6f7f3297ab897d2e76cc6cc5090f33ab7fea9e225192817cddb735c5b87eafa9

Analysis

max time kernel
150s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
09/05/2024, 03:42

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General

Target

2024-05-09_81b63f2c8839eb1b979be08272fa6a92_cryptolocker.exe
Size

22KB
MD5

81b63f2c8839eb1b979be08272fa6a92
SHA1

5f7bd50cc0599cfa9371c4fca3e92e7f6eed0fa7
SHA256

6f7f3297ab897d2e76cc6cc5090f33ab7fea9e225192817cddb735c5b87eafa9
SHA512

06cf640970c65a63c714990469315f461afe4275715372f97b52a79e082e131015dd5897267ad57bc678c399ae921368b3654cf04a19c4baad5c3f85c2cd2253
SSDEEP

384:bVCPwFRuFn65arz1ZhdaXFXSCVQTLfjDp6HMT:bVCPwFRo6CpwXFXSqQXfjAsT

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/5084-0-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000500000002326f-13.dat	CryptoLocker_rule2
behavioral2/memory/4612-19-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/5084-18-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4612-28-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/5084-0-0x0000000008000000-0x000000000800E000-memory.dmp	UPX
behavioral2/files/0x000500000002326f-13.dat	UPX
behavioral2/memory/4612-19-0x0000000008000000-0x000000000800E000-memory.dmp	UPX
behavioral2/memory/5084-18-0x0000000008000000-0x000000000800E000-memory.dmp	UPX
behavioral2/memory/4612-28-0x0000000008000000-0x000000000800E000-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-1-5-21-2539840389-1261165778-1087677076-1000\Control Panel\International\Geo\Nation	2024-05-09_81b63f2c8839eb1b979be08272fa6a92_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4612	hasfj.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/5084-0-0x0000000008000000-0x000000000800E000-memory.dmp	upx
behavioral2/files/0x000500000002326f-13.dat	upx
behavioral2/memory/4612-19-0x0000000008000000-0x000000000800E000-memory.dmp	upx
behavioral2/memory/5084-18-0x0000000008000000-0x000000000800E000-memory.dmp	upx
behavioral2/memory/4612-28-0x0000000008000000-0x000000000800E000-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 5084 wrote to memory of 4612	5084	2024-05-09_81b63f2c8839eb1b979be08272fa6a92_cryptolocker.exe	79
PID 5084 wrote to memory of 4612	5084	2024-05-09_81b63f2c8839eb1b979be08272fa6a92_cryptolocker.exe	79
PID 5084 wrote to memory of 4612	5084	2024-05-09_81b63f2c8839eb1b979be08272fa6a92_cryptolocker.exe	79

C:\Users\Admin\AppData\Local\Temp\2024-05-09_81b63f2c8839eb1b979be08272fa6a92_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-09_81b63f2c8839eb1b979be08272fa6a92_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:5084
- C:\Users\Admin\AppData\Local\Temp\hasfj.exe
  "C:\Users\Admin\AppData\Local\Temp\hasfj.exe"
  2⤵
  - Executes dropped EXE
  PID:4612

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\hasfj.exe

Filesize
23KB

MD5
3aa86e580682f9ec870df728b963f777

SHA1
f67cfe3943ab6e3f0193799a1ff4b0708823519f

SHA256
be98a87756dd5913074289b33cb68a02ef0af6d2ec94515bae09f7e5895edcf6

SHA512
f2b7b8f9fb292b8c07569c79ec5041e508c98aeb64c7b251bdd9592537a2b1901d718e15ce4732041b649e3478ac273c4763d89de70540202db13c19e6a6bf65

Download Submit
memory/4612-19-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download
memory/4612-21-0x00000000020D0000-0x00000000020D6000-memory.dmp

Filesize
24KB

Download
memory/4612-22-0x0000000003150000-0x0000000003156000-memory.dmp

Filesize
24KB

Download
memory/4612-28-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download
memory/5084-0-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download
memory/5084-1-0x0000000002210000-0x0000000002216000-memory.dmp

Filesize
24KB

Download
memory/5084-3-0x00000000022C0000-0x00000000022C6000-memory.dmp

Filesize
24KB

Download
memory/5084-2-0x0000000002210000-0x0000000002216000-memory.dmp

Filesize
24KB

Download
memory/5084-18-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download