99c8fec39e23b81ab2dcafc33706ea8edd9fc8069c0cee664ecc277f7b34976f

Analysis

max time kernel
150s
max time network
149s
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, 16:42

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General

Target

2024-02-22_cfeaba4fa7ac80cce62352dfc68810f5_cryptolocker.exe
Size

91KB
MD5

cfeaba4fa7ac80cce62352dfc68810f5
SHA1

838da17ca96d315385884000524221ccf5a8786e
SHA256

99c8fec39e23b81ab2dcafc33706ea8edd9fc8069c0cee664ecc277f7b34976f
SHA512

113c8c1a7475e523529116ae3c5e59f8b9eccf0edad4aa90e7f7cd684156d1f9218060b696727fdabe60f868c2c6208242107284a478224be3188115217c29f6
SSDEEP

1536:zj+soPSMOtEvwDpj4ktBl01hJl8QAPM8Ho6cRMy87UvTT:zCsanOtEvwDpjS

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/4604-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000700000002322b-13.dat	CryptoLocker_rule2
behavioral2/memory/4604-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4092-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/4604-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000700000002322b-13.dat	CryptoLocker_set1
behavioral2/memory/4604-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4092-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/4604-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000700000002322b-13.dat	UPX
behavioral2/memory/4604-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4092-26-0x0000000000500000-0x0000000000510000-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-1-5-21-1712835645-2080934712-2142796781-1000\Control Panel\International\Geo\Nation	2024-02-22_cfeaba4fa7ac80cce62352dfc68810f5_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4092	misid.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4604-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x000700000002322b-13.dat	upx
behavioral2/memory/4604-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/4092-26-0x0000000000500000-0x0000000000510000-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 4604 wrote to memory of 4092	4604	2024-02-22_cfeaba4fa7ac80cce62352dfc68810f5_cryptolocker.exe	88
PID 4604 wrote to memory of 4092	4604	2024-02-22_cfeaba4fa7ac80cce62352dfc68810f5_cryptolocker.exe	88
PID 4604 wrote to memory of 4092	4604	2024-02-22_cfeaba4fa7ac80cce62352dfc68810f5_cryptolocker.exe	88

C:\Users\Admin\AppData\Local\Temp\2024-02-22_cfeaba4fa7ac80cce62352dfc68810f5_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-22_cfeaba4fa7ac80cce62352dfc68810f5_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4604
- C:\Users\Admin\AppData\Local\Temp\misid.exe
  "C:\Users\Admin\AppData\Local\Temp\misid.exe"
  2⤵
  - Executes dropped EXE
  PID:4092

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
91KB

MD5
78d196f1876396e145e9823219a9061e

SHA1
b32b960b771aff2eaf8f659e2aa64ff429e401d6

SHA256
1fdbeb9c52dc7a3e38777f1b393b15b2f3f64acae4a682d38f119d28a6fae703

SHA512
8304253383c2730de21a72ed72e1bb0410085d10145d58bc2f0d2b4a16e356c5ee0f58b4438b80ac7aef9b73f1ac672a622cd6366d0a7e333269771dfcf239c6

Download Submit
memory/4092-19-0x00000000005C0000-0x00000000005C6000-memory.dmp

Filesize
24KB

Download
memory/4092-25-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/4092-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4604-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4604-1-0x0000000000650000-0x0000000000656000-memory.dmp

Filesize
24KB

Download
memory/4604-2-0x0000000000650000-0x0000000000656000-memory.dmp

Filesize
24KB

Download
memory/4604-3-0x00000000007C0000-0x00000000007C6000-memory.dmp

Filesize
24KB

Download
memory/4604-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download