afb7545cd4d174f830cf1b4ec248feecbad2fd855386fd4494bf22ccc0e8b0f5

Analysis

max time kernel
148s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240412-en
resource tags

arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
submitted
19/04/2024, 07:39

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General

Target

2024-04-19_b9b14909be833659df678c64a37e0b17_cryptolocker.exe
Size

96KB
MD5

b9b14909be833659df678c64a37e0b17
SHA1

58a76e0890b0f4ae39307b015f756215d453bd94
SHA256

afb7545cd4d174f830cf1b4ec248feecbad2fd855386fd4494bf22ccc0e8b0f5
SHA512

771bbdf0cbce6740706d8278c18c5ffa54981e71de1322028a041b21db338394c3acd2fe55ae2f1084e5250a3f2c98f58de21987511090abac3ede01ca5d0cdb
SSDEEP

1536:zj+soPSMOtEvwDpj4ktBl01hJl8QAPM8Ho6cRDjgx/bS:zCsanOtEvwDpjB+

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/4024-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x001c00000001e97e-13.dat	CryptoLocker_rule2
behavioral2/memory/4024-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2464-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/4024-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x001c00000001e97e-13.dat	CryptoLocker_set1
behavioral2/memory/4024-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2464-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/4024-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x001c00000001e97e-13.dat	UPX
behavioral2/memory/4024-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/2464-26-0x0000000000500000-0x0000000000510000-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-1-5-21-259785868-298165991-4178590326-1000\Control Panel\International\Geo\Nation	2024-04-19_b9b14909be833659df678c64a37e0b17_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2464	misid.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4024-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x001c00000001e97e-13.dat	upx
behavioral2/memory/4024-18-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/2464-26-0x0000000000500000-0x0000000000510000-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 4024 wrote to memory of 2464	4024	2024-04-19_b9b14909be833659df678c64a37e0b17_cryptolocker.exe	85
PID 4024 wrote to memory of 2464	4024	2024-04-19_b9b14909be833659df678c64a37e0b17_cryptolocker.exe	85
PID 4024 wrote to memory of 2464	4024	2024-04-19_b9b14909be833659df678c64a37e0b17_cryptolocker.exe	85

C:\Users\Admin\AppData\Local\Temp\2024-04-19_b9b14909be833659df678c64a37e0b17_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-19_b9b14909be833659df678c64a37e0b17_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4024
- C:\Users\Admin\AppData\Local\Temp\misid.exe
  "C:\Users\Admin\AppData\Local\Temp\misid.exe"
  2⤵
  - Executes dropped EXE
  PID:2464

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
96KB

MD5
f27b7a1f420b3fcd0209c26db33be431

SHA1
f207e13c0c0a4d2b7f7e89481cd11d7b3534a867

SHA256
34664888d9e17938075008a9b11448c54d110be1d23bc728f2e96d4ab8dcd9d9

SHA512
75a384cd99531309d2d395d5252298d1526cdd4ee7913de1811fb6dd6e683483a214739761ed0777c33a723cd6cc80c0ed36b564e89cc77f015c884d0a6f2c05

Download Submit
memory/2464-19-0x00000000020E0000-0x00000000020E6000-memory.dmp

Filesize
24KB

Download
memory/2464-24-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/2464-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4024-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4024-1-0x00000000020C0000-0x00000000020C6000-memory.dmp

Filesize
24KB

Download
memory/4024-2-0x00000000020C0000-0x00000000020C6000-memory.dmp

Filesize
24KB

Download
memory/4024-3-0x00000000020F0000-0x00000000020F6000-memory.dmp

Filesize
24KB

Download
memory/4024-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download