6cfa09fa8a608ddd353f808c3c0eeb119b3abed7a9626f0d8c8ff298e65e8833

Analysis

max time kernel
134s
max time network
123s
platform
windows10-2004_x64
resource
win10v2004-20240419-en
resource tags

arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
submitted
04/05/2024, 20:33

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General

Target

2024-05-04_cb1e56579fb849c57b9c18c6815d0a57_cryptolocker.exe
Size

55KB
MD5

cb1e56579fb849c57b9c18c6815d0a57
SHA1

6164491bcea5d7ce86cc378403a41bc58a3f809b
SHA256

6cfa09fa8a608ddd353f808c3c0eeb119b3abed7a9626f0d8c8ff298e65e8833
SHA512

9847570d2c24be6321dcb2d0af6db20d5a71f9385d74e719bd477f6968f80be36687b514c0267c0e99cf33562152c49bd4afd83344897bf9f89f7ee086402439
SSDEEP

768:bP9g/WItCSsAfFaeOcfXVr3BPOz5CFBmNuFgUjl+L/:bP9g/xtCS3Dxx0JD

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 3 IoCs

resource	yara_rule
behavioral2/memory/1516-0-0x0000000000400000-0x000000000040E000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000c000000023b4d-13.dat	CryptoLocker_rule2
behavioral2/memory/1480-18-0x0000000000400000-0x000000000040E000-memory.dmp	CryptoLocker_rule2

UPX dump on OEP (original entry point) 3 IoCs

resource	yara_rule
behavioral2/memory/1516-0-0x0000000000400000-0x000000000040E000-memory.dmp	UPX
behavioral2/files/0x000c000000023b4d-13.dat	UPX
behavioral2/memory/1480-18-0x0000000000400000-0x000000000040E000-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-1-5-21-2818691465-3043947619-2475182763-1000\Control Panel\International\Geo\Nation	2024-05-04_cb1e56579fb849c57b9c18c6815d0a57_cryptolocker.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2818691465-3043947619-2475182763-1000\Control Panel\International\Geo\Nation	gewos.exe

Executes dropped EXE 1 IoCs

pid	Process
1480	gewos.exe

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1516-0-0x0000000000400000-0x000000000040E000-memory.dmp	upx
behavioral2/files/0x000c000000023b4d-13.dat	upx
behavioral2/memory/1480-18-0x0000000000400000-0x000000000040E000-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 1516 wrote to memory of 1480	1516	2024-05-04_cb1e56579fb849c57b9c18c6815d0a57_cryptolocker.exe	85
PID 1516 wrote to memory of 1480	1516	2024-05-04_cb1e56579fb849c57b9c18c6815d0a57_cryptolocker.exe	85
PID 1516 wrote to memory of 1480	1516	2024-05-04_cb1e56579fb849c57b9c18c6815d0a57_cryptolocker.exe	85

C:\Users\Admin\AppData\Local\Temp\2024-05-04_cb1e56579fb849c57b9c18c6815d0a57_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-04_cb1e56579fb849c57b9c18c6815d0a57_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1516
- 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:1480

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
e0b04ce3d40318adb220fb0d4d2a6a35

SHA1
ed36bd1189d8058131bd52e183af681ca4d3b1bb

SHA256
753d19a805a7b2ab5c53e0e13e97b413e22173578f85a8c1ba74559ae162cbeb

SHA512
42802f0b4b2af75ac31efb36feafa6b56c628c40231cba2a0d7abb99923aff6ff4ae8c44a41b51d140f7540d4b50c8b41103c3edba63674878cf30fe55bca927

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

Filesize
185B

MD5
9f862c1b5b8b0a8bade7d488890cbdf2

SHA1
01da8bc5f2ee1355c0f964e3dce442bb0506fb13

SHA256
8cd108c1b0135c76b5896eb02e94250da98be8776cb8bfaa2ea69c553740fe50

SHA512
bf7b2600119e5c742473fbe741edb5dac226e6c69334d0c0b0f93c99b0701e57b8f60489f21c4380c72fa2245020003569adc052c3f34b9cbda5db3f93c823f2

Download Submit
memory/1480-18-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/1480-27-0x0000000002140000-0x0000000002146000-memory.dmp

Filesize
24KB

Download
memory/1516-0-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/1516-1-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

Filesize
24KB

Download
memory/1516-9-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

Filesize
24KB

Download
memory/1516-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download