c33c4fb041bc59735c3c7ae1a050912b82afa5ed768c64284ba45c53b704c321

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
14/03/2024, 13:49

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General

Target

2024-03-14_95e94bf1c9c312c925572d32b32a5ecf_cryptolocker.exe
Size

60KB
MD5

95e94bf1c9c312c925572d32b32a5ecf
SHA1

d248a8904b21e8388c15ac58c40706d3e021b580
SHA256

c33c4fb041bc59735c3c7ae1a050912b82afa5ed768c64284ba45c53b704c321
SHA512

6f4e4b9ec76f61dfea2a95ac2bcc0d234d19b8507d53c12dd8e6f949ba61daebff7d4fd163cf4875e807663713a02df213edb224ef2fe920abcdd6056f5051e6
SSDEEP

1536:qmbhXDmjr5MOtEvwDpj5cDtKkQZQRKb614M:BbdDmjr+OtEvwDpjMP

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/4000-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000d00000002313a-13.dat	CryptoLocker_rule2
behavioral2/memory/4000-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4448-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 2 IoCs

resource	yara_rule
behavioral2/memory/4000-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4448-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/4000-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000d00000002313a-13.dat	UPX
behavioral2/memory/4000-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4448-26-0x0000000000500000-0x0000000000510000-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-1-5-21-566096764-1992588923-1249862864-1000\Control Panel\International\Geo\Nation	2024-03-14_95e94bf1c9c312c925572d32b32a5ecf_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4448	asih.exe

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 4000 wrote to memory of 4448	4000	2024-03-14_95e94bf1c9c312c925572d32b32a5ecf_cryptolocker.exe	91
PID 4000 wrote to memory of 4448	4000	2024-03-14_95e94bf1c9c312c925572d32b32a5ecf_cryptolocker.exe	91
PID 4000 wrote to memory of 4448	4000	2024-03-14_95e94bf1c9c312c925572d32b32a5ecf_cryptolocker.exe	91

C:\Users\Admin\AppData\Local\Temp\2024-03-14_95e94bf1c9c312c925572d32b32a5ecf_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-14_95e94bf1c9c312c925572d32b32a5ecf_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4000
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4448

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\asih.exe

Filesize
60KB

MD5
2d3afa941c112e0570f65f01043f6f66

SHA1
a77c8670b888eb14f4b948c217dc054b0e97fa1c

SHA256
ff984bea69e9d542040dbf47f357ffd5533c26912f63d4d59b9f712964fad22c

SHA512
1a27018775cb565fada1c5d846391e4f1e38c199391476773ef1d1bfce8542ca3e00b6a3018de3e21e0c6d642209e463b602f6de87b7f916ce3da66239740b1e

Download Submit
memory/4000-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4000-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/4000-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/4000-3-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/4000-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4448-19-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/4448-23-0x00000000004C0000-0x00000000004C6000-memory.dmp

Filesize
24KB

Download
memory/4448-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download