ab7371038ed12908ba35e0134867b9c6fef39e2457fdd2de4bf104a4acf95faf

Analysis

max time kernel
132s
max time network
139s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
14/09/2024, 03:34

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General

Target

2024-09-14_44fccfc4a1a321b81be928367b7d9dc8_cryptolocker.exe
Size

55KB
MD5

44fccfc4a1a321b81be928367b7d9dc8
SHA1

677825250dfcde519cb5e44fd10791ae49b6740b
SHA256

ab7371038ed12908ba35e0134867b9c6fef39e2457fdd2de4bf104a4acf95faf
SHA512

b179e64340da67b4bb34277eee89b12e81ea5ae29711dbd3a8399d1952f9ce5b0f4b71202d092bc4d73b79542f46f8d312b032da17b2df8c638dbe62e3bbdde4
SSDEEP

768:bco/2n1TCraU6GD1P2wZEjbhxnbcuyD7U9kXDn62tH/1/LpPFP4CK:b7/y28wZEjbnouy8G76iH/NLp+/

Score

7^/10

discovery upx

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
1660	rewok.exe

Loads dropped DLL 1 IoCs

pid	Process
2552	2024-09-14_44fccfc4a1a321b81be928367b7d9dc8_cryptolocker.exe

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2552-0-0x0000000000400000-0x000000000040E000-memory.dmp	upx
behavioral1/files/0x0007000000012119-11.dat	upx
behavioral1/memory/1660-26-0x0000000000400000-0x000000000040E000-memory.dmp	upx

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2024-09-14_44fccfc4a1a321b81be928367b7d9dc8_cryptolocker.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rewok.exe

Suspicious use of UnmapMainImage 2 IoCs

pid	Process
2552	2024-09-14_44fccfc4a1a321b81be928367b7d9dc8_cryptolocker.exe
1660	rewok.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2552 wrote to memory of 1660	2552	2024-09-14_44fccfc4a1a321b81be928367b7d9dc8_cryptolocker.exe	30
PID 2552 wrote to memory of 1660	2552	2024-09-14_44fccfc4a1a321b81be928367b7d9dc8_cryptolocker.exe	30
PID 2552 wrote to memory of 1660	2552	2024-09-14_44fccfc4a1a321b81be928367b7d9dc8_cryptolocker.exe	30
PID 2552 wrote to memory of 1660	2552	2024-09-14_44fccfc4a1a321b81be928367b7d9dc8_cryptolocker.exe	30

C:\Users\Admin\AppData\Local\Temp\2024-09-14_44fccfc4a1a321b81be928367b7d9dc8_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-09-14_44fccfc4a1a321b81be928367b7d9dc8_cryptolocker.exe"
1⤵
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:2552
- C:\Users\Admin\AppData\Local\Temp\rewok.exe
  "C:\Users\Admin\AppData\Local\Temp\rewok.exe"
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious use of UnmapMainImage
  PID:1660

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
55KB

MD5
5aa782e3a2e183013ddcae5b91ed0905

SHA1
02a90d81c2db74e0378a6426e05d01dfc9e731a4

SHA256
2d52427d55aab1eb075e032f044dbb44acf287d36399710585c7f41c6ddac8ec

SHA512
935bbb5d27f7c897fe72a81b78d687cc5070fab9c274290ebdd5bfc2ceafbd472c5de991c2b38501d4a11839f422b6f98d3267089039c7328bf1a8c592bcde84

Download Submit
memory/1660-18-0x00000000003E0000-0x00000000003E6000-memory.dmp

Filesize
24KB

Download
memory/1660-26-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/2552-0-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/2552-1-0x0000000000280000-0x0000000000286000-memory.dmp

Filesize
24KB

Download
memory/2552-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/2552-9-0x0000000000280000-0x0000000000286000-memory.dmp

Filesize
24KB

Download
memory/2552-13-0x00000000031A0000-0x00000000031AE000-memory.dmp

Filesize
56KB

Download