6f550d5f589f3c1b0c3e9b65a47b22cfbcf72564f2f737d04ad113d70cfa249b

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, 21:38

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General

Target

2024-04-15_c0c87e81fccaa132dbaf2e0ff91f69e9_cryptolocker.exe
Size

51KB
MD5

c0c87e81fccaa132dbaf2e0ff91f69e9
SHA1

3179ce3bbf602e742180fa8dc9906cec170218cd
SHA256

6f550d5f589f3c1b0c3e9b65a47b22cfbcf72564f2f737d04ad113d70cfa249b
SHA512

47cd56d9c941cfb24024a465ba862c1e8eb857ee2ebd5349190f8005891cf5d1a0b4a83d7f290dc80e7002686db7ec193067e578caea38917dd7ae630336d627
SSDEEP

1536:nP+4zs2cPszL3MOtEvwDpj4Hy7B3g9CWuAxWLQ05BH:m4Q2ckzIOtEvwDpj4HYZ

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/3728-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x00070000000233d2-13.dat	CryptoLocker_rule2
behavioral2/memory/3728-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4476-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 2 IoCs

resource	yara_rule
behavioral2/memory/3728-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4476-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/3728-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x00070000000233d2-13.dat	UPX
behavioral2/memory/3728-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4476-26-0x0000000000500000-0x0000000000510000-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-1-5-21-1826666146-2574340311-1877551059-1000\Control Panel\International\Geo\Nation	2024-04-15_c0c87e81fccaa132dbaf2e0ff91f69e9_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4476	misid.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3728-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x00070000000233d2-13.dat	upx
behavioral2/memory/3728-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/4476-26-0x0000000000500000-0x0000000000510000-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 3728 wrote to memory of 4476	3728	2024-04-15_c0c87e81fccaa132dbaf2e0ff91f69e9_cryptolocker.exe	85
PID 3728 wrote to memory of 4476	3728	2024-04-15_c0c87e81fccaa132dbaf2e0ff91f69e9_cryptolocker.exe	85
PID 3728 wrote to memory of 4476	3728	2024-04-15_c0c87e81fccaa132dbaf2e0ff91f69e9_cryptolocker.exe	85

C:\Users\Admin\AppData\Local\Temp\2024-04-15_c0c87e81fccaa132dbaf2e0ff91f69e9_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-15_c0c87e81fccaa132dbaf2e0ff91f69e9_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3728
- C:\Users\Admin\AppData\Local\Temp\misid.exe
  "C:\Users\Admin\AppData\Local\Temp\misid.exe"
  2⤵
  - Executes dropped EXE
  PID:4476

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\misid.exe

Filesize
51KB

MD5
90f3dd9f376ac7ca163ca4691ce26668

SHA1
3ed50c5e19e85b151ec5c3149792471e74b9fb68

SHA256
7d3687a50e6a6bbf0b859455cdf321c1c52e566798c60bfb6e08a9dccf0a8625

SHA512
4a6a983945982acce7dd60fb4dff56a1c96e0112b0e2f0f417474638eb8a08685e07a92a5612f9f2383a22f969543883cb23e77c4ca36e88a487bebddcb53335

Download Submit
memory/3728-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3728-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/3728-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/3728-3-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/3728-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4476-19-0x0000000002100000-0x0000000002106000-memory.dmp

Filesize
24KB

Download
memory/4476-24-0x00000000020E0000-0x00000000020E6000-memory.dmp

Filesize
24KB

Download
memory/4476-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download