ce3a38d2f2acd97ca277f95d595b095a1fd9255a925bd07e8fce9dec96d35c70

Analysis

max time kernel
181s
max time network
189s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
28/02/2024, 20:26

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General

Target

2024-02-28_0f31a4c7325bf3d0f69e963646f250be_cryptolocker.exe
Size

47KB
MD5

0f31a4c7325bf3d0f69e963646f250be
SHA1

975185ec71c9dc12dc2ca1019940d5d2704bb52c
SHA256

ce3a38d2f2acd97ca277f95d595b095a1fd9255a925bd07e8fce9dec96d35c70
SHA512

1c20eab3ac7ea3d279d24d17b80c7d175917c8ffdc5e87c5b8636e3b944bfdb69751961be7d8c1ca4a92749ebfd2362e98fa81aad260673cd7d17afce23465b3
SSDEEP

768:qmOKYQDf5XdrDmjr5tOOtEvwDpjAajFEitQbDmoSQCVUBJUkQqAHBIG05W2Mo2pZ:qmbhXDmjr5MOtEvwDpj5cDtKkQZQE

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/116-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000800000002320d-13.dat	CryptoLocker_rule2
behavioral2/memory/116-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/860-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 2 IoCs

resource	yara_rule
behavioral2/memory/116-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/860-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/116-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000800000002320d-13.dat	UPX
behavioral2/memory/116-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/860-26-0x0000000000500000-0x0000000000510000-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-1-5-21-3045580317-3728985860-206385570-1000\Control Panel\International\Geo\Nation	2024-02-28_0f31a4c7325bf3d0f69e963646f250be_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
860	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 116 wrote to memory of 860	116	2024-02-28_0f31a4c7325bf3d0f69e963646f250be_cryptolocker.exe	91
PID 116 wrote to memory of 860	116	2024-02-28_0f31a4c7325bf3d0f69e963646f250be_cryptolocker.exe	91
PID 116 wrote to memory of 860	116	2024-02-28_0f31a4c7325bf3d0f69e963646f250be_cryptolocker.exe	91

C:\Users\Admin\AppData\Local\Temp\2024-02-28_0f31a4c7325bf3d0f69e963646f250be_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-28_0f31a4c7325bf3d0f69e963646f250be_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:116
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:860

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
47KB

MD5
28428f784d9eba7a3473cf98a8f0570f

SHA1
6d4761e380d5eb11c3322c329b72576502632239

SHA256
8f7c5c45f99761fedce86dfe62ca3e12c30748b8034888cd5cca8f3dd36d8835

SHA512
da179c0403ca28e19e667e4777e5a16d478223df98ffab0198d0f17b192ace686e8a90705a718474be5c3b85928bc999477ba12fbe98d59af05407d973475f5b

Download Submit
memory/116-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/116-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/116-2-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/116-3-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download
memory/116-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/860-19-0x00000000006D0000-0x00000000006D6000-memory.dmp

Filesize
24KB

Download
memory/860-22-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/860-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download