53839ac1eef0756e2facd6be7f36e43ae807dd50110bbaa9053a3c33b9c8f2d4

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240221-en
resource tags

arch:x64arch:x86image:win10v2004-20240221-enlocale:en-usos:windows10-2004-x64system
submitted
22-02-2024 05:42

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General

Target

2024-02-22_fceea73cad6e7325353e988b3f79daca_cryptolocker.exe
Size

101KB
MD5

fceea73cad6e7325353e988b3f79daca
SHA1

51dad2706e2f2bf67b6ee6fe96bc54f1bf333701
SHA256

53839ac1eef0756e2facd6be7f36e43ae807dd50110bbaa9053a3c33b9c8f2d4
SHA512

0065a896d75b5b89066cb8be20ef68a3a1b731f4141df5df2ced321f9082aecd0a3ed5b76275c94f8edc6b03887b276043800dd68db856ab0768ed6a1987f836
SSDEEP

1536:qkmnpomddpMOtEvwDpjJGYQbN/PKwNgpwqWsviy6ixV:AnBdOOtEvwDpj6zi

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/4424-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0007000000023216-13.dat	CryptoLocker_rule2
behavioral2/memory/4424-16-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3012-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/4424-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0007000000023216-13.dat	CryptoLocker_set1
behavioral2/memory/4424-16-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3012-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/4424-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/files/0x0007000000023216-13.dat	UPX
behavioral2/memory/4424-16-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/3012-26-0x0000000000500000-0x000000000050F000-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-1-5-21-3316742141-2240921845-2885234760-1000\Control Panel\International\Geo\Nation	2024-02-22_fceea73cad6e7325353e988b3f79daca_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3012	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4424-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/files/0x0007000000023216-13.dat	upx
behavioral2/memory/4424-16-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/3012-26-0x0000000000500000-0x000000000050F000-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 4424 wrote to memory of 3012	4424	2024-02-22_fceea73cad6e7325353e988b3f79daca_cryptolocker.exe	87
PID 4424 wrote to memory of 3012	4424	2024-02-22_fceea73cad6e7325353e988b3f79daca_cryptolocker.exe	87
PID 4424 wrote to memory of 3012	4424	2024-02-22_fceea73cad6e7325353e988b3f79daca_cryptolocker.exe	87

C:\Users\Admin\AppData\Local\Temp\2024-02-22_fceea73cad6e7325353e988b3f79daca_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-22_fceea73cad6e7325353e988b3f79daca_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4424
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3012

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
101KB

MD5
4dcd7647d5055c1bc859092de7af6fe0

SHA1
75171f604e9a423bac823039f489cfc52f3ba8d5

SHA256
fb717111bc35a5fd518701c2793e8fbb5fe67ed53ed5941cbaff41c5a1959317

SHA512
4a28e303d916d31136b2b37c633276c6950b3afc250c9124caf526885b753781d8fcbcd97a995f11a6161b9d77c16e7ebac6f50ba450095238ccbb584ef2376b

Download Submit
memory/3012-20-0x00000000005E0000-0x00000000005E6000-memory.dmp

Filesize
24KB

Download
memory/3012-19-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/3012-26-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/4424-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/4424-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/4424-2-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/4424-3-0x0000000000850000-0x0000000000856000-memory.dmp

Filesize
24KB

Download
memory/4424-16-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download