21349d5e2ca70ae6240052bec09b7ae3b6cd67f9b4a77f4219cd00dff84b4bf6

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
26-01-2024 19:25

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General

Target

2024-01-26_2ac74525fcfc10d21511eadced472f9f_cryptolocker.exe
Size

86KB
MD5

2ac74525fcfc10d21511eadced472f9f
SHA1

48c77afda8ee1efdb84974b5bdffa4ca0a44a423
SHA256

21349d5e2ca70ae6240052bec09b7ae3b6cd67f9b4a77f4219cd00dff84b4bf6
SHA512

1c710742b1cabde87fe4fe5e7945651c97ac05019fc7e6c1a13e99a10e0dc574c307af63f9f87143e9585862f6e0ec9361e7458c4ed7096da51816003b2242c1
SSDEEP

1536:qkmnpomddpMOtEvwDpjJGYQbN/PKwMghJOO:AnBdOOtEvwDpj6zj

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/468-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000700000002321f-13.dat	CryptoLocker_rule2
behavioral2/memory/468-16-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1616-25-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/468-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000700000002321f-13.dat	CryptoLocker_set1
behavioral2/memory/468-16-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1616-25-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/468-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/files/0x000700000002321f-13.dat	UPX
behavioral2/memory/468-16-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/1616-25-0x0000000000500000-0x000000000050F000-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-1-5-21-768304381-2824894965-3840216961-1000\Control Panel\International\Geo\Nation	2024-01-26_2ac74525fcfc10d21511eadced472f9f_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1616	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/468-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/files/0x000700000002321f-13.dat	upx
behavioral2/memory/468-16-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/1616-25-0x0000000000500000-0x000000000050F000-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 468 wrote to memory of 1616	468	2024-01-26_2ac74525fcfc10d21511eadced472f9f_cryptolocker.exe	90
PID 468 wrote to memory of 1616	468	2024-01-26_2ac74525fcfc10d21511eadced472f9f_cryptolocker.exe	90
PID 468 wrote to memory of 1616	468	2024-01-26_2ac74525fcfc10d21511eadced472f9f_cryptolocker.exe	90

C:\Users\Admin\AppData\Local\Temp\2024-01-26_2ac74525fcfc10d21511eadced472f9f_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-01-26_2ac74525fcfc10d21511eadced472f9f_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:468
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1616

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
86KB

MD5
3c4ff8a05698fb1af4be2ad2d32a9db6

SHA1
4420883b592c4bb9cd1348066b37501e13f7b610

SHA256
00bf4cf3fdf565ad395fffb18bd464d48acc9601c7faff0ea2e1e04df4d8bbd0

SHA512
5c29f13de3efe06d8e6e17951ad86a02e9c5cf340ea23134a5d3dca052bda88d3f449ae4d1161e010a675dae9df98718cf760e58452042fb76c142d512ea2011

Download Submit
memory/468-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/468-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/468-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/468-3-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/468-16-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/1616-19-0x0000000002000000-0x0000000002006000-memory.dmp

Filesize
24KB

Download
memory/1616-25-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download