6bc015310c25ba972716efa16a300932ff3e939ba9d6e17901c3fde1778b74da

Analysis

max time kernel
148s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
22-05-2024 22:23

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General

Target

2024-05-22_0ac5e7401b4b5804ca4dec7b09156f68_cryptolocker.exe
Size

52KB
MD5

0ac5e7401b4b5804ca4dec7b09156f68
SHA1

73b755cc14fa0f10fe20e940141a18387e48f52c
SHA256

6bc015310c25ba972716efa16a300932ff3e939ba9d6e17901c3fde1778b74da
SHA512

4f3b3236e383311682f460bdd8d3633f0dd27911473eeadb990f342875a3b0b12d1448994a6e725223c77abf2efe03adeb74e7defa8ad1a066dc97e2ca66495b
SSDEEP

768:z6LsoEEeegiZPvEhHSG+gzum/kLyMro2GtOOtEvwDpj/YY1J+OTO8:z6QFElP6n+gKmddpMOtEvwDpj31i8

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/1620-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral2/memory/1620-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3116-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/1620-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral2/memory/1620-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3116-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/1620-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral2/memory/1620-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/3116-26-0x0000000000500000-0x0000000000510000-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

Processes:

2024-05-22_0ac5e7401b4b5804ca4dec7b09156f68_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation	2024-05-22_0ac5e7401b4b5804ca4dec7b09156f68_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

3116 asih.exe

pid	process
3116	asih.exe

UPX packed file 4 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/1620-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral2/memory/1620-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/3116-26-0x0000000000500000-0x0000000000510000-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

Processes:

2024-05-22_0ac5e7401b4b5804ca4dec7b09156f68_cryptolocker.exe

description	pid	process	target process
PID 1620 wrote to memory of 3116	1620	2024-05-22_0ac5e7401b4b5804ca4dec7b09156f68_cryptolocker.exe	asih.exe
PID 1620 wrote to memory of 3116	1620	2024-05-22_0ac5e7401b4b5804ca4dec7b09156f68_cryptolocker.exe	asih.exe
PID 1620 wrote to memory of 3116	1620	2024-05-22_0ac5e7401b4b5804ca4dec7b09156f68_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-22_0ac5e7401b4b5804ca4dec7b09156f68_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-22_0ac5e7401b4b5804ca4dec7b09156f68_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1620
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3116

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
53KB

MD5
acdcb32f38c807b32fd1ace4211a2764

SHA1
63c4e5140412b2941f5e99410adacf92b7603093

SHA256
a587dcc825b11483c471758802c83253103c9564e37985dcff79df11d99beb5d

SHA512
41dc0a18c92720116a2164ec7dcfbe3dce980243ca160cff52c47df103b48598a9132ec3ae834c28eac3e32cc4e9bf6930847af69c19490cf87f6014c436a51a

Download Submit
memory/1620-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1620-1-0x00000000006B0000-0x00000000006B6000-memory.dmp

Filesize
24KB

Download
memory/1620-2-0x00000000006D0000-0x00000000006D6000-memory.dmp

Filesize
24KB

Download
memory/1620-9-0x00000000006B0000-0x00000000006B6000-memory.dmp

Filesize
24KB

Download
memory/1620-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3116-19-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/3116-25-0x0000000000580000-0x0000000000586000-memory.dmp

Filesize
24KB

Download
memory/3116-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download