39dfcbad456f2094c62a86e6dc17de0a03eee27b93878df56fdfc8f16b36be16

Analysis

max time kernel
149s
max time network
154s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
26/01/2024, 11:40

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General

Target

2024-01-26_ddc8f3578950467dced776d9dcacf3a4_cryptolocker.exe
Size

115KB
MD5

ddc8f3578950467dced776d9dcacf3a4
SHA1

f121d5bab3e92002b2cbf09f0083e8993f07ab82
SHA256

39dfcbad456f2094c62a86e6dc17de0a03eee27b93878df56fdfc8f16b36be16
SHA512

596ce35ff73d39bd430e5f9c8d72c5a27481a8b57514d532692da93723f2f7b78ca7ccd09f39cea3c1df5c20caadf0a346c0f86fa27ea01cb9b987b0a31b704b
SSDEEP

1536:z6QFElP6n+gKmddpMOtEvwDpj3GYQbN/PKwNgp01i:z6a+CdOOtEvwDpjcz0

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/1000-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0007000000023220-13.dat	CryptoLocker_rule2
behavioral2/memory/640-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1000-19-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/640-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral2/memory/1000-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0007000000023220-13.dat	CryptoLocker_set1
behavioral2/memory/640-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1000-19-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/640-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/1000-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x0007000000023220-13.dat	UPX
behavioral2/memory/640-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/1000-19-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/640-27-0x0000000000500000-0x0000000000510000-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-1-5-21-3336304223-2978740688-3645194410-1000\Control Panel\International\Geo\Nation	2024-01-26_ddc8f3578950467dced776d9dcacf3a4_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
640	asih.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1000-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x0007000000023220-13.dat	upx
behavioral2/memory/640-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/1000-19-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/640-27-0x0000000000500000-0x0000000000510000-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 1000 wrote to memory of 640	1000	2024-01-26_ddc8f3578950467dced776d9dcacf3a4_cryptolocker.exe	88
PID 1000 wrote to memory of 640	1000	2024-01-26_ddc8f3578950467dced776d9dcacf3a4_cryptolocker.exe	88
PID 1000 wrote to memory of 640	1000	2024-01-26_ddc8f3578950467dced776d9dcacf3a4_cryptolocker.exe	88

C:\Users\Admin\AppData\Local\Temp\2024-01-26_ddc8f3578950467dced776d9dcacf3a4_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-01-26_ddc8f3578950467dced776d9dcacf3a4_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1000
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:640

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
116KB

MD5
05851205754875d3dabbbf192c82d26e

SHA1
f227ace5774657e9645abbbe32fecd7c4a464aea

SHA256
0ca7ffd1c419e7274b833bcf7d27258174e799ce467cf06573d36192fb00d566

SHA512
b2550617c4e827bcb1f183ed4b1580da5be4b1ecad65a849ca1e826408632f19a6dc3397a5bfcb8eb8f22ddd36dd68ccb367c17ce74ada361931e96164ae68b5

Download Submit
memory/640-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/640-20-0x00000000005E0000-0x00000000005E6000-memory.dmp

Filesize
24KB

Download
memory/640-22-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/640-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1000-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1000-1-0x00000000007B0000-0x00000000007B6000-memory.dmp

Filesize
24KB

Download
memory/1000-2-0x00000000007B0000-0x00000000007B6000-memory.dmp

Filesize
24KB

Download
memory/1000-3-0x00000000021B0000-0x00000000021B6000-memory.dmp

Filesize
24KB

Download
memory/1000-19-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download