ee8a26d3cf4927ecdb9dc74a57b2a67cc7a1bc306fd73d7dd5bba09a910ed139

Analysis

max time kernel
150s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
22-05-2024 18:51

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General

Target

20240521bf838e8ca2f12d922652714032ac8fb0cryptolocker.exe
Size

95KB
MD5

bf838e8ca2f12d922652714032ac8fb0
SHA1

3e022a2ecb674f02644b73e7d0b876399bee7e71
SHA256

ee8a26d3cf4927ecdb9dc74a57b2a67cc7a1bc306fd73d7dd5bba09a910ed139
SHA512

6d5bd5244f3d7046838b16a82212a9d6fe1543c0586f000749318c2c3b2ef9274942c0d71fef8e3739386b92c45a5abb7c3c3ac73f9a1e218f4c565caac28982
SSDEEP

1536:qkmnpomddpMOtEvwDpjJGYQbN/PKwNgp0+h:AnBdOOtEvwDpj6zG

Score

7^/10

upx

Malware Config

Signatures

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:

20240521bf838e8ca2f12d922652714032ac8fb0cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-711569230-3659488422-571408806-1000\Control Panel\International\Geo\Nation	20240521bf838e8ca2f12d922652714032ac8fb0cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

1244 asih.exe

pid	process
1244	asih.exe

UPX packed file 5 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/4036-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral2/memory/1244-16-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/4036-18-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/1244-27-0x0000000000500000-0x000000000050F000-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

Processes:

20240521bf838e8ca2f12d922652714032ac8fb0cryptolocker.exe

description	pid	process	target process
PID 4036 wrote to memory of 1244	4036	20240521bf838e8ca2f12d922652714032ac8fb0cryptolocker.exe	asih.exe
PID 4036 wrote to memory of 1244	4036	20240521bf838e8ca2f12d922652714032ac8fb0cryptolocker.exe	asih.exe
PID 4036 wrote to memory of 1244	4036	20240521bf838e8ca2f12d922652714032ac8fb0cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\20240521bf838e8ca2f12d922652714032ac8fb0cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\20240521bf838e8ca2f12d922652714032ac8fb0cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4036

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:1244

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\asih.exe
Filesize
95KB

MD5
fdb7fb998e8efbfa10b7916dfffcf378

SHA1
a2597e8be424f5ce205a50facfdead0ccda88a41

SHA256
6f343d08c87ad7f273aa7f67a97198d6b0fa491bd14e1205c1977308a1bb3f8e

SHA512
9139a7e609f3ad047ec6430aefef85c8a7e34833274d22c459bc7718156f38bd39eb2e6d0865d36487b25be37354a3a7834c3559f3dae92bc676e2f116419cb7

Download Submit
memory/1244-16-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/1244-26-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/1244-27-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/4036-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/4036-1-0x0000000000620000-0x0000000000626000-memory.dmp

Filesize
24KB

Download
memory/4036-2-0x0000000000750000-0x0000000000756000-memory.dmp

Filesize
24KB

Download
memory/4036-9-0x0000000000620000-0x0000000000626000-memory.dmp

Filesize
24KB

Download
memory/4036-18-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download