e79e8a6b9497afd3db77e42a61d628620c0112d1eb5bd9d9710341126e72edff

Analysis

max time kernel
148s
max time network
154s
platform
windows10-2004_x64
resource
win10v2004-20240412-en
resource tags

arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
submitted
25/04/2024, 04:51

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General

Target

2024-04-25_d224c38d2372ecb66a96e3936c3bbc0f_cryptolocker.exe
Size

55KB
MD5

d224c38d2372ecb66a96e3936c3bbc0f
SHA1

cdbd826347b7cab20453b251d45a5310461aa7b1
SHA256

e79e8a6b9497afd3db77e42a61d628620c0112d1eb5bd9d9710341126e72edff
SHA512

e0ac5b0e9770cd2800eaef93606212db3d2b66f6a17bc058858ab8215cfec0e0c199529fcb834f2a6f89286b9e9c012ae017d88a7d2ba1d51f51a999d95a0e6d
SSDEEP

768:bP9g/WItCSsAfFaeOcfXVr3BPOz5CFBmNuFgUjla:bP9g/xtCS3Dxx0F

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 3 IoCs

resource	yara_rule
behavioral2/memory/2224-0-0x0000000000400000-0x000000000040E000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x00090000000233c1-13.dat	CryptoLocker_rule2
behavioral2/memory/3364-18-0x0000000000400000-0x000000000040E000-memory.dmp	CryptoLocker_rule2

UPX dump on OEP (original entry point) 3 IoCs

resource	yara_rule
behavioral2/memory/2224-0-0x0000000000400000-0x000000000040E000-memory.dmp	UPX
behavioral2/files/0x00090000000233c1-13.dat	UPX
behavioral2/memory/3364-18-0x0000000000400000-0x000000000040E000-memory.dmp	UPX

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1132431369-515282257-1998160155-1000\Control Panel\International\Geo\Nation	2024-04-25_d224c38d2372ecb66a96e3936c3bbc0f_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3364	gewos.exe

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2224-0-0x0000000000400000-0x000000000040E000-memory.dmp	upx
behavioral2/files/0x00090000000233c1-13.dat	upx
behavioral2/memory/3364-18-0x0000000000400000-0x000000000040E000-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 WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 2224 wrote to memory of 3364	2224	2024-04-25_d224c38d2372ecb66a96e3936c3bbc0f_cryptolocker.exe	87
PID 2224 wrote to memory of 3364	2224	2024-04-25_d224c38d2372ecb66a96e3936c3bbc0f_cryptolocker.exe	87
PID 2224 wrote to memory of 3364	2224	2024-04-25_d224c38d2372ecb66a96e3936c3bbc0f_cryptolocker.exe	87

C:\Users\Admin\AppData\Local\Temp\2024-04-25_d224c38d2372ecb66a96e3936c3bbc0f_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-25_d224c38d2372ecb66a96e3936c3bbc0f_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2224
- C:\Users\Admin\AppData\Local\Temp\gewos.exe
  "C:\Users\Admin\AppData\Local\Temp\gewos.exe"
  2⤵
  - Executes dropped EXE
  PID:3364

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\gewos.exe

Filesize
55KB

MD5
9d8f5c173f67f949d8a0865960eef8e0

SHA1
0b7f3e758e7c31addd1404dea85a3e88cba2210f

SHA256
fc6b1137bfb16bda60b708d351a1863a170e8f955ac4e297216efe380632c36b

SHA512
24bb131a34a332903de6736d56a21ccb3a25a17c9ff405e45bcfae0a1c95c03f09131cb6b8e4d71f915103aa596f997be68bcb0f745992670145f28236a0ee32

Download Submit
memory/2224-0-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/2224-1-0x0000000002250000-0x0000000002256000-memory.dmp

Filesize
24KB

Download
memory/2224-3-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/2224-2-0x0000000002250000-0x0000000002256000-memory.dmp

Filesize
24KB

Download
memory/3364-18-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/3364-25-0x00000000005B0000-0x00000000005B6000-memory.dmp

Filesize
24KB

Download