-13.dat	upx
behavioral2/memory/3604-19-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/3044-18-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/3604-28-0x0000000000500000-0x000000000050F000-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 3044 wrote to memory of 3604	3044	2024-05-16_54b778f5067e7c36cf29e2d35fdd5aae_cryptolocker.exe	92
PID 3044 wrote to memory of 3604	3044	2024-05-16_54b778f5067e7c36cf29e2d35fdd5aae_cryptolocker.exe	92
PID 3044 wrote to memory of 3604	3044	2024-05-16_54b778f5067e7c36cf29e2d35fdd5aae_cryptolocker.exe	92

C:\Users\Admin\AppData\Local\Temp\2024-05-16_54b778f5067e7c36cf29e2d35fdd5aae_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-16_54b778f5067e7c36cf29e2d35fdd5aae_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3044
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3604

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=4116,i,11266875042087428226,16669718873272757238,262144 --variations-seed-version --mojo-platform-channel-handle=3900 /prefetch:8
1⤵
PID:2416

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

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
91KB

MD5
96a936ec0d70af53cca2210824150b31

SHA1
480395776b5c6a764f3de21747501c17c449caed

SHA256
dd7684b61c66b20e45e35d2f91a0252a839150a90820d67481c5435070598678

SHA512
45ca740232ea7bab443abcc72abeb70d97204710ee4209f7c67e2ebdc9244dfaf118f9197624dc92198e7974b8de292d2f24dbf6819c6241736a69e906e46d97

Download Submit
memory/3044-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/3044-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/3044-2-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/3044-8-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/3044-18-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/3604-19-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/3604-21-0x00000000005D0000-0x00000000005D6000-memory.dmp

Filesize
24KB

Download
memory/3604-27-0x00000000005B0000-0x00000000005B6000-memory.dmp

Filesize
24KB

Download
memory/3604-28-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download

Analysis

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