31f21cbfc96fe4c07adadca37f56913b06592fc77a7259cc8074e93a07c3d4ea

Analysis

max time kernel
149s
max time network
154s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
22-05-2024 19:21

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General

Target

20240521dc4bfa3bae8b7bc3baf76079bf453d40cryptolocker.exe
Size

80KB
MD5

dc4bfa3bae8b7bc3baf76079bf453d40
SHA1

277205b1515b4e2867fe984d5f4fe0965984b005
SHA256

31f21cbfc96fe4c07adadca37f56913b06592fc77a7259cc8074e93a07c3d4ea
SHA512

3f24fd9ca911ba74d493698df642fc7daf3daa207546d269b539baf20f41edbc92c36579449721c3b80c0c3255119b7e7a1139a416c7a289383743d3a5988206
SSDEEP

1536:T6QFElP6n+gxmddpMOtEvwDpjwaxTNUOA+YSafiPuqi:T6a+rdOOtEvwDpjNcN

Score

7^/10

upx

Malware Config

Signatures

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

1740 asih.exe
Loads dropped DLL 1 IoCs

Processes:

20240521dc4bfa3bae8b7bc3baf76079bf453d40cryptolocker.exe

pid process

2032 20240521dc4bfa3bae8b7bc3baf76079bf453d40cryptolocker.exe

pid	process
1740	asih.exe

pid	process
2032	20240521dc4bfa3bae8b7bc3baf76079bf453d40cryptolocker.exe

UPX packed file 6 IoCs

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

upx

Processes:

resource	yara_rule
behavioral1/memory/2032-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral1/memory/2032-12-0x00000000004E0000-0x00000000004F0000-memory.dmp	upx
behavioral1/memory/1740-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2032-15-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/1740-27-0x0000000000500000-0x0000000000510000-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 4 IoCs

Processes:

20240521dc4bfa3bae8b7bc3baf76079bf453d40cryptolocker.exe

description	pid	process	target process
PID 2032 wrote to memory of 1740	2032	20240521dc4bfa3bae8b7bc3baf76079bf453d40cryptolocker.exe	asih.exe
PID 2032 wrote to memory of 1740	2032	20240521dc4bfa3bae8b7bc3baf76079bf453d40cryptolocker.exe	asih.exe
PID 2032 wrote to memory of 1740	2032	20240521dc4bfa3bae8b7bc3baf76079bf453d40cryptolocker.exe	asih.exe
PID 2032 wrote to memory of 1740	2032	20240521dc4bfa3bae8b7bc3baf76079bf453d40cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\20240521dc4bfa3bae8b7bc3baf76079bf453d40cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\20240521dc4bfa3bae8b7bc3baf76079bf453d40cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2032
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1740

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

\Users\Admin\AppData\Local\Temp\asih.exe

Filesize
80KB

MD5
05a98069cd633f1f76e693e0ac3ba361

SHA1
afb578ea89d6f89f493c67c924b1969a2ef66fc9

SHA256
07d7079164f5048f47cb8cb870ec296fead216874bd9edbd536ff03e255f1fde

SHA512
65a7c88790c5d15baffa58d17a073f063107e9dbcaa62095804e6fbf23eefb16b844ea88c2a69565db317668d9b01052573caf46bab0eae2b02c2363145082cd

Download Submit
memory/1740-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1740-19-0x0000000000280000-0x0000000000286000-memory.dmp

Filesize
24KB

Download
memory/1740-26-0x00000000001D0000-0x00000000001D6000-memory.dmp

Filesize
24KB

Download
memory/1740-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2032-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2032-1-0x00000000002B0000-0x00000000002B6000-memory.dmp

Filesize
24KB

Download
memory/2032-2-0x00000000002E0000-0x00000000002E6000-memory.dmp

Filesize
24KB

Download
memory/2032-9-0x00000000002B0000-0x00000000002B6000-memory.dmp

Filesize
24KB

Download
memory/2032-12-0x00000000004E0000-0x00000000004F0000-memory.dmp

Filesize
64KB

Download
memory/2032-15-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download