03c6f19e5d4ac8da3e23ec26aa5a82b265bc459e7d89d4ca7bb83b62dde54385

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
14/03/2024, 07:35

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General

Target

2024-03-14_55bb6f0a3a13f99c232a7437e882dbdd_cryptolocker.exe
Size

71KB
MD5

55bb6f0a3a13f99c232a7437e882dbdd
SHA1

c5d8045a818ff26cc2ccf21cbc5ed965249022e3
SHA256

03c6f19e5d4ac8da3e23ec26aa5a82b265bc459e7d89d4ca7bb83b62dde54385
SHA512

8170b38596c76128e0445966177feb6322541be3a9615840cfe27ba4a3ff31d5c50d3afb3006778f568baba622f8f5269b26147bad7fc2a84a43de2d2d210854
SSDEEP

1536:P8mnK6QFElP6n+gymddpMOtEvwDpjIHsal3Sl:1nK6a+qdOOtEvwDpj8U

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/3032-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000300000001e9a0-13.dat	CryptoLocker_rule2
behavioral2/memory/3032-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2808-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/3032-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000300000001e9a0-13.dat	CryptoLocker_set1
behavioral2/memory/3032-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/memory/2808-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/3032-0-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/files/0x000300000001e9a0-13.dat	UPX
behavioral2/memory/3032-17-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/memory/2808-26-0x0000000000500000-0x000000000050F311-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-1-5-21-275798769-4264537674-1142822080-1000\Control Panel\International\Geo\Nation	2024-03-14_55bb6f0a3a13f99c232a7437e882dbdd_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2808	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3032-0-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/files/0x000300000001e9a0-13.dat	upx
behavioral2/memory/3032-17-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/memory/2808-26-0x0000000000500000-0x000000000050F311-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 3032 wrote to memory of 2808	3032	2024-03-14_55bb6f0a3a13f99c232a7437e882dbdd_cryptolocker.exe	88
PID 3032 wrote to memory of 2808	3032	2024-03-14_55bb6f0a3a13f99c232a7437e882dbdd_cryptolocker.exe	88
PID 3032 wrote to memory of 2808	3032	2024-03-14_55bb6f0a3a13f99c232a7437e882dbdd_cryptolocker.exe	88

C:\Users\Admin\AppData\Local\Temp\2024-03-14_55bb6f0a3a13f99c232a7437e882dbdd_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-14_55bb6f0a3a13f99c232a7437e882dbdd_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3032
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2808

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
71KB

MD5
1c01b543c1f6d56ab7809390bedacd6d

SHA1
b5cafdb95b867c9c48d0243aa806e5dac02237a3

SHA256
9042c1a58e9112d9b9aa5d2e064809c69172533e7414a4079928b3f89c2da87f

SHA512
3003c8c933b1610cde2caa38204e583aaa9893438774aa22889bb216cdbca02564324510ba9e6e76ce6fe5548cfd57383d8f9d190e3da28336a7a7586225bb9b

Download Submit
memory/2808-19-0x0000000001F70000-0x0000000001F76000-memory.dmp

Filesize
24KB

Download
memory/2808-22-0x0000000001F50000-0x0000000001F56000-memory.dmp

Filesize
24KB

Download
memory/2808-26-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/3032-0-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/3032-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/3032-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/3032-3-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/3032-17-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download