0e2427f3591da1e0c29159c3225289e93bd8512f3789caed4ac1efb5b757e265

Analysis

max time kernel
144s
max time network
148s
platform
windows7_x64
resource
win7-20240508-en
resource tags

arch:x64arch:x86image:win7-20240508-enlocale:en-usos:windows7-x64system
submitted
11-06-2024 03:28

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General

Target

2024-06-11_3e3cf6d3d147175679e0310d362e99b4_cryptolocker.exe
Size

33KB
MD5

3e3cf6d3d147175679e0310d362e99b4
SHA1

853a8f8a4111a6180a612d30490676224820420e
SHA256

0e2427f3591da1e0c29159c3225289e93bd8512f3789caed4ac1efb5b757e265
SHA512

0d583f3c0fb2a1d7454cf338da48551c6c8f16e978fb1b6dccfce9b1e032582b4226ab02d9ef71ad275fea6b2a5cf21380eb475b006612727d218684274aa62f
SSDEEP

768:bROjawZEjbhxnbcuyD7U9kXfn62tH/1/LpP+5:bRO2wZEjbnouy8Gv6iH/NLpU

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 3 IoCs

resource	yara_rule
behavioral1/memory/2548-0-0x0000000000400000-0x000000000040D000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000e00000001214d-11.dat	CryptoLocker_rule2
behavioral1/memory/2548-13-0x0000000002F50000-0x0000000002F5D000-memory.dmp	CryptoLocker_rule2

UPX dump on OEP (original entry point) 3 IoCs

resource	yara_rule
behavioral1/memory/2548-0-0x0000000000400000-0x000000000040D000-memory.dmp	UPX
behavioral1/files/0x000e00000001214d-11.dat	UPX
behavioral1/memory/2548-13-0x0000000002F50000-0x0000000002F5D000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
1888	rewok.exe

Loads dropped DLL 1 IoCs

pid	Process
2548	2024-06-11_3e3cf6d3d147175679e0310d362e99b4_cryptolocker.exe

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2548-0-0x0000000000400000-0x000000000040D000-memory.dmp	upx
behavioral1/files/0x000e00000001214d-11.dat	upx
behavioral1/memory/2548-13-0x0000000002F50000-0x0000000002F5D000-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 UnmapMainImage 2 IoCs

pid	Process
2548	2024-06-11_3e3cf6d3d147175679e0310d362e99b4_cryptolocker.exe
1888	rewok.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2548 wrote to memory of 1888	2548	2024-06-11_3e3cf6d3d147175679e0310d362e99b4_cryptolocker.exe	28
PID 2548 wrote to memory of 1888	2548	2024-06-11_3e3cf6d3d147175679e0310d362e99b4_cryptolocker.exe	28
PID 2548 wrote to memory of 1888	2548	2024-06-11_3e3cf6d3d147175679e0310d362e99b4_cryptolocker.exe	28
PID 2548 wrote to memory of 1888	2548	2024-06-11_3e3cf6d3d147175679e0310d362e99b4_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-06-11_3e3cf6d3d147175679e0310d362e99b4_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-11_3e3cf6d3d147175679e0310d362e99b4_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:2548
- C:\Users\Admin\AppData\Local\Temp\rewok.exe
  "C:\Users\Admin\AppData\Local\Temp\rewok.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of UnmapMainImage
  PID:1888

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\rewok.exe

Filesize
33KB

MD5
1c70f57a33a753154eb17d46f5c338cb

SHA1
d4a91d62ee49d095479a46346e5fd9a00a664285

SHA256
8459ed4f1f0857557dfbc7391a944655efae93e6c560dd342ec902b3b6de2a1b

SHA512
837a4099d0e1f8aaa40a9931fa58c2e7b3c08d2e32896047058868c5988b62a05db91fd30cc09c8dbbc64dfd85867b04bed04411fe2d21adfe48058952d34cb3

Download Submit
memory/1888-24-0x0000000000290000-0x0000000000296000-memory.dmp

Filesize
24KB

Download
memory/2548-0-0x0000000000400000-0x000000000040D000-memory.dmp

Filesize
52KB

Download
memory/2548-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/2548-1-0x0000000001CE0000-0x0000000001CE6000-memory.dmp

Filesize
24KB

Download
memory/2548-9-0x0000000001CE0000-0x0000000001CE6000-memory.dmp

Filesize
24KB

Download
memory/2548-13-0x0000000002F50000-0x0000000002F5D000-memory.dmp

Filesize
52KB

Download