a9e9deb6d949e0697b3e65e3321e38209a5c6c02b488109cb337fc3a3ee1dde3

Analysis

max time kernel
148s
max time network
155s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
11-03-2024 01:36

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General

Target

2024-03-11_d5d6ccc5244b709c8bc189873248101d_cryptolocker.exe
Size

63KB
MD5

d5d6ccc5244b709c8bc189873248101d
SHA1

613b0827d3d8c0c6a6e8ae447b406a013b2b4ce0
SHA256

a9e9deb6d949e0697b3e65e3321e38209a5c6c02b488109cb337fc3a3ee1dde3
SHA512

3201a25212749add75e4f7dd9cbf89e09e4baefcfa5ac1583adbf833b0bf1f8f0259a527e046a94922d3e775aab1637105371be5bbf1c4c6a956d77cd6b77647
SSDEEP

768:zQz7yVEhs9+syJP6ntOOtEvwDpjFelaB7yBEY9Su8F5mnVzCBRb:zj+soPSMOtEvwDpj4kpmeLmnZ+

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/4008-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0004000000022747-13.dat	CryptoLocker_rule2
behavioral2/memory/4008-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4844-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/4008-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0004000000022747-13.dat	CryptoLocker_set1
behavioral2/memory/4008-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4844-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/4008-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x0004000000022747-13.dat	UPX
behavioral2/memory/4008-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4844-26-0x0000000000500000-0x0000000000510000-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-1-5-21-2727153400-192325109-1870347593-1000\Control Panel\International\Geo\Nation	2024-03-11_d5d6ccc5244b709c8bc189873248101d_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4844	misid.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4008-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x0004000000022747-13.dat	upx
behavioral2/memory/4008-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/4844-26-0x0000000000500000-0x0000000000510000-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 4008 wrote to memory of 4844	4008	2024-03-11_d5d6ccc5244b709c8bc189873248101d_cryptolocker.exe	89
PID 4008 wrote to memory of 4844	4008	2024-03-11_d5d6ccc5244b709c8bc189873248101d_cryptolocker.exe	89
PID 4008 wrote to memory of 4844	4008	2024-03-11_d5d6ccc5244b709c8bc189873248101d_cryptolocker.exe	89

C:\Users\Admin\AppData\Local\Temp\2024-03-11_d5d6ccc5244b709c8bc189873248101d_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-11_d5d6ccc5244b709c8bc189873248101d_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4008
- C:\Users\Admin\AppData\Local\Temp\misid.exe
  "C:\Users\Admin\AppData\Local\Temp\misid.exe"
  2⤵
  - Executes dropped EXE
  PID:4844

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\misid.exe

Filesize
63KB

MD5
a9e5f2bd0c8c43311fb545ddd3dca977

SHA1
c3ed8eae761c5984bcf3b14625dd01d9d885582f

SHA256
3f63817fd37e929214a92f4ace1188dda52e82b2aef526e6d32302204d93ba69

SHA512
d64860c8577f1c3643e498e4e4bf7edf50bd7ccc96d0ce64fa1dc27b0c588423645a9e7b33bef9617b54cf88d635b8897fe9b9a963e7e5bbd8c73b44349af3de

Download Submit
memory/4008-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4008-1-0x0000000000630000-0x0000000000636000-memory.dmp

Filesize
24KB

Download
memory/4008-2-0x0000000000630000-0x0000000000636000-memory.dmp

Filesize
24KB

Download
memory/4008-3-0x0000000000650000-0x0000000000656000-memory.dmp

Filesize
24KB

Download
memory/4008-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4844-19-0x0000000002050000-0x0000000002056000-memory.dmp

Filesize
24KB

Download
memory/4844-20-0x0000000002070000-0x0000000002076000-memory.dmp

Filesize
24KB

Download
memory/4844-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download