337693c33da7eec0b97a6d335a7fd23a0eecf48c06cd1f2e98867a2c6b914c9b

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20231222-en
resource tags

arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system
submitted
23/01/2024, 17:45

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General

Target

2024-01-23_28a6474a9964657fb8c736cfd198b262_cryptolocker.exe
Size

80KB
MD5

28a6474a9964657fb8c736cfd198b262
SHA1

3e36ee0a3686f2209ecf52248e9cae9f6c0ecb71
SHA256

337693c33da7eec0b97a6d335a7fd23a0eecf48c06cd1f2e98867a2c6b914c9b
SHA512

28740aa1aadd7da75b15c50faf0bab78ce75e6fce9099669cf00fedc5c01a8470d62f0e385bd7e27c07f925a11873ed758eb91b042c493d24cbc6ba3483af755
SSDEEP

1536:T6QFElP6n+gxmddpMOtEvwDpjwaxTNUOAkXtBdeSx:T6a+rdOOtEvwDpjNtV

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/1300-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x00070000000231f3-13.dat	CryptoLocker_rule2
behavioral2/memory/1300-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1192-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/1300-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x00070000000231f3-13.dat	CryptoLocker_set1
behavioral2/memory/1300-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1192-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/1300-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x00070000000231f3-13.dat	UPX
behavioral2/memory/1300-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/1192-26-0x0000000000500000-0x0000000000510000-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-1-5-21-1168293393-3419776239-306423207-1000\Control Panel\International\Geo\Nation	2024-01-23_28a6474a9964657fb8c736cfd198b262_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1192	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1300-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x00070000000231f3-13.dat	upx
behavioral2/memory/1300-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/1192-26-0x0000000000500000-0x0000000000510000-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

description	pid	Process	procid_target
PID 1300 wrote to memory of 1192	1300	2024-01-23_28a6474a9964657fb8c736cfd198b262_cryptolocker.exe	88
PID 1300 wrote to memory of 1192	1300	2024-01-23_28a6474a9964657fb8c736cfd198b262_cryptolocker.exe	88
PID 1300 wrote to memory of 1192	1300	2024-01-23_28a6474a9964657fb8c736cfd198b262_cryptolocker.exe	88

C:\Users\Admin\AppData\Local\Temp\2024-01-23_28a6474a9964657fb8c736cfd198b262_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-01-23_28a6474a9964657fb8c736cfd198b262_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1300
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1192

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
81KB

MD5
54086ffc4e2908869671a478578e0f3a

SHA1
277b42c36f21a7579814434aeedf27bbee10eac1

SHA256
85cde7e3e59096506c276455991539fee63337fcc5e59bc0414283ba5872c70e

SHA512
315419940802a2a48c32f81fd959e6288c305f75b9c20f708288cbd3e9fa218f568a438a485b97bf7f1488a83a8c4da04f3d430fa2e65721b6183b5e233bc302

Download Submit
memory/1192-19-0x00000000005C0000-0x00000000005C6000-memory.dmp

Filesize
24KB

Download
memory/1192-25-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/1192-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1300-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1300-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/1300-2-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/1300-3-0x00000000021B0000-0x00000000021B6000-memory.dmp

Filesize
24KB

Download
memory/1300-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download