215bbd4de8c54321b629e411a8e69dc3dd11742558f2bc538fec420f5362cfea

Analysis

max time kernel
148s
max time network
149s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
26/04/2024, 05:13

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General

Target

2024-04-26_e4f32c3455f7e37e7d08480d56d24550_cryptolocker.exe
Size

55KB
MD5

e4f32c3455f7e37e7d08480d56d24550
SHA1

080b258afd7806d02d8adc442a344e032581d057
SHA256

215bbd4de8c54321b629e411a8e69dc3dd11742558f2bc538fec420f5362cfea
SHA512

24727428bbf394b2638ed9142753b2b5e9f2a748307787e678c9ab9a47cbfffdc1c9b66b39b7b596b932606c5cb7531d8db1c7ee20bc09e3e89c50df1b5cafe2
SSDEEP

768:bP9g/WItCSsAfFaeOcfXVr3BPOz5CFBmNuFgUjl+7:bP9g/xtCS3Dxx0J7

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral1/memory/2856-0-0x0000000000400000-0x000000000040E000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000a000000012251-11.dat	CryptoLocker_rule2
behavioral1/memory/2800-17-0x0000000000400000-0x000000000040E000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2856-26-0x0000000000400000-0x000000000040E000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2800-27-0x0000000000400000-0x000000000040E000-memory.dmp	CryptoLocker_rule2

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral1/memory/2856-0-0x0000000000400000-0x000000000040E000-memory.dmp	UPX
behavioral1/files/0x000a000000012251-11.dat	UPX
behavioral1/memory/2800-17-0x0000000000400000-0x000000000040E000-memory.dmp	UPX
behavioral1/memory/2856-26-0x0000000000400000-0x000000000040E000-memory.dmp	UPX
behavioral1/memory/2800-27-0x0000000000400000-0x000000000040E000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2800	gewos.exe

Loads dropped DLL 1 IoCs

pid	Process
2856	2024-04-26_e4f32c3455f7e37e7d08480d56d24550_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2856-0-0x0000000000400000-0x000000000040E000-memory.dmp	upx
behavioral1/files/0x000a000000012251-11.dat	upx
behavioral1/memory/2800-17-0x0000000000400000-0x000000000040E000-memory.dmp	upx
behavioral1/memory/2856-26-0x0000000000400000-0x000000000040E000-memory.dmp	upx
behavioral1/memory/2800-27-0x0000000000400000-0x000000000040E000-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
2856	2024-04-26_e4f32c3455f7e37e7d08480d56d24550_cryptolocker.exe
2800	gewos.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2856 wrote to memory of 2800	2856	2024-04-26_e4f32c3455f7e37e7d08480d56d24550_cryptolocker.exe	28
PID 2856 wrote to memory of 2800	2856	2024-04-26_e4f32c3455f7e37e7d08480d56d24550_cryptolocker.exe	28
PID 2856 wrote to memory of 2800	2856	2024-04-26_e4f32c3455f7e37e7d08480d56d24550_cryptolocker.exe	28
PID 2856 wrote to memory of 2800	2856	2024-04-26_e4f32c3455f7e37e7d08480d56d24550_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-04-26_e4f32c3455f7e37e7d08480d56d24550_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-26_e4f32c3455f7e37e7d08480d56d24550_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:2856
- C:\Users\Admin\AppData\Local\Temp\gewos.exe
  "C:\Users\Admin\AppData\Local\Temp\gewos.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of UnmapMainImage
  PID:2800

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\gewos.exe

Filesize
55KB

MD5
fe694089a54f81e2d91854ff61b01748

SHA1
37ca4f9bda9e7215316cc31435001eeaf90ca718

SHA256
ac21d411346fc0ef47d8af1d7ff390ac409ea50521c92d8506aabab9bad37b5b

SHA512
24dbf0436e3237df3e2b67dfd1ed5e3e624abd7ed499639056c3a24377d1d58d45f157f37aa356bd51a4bcac01ace6313f61f590cc5bae1680a55ea730976452

Download Submit
memory/2800-17-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/2800-19-0x0000000000380000-0x0000000000386000-memory.dmp

Filesize
24KB

Download
memory/2800-27-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/2856-0-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/2856-1-0x00000000003D0000-0x00000000003D6000-memory.dmp

Filesize
24KB

Download
memory/2856-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/2856-5-0x00000000003D0000-0x00000000003D6000-memory.dmp

Filesize
24KB

Download
memory/2856-26-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download