b97b676625a29a09018391b23b9f084ab45967f5785363c1396d4f379f7e9cf7

Analysis

max time kernel
148s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
12/02/2024, 15:43

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General

Target

2024-02-12_14a4aa0c9096bc682b16c342fe604c44_cryptolocker.exe
Size

75KB
MD5

14a4aa0c9096bc682b16c342fe604c44
SHA1

3894c0a4b62710240779066cf3d44bd51d43b242
SHA256

b97b676625a29a09018391b23b9f084ab45967f5785363c1396d4f379f7e9cf7
SHA512

769a99e4b2aca013e0d1a381f33e1d59ce7b51d0867cf8e987058c27b9b466455ba687433363eb0b7bd5ea762766b518efce57f86653084c7538aa6d66eaa57f
SSDEEP

1536:T6QFElP6n+gxmddpMOtEvwDpjwaxTNUOAkXtBdWnd:T6a+rdOOtEvwDpjNtw

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/4812-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x00080000000231e6-13.dat	CryptoLocker_rule2
behavioral2/memory/4812-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4252-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/4812-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x00080000000231e6-13.dat	CryptoLocker_set1
behavioral2/memory/4812-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4252-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/4812-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x00080000000231e6-13.dat	UPX
behavioral2/memory/4812-16-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4252-26-0x0000000000500000-0x0000000000510000-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-1-5-21-768304381-2824894965-3840216961-1000\Control Panel\International\Geo\Nation	2024-02-12_14a4aa0c9096bc682b16c342fe604c44_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4252	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4812-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x00080000000231e6-13.dat	upx
behavioral2/memory/4812-16-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/4252-26-0x0000000000500000-0x0000000000510000-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 4812 wrote to memory of 4252	4812	2024-02-12_14a4aa0c9096bc682b16c342fe604c44_cryptolocker.exe	84
PID 4812 wrote to memory of 4252	4812	2024-02-12_14a4aa0c9096bc682b16c342fe604c44_cryptolocker.exe	84
PID 4812 wrote to memory of 4252	4812	2024-02-12_14a4aa0c9096bc682b16c342fe604c44_cryptolocker.exe	84

C:\Users\Admin\AppData\Local\Temp\2024-02-12_14a4aa0c9096bc682b16c342fe604c44_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-12_14a4aa0c9096bc682b16c342fe604c44_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4812
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4252

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
75KB

MD5
da3915c901a8ff31a0d0c1ccac80ad3b

SHA1
32ae47379edf2b2b54ee348b6ccf3cff73cfc029

SHA256
686b951741da61b6dd6b9752a5ccc4d2d4494808d119a01874a6bed4fd65323f

SHA512
9b90f639a635da1e0069bc5667de95065c853aa892779e18181878531df6bb3c661a21b8c92980596a34181a7404122899247e8053387e4495d641adf9870972

Download Submit
memory/4252-21-0x00000000006B0000-0x00000000006B6000-memory.dmp

Filesize
24KB

Download
memory/4252-19-0x00000000006D0000-0x00000000006D6000-memory.dmp

Filesize
24KB

Download
memory/4252-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4812-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4812-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/4812-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/4812-3-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/4812-16-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download