13973e2be0369b77239771e69357c689098fdd9345383619e690444b0092dde3

Analysis

max time kernel
130s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
19/02/2024, 20:33

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General

Target

2024-02-19_74f56061a4c2ae9627f1cdacc736791d_cryptolocker.exe
Size

63KB
MD5

74f56061a4c2ae9627f1cdacc736791d
SHA1

fd5a69d6db1d7553eadce9bd03f9726736903235
SHA256

13973e2be0369b77239771e69357c689098fdd9345383619e690444b0092dde3
SHA512

24a81d62482086f7ac5a282562231971d475032f69e1f5a4d01baf06b733687e5d32235d5f6a86a33b2693e0c737440cd94419edf15ff3abd64a1f8caf169d86
SSDEEP

768:T6LsoEEeegiZPvEhHSG+gkum/kLyMro2GtOOtEvwDpjhXMLamkc8J5hRXTem:T6QFElP6n+gxmddpMOtEvwDpjwa3nTX

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/2472-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0006000000023203-13.dat	CryptoLocker_rule2
behavioral2/memory/3100-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2472-19-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3100-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral2/memory/2472-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0006000000023203-13.dat	CryptoLocker_set1
behavioral2/memory/3100-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2472-19-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3100-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/2472-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x0006000000023203-13.dat	UPX
behavioral2/memory/3100-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/2472-19-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/3100-27-0x0000000000500000-0x0000000000510000-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-1-5-21-996941297-2279405024-2328152752-1000\Control Panel\International\Geo\Nation	2024-02-19_74f56061a4c2ae9627f1cdacc736791d_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3100	asih.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2472-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x0006000000023203-13.dat	upx
behavioral2/memory/3100-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/2472-19-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/3100-27-0x0000000000500000-0x0000000000510000-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 2472 wrote to memory of 3100	2472	2024-02-19_74f56061a4c2ae9627f1cdacc736791d_cryptolocker.exe	84
PID 2472 wrote to memory of 3100	2472	2024-02-19_74f56061a4c2ae9627f1cdacc736791d_cryptolocker.exe	84
PID 2472 wrote to memory of 3100	2472	2024-02-19_74f56061a4c2ae9627f1cdacc736791d_cryptolocker.exe	84

C:\Users\Admin\AppData\Local\Temp\2024-02-19_74f56061a4c2ae9627f1cdacc736791d_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-19_74f56061a4c2ae9627f1cdacc736791d_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2472
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3100

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
63KB

MD5
5104bd0736ca8dceb7fabf3a97a7f5b0

SHA1
13056c123a0a350b45e27be8b6635b5cbd755d73

SHA256
016b964f5024325993dfdde16be0e48548834d50ce6d7af265d8154d60911c67

SHA512
5e4639abaf2b9e224135a0f7d24bb8e72b50dac3bb3634e3697f9a1f2996852aa1ab3a54037281805aa771d642d640a0b3f01587e658c0d730d0a60c5e97abf9

Download Submit
memory/2472-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2472-1-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/2472-2-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/2472-3-0x00000000005C0000-0x00000000005C6000-memory.dmp

Filesize
24KB

Download
memory/2472-19-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3100-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3100-20-0x00000000020F0000-0x00000000020F6000-memory.dmp

Filesize
24KB

Download
memory/3100-25-0x00000000007B0000-0x00000000007B6000-memory.dmp

Filesize
24KB

Download
memory/3100-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download