4d053be04b012a23e2953526e6132222f6ba35b73457cc275da2c9098fcb7f41

Analysis

max time kernel
148s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
08/03/2024, 01:40

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General

Target

2024-03-08_6b9660566936c0cf922d29d9e711371f_cryptolocker.exe
Size

75KB
MD5

6b9660566936c0cf922d29d9e711371f
SHA1

3adfec74a7a127d30f6c87451f9e79114b6b9d41
SHA256

4d053be04b012a23e2953526e6132222f6ba35b73457cc275da2c9098fcb7f41
SHA512

cf6d4750080a95b9381ae0fe2e6bfcf8f6a71268ca0a56111b8a87e72e957d6cf6eb5ec9a64e20c2a1cc1da55bfc2c530896577812bbcb927bfcedfc72610e27
SSDEEP

1536:T6QFElP6n+gxmddpMOtEvwDpjwaxTNUOAkXtBdJcRN:T6a+rdOOtEvwDpjNtg

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/2808-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0008000000023203-13.dat	CryptoLocker_rule2
behavioral2/memory/2808-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1056-25-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/2808-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0008000000023203-13.dat	CryptoLocker_set1
behavioral2/memory/2808-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1056-25-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/2808-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x0008000000023203-13.dat	UPX
behavioral2/memory/2808-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/1056-25-0x0000000000500000-0x0000000000510000-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-1-5-21-983155329-280873152-1838004294-1000\Control Panel\International\Geo\Nation	2024-03-08_6b9660566936c0cf922d29d9e711371f_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1056	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2808-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x0008000000023203-13.dat	upx
behavioral2/memory/2808-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/1056-25-0x0000000000500000-0x0000000000510000-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 2808 wrote to memory of 1056	2808	2024-03-08_6b9660566936c0cf922d29d9e711371f_cryptolocker.exe	87
PID 2808 wrote to memory of 1056	2808	2024-03-08_6b9660566936c0cf922d29d9e711371f_cryptolocker.exe	87
PID 2808 wrote to memory of 1056	2808	2024-03-08_6b9660566936c0cf922d29d9e711371f_cryptolocker.exe	87

C:\Users\Admin\AppData\Local\Temp\2024-03-08_6b9660566936c0cf922d29d9e711371f_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-08_6b9660566936c0cf922d29d9e711371f_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2808
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1056

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
75KB

MD5
0f11e8717eb44b169a77f5e52c260fd5

SHA1
6e71e85d393cb790fab9ab04b89fd554a7dc9290

SHA256
0f47ad0cea0d1b78bc9aea96ba085bbc5450c618ecd00a9ce364ae44f9506709

SHA512
af8e34e0bce13bb27d08844cae505850125ddf527196cb871e1733dad5cc9c92e52dbe8c7f9440fa078dd1d677d53685465838ce040df34228596a4d325d0cc6

Download Submit
memory/1056-19-0x00000000006E0000-0x00000000006E6000-memory.dmp

Filesize
24KB

Download
memory/1056-25-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2808-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2808-1-0x00000000006B0000-0x00000000006B6000-memory.dmp

Filesize
24KB

Download
memory/2808-2-0x00000000006B0000-0x00000000006B6000-memory.dmp

Filesize
24KB

Download
memory/2808-3-0x00000000006D0000-0x00000000006D6000-memory.dmp

Filesize
24KB

Download
memory/2808-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download