f25d40e1767be77e4145cb59c1e45634c7e8c81d641c53a975f2635e63245934

Analysis

max time kernel
150s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
28/02/2024, 22:29

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General

Target

2024-02-28_b056add30610287691460e958096422e_cryptolocker.exe
Size

46KB
MD5

b056add30610287691460e958096422e
SHA1

efe351130ebe79c8eb4c081b8588e5e4499339a1
SHA256

f25d40e1767be77e4145cb59c1e45634c7e8c81d641c53a975f2635e63245934
SHA512

422ddcad4e0205fe5511118d40aa12c047d827867e189cb174a76fe2409480e78d2eba398e79ce3426edf28472265c0d614bee4f7dc44c736857e26ca93bc322
SSDEEP

768:btB9g/WItCSsAGjX7r3BPOMHoc/QQJP5q4X:btB9g/xtCSKfxLIc/C4X

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x000400000001e980-12.dat	CryptoLocker_rule2

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-1-5-21-3270530367-132075249-2153716227-1000\Control Panel\International\Geo\Nation	gewos.exe
Key value queried	\REGISTRY\USER\S-1-5-21-3270530367-132075249-2153716227-1000\Control Panel\International\Geo\Nation	2024-02-28_b056add30610287691460e958096422e_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3580	gewos.exe

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 2780 wrote to memory of 3580	2780	2024-02-28_b056add30610287691460e958096422e_cryptolocker.exe	91
PID 2780 wrote to memory of 3580	2780	2024-02-28_b056add30610287691460e958096422e_cryptolocker.exe	91
PID 2780 wrote to memory of 3580	2780	2024-02-28_b056add30610287691460e958096422e_cryptolocker.exe	91

C:\Users\Admin\AppData\Local\Temp\2024-02-28_b056add30610287691460e958096422e_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-28_b056add30610287691460e958096422e_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2780
- 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:3580

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
46KB

MD5
72e9c75a76f42a8be3476094b2e50760

SHA1
cca413d6157f71d9fec6a07046e0b6c9217452d2

SHA256
5c0e3e79e6ac56913ccdb7e62dada19914e2c1af67edb4ab625f48f397a48c0e

SHA512
c3bded32c88da5613dc04832aa3378306c3955d647602d7e5b3b761bf9322c73387cc1a9958d6baf55829fd5e1128ea85654fa13a811f3c290b683b3d2433231

Download Submit
memory/2780-0-0x00000000021E0000-0x00000000021E6000-memory.dmp

Filesize
24KB

Download
memory/2780-1-0x00000000021E0000-0x00000000021E6000-memory.dmp

Filesize
24KB

Download
memory/2780-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/3580-22-0x00000000020A0000-0x00000000020A6000-memory.dmp

Filesize
24KB

Download