df52b85187aac34c21e964818ca10d4c27d071e4339922ca325363764229a4d8

Analysis

max time kernel
150s
max time network
156s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
29/01/2024, 11:26

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General

Target

2024-01-29_1d4ebb9e1587421a497d7297b840cd35_cryptolocker.exe
Size

77KB
MD5

1d4ebb9e1587421a497d7297b840cd35
SHA1

556cf245f834403206f5b7b6db0b4a33df98b2be
SHA256

df52b85187aac34c21e964818ca10d4c27d071e4339922ca325363764229a4d8
SHA512

8f9666dc19d8899d45bce5d8341e34fa93a013c3df42a092876dd7cac45c3fd59a7a049fda845fbbc273dc623dab31362906216ce64fd39c96063a87a991d966
SSDEEP

1536:T6QFElP6n+gxmddpMOtEvwDpjwaxTNUOA+YSP75:T6a+rdOOtEvwDpjNb

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/3776-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0007000000023210-13.dat	CryptoLocker_rule2
behavioral2/memory/5032-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3776-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/5032-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral2/memory/3776-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0007000000023210-13.dat	CryptoLocker_set1
behavioral2/memory/5032-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3776-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/5032-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/3776-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x0007000000023210-13.dat	UPX
behavioral2/memory/5032-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/3776-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/5032-27-0x0000000000500000-0x0000000000510000-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-1-5-21-983843758-932321429-1636175382-1000\Control Panel\International\Geo\Nation	2024-01-29_1d4ebb9e1587421a497d7297b840cd35_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
5032	asih.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3776-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x0007000000023210-13.dat	upx
behavioral2/memory/5032-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/3776-18-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/5032-27-0x0000000000500000-0x0000000000510000-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 3776 wrote to memory of 5032	3776	2024-01-29_1d4ebb9e1587421a497d7297b840cd35_cryptolocker.exe	83
PID 3776 wrote to memory of 5032	3776	2024-01-29_1d4ebb9e1587421a497d7297b840cd35_cryptolocker.exe	83
PID 3776 wrote to memory of 5032	3776	2024-01-29_1d4ebb9e1587421a497d7297b840cd35_cryptolocker.exe	83

C:\Users\Admin\AppData\Local\Temp\2024-01-29_1d4ebb9e1587421a497d7297b840cd35_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-01-29_1d4ebb9e1587421a497d7297b840cd35_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3776
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:5032

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
77KB

MD5
2ba6e1106f8ceff8dca4bf8afdeea973

SHA1
0987073ddea8303b9fdf1538f4603579d489577f

SHA256
d73a347b0e45a715f920ce091bb787b7480d62636fede19c964f9e492b69f1a4

SHA512
2208794a0f67b3ec89265aa09f1b45cabe3fc0425bdfec2efc3485396d83f3a89a16e9ebee7fc3d94342b7e1444a0232371a5920cf55a010156d9a42f149feaf

Download Submit
memory/3776-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3776-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/3776-2-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/3776-3-0x0000000002100000-0x0000000002106000-memory.dmp

Filesize
24KB

Download
memory/3776-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/5032-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/5032-22-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/5032-20-0x00000000005E0000-0x00000000005E6000-memory.dmp

Filesize
24KB

Download
memory/5032-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download