c854ec7b619f991aea39cad4d4dd96416eccd87617785ba15cc98b9bf244948b

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
21-05-2024 16:41

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General

Target

2024-05-21_760c44d421a8307834d9abee27112618_cryptolocker.exe
Size

90KB
MD5

760c44d421a8307834d9abee27112618
SHA1

b73247aa6eb2f4df0736a9fedbf079ceacc01e02
SHA256

c854ec7b619f991aea39cad4d4dd96416eccd87617785ba15cc98b9bf244948b
SHA512

6b7e1f1a6c8457a1b6b3b7b0c14eaf87c7358e8ccda0528ffd3250511fe4876cee51652094219231e027e6c5e6302bf882c99f417c6593d31b8cfe53a669d918
SSDEEP

1536:n6QFElP6n+g9u9cvMOtEvwDpjYYTjipvF2bx1PQAHX:n6a+1SEOtEvwDpjYYvQd2P3

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2964-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral2/memory/2964-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1652-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2964-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral2/memory/2964-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1652-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2964-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral2/memory/2964-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/1652-26-0x0000000000500000-0x0000000000510000-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

Processes:

2024-05-21_760c44d421a8307834d9abee27112618_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3906287020-2915474608-1755617787-1000\Control Panel\International\Geo\Nation	2024-05-21_760c44d421a8307834d9abee27112618_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

1652 asih.exe

pid	process
1652	asih.exe

UPX packed file 4 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/2964-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral2/memory/2964-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/1652-26-0x0000000000500000-0x0000000000510000-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

Processes:

2024-05-21_760c44d421a8307834d9abee27112618_cryptolocker.exe

description	pid	process	target process
PID 2964 wrote to memory of 1652	2964	2024-05-21_760c44d421a8307834d9abee27112618_cryptolocker.exe	asih.exe
PID 2964 wrote to memory of 1652	2964	2024-05-21_760c44d421a8307834d9abee27112618_cryptolocker.exe	asih.exe
PID 2964 wrote to memory of 1652	2964	2024-05-21_760c44d421a8307834d9abee27112618_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-21_760c44d421a8307834d9abee27112618_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-21_760c44d421a8307834d9abee27112618_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2964
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1652

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
90KB

MD5
8994ccad478c5b6d9cbbafbb055c9e11

SHA1
6653ff68bc58c38e43ef609736a834ee3c6b1122

SHA256
6a5347d814a7423db1a85d4b8e6dd9ea2f045d23ea484bcdc24995a1a5b7f67c

SHA512
f4ea82e6e997eb7421d9f9fd11aaedec2a35659e2890a899251be3c29cc542e5c732d2b7cb9f73a745343e9e80532aef386665117537e12b399e1ce23abfa039

Download Submit
memory/1652-19-0x0000000002070000-0x0000000002076000-memory.dmp

Filesize
24KB

Download
memory/1652-25-0x0000000002050000-0x0000000002056000-memory.dmp

Filesize
24KB

Download
memory/1652-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2964-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2964-1-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/2964-2-0x00000000005C0000-0x00000000005C6000-memory.dmp

Filesize
24KB

Download
memory/2964-9-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/2964-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download