b2cd76fe890332645461c1f554b4529c38ef461e1d6463cd89383f3430184d28

Analysis

max time kernel
149s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
06-04-2024 02:51

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General

Target

2024-04-06_b57db6b4ac9aabc1352fff218d2a242c_cryptolocker.exe
Size

100KB
MD5

b57db6b4ac9aabc1352fff218d2a242c
SHA1

42067f45e4afaa877653f5f1f4d73e00baa06dc3
SHA256

b2cd76fe890332645461c1f554b4529c38ef461e1d6463cd89383f3430184d28
SHA512

219ee2fa3e4710fba523b85dcf8d8435fccd923d81f2a3c04297963bdc13953d481b31b5a9f90866eec6f04b4c41f58245114f89f39e3d3ad770b816592e93f2
SSDEEP

1536:qkmnpomddpMOtEvwDpjJGYQbN/PKwNgpwqWsviPy8+:AnBdOOtEvwDpj6zu

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/2716-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000a000000023204-13.dat	CryptoLocker_rule2
behavioral2/memory/2716-16-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3264-25-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/2716-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000a000000023204-13.dat	CryptoLocker_set1
behavioral2/memory/2716-16-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3264-25-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/2716-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/files/0x000a000000023204-13.dat	UPX
behavioral2/memory/2716-16-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/3264-25-0x0000000000500000-0x000000000050F000-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-1-5-21-983155329-280873152-1838004294-1000\Control Panel\International\Geo\Nation	2024-04-06_b57db6b4ac9aabc1352fff218d2a242c_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3264	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2716-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/files/0x000a000000023204-13.dat	upx
behavioral2/memory/2716-16-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/3264-25-0x0000000000500000-0x000000000050F000-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 2716 wrote to memory of 3264	2716	2024-04-06_b57db6b4ac9aabc1352fff218d2a242c_cryptolocker.exe	87
PID 2716 wrote to memory of 3264	2716	2024-04-06_b57db6b4ac9aabc1352fff218d2a242c_cryptolocker.exe	87
PID 2716 wrote to memory of 3264	2716	2024-04-06_b57db6b4ac9aabc1352fff218d2a242c_cryptolocker.exe	87

C:\Users\Admin\AppData\Local\Temp\2024-04-06_b57db6b4ac9aabc1352fff218d2a242c_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-06_b57db6b4ac9aabc1352fff218d2a242c_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2716
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3264

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

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Downloads

C:\Users\Admin\AppData\Local\Temp\asih.exe

Filesize
100KB

MD5
850c7546c9330e226712d19e95397ad3

SHA1
e14ac50eb9543b5e90a2166ae784bfcbf317426b

SHA256
520fc1e387d5675c1288e4e5178f45ed752b966d7b1a6c1808c26cf6e1b97331

SHA512
3c111080061ec26bb2316880e63b55a51978f3df66dcb5fe311ec7c63a35a4204c4a964a7b272014466cd970ca02d2ae4815fbb752732409f36257d2d1b62bf0

Download Submit
memory/2716-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2716-1-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/2716-2-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/2716-3-0x00000000005D0000-0x00000000005D6000-memory.dmp

Filesize
24KB

Download
memory/2716-16-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/3264-19-0x00000000005C0000-0x00000000005C6000-memory.dmp

Filesize
24KB

Download
memory/3264-25-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download