9658bbf8f4eb934642dd986caa81d5d0fe2c7baa305becb7de9807bab0df03df

Analysis

max time kernel
150s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
05/04/2024, 05:48

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General

Target

2024-04-05_c691bc7c46c8e7cd7f7ef4dc40b3372b_cryptolocker.exe
Size

21KB
MD5

c691bc7c46c8e7cd7f7ef4dc40b3372b
SHA1

46931ba4b7631b5f8244942ed44fe3ebf6f96936
SHA256

9658bbf8f4eb934642dd986caa81d5d0fe2c7baa305becb7de9807bab0df03df
SHA512

e51023be84e46f64506f3e502ae20c5c96f891f175d96e746c53d28616658c3a715d672f5032c8c39542ec90e789cd3060d00250fc7c0ab7a756f885c997b914
SSDEEP

384:bVCPwFRuFn65arz1ZhdaXFXSCVQTLfjDpl:bVCPwFRo6CpwXFXSqQXfjb

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/4372-0-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000a000000023194-13.dat	CryptoLocker_rule2
behavioral2/memory/2032-18-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4372-17-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2032-27-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/4372-0-0x0000000008000000-0x000000000800E000-memory.dmp	UPX
behavioral2/files/0x000a000000023194-13.dat	UPX
behavioral2/memory/2032-18-0x0000000008000000-0x000000000800E000-memory.dmp	UPX
behavioral2/memory/4372-17-0x0000000008000000-0x000000000800E000-memory.dmp	UPX
behavioral2/memory/2032-27-0x0000000008000000-0x000000000800E000-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-1-5-21-275798769-4264537674-1142822080-1000\Control Panel\International\Geo\Nation	2024-04-05_c691bc7c46c8e7cd7f7ef4dc40b3372b_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2032	hasfj.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4372-0-0x0000000008000000-0x000000000800E000-memory.dmp	upx
behavioral2/files/0x000a000000023194-13.dat	upx
behavioral2/memory/2032-18-0x0000000008000000-0x000000000800E000-memory.dmp	upx
behavioral2/memory/4372-17-0x0000000008000000-0x000000000800E000-memory.dmp	upx
behavioral2/memory/2032-27-0x0000000008000000-0x000000000800E000-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 4372 wrote to memory of 2032	4372	2024-04-05_c691bc7c46c8e7cd7f7ef4dc40b3372b_cryptolocker.exe	88
PID 4372 wrote to memory of 2032	4372	2024-04-05_c691bc7c46c8e7cd7f7ef4dc40b3372b_cryptolocker.exe	88
PID 4372 wrote to memory of 2032	4372	2024-04-05_c691bc7c46c8e7cd7f7ef4dc40b3372b_cryptolocker.exe	88

C:\Users\Admin\AppData\Local\Temp\2024-04-05_c691bc7c46c8e7cd7f7ef4dc40b3372b_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-05_c691bc7c46c8e7cd7f7ef4dc40b3372b_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4372
- C:\Users\Admin\AppData\Local\Temp\hasfj.exe
  "C:\Users\Admin\AppData\Local\Temp\hasfj.exe"
  2⤵
  - Executes dropped EXE
  PID:2032

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
21KB

MD5
76e864601eb9e4370ba626cf2d47bdd1

SHA1
be634f482acad8b27d0b4d0dde2698657f8ff3a5

SHA256
fe2d7ab3016088169e31b34b7fb34ce57e5a37ee023779965e32a902ec1bb012

SHA512
a6b36d6263b1ccf1a873364b38833f0e98771e432ebd499364694166d2c7da82379702768089bd4a731e600cdb90d2a045b5e4c1efc7d06a992331a7aa05f2cf

Download Submit
memory/2032-18-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download
memory/2032-20-0x0000000002ED0000-0x0000000002ED6000-memory.dmp

Filesize
24KB

Download
memory/2032-21-0x00000000020A0000-0x00000000020A6000-memory.dmp

Filesize
24KB

Download
memory/2032-27-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download
memory/4372-0-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download
memory/4372-1-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

Filesize
24KB

Download
memory/4372-2-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

Filesize
24KB

Download
memory/4372-3-0x0000000003150000-0x0000000003156000-memory.dmp

Filesize
24KB

Download
memory/4372-17-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download