b64b2b72601a375bf061ea23e7cc2597d09ace1a07d728a950f54b5d414ddb3a

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240419-en
resource tags

arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
submitted
02/05/2024, 14:47

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General

Target

2024-05-02_c9b4ec3a17f5aabd55a24955f6108027_cryptolocker.exe
Size

64KB
MD5

c9b4ec3a17f5aabd55a24955f6108027
SHA1

3d1ee7a107cd3e629fb9b4736549d879dc8009e5
SHA256

b64b2b72601a375bf061ea23e7cc2597d09ace1a07d728a950f54b5d414ddb3a
SHA512

d96a1bc749d22a7ed534cbf178973c63eda0793605263aa173dcf1ae19dfc069cad8189264e8006ce86bae58755a924ad2ff5ab7d5c8194ef3820e4e1a669a7e
SSDEEP

1536:P8mnK6QFElP6n+gymddpMOtEvwDpjY6UAXk:1nK6a+qdOOtEvwDpjk

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/3676-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000c000000023b66-13.dat	CryptoLocker_rule2
behavioral2/memory/3676-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2992-18-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2992-27-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral2/memory/3676-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000c000000023b66-13.dat	CryptoLocker_set1
behavioral2/memory/3676-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/memory/2992-18-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/memory/2992-27-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/3676-0-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/files/0x000c000000023b66-13.dat	UPX
behavioral2/memory/3676-17-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/memory/2992-18-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/memory/2992-27-0x0000000000500000-0x000000000050F311-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-1-5-21-17203666-93769886-2545153620-1000\Control Panel\International\Geo\Nation	2024-05-02_c9b4ec3a17f5aabd55a24955f6108027_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2992	asih.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3676-0-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/files/0x000c000000023b66-13.dat	upx
behavioral2/memory/3676-17-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/memory/2992-18-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/memory/2992-27-0x0000000000500000-0x000000000050F311-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 3676 wrote to memory of 2992	3676	2024-05-02_c9b4ec3a17f5aabd55a24955f6108027_cryptolocker.exe	83
PID 3676 wrote to memory of 2992	3676	2024-05-02_c9b4ec3a17f5aabd55a24955f6108027_cryptolocker.exe	83
PID 3676 wrote to memory of 2992	3676	2024-05-02_c9b4ec3a17f5aabd55a24955f6108027_cryptolocker.exe	83

C:\Users\Admin\AppData\Local\Temp\2024-05-02_c9b4ec3a17f5aabd55a24955f6108027_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-02_c9b4ec3a17f5aabd55a24955f6108027_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3676
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2992

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
65KB

MD5
f99966faa879946b9a0befa3a5153859

SHA1
548bbf97881d56680df2f6676445ce6915dda99a

SHA256
1cdcfa8d916d6e054c71b87b767245e018b7ca7669e2cea6f488114dba0dad6d

SHA512
4b0e12f268d30923991d003547bde14cb5f3d1cbba5b600ba381b4fc33f42c8a295f047dc6629c88684a4382c14cc0916aa34ececa790c8ce04a0156a6524062

Download Submit
memory/2992-18-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/2992-20-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/2992-26-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/2992-27-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/3676-0-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/3676-1-0x0000000002050000-0x0000000002056000-memory.dmp

Filesize
24KB

Download
memory/3676-2-0x0000000002080000-0x0000000002086000-memory.dmp

Filesize
24KB

Download
memory/3676-9-0x0000000002050000-0x0000000002056000-memory.dmp

Filesize
24KB

Download
memory/3676-17-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download