9224b4e8179cfe9b694c62ba67efdd0578dba4b8a616899598338bf0a36acd48

Analysis

max time kernel
93s
max time network
125s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
06-06-2024 21:30

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General

Target

2024-06-06_893f4728c57abe52bd6ed334463de1dc_cryptolocker.exe
Size

58KB
MD5

893f4728c57abe52bd6ed334463de1dc
SHA1

8ab6ba6660ac33f507159b68d1a1e47091f5960e
SHA256

9224b4e8179cfe9b694c62ba67efdd0578dba4b8a616899598338bf0a36acd48
SHA512

3767fb30bf790a50df8dacd6096f3514f7e1da734848e0daff44f3603e861218c6c13f0fbc0ce67f8bbe218ebb1a6d8b80398819ec4ddeebc130596cb017a522
SSDEEP

768:bP9g/WItCSsAfFaeOcfXVr3BPOz5CFBmNuFgUjlggG:bP9g/xtCS3Dxx0R

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 3 IoCs

resource	yara_rule
behavioral2/memory/4696-0-0x0000000000400000-0x000000000040E000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0009000000023403-13.dat	CryptoLocker_rule2
behavioral2/memory/1412-19-0x0000000000400000-0x000000000040E000-memory.dmp	CryptoLocker_rule2

UPX dump on OEP (original entry point) 3 IoCs

resource	yara_rule
behavioral2/memory/4696-0-0x0000000000400000-0x000000000040E000-memory.dmp	UPX
behavioral2/files/0x0009000000023403-13.dat	UPX
behavioral2/memory/1412-19-0x0000000000400000-0x000000000040E000-memory.dmp	UPX

Checks computer location settings 2 TTPs 2 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-1-5-21-540404634-651139247-2967210625-1000\Control Panel\International\Geo\Nation	gewos.exe
Key value queried	\REGISTRY\USER\S-1-5-21-540404634-651139247-2967210625-1000\Control Panel\International\Geo\Nation	2024-06-06_893f4728c57abe52bd6ed334463de1dc_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1412	gewos.exe

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4696-0-0x0000000000400000-0x000000000040E000-memory.dmp	upx
behavioral2/files/0x0009000000023403-13.dat	upx
behavioral2/memory/1412-19-0x0000000000400000-0x000000000040E000-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 4696 wrote to memory of 1412	4696	2024-06-06_893f4728c57abe52bd6ed334463de1dc_cryptolocker.exe	82
PID 4696 wrote to memory of 1412	4696	2024-06-06_893f4728c57abe52bd6ed334463de1dc_cryptolocker.exe	82
PID 4696 wrote to memory of 1412	4696	2024-06-06_893f4728c57abe52bd6ed334463de1dc_cryptolocker.exe	82

C:\Users\Admin\AppData\Local\Temp\2024-06-06_893f4728c57abe52bd6ed334463de1dc_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-06_893f4728c57abe52bd6ed334463de1dc_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4696
- C:\Users\Admin\AppData\Local\Temp\gewos.exe
  "C:\Users\Admin\AppData\Local\Temp\gewos.exe"
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  PID:1412

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
58KB

MD5
91800265b4e4f7cbfff818570707bb16

SHA1
ec2a71ebb6622ca183eaee93825071351bb1b6b3

SHA256
962d11682962616a0770f73a8d0178d0c8c16b00bd6db9522ac7ac042642f8ca

SHA512
ee4cec7bfef2314b130a1cd768526fd6ed54b495203cd9eddd444072bdd70bc20975ff494408695d0a2446391ed855401b1ad692bd03c71a8393619f58245afb

Download Submit
C:\Users\Admin\AppData\Local\Temp\gewosik.exe

Filesize
185B

MD5
62fdce58b51e2e3a54077dc7ce20416e

SHA1
de5f2acb439c12a84edd99a1f6ae514f99db085e

SHA256
7e51f8307830f82a8e503ca91de8ec2bf6404dc64e4b93ac13f5e4fd9f278642

SHA512
cbacdd5a58a78ee6f6dbde4aec6328deb1ccbcddd84ab5001fe54a2275b3648f19e9d0016c025a0c17acaa5f244da8082a1c72aa288bf3c3782ce5bf98cbcb56

Download Submit
memory/1412-19-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/1412-27-0x0000000002110000-0x0000000002116000-memory.dmp

Filesize
24KB

Download
memory/4696-0-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/4696-1-0x0000000002100000-0x0000000002106000-memory.dmp

Filesize
24KB

Download
memory/4696-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/4696-9-0x0000000002100000-0x0000000002106000-memory.dmp

Filesize
24KB

Download