c96c73475c4040a1e8685ca8e3ab98899be5ae42654b486c69110a80c6bef5b5

Analysis

max time kernel
148s
max time network
154s
platform
windows10-2004_x64
resource
win10v2004-20240419-en
resource tags

arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
submitted
03/05/2024, 03:27

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General

Target

2024-05-03_18686c6dbe35a0be36446b561edff217_cryptolocker.exe
Size

38KB
MD5

18686c6dbe35a0be36446b561edff217
SHA1

81a334eb75250bd203e99edc3444f8563b8389a4
SHA256

c96c73475c4040a1e8685ca8e3ab98899be5ae42654b486c69110a80c6bef5b5
SHA512

5abaf173dcf1d12d27b9c9f3b6580d43ba64d0f62df306b0d9dd05d6db010c94ce012561b653c23ca1d0886ffd0f694c2bbda3591aa8d19bdbf20d7192a00806
SSDEEP

768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITY9V:qDdFJy3QMOtEvwDpjjWMl7TO

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/4016-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000d000000023b21-13.dat	CryptoLocker_rule2
behavioral2/memory/4016-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1716-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/4016-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000d000000023b21-13.dat	CryptoLocker_set1
behavioral2/memory/4016-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1716-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/4016-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000d000000023b21-13.dat	UPX
behavioral2/memory/4016-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/1716-26-0x0000000000500000-0x0000000000510000-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-1-5-21-2818691465-3043947619-2475182763-1000\Control Panel\International\Geo\Nation	2024-05-03_18686c6dbe35a0be36446b561edff217_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1716	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4016-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x000d000000023b21-13.dat	upx
behavioral2/memory/4016-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/1716-26-0x0000000000500000-0x0000000000510000-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 4016 wrote to memory of 1716	4016	2024-05-03_18686c6dbe35a0be36446b561edff217_cryptolocker.exe	84
PID 4016 wrote to memory of 1716	4016	2024-05-03_18686c6dbe35a0be36446b561edff217_cryptolocker.exe	84
PID 4016 wrote to memory of 1716	4016	2024-05-03_18686c6dbe35a0be36446b561edff217_cryptolocker.exe	84

C:\Users\Admin\AppData\Local\Temp\2024-05-03_18686c6dbe35a0be36446b561edff217_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-03_18686c6dbe35a0be36446b561edff217_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4016
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1716

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
39KB

MD5
359840034c9f1db845b60c602e86310d

SHA1
ff0c8afe502261e6f6b52e43ceed23dcc048e015

SHA256
df565fc38776e2b9f4865f4df800f8223da0dd4c20dd5866665b4bf8cf3eb618

SHA512
6b64df89daea8e7aefe4408afff215fe32104458acb1943f1f66912218727d0f9a14434468c10465b1e71a7a0bf8736994e7016f03deb392e602c4b81fe00cdf

Download Submit
memory/1716-19-0x00000000006E0000-0x00000000006E6000-memory.dmp

Filesize
24KB

Download
memory/1716-25-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/1716-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4016-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4016-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/4016-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/4016-3-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/4016-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download