835fc146477dca9e2b930b0f8c474c653d0964b46bc0eff1c5b977376c343e77

Analysis

max time kernel
148s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240221-en
resource tags

arch:x64arch:x86image:win10v2004-20240221-enlocale:en-usos:windows10-2004-x64system
submitted
23/02/2024, 11:12

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General

Target

2024-02-23_fe80da3fe6edbfe96c5309a6ea33fa79_cryptolocker.exe
Size

46KB
MD5

fe80da3fe6edbfe96c5309a6ea33fa79
SHA1

f37d36280cdff8430e3e76302da8f00544c927e5
SHA256

835fc146477dca9e2b930b0f8c474c653d0964b46bc0eff1c5b977376c343e77
SHA512

ffebc6baa9d670adf0702836c4696e3bde5749342cab67c715b0e799d8e2d03c8d64e4bc22bbd925f53bb19c3022aab3dfcbbf9d70b7bc359986db05b7203bb1
SSDEEP

768:qmOKYQDf5XdrDmjr5tOOtEvwDpjAajFEitQbDmoSQCVUBJUkQqAHBIG05W2MobA:qmbhXDmjr5MOtEvwDpj5cDtKkQZQu

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/3492-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x00c300000001e848-13.dat	CryptoLocker_rule2
behavioral2/memory/3492-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2400-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 2 IoCs

resource	yara_rule
behavioral2/memory/3492-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2400-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/3492-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x00c300000001e848-13.dat	UPX
behavioral2/memory/3492-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/2400-26-0x0000000000500000-0x0000000000510000-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-1-5-21-2132103209-3755304320-2959162027-1000\Control Panel\International\Geo\Nation	2024-02-23_fe80da3fe6edbfe96c5309a6ea33fa79_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2400	asih.exe

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 3492 wrote to memory of 2400	3492	2024-02-23_fe80da3fe6edbfe96c5309a6ea33fa79_cryptolocker.exe	89
PID 3492 wrote to memory of 2400	3492	2024-02-23_fe80da3fe6edbfe96c5309a6ea33fa79_cryptolocker.exe	89
PID 3492 wrote to memory of 2400	3492	2024-02-23_fe80da3fe6edbfe96c5309a6ea33fa79_cryptolocker.exe	89

C:\Users\Admin\AppData\Local\Temp\2024-02-23_fe80da3fe6edbfe96c5309a6ea33fa79_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-23_fe80da3fe6edbfe96c5309a6ea33fa79_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3492
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2400

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
46KB

MD5
f627d88329149f6cf32182be24004a93

SHA1
70e3ed52e49ea67e405e3e5378f5ebe5717202b2

SHA256
7271c40f463ba4d28aea5347b49f5a298059b62dc1822d2002350716dd0f7dc5

SHA512
b5bdfd68b143d1e51bb06f742b518f9296cb3b9b5a09498397803d3fdc8eab62c0386f27da0b8899144876dfe06907d4b5d1bbc931f0b57801833fe1e4a35a3f

Download Submit
memory/2400-19-0x00000000006D0000-0x00000000006D6000-memory.dmp

Filesize
24KB

Download
memory/2400-24-0x00000000006B0000-0x00000000006B6000-memory.dmp

Filesize
24KB

Download
memory/2400-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3492-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3492-1-0x0000000000730000-0x0000000000736000-memory.dmp

Filesize
24KB

Download
memory/3492-2-0x0000000000730000-0x0000000000736000-memory.dmp

Filesize
24KB

Download
memory/3492-3-0x0000000000750000-0x0000000000756000-memory.dmp

Filesize
24KB

Download
memory/3492-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download