b8ac909d7fbc3c6b64fac8e999b073961af82c2c0bf47b347f6718ce434dfe9a

Analysis

max time kernel
148s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
11/03/2024, 01:24

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General

Target

2024-03-11_0c1c847c1a5dac22591af370c21ccceb_cryptolocker.exe
Size

95KB
MD5

0c1c847c1a5dac22591af370c21ccceb
SHA1

1344900159eaaad894b419f5ebea52bf2853c94f
SHA256

b8ac909d7fbc3c6b64fac8e999b073961af82c2c0bf47b347f6718ce434dfe9a
SHA512

9334d10908d358ae7d7dbba732c5d07012997c2619173e5b3724a77c243bc11b0b690770994d485342327b7cbd01c46acea2076a023f2e3f1aed881e834ddbb5
SSDEEP

1536:qkmnpomddpMOtEvwDpjJGYQbN/PKwNgp01Os:AnBdOOtEvwDpj6zj

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/3604-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0007000000023039-13.dat	CryptoLocker_rule2
behavioral2/memory/3604-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4092-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/3604-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0007000000023039-13.dat	CryptoLocker_set1
behavioral2/memory/3604-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4092-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/3604-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/files/0x0007000000023039-13.dat	UPX
behavioral2/memory/3604-17-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/4092-26-0x0000000000500000-0x000000000050F000-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-1-5-21-1497073144-2389943819-3385106915-1000\Control Panel\International\Geo\Nation	2024-03-11_0c1c847c1a5dac22591af370c21ccceb_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4092	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3604-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/files/0x0007000000023039-13.dat	upx
behavioral2/memory/3604-17-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/4092-26-0x0000000000500000-0x000000000050F000-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 3604 wrote to memory of 4092	3604	2024-03-11_0c1c847c1a5dac22591af370c21ccceb_cryptolocker.exe	85
PID 3604 wrote to memory of 4092	3604	2024-03-11_0c1c847c1a5dac22591af370c21ccceb_cryptolocker.exe	85
PID 3604 wrote to memory of 4092	3604	2024-03-11_0c1c847c1a5dac22591af370c21ccceb_cryptolocker.exe	85

C:\Users\Admin\AppData\Local\Temp\2024-03-11_0c1c847c1a5dac22591af370c21ccceb_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-11_0c1c847c1a5dac22591af370c21ccceb_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3604
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4092

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
95KB

MD5
c957140c6291286f8157c1d5cc90edce

SHA1
04795f31e4f30df6aa13bfdb2be6e4d46f65eead

SHA256
28c42a23cf79b2311a898094898618e2d3adbf086f252e4b2b5414dbd15f22ec

SHA512
ff0ffe4f132634ea453f2580afb28ce51157cd726675e8874df4d7e16527528c2449d78bc02710e9ecbc2e01c8ebcbdf3ba843b4aa62b463fcfb06044a15b698

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

Filesize
60KB

Download
memory/3604-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/3604-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/3604-3-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/3604-17-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/4092-19-0x0000000001FF0000-0x0000000001FF6000-memory.dmp

Filesize
24KB

Download
memory/4092-20-0x00000000006B0000-0x00000000006B6000-memory.dmp

Filesize
24KB

Download
memory/4092-26-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download