3f34a18e027dd2b798bc28341c948df1772ed552090c6041ffe71fd592175fc0

Analysis

max time kernel
134s
max time network
145s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
08-06-2024 07:04

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General

Target

2024-06-08_3bf485761dd9a09e91c9fb6d968deb71_cryptolocker.exe
Size

57KB
MD5

3bf485761dd9a09e91c9fb6d968deb71
SHA1

293f3d9a6e5ab495dbe1fa78e3d35d34c6fd9373
SHA256

3f34a18e027dd2b798bc28341c948df1772ed552090c6041ffe71fd592175fc0
SHA512

c02ff2b3dbb38972f2fdfc704e584d207b0d86a4816aa03b824b164cc4a57d62176a17ff4cb5c39df1d325aa8a681ba745f84981e40a3a507f589e476baa77d5
SSDEEP

768:bP9g/WItCSsAfFaeOcfXVr3BPOz5CFBmNuFgUjlgzCY:bP9g/xtCS3Dxx0nCY

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 3 IoCs

resource	yara_rule
behavioral1/memory/2220-0-0x0000000000400000-0x000000000040E000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000c00000001441e-11.dat	CryptoLocker_rule2
behavioral1/memory/2000-16-0x0000000000400000-0x000000000040E000-memory.dmp	CryptoLocker_rule2

UPX dump on OEP (original entry point) 3 IoCs

resource	yara_rule
behavioral1/memory/2220-0-0x0000000000400000-0x000000000040E000-memory.dmp	UPX
behavioral1/files/0x000c00000001441e-11.dat	UPX
behavioral1/memory/2000-16-0x0000000000400000-0x000000000040E000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2000	gewos.exe

Loads dropped DLL 1 IoCs

pid	Process
2220	2024-06-08_3bf485761dd9a09e91c9fb6d968deb71_cryptolocker.exe

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2220-0-0x0000000000400000-0x000000000040E000-memory.dmp	upx
behavioral1/files/0x000c00000001441e-11.dat	upx
behavioral1/memory/2000-16-0x0000000000400000-0x000000000040E000-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
2220	2024-06-08_3bf485761dd9a09e91c9fb6d968deb71_cryptolocker.exe
2000	gewos.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2220 wrote to memory of 2000	2220	2024-06-08_3bf485761dd9a09e91c9fb6d968deb71_cryptolocker.exe	28
PID 2220 wrote to memory of 2000	2220	2024-06-08_3bf485761dd9a09e91c9fb6d968deb71_cryptolocker.exe	28
PID 2220 wrote to memory of 2000	2220	2024-06-08_3bf485761dd9a09e91c9fb6d968deb71_cryptolocker.exe	28
PID 2220 wrote to memory of 2000	2220	2024-06-08_3bf485761dd9a09e91c9fb6d968deb71_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-06-08_3bf485761dd9a09e91c9fb6d968deb71_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-08_3bf485761dd9a09e91c9fb6d968deb71_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:2220
- 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:2000

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
58KB

MD5
d04326b598b450c027e1e5cf681d35c9

SHA1
3770ada6ec453b0995ade6ade3eeef699f659d96

SHA256
4ba62121f38d2ef456729e744aa48dc0bf03d5d5f0f9127b125e20bf503cdaba

SHA512
cd84b39bc3340f86c27d3f6f86c1fb3f701add8e4c71df6e6611a2433c37be975f569b731a8c581c8b1198925c3a4dcecd3f2a19cf01c81455a4220dbfcf48b2

Download Submit
memory/2000-16-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/2000-25-0x0000000000260000-0x0000000000266000-memory.dmp

Filesize
24KB

Download
memory/2220-0-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/2220-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/2220-1-0x0000000000490000-0x0000000000496000-memory.dmp

Filesize
24KB

Download
memory/2220-9-0x0000000000490000-0x0000000000496000-memory.dmp

Filesize
24KB

Download