d6a953ab1adda8c2612fcf11ee58761e4922ed3eb46c4ff289667446f1cae3c3

Analysis

max time kernel
142s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240221-en
resource tags

arch:x64arch:x86image:win10v2004-20240221-enlocale:en-usos:windows10-2004-x64system
submitted
22/02/2024, 17:30

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General

Target

2024-02-22_2e1676073d2b3d48b9c2e377da06150c_cryptolocker.exe
Size

63KB
MD5

2e1676073d2b3d48b9c2e377da06150c
SHA1

89f7e5602f105bd52f576160e9dda4a91a434c7f
SHA256

d6a953ab1adda8c2612fcf11ee58761e4922ed3eb46c4ff289667446f1cae3c3
SHA512

c57da8574ce278a86580d0036ecd0905069efbde11686c31a4b888f91a0e50aab11d207444901da47e01212be59271b6c3c7e9252b3d6676afa4e7d8da959314
SSDEEP

768:zQz7yVEhs9+syJP6ntOOtEvwDpjFelaB7yBEY9Su8F5mLZ5K7B:zj+soPSMOtEvwDpj4kpmeLmi

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/4636-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0009000000023139-13.dat	CryptoLocker_rule2
behavioral2/memory/4636-25-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/408-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/4636-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0009000000023139-13.dat	CryptoLocker_set1
behavioral2/memory/4636-25-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/408-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/4636-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x0009000000023139-13.dat	UPX
behavioral2/memory/4636-25-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/408-26-0x0000000000500000-0x0000000000510000-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-1-5-21-3844919115-497234255-166257750-1000\Control Panel\International\Geo\Nation	2024-02-22_2e1676073d2b3d48b9c2e377da06150c_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
408	misid.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4636-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x0009000000023139-13.dat	upx
behavioral2/memory/4636-25-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/408-26-0x0000000000500000-0x0000000000510000-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 4636 wrote to memory of 408	4636	2024-02-22_2e1676073d2b3d48b9c2e377da06150c_cryptolocker.exe	85
PID 4636 wrote to memory of 408	4636	2024-02-22_2e1676073d2b3d48b9c2e377da06150c_cryptolocker.exe	85
PID 4636 wrote to memory of 408	4636	2024-02-22_2e1676073d2b3d48b9c2e377da06150c_cryptolocker.exe	85

C:\Users\Admin\AppData\Local\Temp\2024-02-22_2e1676073d2b3d48b9c2e377da06150c_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-22_2e1676073d2b3d48b9c2e377da06150c_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4636
- C:\Users\Admin\AppData\Local\Temp\misid.exe
  "C:\Users\Admin\AppData\Local\Temp\misid.exe"
  2⤵
  - Executes dropped EXE
  PID:408

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
64KB

MD5
9eb1f9c5f504d808e20d3a3df352c757

SHA1
955e9bd69d6b97394613de04cea000a0d661b798

SHA256
d7b9966c3f8832183f584927e0e724b44a9cae16c01661d54a8fb606e0dad136

SHA512
26b87f479a9d32049dab0e58e8467bc6a7251f1fbe822ca84425f0159244f07e902b59de487530c4723ead0fa2583ab08ee0df8c3c622611185246fdd81cd52d

Download Submit
memory/408-18-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/408-19-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/408-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4636-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4636-1-0x0000000002300000-0x0000000002306000-memory.dmp

Filesize
24KB

Download
memory/4636-2-0x0000000002300000-0x0000000002306000-memory.dmp

Filesize
24KB

Download
memory/4636-3-0x0000000002220000-0x0000000002226000-memory.dmp

Filesize
24KB

Download
memory/4636-25-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download